pixman: Branch 'master' - 5 commits
Siarhei Siamashka
siamashka at kemper.freedesktop.org
Thu Dec 6 07:34:20 PST 2012
demos/Makefile.am | 3
test/Makefile.sources | 3
test/affine-test.c | 111 +++++++++-----------
test/alpha-loop.c | 11 +-
test/alphamap.c | 2
test/blitters-test.c | 60 ++++-------
test/combiner-test.c | 4
test/composite-traps-test.c | 58 +++++-----
test/composite.c | 12 +-
test/glyph-test.c | 94 ++++++++---------
test/prng-test.c | 172 +++++++++++++++++++++++++++++++
test/region-contains-test.c | 28 ++---
test/region-test.c | 10 +
test/rotate-test.c | 14 +-
test/scaling-helpers-test.c | 9 -
test/scaling-test.c | 129 +++++++++++------------
test/stress-test.c | 112 ++++++++++----------
test/utils-prng.c | 238 ++++++++++++++++++++++++++++++++++++++++++++
test/utils-prng.h | 168 +++++++++++++++++++++++++++++++
test/utils.c | 25 +---
test/utils.h | 58 +++++-----
21 files changed, 941 insertions(+), 380 deletions(-)
New commits:
commit ebedd9a2ad8e841cd8323838b5136657d9ebb988
Author: Siarhei Siamashka <siarhei.siamashka at gmail.com>
Date: Sun Nov 25 02:59:25 2012 +0200
test: Get rid of the obsolete 'prng_rand_N' and 'prng_rand_u32'
They are the same as 'prng_rand_n' and 'prng_rand'
diff --git a/test/affine-test.c b/test/affine-test.c
index fc2e05b..f60ec14 100644
--- a/test/affine-test.c
+++ b/test/affine-test.c
@@ -99,18 +99,18 @@ test_composite (int testnum,
if (prng_rand_n (3) > 0)
{
- scale_x = -65536 * 3 + prng_rand_N (65536 * 6);
+ scale_x = -65536 * 3 + prng_rand_n (65536 * 6);
if (prng_rand_n (2))
- scale_y = -65536 * 3 + prng_rand_N (65536 * 6);
+ scale_y = -65536 * 3 + prng_rand_n (65536 * 6);
else
scale_y = scale_x;
pixman_transform_init_scale (&transform, scale_x, scale_y);
}
if (prng_rand_n (3) > 0)
{
- translate_x = -65536 * 3 + prng_rand_N (6 * 65536);
+ translate_x = -65536 * 3 + prng_rand_n (6 * 65536);
if (prng_rand_n (2))
- translate_y = -65536 * 3 + prng_rand_N (6 * 65536);
+ translate_y = -65536 * 3 + prng_rand_n (6 * 65536);
else
translate_y = translate_x;
pixman_transform_translate (&transform, NULL, translate_x, translate_y);
@@ -142,8 +142,8 @@ test_composite (int testnum,
break;
default:
/* arbitrary rotation */
- c = prng_rand_N (2 * 65536) - 65536;
- s = prng_rand_N (2 * 65536) - 65536;
+ c = prng_rand_n (2 * 65536) - 65536;
+ s = prng_rand_n (2 * 65536) - 65536;
break;
}
pixman_transform_rotate (&transform, NULL, c, s);
diff --git a/test/combiner-test.c b/test/combiner-test.c
index 7d6feda..01f63a5 100644
--- a/test/combiner-test.c
+++ b/test/combiner-test.c
@@ -67,7 +67,7 @@ static const pixman_op_t op_list[] =
static float
rand_float (void)
{
- uint32_t u = prng_rand_u32();
+ uint32_t u = prng_rand();
return *(float *)&u;
}
diff --git a/test/composite-traps-test.c b/test/composite-traps-test.c
index 5a4a921..2983eae 100644
--- a/test/composite-traps-test.c
+++ b/test/composite-traps-test.c
@@ -37,7 +37,7 @@ destroy_bits (pixman_image_t *image, void *data)
static pixman_fixed_t
random_fixed (int n)
{
- return prng_rand_N (n << 16);
+ return prng_rand_n (n << 16);
}
/*
diff --git a/test/glyph-test.c b/test/glyph-test.c
index 7edb3be..1811add 100644
--- a/test/glyph-test.c
+++ b/test/glyph-test.c
@@ -126,10 +126,10 @@ create_image (int max_size, const pixman_format_code_t *formats, uint32_t flags)
{
pixman_color_t color;
- color.alpha = prng_rand_u32();
- color.red = prng_rand_u32();
- color.green = prng_rand_u32();
- color.blue = prng_rand_u32();
+ color.alpha = prng_rand();
+ color.red = prng_rand();
+ color.green = prng_rand();
+ color.blue = prng_rand();
return pixman_image_create_solid_fill (&color);
}
diff --git a/test/region-contains-test.c b/test/region-contains-test.c
index c757347..096e651 100644
--- a/test/region-contains-test.c
+++ b/test/region-contains-test.c
@@ -15,10 +15,10 @@ make_random_region (pixman_region32_t *region)
int32_t x, y;
uint32_t w, h;
- x = (int32_t)prng_rand_u32() >> 2;
- y = (int32_t)prng_rand_u32() >> 2;
- w = prng_rand_u32() >> 2;
- h = prng_rand_u32() >> 2;
+ x = (int32_t)prng_rand() >> 2;
+ y = (int32_t)prng_rand() >> 2;
+ w = prng_rand() >> 2;
+ h = prng_rand() >> 2;
pixman_region32_union_rect (region, region, x, y, w, h);
}
@@ -65,9 +65,9 @@ random_coord (pixman_region32_t *region, pixman_bool_t x)
switch (prng_rand_n (5))
{
case 0:
- return begin - prng_rand_u32();
+ return begin - prng_rand();
case 1:
- return end + prng_rand_u32 ();
+ return end + prng_rand ();
case 2:
return end;
case 3:
@@ -116,9 +116,9 @@ test_region_contains_rectangle (int i, int verbose)
make_random_region (®ion);
box.x1 = random_coord (®ion, TRUE);
- box.x2 = box.x1 + prng_rand_u32 ();
+ box.x2 = box.x1 + prng_rand ();
box.y1 = random_coord (®ion, FALSE);
- box.y2 = box.y1 + prng_rand_u32 ();
+ box.y2 = box.y1 + prng_rand ();
if (verbose)
{
diff --git a/test/scaling-helpers-test.c b/test/scaling-helpers-test.c
index 2685ae1..cd5ace0 100644
--- a/test/scaling-helpers-test.c
+++ b/test/scaling-helpers-test.c
@@ -57,10 +57,10 @@ main (void)
{
int32_t left_pad1, left_tz1, width1, right_tz1, right_pad1;
int32_t left_pad2, left_tz2, width2, right_tz2, right_pad2;
- pixman_fixed_t vx = prng_rand_N(10000 << 16) - (3000 << 16);
- int32_t width = prng_rand_N(10000);
- int32_t source_image_width = prng_rand_N(10000) + 1;
- pixman_fixed_t unit_x = prng_rand_N(10 << 16) + 1;
+ pixman_fixed_t vx = prng_rand_n(10000 << 16) - (3000 << 16);
+ int32_t width = prng_rand_n(10000);
+ int32_t source_image_width = prng_rand_n(10000) + 1;
+ pixman_fixed_t unit_x = prng_rand_n(10 << 16) + 1;
width1 = width2 = width;
bilinear_pad_repeat_get_scanline_bounds_ref (source_image_width,
diff --git a/test/scaling-test.c b/test/scaling-test.c
index 44f851c..64c12dd 100644
--- a/test/scaling-test.c
+++ b/test/scaling-test.c
@@ -161,10 +161,10 @@ test_composite (int testnum,
if (prng_rand_n (4) > 0)
{
- scale_x = -32768 * 3 + prng_rand_N (65536 * 5);
- scale_y = -32768 * 3 + prng_rand_N (65536 * 5);
- translate_x = prng_rand_N (65536);
- translate_y = prng_rand_N (65536);
+ scale_x = -32768 * 3 + prng_rand_n (65536 * 5);
+ scale_y = -32768 * 3 + prng_rand_n (65536 * 5);
+ translate_x = prng_rand_n (65536);
+ translate_y = prng_rand_n (65536);
pixman_transform_init_scale (&transform, scale_x, scale_y);
pixman_transform_translate (&transform, NULL, translate_x, translate_y);
pixman_image_set_transform (src_img, &transform);
@@ -172,10 +172,10 @@ test_composite (int testnum,
if (prng_rand_n (2) > 0)
{
- mask_scale_x = -32768 * 3 + prng_rand_N (65536 * 5);
- mask_scale_y = -32768 * 3 + prng_rand_N (65536 * 5);
- mask_translate_x = prng_rand_N (65536);
- mask_translate_y = prng_rand_N (65536);
+ mask_scale_x = -32768 * 3 + prng_rand_n (65536 * 5);
+ mask_scale_y = -32768 * 3 + prng_rand_n (65536 * 5);
+ mask_translate_x = prng_rand_n (65536);
+ mask_translate_y = prng_rand_n (65536);
pixman_transform_init_scale (&transform, mask_scale_x, mask_scale_y);
pixman_transform_translate (&transform, NULL, mask_translate_x, mask_translate_y);
pixman_image_set_transform (mask_img, &transform);
diff --git a/test/stress-test.c b/test/stress-test.c
index 8b99904..ee55c21 100644
--- a/test/stress-test.c
+++ b/test/stress-test.c
@@ -96,7 +96,7 @@ get_size (void)
return 65536;
case 7:
- return prng_rand_N (64000) + 63000;
+ return prng_rand_n (64000) + 63000;
}
}
@@ -164,7 +164,7 @@ real_writer (void *src, uint32_t value, int size)
static uint32_t
fake_reader (const void *src, int size)
{
- uint32_t r = prng_rand_u32 ();
+ uint32_t r = prng_rand ();
assert (size == 1 || size == 2 || size == 4);
@@ -184,7 +184,7 @@ log_rand (void)
mask = (1 << prng_rand_n (10)) - 1;
- return (prng_rand_u32 () & mask) - (mask >> 1);
+ return (prng_rand () & mask) - (mask >> 1);
}
static int32_t
@@ -334,7 +334,7 @@ create_random_bits_image (void)
int i;
for (i = 0; i < width * height; ++i)
- coefficients[i + 2] = prng_rand_u32();
+ coefficients[i + 2] = prng_rand();
coefficients[0] = width << 16;
coefficients[1] = height << 16;
@@ -508,22 +508,22 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
{
case 0:
/* rotation */
- c = prng_rand_N (2 * 65536) - 65536;
- s = prng_rand_N (2 * 65536) - 65536;
+ c = prng_rand_n (2 * 65536) - 65536;
+ s = prng_rand_n (2 * 65536) - 65536;
pixman_transform_rotate (&xform, NULL, c, s);
break;
case 1:
/* translation */
- tx = prng_rand_u32();
- ty = prng_rand_u32();
+ tx = prng_rand();
+ ty = prng_rand();
pixman_transform_translate (&xform, NULL, tx, ty);
break;
case 2:
/* scale */
- sx = prng_rand_u32();
- sy = prng_rand_u32();
+ sx = prng_rand();
+ sy = prng_rand();
pixman_transform_scale (&xform, NULL, sx, sy);
break;
@@ -533,7 +533,7 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
/* random */
for (i = 0; i < 3; ++i)
for (j = 0; j < 3; ++j)
- xform.matrix[i][j] = prng_rand_u32();
+ xform.matrix[i][j] = prng_rand();
break;
}
else if (prng_rand_n (16) == 0)
diff --git a/test/utils.c b/test/utils.c
index dd0e556..66c8dcb 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -682,7 +682,7 @@ get_random_seed (void)
t.d = gettime();
prng_srand (t.u32);
- return prng_rand_u32 ();
+ return prng_rand ();
}
#ifdef HAVE_SIGACTION
diff --git a/test/utils.h b/test/utils.h
index f054887..78cf0d1 100644
--- a/test/utils.h
+++ b/test/utils.h
@@ -46,18 +46,6 @@ prng_rand_n (int max)
return prng_rand () % max;
}
-static inline uint32_t
-prng_rand_N (int max)
-{
- return prng_rand () % max;
-}
-
-static inline uint32_t
-prng_rand_u32 (void)
-{
- return prng_rand ();
-}
-
static inline void
prng_randmemset (void *buffer, size_t size, prng_randmemset_flags_t flags)
{
commit b31a696263f1ae9aebb9bb21b93a0c15453bf611
Author: Siarhei Siamashka <siarhei.siamashka at gmail.com>
Date: Sun Nov 25 02:50:35 2012 +0200
test: Switch to the new PRNG instead of old LCG
Wallclock time for running pixman "make check" (compile time not included):
----------------------------+----------------+-----------------------------+
| old PRNG (LCG) | new PRNG (Bob Jenkins) |
Processor type +----------------+------------+----------------+
| gcc 4.5 | gcc 4.5 | gcc 4.7 (simd) |
----------------------------+----------------+------------+----------------+
quad Intel Core i7 @2.8GHz | 0m49.494s | 0m43.722s | 0m37.560s |
dual ARM Cortex-A15 @1.7GHz | 5m8.465s | 4m37.375s | 3m45.819s |
IBM Cell PPU @3.2GHz | 23m0.821s | 20m38.316s | 16m37.513s |
----------------------------+----------------+------------+----------------+
But some tests got a particularly large boost. For example benchmarking and
profiling blitters-test on Core i7:
=== before ===
$ time ./blitters-test
real 0m10.907s
user 0m55.650s
sys 0m0.000s
70.45% blitters-test blitters-test [.] create_random_image
15.81% blitters-test blitters-test [.] compute_crc32_for_image_internal
2.26% blitters-test blitters-test [.] _pixman_implementation_lookup_composite
1.07% blitters-test libc-2.15.so [.] _int_free
0.89% blitters-test libc-2.15.so [.] malloc_consolidate
0.87% blitters-test libc-2.15.so [.] _int_malloc
0.75% blitters-test blitters-test [.] combine_conjoint_general_u
0.61% blitters-test blitters-test [.] combine_disjoint_general_u
0.40% blitters-test blitters-test [.] test_composite
0.31% blitters-test libc-2.15.so [.] _int_memalign
0.31% blitters-test blitters-test [.] _pixman_bits_image_setup_accessors
0.28% blitters-test libc-2.15.so [.] malloc
=== after ===
$ time ./blitters-test
real 0m3.655s
user 0m20.550s
sys 0m0.000s
41.77% blitters-test.n blitters-test.new [.] compute_crc32_for_image_internal
15.77% blitters-test.n blitters-test.new [.] prng_randmemset_r
6.15% blitters-test.n blitters-test.new [.] _pixman_implementation_lookup_composite
3.09% blitters-test.n libc-2.15.so [.] _int_free
2.68% blitters-test.n libc-2.15.so [.] malloc_consolidate
2.39% blitters-test.n libc-2.15.so [.] _int_malloc
2.27% blitters-test.n blitters-test.new [.] create_random_image
2.22% blitters-test.n blitters-test.new [.] combine_conjoint_general_u
1.52% blitters-test.n blitters-test.new [.] combine_disjoint_general_u
1.40% blitters-test.n blitters-test.new [.] test_composite
1.02% blitters-test.n blitters-test.new [.] prng_srand_r
1.00% blitters-test.n blitters-test.new [.] _pixman_image_validate
0.96% blitters-test.n blitters-test.new [.] _pixman_bits_image_setup_accessors
0.90% blitters-test.n libc-2.15.so [.] malloc
diff --git a/demos/Makefile.am b/demos/Makefile.am
index f324f5f..96c43f0 100644
--- a/demos/Makefile.am
+++ b/demos/Makefile.am
@@ -6,7 +6,8 @@ AM_LDFLAGS = $(OPENMP_CFLAGS)
LDADD = $(top_builddir)/pixman/libpixman-1.la -lm $(GTK_LIBS) $(PNG_LIBS)
INCLUDES = -I$(top_srcdir)/pixman -I$(top_builddir)/pixman $(GTK_CFLAGS) $(PNG_CFLAGS)
-GTK_UTILS = gtk-utils.c gtk-utils.h ../test/utils.c ../test/utils.h
+GTK_UTILS = gtk-utils.c gtk-utils.h ../test/utils.c ../test/utils.h \
+ ../test/utils-prng.c ../test/utils-prng.h
DEMOS = \
clip-test \
diff --git a/test/affine-test.c b/test/affine-test.c
index d94023b..fc2e05b 100644
--- a/test/affine-test.c
+++ b/test/affine-test.c
@@ -77,11 +77,8 @@ test_composite (int testnum,
srcbuf = (uint32_t *)malloc (src_stride * src_height);
dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
- for (i = 0; i < src_stride * src_height; i++)
- *((uint8_t *)srcbuf + i) = prng_rand_n (256);
-
- for (i = 0; i < dst_stride * dst_height; i++)
- *((uint8_t *)dstbuf + i) = prng_rand_n (256);
+ prng_randmemset (srcbuf, src_stride * src_height, 0);
+ prng_randmemset (dstbuf, dst_stride * dst_height, 0);
src_fmt = src_bpp == 4 ? (prng_rand_n (2) == 0 ?
PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
@@ -310,11 +307,11 @@ test_composite (int testnum,
}
#if BILINEAR_INTERPOLATION_BITS == 8
-#define CHECKSUM 0x344413F0
+#define CHECKSUM 0x97097336
#elif BILINEAR_INTERPOLATION_BITS == 7
-#define CHECKSUM 0xC8181A76
+#define CHECKSUM 0x31D2DC21
#elif BILINEAR_INTERPOLATION_BITS == 4
-#define CHECKSUM 0xD672A457
+#define CHECKSUM 0x8B925154
#else
#define CHECKSUM 0x00000000
#endif
diff --git a/test/alpha-loop.c b/test/alpha-loop.c
index e4d90a9..eca7615 100644
--- a/test/alpha-loop.c
+++ b/test/alpha-loop.c
@@ -8,9 +8,14 @@
int
main (int argc, char **argv)
{
- uint8_t *alpha = make_random_bytes (WIDTH * HEIGHT);
- uint32_t *src = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
- uint32_t *dest = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
+ uint8_t *alpha;
+ uint32_t *src, *dest;
+
+ prng_srand (0);
+
+ alpha = make_random_bytes (WIDTH * HEIGHT);
+ src = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
+ dest = (uint32_t *)make_random_bytes (WIDTH * HEIGHT * 4);
pixman_image_t *a = pixman_image_create_bits (PIXMAN_a8, WIDTH, HEIGHT, (uint32_t *)alpha, WIDTH);
pixman_image_t *d = pixman_image_create_bits (PIXMAN_a8r8g8b8, WIDTH, HEIGHT, dest, WIDTH * 4);
diff --git a/test/alphamap.c b/test/alphamap.c
index 0c5757e..1a6fca5 100644
--- a/test/alphamap.c
+++ b/test/alphamap.c
@@ -307,6 +307,8 @@ main (int argc, char **argv)
{
int i, j, a, b, x, y;
+ prng_srand (0);
+
for (i = 0; i < ARRAY_LENGTH (formats); ++i)
{
for (j = 0; j < ARRAY_LENGTH (formats); ++j)
diff --git a/test/blitters-test.c b/test/blitters-test.c
index b0115d4..9bde99c 100644
--- a/test/blitters-test.c
+++ b/test/blitters-test.c
@@ -25,7 +25,7 @@ create_random_image (pixman_format_code_t *allowed_formats,
int max_extra_stride,
pixman_format_code_t *used_fmt)
{
- int n = 0, i, width, height, stride;
+ int n = 0, width, height, stride;
pixman_format_code_t fmt;
uint32_t *buf;
pixman_image_t *img;
@@ -46,15 +46,7 @@ create_random_image (pixman_format_code_t *allowed_formats,
/* do the allocation */
buf = aligned_malloc (64, stride * height);
- /* initialize image with random data */
- for (i = 0; i < stride * height; i++)
- {
- /* generation is biased to having more 0 or 255 bytes as
- * they are more likely to be special-cased in code
- */
- *((uint8_t *)buf + i) = prng_rand_n (4) ? prng_rand_n (256) :
- (prng_rand_n (2) ? 0 : 255);
- }
+ prng_randmemset (buf, stride * height, RANDMEMSET_MORE_00_AND_FF);
img = pixman_image_create_bits (fmt, width, height, buf, stride);
@@ -390,6 +382,8 @@ main (int argc, const char *argv[])
{
int i;
+ prng_srand (0);
+
for (i = 1; i <= 8; i++)
{
initialize_palette (&(rgb_palette[i]), i, TRUE);
@@ -397,6 +391,6 @@ main (int argc, const char *argv[])
}
return fuzzer_test_main("blitters", 2000000,
- 0x46136E0A,
+ 0xD8265D5E,
test_composite, argc, argv);
}
diff --git a/test/composite-traps-test.c b/test/composite-traps-test.c
index efb3c30..5a4a921 100644
--- a/test/composite-traps-test.c
+++ b/test/composite-traps-test.c
@@ -251,6 +251,6 @@ test_composite (int testnum,
int
main (int argc, const char *argv[])
{
- return fuzzer_test_main("composite traps", 40000, 0x33BFAA55,
+ return fuzzer_test_main("composite traps", 40000, 0x749BCC57,
test_composite, argc, argv);
}
diff --git a/test/glyph-test.c b/test/glyph-test.c
index 2fcc69c..7edb3be 100644
--- a/test/glyph-test.c
+++ b/test/glyph-test.c
@@ -153,14 +153,8 @@ create_image (int max_size, const pixman_format_code_t *formats, uint32_t flags)
}
else
{
- uint8_t *d8;
-
data = malloc (stride * height);
-
- d8 = (uint8_t *)data;
- for (i = 0; i < height * stride; ++i)
- d8[i] = prng_rand_n (256);
-
+ prng_randmemset (data, height * stride, 0);
destroy = destroy_malloced;
}
@@ -333,6 +327,6 @@ int
main (int argc, const char *argv[])
{
return fuzzer_test_main ("glyph", 30000,
- 0x79E74996,
+ 0xFA478A79,
test_glyphs, argc, argv);
}
diff --git a/test/region-contains-test.c b/test/region-contains-test.c
index aca24ad..c757347 100644
--- a/test/region-contains-test.c
+++ b/test/region-contains-test.c
@@ -163,7 +163,7 @@ main (int argc, const char *argv[])
{
return fuzzer_test_main ("region_contains",
1000000,
- 0xD2BF8C73,
+ 0x548E0F3F,
test_region_contains_rectangle,
argc, argv);
}
diff --git a/test/region-test.c b/test/region-test.c
index 87010f7..bfc219b 100644
--- a/test/region-test.c
+++ b/test/region-test.c
@@ -32,6 +32,8 @@ main ()
0xffff
};
+ prng_srand (0);
+
/* This used to go into an infinite loop before pixman-region.c
* was fixed to not use explict "short" variables
*/
diff --git a/test/rotate-test.c b/test/rotate-test.c
index 0fe9301..9d2a620 100644
--- a/test/rotate-test.c
+++ b/test/rotate-test.c
@@ -63,10 +63,8 @@ make_image (void)
pixman_format_code_t format = RANDOM_FORMAT();
uint32_t *bytes = malloc (WIDTH * HEIGHT * 4);
pixman_image_t *image;
- int i;
- for (i = 0; i < WIDTH * HEIGHT * 4; ++i)
- ((uint8_t *)bytes)[i] = prng_rand_n (256);
+ prng_randmemset (bytes, WIDTH * HEIGHT * 4, 0);
image = pixman_image_create_bits (
format, WIDTH, HEIGHT, bytes, WIDTH * 4);
@@ -108,6 +106,6 @@ int
main (int argc, const char *argv[])
{
return fuzzer_test_main ("rotate", 15000,
- 0x5236FD9F,
+ 0xECF5E426,
test_transform, argc, argv);
}
diff --git a/test/scaling-helpers-test.c b/test/scaling-helpers-test.c
index a706020..2685ae1 100644
--- a/test/scaling-helpers-test.c
+++ b/test/scaling-helpers-test.c
@@ -52,6 +52,7 @@ int
main (void)
{
int i;
+ prng_srand (0);
for (i = 0; i < 10000; i++)
{
int32_t left_pad1, left_tz1, width1, right_tz1, right_pad1;
diff --git a/test/scaling-test.c b/test/scaling-test.c
index cfe9b52..44f851c 100644
--- a/test/scaling-test.c
+++ b/test/scaling-test.c
@@ -140,14 +140,9 @@ test_composite (int testnum,
maskbuf = (uint32_t *)malloc (mask_stride * mask_height);
dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
- for (i = 0; i < src_stride * src_height; i++)
- *((uint8_t *)srcbuf + i) = prng_rand_n (256);
-
- for (i = 0; i < mask_stride * mask_height; i++)
- *((uint8_t *)maskbuf + i) = prng_rand_n (256);
-
- for (i = 0; i < dst_stride * dst_height; i++)
- *((uint8_t *)dstbuf + i) = prng_rand_n (256);
+ prng_randmemset (srcbuf, src_stride * src_height, 0);
+ prng_randmemset (maskbuf, mask_stride * mask_height, 0);
+ prng_randmemset (dstbuf, dst_stride * dst_height, 0);
src_fmt = get_format (src_bpp);
dst_fmt = get_format (dst_bpp);
@@ -380,11 +375,11 @@ test_composite (int testnum,
}
#if BILINEAR_INTERPOLATION_BITS == 8
-#define CHECKSUM 0x107B67ED
+#define CHECKSUM 0x9096E6B6
#elif BILINEAR_INTERPOLATION_BITS == 7
-#define CHECKSUM 0x30EC0CF0
+#define CHECKSUM 0xCE8EC6BA
#elif BILINEAR_INTERPOLATION_BITS == 4
-#define CHECKSUM 0x87B496BC
+#define CHECKSUM 0xAB1D39BE
#else
#define CHECKSUM 0x00000000
#endif
diff --git a/test/utils.c b/test/utils.c
index c82ba2b..dd0e556 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -27,10 +27,11 @@
#include <png.h>
#endif
-/* Random number seed
+/* Random number generator state
*/
-uint32_t prng_seed;
+prng_t prng_state_data;
+prng_t *prng_state;
/*----------------------------------------------------------------------------*\
* CRC-32 version 2.0.0 by Craig Bruce, 2006-04-29.
@@ -423,13 +424,11 @@ uint8_t *
make_random_bytes (int n_bytes)
{
uint8_t *bytes = fence_malloc (n_bytes);
- int i;
if (!bytes)
return NULL;
- for (i = 0; i < n_bytes; ++i)
- bytes[i] = prng_rand () & 0xff;
+ prng_randmemset (bytes, n_bytes, 0);
return bytes;
}
diff --git a/test/utils.h b/test/utils.h
index ec4c4ad..f054887 100644
--- a/test/utils.h
+++ b/test/utils.h
@@ -4,6 +4,7 @@
#include <assert.h>
#include "pixman-private.h" /* For 'inline' definition */
+#include "utils-prng.h"
#define ARRAY_LENGTH(A) ((int) (sizeof (A) / sizeof ((A) [0])))
@@ -11,22 +12,32 @@
* taken from POSIX.1-2001 example
*/
-extern uint32_t prng_seed;
+extern prng_t prng_state_data;
+extern prng_t *prng_state;
#ifdef USE_OPENMP
-#pragma omp threadprivate(prng_seed)
+#pragma omp threadprivate(prng_state_data)
+#pragma omp threadprivate(prng_state)
#endif
static inline uint32_t
prng_rand (void)
{
- prng_seed = prng_seed * 1103515245 + 12345;
- return ((uint32_t)(prng_seed / 65536) % 32768);
+ return prng_rand_r (prng_state);
}
static inline void
prng_srand (uint32_t seed)
{
- prng_seed = seed;
+ if (!prng_state)
+ {
+ /* Without setting a seed, PRNG does not work properly (is just
+ * returning zeros). So we only initialize the pointer here to
+ * make sure that 'prng_srand' is always called before any
+ * other 'prng_*' function. The wrongdoers violating this order
+ * will get a segfault. */
+ prng_state = &prng_state_data;
+ }
+ prng_srand_r (prng_state, seed);
}
static inline uint32_t
@@ -38,22 +49,19 @@ prng_rand_n (int max)
static inline uint32_t
prng_rand_N (int max)
{
- uint32_t lo = prng_rand ();
- uint32_t hi = prng_rand () << 15;
- return (lo | hi) % max;
+ return prng_rand () % max;
}
static inline uint32_t
prng_rand_u32 (void)
{
- /* This uses the 10/11 most significant bits from the 3 lcg results
- * (and mixes them with the low from the adjacent one).
- */
- uint32_t lo = prng_rand() >> -(32 - 15 - 11 * 2);
- uint32_t mid = prng_rand() << (32 - 15 - 11 * 1);
- uint32_t hi = prng_rand() << (32 - 15 - 11 * 0);
-
- return (hi ^ mid ^ lo);
+ return prng_rand ();
+}
+
+static inline void
+prng_randmemset (void *buffer, size_t size, prng_randmemset_flags_t flags)
+{
+ prng_randmemset_r (prng_state, buffer, size, flags);
}
/* CRC 32 computation
commit 309e66f047cab0951d8e42628dcd181e2d14c58d
Author: Siarhei Siamashka <siarhei.siamashka at gmail.com>
Date: Sat Nov 24 23:22:48 2012 +0200
test: Search/replace 'lcg_*' -> 'prng_*'
The 'lcg' prefix is going to be misleading if we replace
PRNG algorithm.
diff --git a/test/affine-test.c b/test/affine-test.c
index daa86c8..d94023b 100644
--- a/test/affine-test.c
+++ b/test/affine-test.c
@@ -48,18 +48,18 @@ test_composite (int testnum,
uint32_t crc32;
FLOAT_REGS_CORRUPTION_DETECTOR_START ();
- lcg_srand (testnum);
+ prng_srand (testnum);
- src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
- dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
- op = (lcg_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER;
+ src_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+ dst_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+ op = (prng_rand_n (2) == 0) ? PIXMAN_OP_SRC : PIXMAN_OP_OVER;
- src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
- src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
- dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;
- dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;
- src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;
- dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
+ src_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
+ src_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
+ dst_width = prng_rand_n (MAX_DST_WIDTH) + 1;
+ dst_height = prng_rand_n (MAX_DST_HEIGHT) + 1;
+ src_stride = src_width * src_bpp + prng_rand_n (MAX_STRIDE) * src_bpp;
+ dst_stride = dst_width * dst_bpp + prng_rand_n (MAX_STRIDE) * dst_bpp;
if (src_stride & 3)
src_stride += 2;
@@ -67,26 +67,26 @@ test_composite (int testnum,
if (dst_stride & 3)
dst_stride += 2;
- src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);
- src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);
- dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);
- dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);
- w = lcg_rand_n (dst_width * 3 / 2 - dst_x);
- h = lcg_rand_n (dst_height * 3 / 2 - dst_y);
+ src_x = -(src_width / 4) + prng_rand_n (src_width * 3 / 2);
+ src_y = -(src_height / 4) + prng_rand_n (src_height * 3 / 2);
+ dst_x = -(dst_width / 4) + prng_rand_n (dst_width * 3 / 2);
+ dst_y = -(dst_height / 4) + prng_rand_n (dst_height * 3 / 2);
+ w = prng_rand_n (dst_width * 3 / 2 - dst_x);
+ h = prng_rand_n (dst_height * 3 / 2 - dst_y);
srcbuf = (uint32_t *)malloc (src_stride * src_height);
dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
for (i = 0; i < src_stride * src_height; i++)
- *((uint8_t *)srcbuf + i) = lcg_rand_n (256);
+ *((uint8_t *)srcbuf + i) = prng_rand_n (256);
for (i = 0; i < dst_stride * dst_height; i++)
- *((uint8_t *)dstbuf + i) = lcg_rand_n (256);
+ *((uint8_t *)dstbuf + i) = prng_rand_n (256);
- src_fmt = src_bpp == 4 ? (lcg_rand_n (2) == 0 ?
+ src_fmt = src_bpp == 4 ? (prng_rand_n (2) == 0 ?
PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
- dst_fmt = dst_bpp == 4 ? (lcg_rand_n (2) == 0 ?
+ dst_fmt = dst_bpp == 4 ? (prng_rand_n (2) == 0 ?
PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8) : PIXMAN_r5g6b5;
src_img = pixman_image_create_bits (
@@ -100,29 +100,29 @@ test_composite (int testnum,
pixman_transform_init_identity (&transform);
- if (lcg_rand_n (3) > 0)
+ if (prng_rand_n (3) > 0)
{
- scale_x = -65536 * 3 + lcg_rand_N (65536 * 6);
- if (lcg_rand_n (2))
- scale_y = -65536 * 3 + lcg_rand_N (65536 * 6);
+ scale_x = -65536 * 3 + prng_rand_N (65536 * 6);
+ if (prng_rand_n (2))
+ scale_y = -65536 * 3 + prng_rand_N (65536 * 6);
else
scale_y = scale_x;
pixman_transform_init_scale (&transform, scale_x, scale_y);
}
- if (lcg_rand_n (3) > 0)
+ if (prng_rand_n (3) > 0)
{
- translate_x = -65536 * 3 + lcg_rand_N (6 * 65536);
- if (lcg_rand_n (2))
- translate_y = -65536 * 3 + lcg_rand_N (6 * 65536);
+ translate_x = -65536 * 3 + prng_rand_N (6 * 65536);
+ if (prng_rand_n (2))
+ translate_y = -65536 * 3 + prng_rand_N (6 * 65536);
else
translate_y = translate_x;
pixman_transform_translate (&transform, NULL, translate_x, translate_y);
}
- if (lcg_rand_n (4) > 0)
+ if (prng_rand_n (4) > 0)
{
int c, s, tx = 0, ty = 0;
- switch (lcg_rand_n (4))
+ switch (prng_rand_n (4))
{
case 0:
/* 90 degrees */
@@ -145,32 +145,32 @@ test_composite (int testnum,
break;
default:
/* arbitrary rotation */
- c = lcg_rand_N (2 * 65536) - 65536;
- s = lcg_rand_N (2 * 65536) - 65536;
+ c = prng_rand_N (2 * 65536) - 65536;
+ s = prng_rand_N (2 * 65536) - 65536;
break;
}
pixman_transform_rotate (&transform, NULL, c, s);
pixman_transform_translate (&transform, NULL, tx, ty);
}
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
/* Flip random bits */
int maxflipcount = 8;
while (maxflipcount--)
{
- int i = lcg_rand_n (2);
- int j = lcg_rand_n (3);
- int bitnum = lcg_rand_n (32);
+ int i = prng_rand_n (2);
+ int j = prng_rand_n (3);
+ int bitnum = prng_rand_n (32);
transform.matrix[i][j] ^= 1 << bitnum;
- if (lcg_rand_n (2))
+ if (prng_rand_n (2))
break;
}
}
pixman_image_set_transform (src_img, &transform);
- switch (lcg_rand_n (4))
+ switch (prng_rand_n (4))
{
case 0:
repeat = PIXMAN_REPEAT_NONE;
@@ -193,7 +193,7 @@ test_composite (int testnum,
}
pixman_image_set_repeat (src_img, repeat);
- if (lcg_rand_n (2))
+ if (prng_rand_n (2))
pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
else
pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
@@ -220,19 +220,19 @@ test_composite (int testnum,
printf ("w=%d, h=%d\n", w, h);
}
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
- int n = lcg_rand_n (2) + 1;
+ int n = prng_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (src_width);
- clip_boxes[i].y1 = lcg_rand_n (src_height);
+ clip_boxes[i].x1 = prng_rand_n (src_width);
+ clip_boxes[i].y1 = prng_rand_n (src_height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (src_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (src_height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (src_height - clip_boxes[i].y1);
if (verbose)
{
@@ -248,18 +248,18 @@ test_composite (int testnum,
pixman_region_fini (&clip);
}
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
- int n = lcg_rand_n (2) + 1;
+ int n = prng_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (dst_width);
- clip_boxes[i].y1 = lcg_rand_n (dst_height);
+ clip_boxes[i].x1 = prng_rand_n (dst_width);
+ clip_boxes[i].y1 = prng_rand_n (dst_height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (dst_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (dst_height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (dst_height - clip_boxes[i].y1);
if (verbose)
{
diff --git a/test/blitters-test.c b/test/blitters-test.c
index 30d6912..b0115d4 100644
--- a/test/blitters-test.c
+++ b/test/blitters-test.c
@@ -33,14 +33,14 @@ create_random_image (pixman_format_code_t *allowed_formats,
while (allowed_formats[n] != PIXMAN_null)
n++;
- if (n > N_MOST_LIKELY_FORMATS && lcg_rand_n (4) != 0)
+ if (n > N_MOST_LIKELY_FORMATS && prng_rand_n (4) != 0)
n = N_MOST_LIKELY_FORMATS;
- fmt = allowed_formats[lcg_rand_n (n)];
+ fmt = allowed_formats[prng_rand_n (n)];
- width = lcg_rand_n (max_width) + 1;
- height = lcg_rand_n (max_height) + 1;
+ width = prng_rand_n (max_width) + 1;
+ height = prng_rand_n (max_height) + 1;
stride = (width * PIXMAN_FORMAT_BPP (fmt) + 7) / 8 +
- lcg_rand_n (max_extra_stride + 1);
+ prng_rand_n (max_extra_stride + 1);
stride = (stride + 3) & ~3;
/* do the allocation */
@@ -52,8 +52,8 @@ create_random_image (pixman_format_code_t *allowed_formats,
/* generation is biased to having more 0 or 255 bytes as
* they are more likely to be special-cased in code
*/
- *((uint8_t *)buf + i) = lcg_rand_n (4) ? lcg_rand_n (256) :
- (lcg_rand_n (2) ? 0 : 255);
+ *((uint8_t *)buf + i) = prng_rand_n (4) ? prng_rand_n (256) :
+ (prng_rand_n (2) ? 0 : 255);
}
img = pixman_image_create_bits (fmt, width, height, buf, stride);
@@ -67,7 +67,7 @@ create_random_image (pixman_format_code_t *allowed_formats,
pixman_image_set_indexed (img, &(y_palette[PIXMAN_FORMAT_BPP (fmt)]));
}
- if (lcg_rand_n (16) == 0)
+ if (prng_rand_n (16) == 0)
pixman_image_set_filter (img, PIXMAN_FILTER_BILINEAR, NULL, 0);
image_endian_swap (img);
@@ -251,11 +251,11 @@ test_composite (int testnum, int verbose)
if (max_extra_stride > 8)
max_extra_stride = 8;
- lcg_srand (testnum);
+ prng_srand (testnum);
- op = op_list[lcg_rand_n (ARRAY_LENGTH (op_list))];
+ op = op_list[prng_rand_n (ARRAY_LENGTH (op_list))];
- if (lcg_rand_n (8))
+ if (prng_rand_n (8))
{
/* normal image */
src_img = create_random_image (img_fmt_list, max_width, max_height,
@@ -284,10 +284,10 @@ test_composite (int testnum, int verbose)
dstbuf = pixman_image_get_data (dst_img);
srcbuf = pixman_image_get_data (src_img);
- src_x = lcg_rand_n (src_width);
- src_y = lcg_rand_n (src_height);
- dst_x = lcg_rand_n (dst_width);
- dst_y = lcg_rand_n (dst_height);
+ src_x = prng_rand_n (src_width);
+ src_y = prng_rand_n (src_height);
+ dst_x = prng_rand_n (dst_width);
+ dst_y = prng_rand_n (dst_height);
mask_img = NULL;
mask_fmt = PIXMAN_null;
@@ -296,10 +296,10 @@ test_composite (int testnum, int verbose)
maskbuf = NULL;
if ((src_fmt == PIXMAN_x8r8g8b8 || src_fmt == PIXMAN_x8b8g8r8) &&
- (lcg_rand_n (4) == 0))
+ (prng_rand_n (4) == 0))
{
/* PIXBUF */
- mask_fmt = lcg_rand_n (2) ? PIXMAN_a8r8g8b8 : PIXMAN_a8b8g8r8;
+ mask_fmt = prng_rand_n (2) ? PIXMAN_a8r8g8b8 : PIXMAN_a8b8g8r8;
mask_img = pixman_image_create_bits (mask_fmt,
src_width,
src_height,
@@ -309,9 +309,9 @@ test_composite (int testnum, int verbose)
mask_y = src_y;
maskbuf = srcbuf;
}
- else if (lcg_rand_n (2))
+ else if (prng_rand_n (2))
{
- if (lcg_rand_n (2))
+ if (prng_rand_n (2))
{
mask_img = create_random_image (mask_fmt_list, max_width, max_height,
max_extra_stride, &mask_fmt);
@@ -324,16 +324,16 @@ test_composite (int testnum, int verbose)
pixman_image_set_repeat (mask_img, PIXMAN_REPEAT_NORMAL);
}
- if (lcg_rand_n (2))
+ if (prng_rand_n (2))
pixman_image_set_component_alpha (mask_img, 1);
- mask_x = lcg_rand_n (pixman_image_get_width (mask_img));
- mask_y = lcg_rand_n (pixman_image_get_height (mask_img));
+ mask_x = prng_rand_n (pixman_image_get_width (mask_img));
+ mask_y = prng_rand_n (pixman_image_get_height (mask_img));
}
- w = lcg_rand_n (dst_width - dst_x + 1);
- h = lcg_rand_n (dst_height - dst_y + 1);
+ w = prng_rand_n (dst_width - dst_x + 1);
+ h = prng_rand_n (dst_height - dst_y + 1);
if (verbose)
{
diff --git a/test/combiner-test.c b/test/combiner-test.c
index c438ae6..7d6feda 100644
--- a/test/combiner-test.c
+++ b/test/combiner-test.c
@@ -67,7 +67,7 @@ static const pixman_op_t op_list[] =
static float
rand_float (void)
{
- uint32_t u = lcg_rand_u32();
+ uint32_t u = prng_rand_u32();
return *(float *)&u;
}
@@ -123,7 +123,7 @@ main ()
impl = _pixman_internal_only_get_implementation();
- lcg_srand (0);
+ prng_srand (0);
for (i = 0; i < ARRAY_LENGTH (op_list); ++i)
{
diff --git a/test/composite-traps-test.c b/test/composite-traps-test.c
index 9fc94a4..efb3c30 100644
--- a/test/composite-traps-test.c
+++ b/test/composite-traps-test.c
@@ -26,7 +26,7 @@ static pixman_op_t operators[] =
};
#define RANDOM_ELT(array) \
- ((array)[lcg_rand_n(ARRAY_LENGTH((array)))])
+ ((array)[prng_rand_n(ARRAY_LENGTH((array)))])
static void
destroy_bits (pixman_image_t *image, void *data)
@@ -37,7 +37,7 @@ destroy_bits (pixman_image_t *image, void *data)
static pixman_fixed_t
random_fixed (int n)
{
- return lcg_rand_N (n << 16);
+ return prng_rand_N (n << 16);
}
/*
@@ -75,17 +75,17 @@ test_composite (int testnum,
FLOAT_REGS_CORRUPTION_DETECTOR_START ();
- lcg_srand (testnum);
+ prng_srand (testnum);
op = RANDOM_ELT (operators);
mask_format = RANDOM_ELT (mask_formats);
/* Create source image */
- if (lcg_rand_n (4) == 0)
+ if (prng_rand_n (4) == 0)
{
src_img = pixman_image_create_solid_fill (
- &(colors[lcg_rand_n (ARRAY_LENGTH (colors))]));
+ &(colors[prng_rand_n (ARRAY_LENGTH (colors))]));
src_x = 10;
src_y = 234;
@@ -94,13 +94,13 @@ test_composite (int testnum,
{
pixman_format_code_t src_format = RANDOM_ELT(formats);
int src_bpp = (PIXMAN_FORMAT_BPP (src_format) + 7) / 8;
- int src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
- int src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
- int src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;
+ int src_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
+ int src_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
+ int src_stride = src_width * src_bpp + prng_rand_n (MAX_STRIDE) * src_bpp;
uint32_t *bits;
- src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);
- src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);
+ src_x = -(src_width / 4) + prng_rand_n (src_width * 3 / 2);
+ src_y = -(src_height / 4) + prng_rand_n (src_height * 3 / 2);
src_stride = (src_stride + 3) & ~3;
@@ -111,19 +111,19 @@ test_composite (int testnum,
pixman_image_set_destroy_function (src_img, destroy_bits, bits);
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
- int n = lcg_rand_n (2) + 1;
+ int n = prng_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (src_width);
- clip_boxes[i].y1 = lcg_rand_n (src_height);
+ clip_boxes[i].x1 = prng_rand_n (src_width);
+ clip_boxes[i].y1 = prng_rand_n (src_height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (src_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (src_height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (src_height - clip_boxes[i].y1);
if (verbose)
{
@@ -146,15 +146,15 @@ test_composite (int testnum,
{
dst_format = RANDOM_ELT(formats);
dst_bpp = (PIXMAN_FORMAT_BPP (dst_format) + 7) / 8;
- dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;
- dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;
- dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
+ dst_width = prng_rand_n (MAX_DST_WIDTH) + 1;
+ dst_height = prng_rand_n (MAX_DST_HEIGHT) + 1;
+ dst_stride = dst_width * dst_bpp + prng_rand_n (MAX_STRIDE) * dst_bpp;
dst_stride = (dst_stride + 3) & ~3;
dst_bits = (uint32_t *)make_random_bytes (dst_stride * dst_height);
- dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);
- dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);
+ dst_x = -(dst_width / 4) + prng_rand_n (dst_width * 3 / 2);
+ dst_y = -(dst_height / 4) + prng_rand_n (dst_height * 3 / 2);
dst_img = pixman_image_create_bits (
dst_format, dst_width, dst_height, dst_bits, dst_stride);
@@ -166,7 +166,7 @@ test_composite (int testnum,
{
int i;
- n_traps = lcg_rand_n (25);
+ n_traps = prng_rand_n (25);
traps = fence_malloc (n_traps * sizeof (pixman_trapezoid_t));
for (i = 0; i < n_traps; ++i)
@@ -186,18 +186,18 @@ test_composite (int testnum,
}
}
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
- int n = lcg_rand_n (2) + 1;
+ int n = prng_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (dst_width);
- clip_boxes[i].y1 = lcg_rand_n (dst_height);
+ clip_boxes[i].x1 = prng_rand_n (dst_width);
+ clip_boxes[i].y1 = prng_rand_n (dst_height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (dst_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (dst_height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (dst_height - clip_boxes[i].y1);
if (verbose)
{
diff --git a/test/composite.c b/test/composite.c
index 2930fb7..09752c5 100644
--- a/test/composite.c
+++ b/test/composite.c
@@ -725,19 +725,19 @@ image_fini (image_t *info)
static int
random_size (void)
{
- return lcg_rand_n (ARRAY_LENGTH (sizes));
+ return prng_rand_n (ARRAY_LENGTH (sizes));
}
static int
random_color (void)
{
- return lcg_rand_n (ARRAY_LENGTH (colors));
+ return prng_rand_n (ARRAY_LENGTH (colors));
}
static int
random_format (void)
{
- return lcg_rand_n (ARRAY_LENGTH (formats));
+ return prng_rand_n (ARRAY_LENGTH (formats));
}
static pixman_bool_t
@@ -748,15 +748,15 @@ run_test (uint32_t seed)
int ca;
int ok;
- lcg_srand (seed);
+ prng_srand (seed);
image_init (&dst, random_color(), random_format(), 1);
image_init (&src, random_color(), random_format(), random_size());
image_init (&mask, random_color(), random_format(), random_size());
- op = &(operators [lcg_rand_n (ARRAY_LENGTH (operators))]);
+ op = &(operators [prng_rand_n (ARRAY_LENGTH (operators))]);
- ca = lcg_rand_n (3);
+ ca = prng_rand_n (3);
switch (ca)
{
diff --git a/test/glyph-test.c b/test/glyph-test.c
index 501cc2e..2fcc69c 100644
--- a/test/glyph-test.c
+++ b/test/glyph-test.c
@@ -107,7 +107,7 @@ random_format (const pixman_format_code_t *formats)
i = 0;
while (formats[i] != PIXMAN_null)
++i;
- return formats[lcg_rand_n (i)];
+ return formats[prng_rand_n (i)];
}
static pixman_image_t *
@@ -122,27 +122,27 @@ create_image (int max_size, const pixman_format_code_t *formats, uint32_t flags)
int i;
pixman_image_destroy_func_t destroy;
- if ((flags & ALLOW_SOLID) && lcg_rand_n (4) == 0)
+ if ((flags & ALLOW_SOLID) && prng_rand_n (4) == 0)
{
pixman_color_t color;
- color.alpha = lcg_rand_u32();
- color.red = lcg_rand_u32();
- color.green = lcg_rand_u32();
- color.blue = lcg_rand_u32();
+ color.alpha = prng_rand_u32();
+ color.red = prng_rand_u32();
+ color.green = prng_rand_u32();
+ color.blue = prng_rand_u32();
return pixman_image_create_solid_fill (&color);
}
- width = lcg_rand_n (max_size) + 1;
- height = lcg_rand_n (max_size) + 1;
+ width = prng_rand_n (max_size) + 1;
+ height = prng_rand_n (max_size) + 1;
format = random_format (formats);
bpp = PIXMAN_FORMAT_BPP (format);
- stride = (width * bpp + 7) / 8 + lcg_rand_n (17);
+ stride = (width * bpp + 7) / 8 + prng_rand_n (17);
stride = (stride + 3) & ~3;
- if (lcg_rand_n (64) == 0)
+ if (prng_rand_n (64) == 0)
{
if (!(data = (uint32_t *)make_random_bytes (stride * height)))
{
@@ -159,7 +159,7 @@ create_image (int max_size, const pixman_format_code_t *formats, uint32_t flags)
d8 = (uint8_t *)data;
for (i = 0; i < height * stride; ++i)
- d8[i] = lcg_rand_n (256);
+ d8[i] = prng_rand_n (256);
destroy = destroy_malloced;
}
@@ -167,20 +167,20 @@ create_image (int max_size, const pixman_format_code_t *formats, uint32_t flags)
image = pixman_image_create_bits (format, width, height, data, stride);
pixman_image_set_destroy_function (image, destroy, data);
- if ((flags & ALLOW_CLIPPED) && lcg_rand_n (8) == 0)
+ if ((flags & ALLOW_CLIPPED) && prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[8];
pixman_region16_t clip;
- int n = lcg_rand_n (8) + 1;
+ int n = prng_rand_n (8) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (width);
- clip_boxes[i].y1 = lcg_rand_n (height);
+ clip_boxes[i].x1 = prng_rand_n (width);
+ clip_boxes[i].y1 = prng_rand_n (height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (height - clip_boxes[i].y1);
}
pixman_region_init_rects (&clip, clip_boxes, n);
@@ -188,27 +188,27 @@ create_image (int max_size, const pixman_format_code_t *formats, uint32_t flags)
pixman_region_fini (&clip);
}
- if ((flags & ALLOW_SOURCE_CLIPPING) && lcg_rand_n (4) == 0)
+ if ((flags & ALLOW_SOURCE_CLIPPING) && prng_rand_n (4) == 0)
{
pixman_image_set_source_clipping (image, TRUE);
pixman_image_set_has_client_clip (image, TRUE);
}
- if ((flags & ALLOW_ALPHA_MAP) && lcg_rand_n (16) == 0)
+ if ((flags & ALLOW_ALPHA_MAP) && prng_rand_n (16) == 0)
{
pixman_image_t *alpha_map;
int alpha_x, alpha_y;
- alpha_x = lcg_rand_n (width);
- alpha_y = lcg_rand_n (height);
+ alpha_x = prng_rand_n (width);
+ alpha_y = prng_rand_n (height);
alpha_map =
create_image (max_size, formats, (flags & ~(ALLOW_ALPHA_MAP | ALLOW_SOLID)));
pixman_image_set_alpha_map (image, alpha_map, alpha_x, alpha_y);
pixman_image_unref (alpha_map);
}
- if ((flags & ALLOW_REPEAT) && lcg_rand_n (2) == 0)
- pixman_image_set_repeat (image, lcg_rand_n (4));
+ if ((flags & ALLOW_REPEAT) && prng_rand_n (2) == 0)
+ pixman_image_set_repeat (image, prng_rand_n (4));
image_endian_swap (image);
@@ -230,7 +230,7 @@ test_glyphs (int testnum, int verbose)
int n_glyphs, i;
pixman_glyph_cache_t *cache;
- lcg_srand (testnum);
+ prng_srand (testnum);
cache = pixman_glyph_cache_create ();
@@ -245,13 +245,13 @@ test_glyphs (int testnum, int verbose)
pixman_glyph_cache_freeze (cache);
- n_glyphs = lcg_rand_n (MAX_GLYPHS);
+ n_glyphs = prng_rand_n (MAX_GLYPHS);
for (i = 0; i < n_glyphs; ++i)
glyph_images[i] = create_image (32, glyph_formats, 0);
for (i = 0; i < 4 * n_glyphs; ++i)
{
- int g = lcg_rand_n (n_glyphs);
+ int g = prng_rand_n (n_glyphs);
pixman_image_t *glyph_img = glyph_images[g];
void *key1 = KEY1 (glyph_img);
void *key2 = KEY2 (glyph_img);
@@ -264,21 +264,21 @@ test_glyphs (int testnum, int verbose)
}
glyphs[i].glyph = glyph;
- glyphs[i].x = lcg_rand_n (128);
- glyphs[i].y = lcg_rand_n (128);
+ glyphs[i].x = prng_rand_n (128);
+ glyphs[i].y = prng_rand_n (128);
}
- if (lcg_rand_n (2) == 0)
+ if (prng_rand_n (2) == 0)
{
- int src_x = lcg_rand_n (300) - 150;
- int src_y = lcg_rand_n (300) - 150;
- int mask_x = lcg_rand_n (64) - 32;
- int mask_y = lcg_rand_n (64) - 32;
- int dest_x = lcg_rand_n (64) - 32;
- int dest_y = lcg_rand_n (64) - 32;
- int width = lcg_rand_n (64);
- int height = lcg_rand_n (64);
- pixman_op_t op = operators[lcg_rand_n (ARRAY_LENGTH (operators))];
+ int src_x = prng_rand_n (300) - 150;
+ int src_y = prng_rand_n (300) - 150;
+ int mask_x = prng_rand_n (64) - 32;
+ int mask_y = prng_rand_n (64) - 32;
+ int dest_x = prng_rand_n (64) - 32;
+ int dest_y = prng_rand_n (64) - 32;
+ int width = prng_rand_n (64);
+ int height = prng_rand_n (64);
+ pixman_op_t op = operators[prng_rand_n (ARRAY_LENGTH (operators))];
pixman_format_code_t format = random_format (glyph_formats);
pixman_composite_glyphs (
@@ -292,11 +292,11 @@ test_glyphs (int testnum, int verbose)
}
else
{
- pixman_op_t op = operators[lcg_rand_n (ARRAY_LENGTH (operators))];
- int src_x = lcg_rand_n (300) - 150;
- int src_y = lcg_rand_n (300) - 150;
- int dest_x = lcg_rand_n (64) - 32;
- int dest_y = lcg_rand_n (64) - 32;
+ pixman_op_t op = operators[prng_rand_n (ARRAY_LENGTH (operators))];
+ int src_x = prng_rand_n (300) - 150;
+ int src_y = prng_rand_n (300) - 150;
+ int dest_x = prng_rand_n (64) - 32;
+ int dest_y = prng_rand_n (64) - 32;
pixman_composite_glyphs_no_mask (
op, source, dest,
diff --git a/test/region-contains-test.c b/test/region-contains-test.c
index 9524e28..aca24ad 100644
--- a/test/region-contains-test.c
+++ b/test/region-contains-test.c
@@ -9,16 +9,16 @@ make_random_region (pixman_region32_t *region)
pixman_region32_init (region);
- n_boxes = lcg_rand_n (64);
+ n_boxes = prng_rand_n (64);
while (n_boxes--)
{
int32_t x, y;
uint32_t w, h;
- x = (int32_t)lcg_rand_u32() >> 2;
- y = (int32_t)lcg_rand_u32() >> 2;
- w = lcg_rand_u32() >> 2;
- h = lcg_rand_u32() >> 2;
+ x = (int32_t)prng_rand_u32() >> 2;
+ y = (int32_t)prng_rand_u32() >> 2;
+ w = prng_rand_u32() >> 2;
+ h = prng_rand_u32() >> 2;
pixman_region32_union_rect (region, region, x, y, w, h);
}
@@ -37,12 +37,12 @@ random_coord (pixman_region32_t *region, pixman_bool_t x)
int n_boxes;
int begin, end;
- if (lcg_rand_n (14))
+ if (prng_rand_n (14))
{
bb = pixman_region32_rectangles (region, &n_boxes);
if (n_boxes == 0)
goto use_extent;
- b = bb + lcg_rand_n (n_boxes);
+ b = bb + prng_rand_n (n_boxes);
}
else
{
@@ -62,12 +62,12 @@ random_coord (pixman_region32_t *region, pixman_bool_t x)
end = b->y2;
}
- switch (lcg_rand_n (5))
+ switch (prng_rand_n (5))
{
case 0:
- return begin - lcg_rand_u32();
+ return begin - prng_rand_u32();
case 1:
- return end + lcg_rand_u32 ();
+ return end + prng_rand_u32 ();
case 2:
return end;
case 3:
@@ -111,14 +111,14 @@ test_region_contains_rectangle (int i, int verbose)
pixman_region32_t region;
uint32_t r, r1, r2, r3, r4, crc32;
- lcg_srand (i);
+ prng_srand (i);
make_random_region (®ion);
box.x1 = random_coord (®ion, TRUE);
- box.x2 = box.x1 + lcg_rand_u32 ();
+ box.x2 = box.x1 + prng_rand_u32 ();
box.y1 = random_coord (®ion, FALSE);
- box.y2 = box.y1 + lcg_rand_u32 ();
+ box.y2 = box.y1 + prng_rand_u32 ();
if (verbose)
{
diff --git a/test/region-test.c b/test/region-test.c
index 9d5a41e..87010f7 100644
--- a/test/region-test.c
+++ b/test/region-test.c
@@ -91,10 +91,10 @@ main ()
/* Add some random rectangles */
for (j = 0; j < 64; j++)
pixman_region32_union_rect (&r1, &r1,
- lcg_rand_n (image_size),
- lcg_rand_n (image_size),
- lcg_rand_n (25),
- lcg_rand_n (25));
+ prng_rand_n (image_size),
+ prng_rand_n (image_size),
+ prng_rand_n (25),
+ prng_rand_n (25));
/* Clip to image size */
pixman_region32_init_rect (&r2, 0, 0, image_size, image_size);
diff --git a/test/rotate-test.c b/test/rotate-test.c
index a0488ef..0fe9301 100644
--- a/test/rotate-test.c
+++ b/test/rotate-test.c
@@ -43,13 +43,13 @@ static const pixman_transform_t transforms[] =
};
#define RANDOM_FORMAT() \
- (formats[lcg_rand_n (ARRAY_LENGTH (formats))])
+ (formats[prng_rand_n (ARRAY_LENGTH (formats))])
#define RANDOM_OP() \
- (ops[lcg_rand_n (ARRAY_LENGTH (ops))])
+ (ops[prng_rand_n (ARRAY_LENGTH (ops))])
#define RANDOM_TRANSFORM() \
- (&(transforms[lcg_rand_n (ARRAY_LENGTH (transforms))]))
+ (&(transforms[prng_rand_n (ARRAY_LENGTH (transforms))]))
static void
on_destroy (pixman_image_t *image, void *data)
@@ -66,7 +66,7 @@ make_image (void)
int i;
for (i = 0; i < WIDTH * HEIGHT * 4; ++i)
- ((uint8_t *)bytes)[i] = lcg_rand_n (256);
+ ((uint8_t *)bytes)[i] = prng_rand_n (256);
image = pixman_image_create_bits (
format, WIDTH, HEIGHT, bytes, WIDTH * 4);
@@ -86,7 +86,7 @@ test_transform (int testnum, int verbose)
pixman_image_t *src, *dest;
uint32_t crc;
- lcg_srand (testnum);
+ prng_srand (testnum);
src = make_image ();
dest = make_image ();
diff --git a/test/scaling-helpers-test.c b/test/scaling-helpers-test.c
index 33ec47c..a706020 100644
--- a/test/scaling-helpers-test.c
+++ b/test/scaling-helpers-test.c
@@ -56,10 +56,10 @@ main (void)
{
int32_t left_pad1, left_tz1, width1, right_tz1, right_pad1;
int32_t left_pad2, left_tz2, width2, right_tz2, right_pad2;
- pixman_fixed_t vx = lcg_rand_N(10000 << 16) - (3000 << 16);
- int32_t width = lcg_rand_N(10000);
- int32_t source_image_width = lcg_rand_N(10000) + 1;
- pixman_fixed_t unit_x = lcg_rand_N(10 << 16) + 1;
+ pixman_fixed_t vx = prng_rand_N(10000 << 16) - (3000 << 16);
+ int32_t width = prng_rand_N(10000);
+ int32_t source_image_width = prng_rand_N(10000) + 1;
+ pixman_fixed_t unit_x = prng_rand_N(10 << 16) + 1;
width1 = width2 = width;
bilinear_pad_repeat_get_scanline_bounds_ref (source_image_width,
diff --git a/test/scaling-test.c b/test/scaling-test.c
index 0354103..cfe9b52 100644
--- a/test/scaling-test.c
+++ b/test/scaling-test.c
@@ -26,7 +26,7 @@ get_format (int bpp)
{
if (bpp == 4)
{
- switch (lcg_rand_n (4))
+ switch (prng_rand_n (4))
{
default:
case 0:
@@ -80,11 +80,11 @@ test_composite (int testnum,
uint32_t crc32;
FLOAT_REGS_CORRUPTION_DETECTOR_START ();
- lcg_srand (testnum);
+ prng_srand (testnum);
- src_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
- dst_bpp = (lcg_rand_n (2) == 0) ? 2 : 4;
- switch (lcg_rand_n (3))
+ src_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+ dst_bpp = (prng_rand_n (2) == 0) ? 2 : 4;
+ switch (prng_rand_n (3))
{
case 0:
op = PIXMAN_OP_SRC;
@@ -97,24 +97,24 @@ test_composite (int testnum,
break;
}
- src_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
- src_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
+ src_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
+ src_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
- if (lcg_rand_n (2))
+ if (prng_rand_n (2))
{
- mask_width = lcg_rand_n (MAX_SRC_WIDTH) + 1;
- mask_height = lcg_rand_n (MAX_SRC_HEIGHT) + 1;
+ mask_width = prng_rand_n (MAX_SRC_WIDTH) + 1;
+ mask_height = prng_rand_n (MAX_SRC_HEIGHT) + 1;
}
else
{
mask_width = mask_height = 1;
}
- dst_width = lcg_rand_n (MAX_DST_WIDTH) + 1;
- dst_height = lcg_rand_n (MAX_DST_HEIGHT) + 1;
- src_stride = src_width * src_bpp + lcg_rand_n (MAX_STRIDE) * src_bpp;
- mask_stride = mask_width * mask_bpp + lcg_rand_n (MAX_STRIDE) * mask_bpp;
- dst_stride = dst_width * dst_bpp + lcg_rand_n (MAX_STRIDE) * dst_bpp;
+ dst_width = prng_rand_n (MAX_DST_WIDTH) + 1;
+ dst_height = prng_rand_n (MAX_DST_HEIGHT) + 1;
+ src_stride = src_width * src_bpp + prng_rand_n (MAX_STRIDE) * src_bpp;
+ mask_stride = mask_width * mask_bpp + prng_rand_n (MAX_STRIDE) * mask_bpp;
+ dst_stride = dst_width * dst_bpp + prng_rand_n (MAX_STRIDE) * dst_bpp;
if (src_stride & 3)
src_stride += 2;
@@ -127,27 +127,27 @@ test_composite (int testnum,
if (dst_stride & 3)
dst_stride += 2;
- src_x = -(src_width / 4) + lcg_rand_n (src_width * 3 / 2);
- src_y = -(src_height / 4) + lcg_rand_n (src_height * 3 / 2);
- mask_x = -(mask_width / 4) + lcg_rand_n (mask_width * 3 / 2);
- mask_y = -(mask_height / 4) + lcg_rand_n (mask_height * 3 / 2);
- dst_x = -(dst_width / 4) + lcg_rand_n (dst_width * 3 / 2);
- dst_y = -(dst_height / 4) + lcg_rand_n (dst_height * 3 / 2);
- w = lcg_rand_n (dst_width * 3 / 2 - dst_x);
- h = lcg_rand_n (dst_height * 3 / 2 - dst_y);
+ src_x = -(src_width / 4) + prng_rand_n (src_width * 3 / 2);
+ src_y = -(src_height / 4) + prng_rand_n (src_height * 3 / 2);
+ mask_x = -(mask_width / 4) + prng_rand_n (mask_width * 3 / 2);
+ mask_y = -(mask_height / 4) + prng_rand_n (mask_height * 3 / 2);
+ dst_x = -(dst_width / 4) + prng_rand_n (dst_width * 3 / 2);
+ dst_y = -(dst_height / 4) + prng_rand_n (dst_height * 3 / 2);
+ w = prng_rand_n (dst_width * 3 / 2 - dst_x);
+ h = prng_rand_n (dst_height * 3 / 2 - dst_y);
srcbuf = (uint32_t *)malloc (src_stride * src_height);
maskbuf = (uint32_t *)malloc (mask_stride * mask_height);
dstbuf = (uint32_t *)malloc (dst_stride * dst_height);
for (i = 0; i < src_stride * src_height; i++)
- *((uint8_t *)srcbuf + i) = lcg_rand_n (256);
+ *((uint8_t *)srcbuf + i) = prng_rand_n (256);
for (i = 0; i < mask_stride * mask_height; i++)
- *((uint8_t *)maskbuf + i) = lcg_rand_n (256);
+ *((uint8_t *)maskbuf + i) = prng_rand_n (256);
for (i = 0; i < dst_stride * dst_height; i++)
- *((uint8_t *)dstbuf + i) = lcg_rand_n (256);
+ *((uint8_t *)dstbuf + i) = prng_rand_n (256);
src_fmt = get_format (src_bpp);
dst_fmt = get_format (dst_bpp);
@@ -164,29 +164,29 @@ test_composite (int testnum,
image_endian_swap (src_img);
image_endian_swap (dst_img);
- if (lcg_rand_n (4) > 0)
+ if (prng_rand_n (4) > 0)
{
- scale_x = -32768 * 3 + lcg_rand_N (65536 * 5);
- scale_y = -32768 * 3 + lcg_rand_N (65536 * 5);
- translate_x = lcg_rand_N (65536);
- translate_y = lcg_rand_N (65536);
+ scale_x = -32768 * 3 + prng_rand_N (65536 * 5);
+ scale_y = -32768 * 3 + prng_rand_N (65536 * 5);
+ translate_x = prng_rand_N (65536);
+ translate_y = prng_rand_N (65536);
pixman_transform_init_scale (&transform, scale_x, scale_y);
pixman_transform_translate (&transform, NULL, translate_x, translate_y);
pixman_image_set_transform (src_img, &transform);
}
- if (lcg_rand_n (2) > 0)
+ if (prng_rand_n (2) > 0)
{
- mask_scale_x = -32768 * 3 + lcg_rand_N (65536 * 5);
- mask_scale_y = -32768 * 3 + lcg_rand_N (65536 * 5);
- mask_translate_x = lcg_rand_N (65536);
- mask_translate_y = lcg_rand_N (65536);
+ mask_scale_x = -32768 * 3 + prng_rand_N (65536 * 5);
+ mask_scale_y = -32768 * 3 + prng_rand_N (65536 * 5);
+ mask_translate_x = prng_rand_N (65536);
+ mask_translate_y = prng_rand_N (65536);
pixman_transform_init_scale (&transform, mask_scale_x, mask_scale_y);
pixman_transform_translate (&transform, NULL, mask_translate_x, mask_translate_y);
pixman_image_set_transform (mask_img, &transform);
}
- switch (lcg_rand_n (4))
+ switch (prng_rand_n (4))
{
case 0:
mask_repeat = PIXMAN_REPEAT_NONE;
@@ -209,7 +209,7 @@ test_composite (int testnum,
}
pixman_image_set_repeat (mask_img, mask_repeat);
- switch (lcg_rand_n (4))
+ switch (prng_rand_n (4))
{
case 0:
repeat = PIXMAN_REPEAT_NONE;
@@ -232,12 +232,12 @@ test_composite (int testnum,
}
pixman_image_set_repeat (src_img, repeat);
- if (lcg_rand_n (2))
+ if (prng_rand_n (2))
pixman_image_set_filter (src_img, PIXMAN_FILTER_NEAREST, NULL, 0);
else
pixman_image_set_filter (src_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
- if (lcg_rand_n (2))
+ if (prng_rand_n (2))
pixman_image_set_filter (mask_img, PIXMAN_FILTER_NEAREST, NULL, 0);
else
pixman_image_set_filter (mask_img, PIXMAN_FILTER_BILINEAR, NULL, 0);
@@ -256,19 +256,19 @@ test_composite (int testnum,
printf ("w=%d, h=%d\n", w, h);
}
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
- int n = lcg_rand_n (2) + 1;
+ int n = prng_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (src_width);
- clip_boxes[i].y1 = lcg_rand_n (src_height);
+ clip_boxes[i].x1 = prng_rand_n (src_width);
+ clip_boxes[i].y1 = prng_rand_n (src_height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (src_width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (src_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (src_height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (src_height - clip_boxes[i].y1);
if (verbose)
{
@@ -284,19 +284,19 @@ test_composite (int testnum,
pixman_region_fini (&clip);
}
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
- int n = lcg_rand_n (2) + 1;
+ int n = prng_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (mask_width);
- clip_boxes[i].y1 = lcg_rand_n (mask_height);
+ clip_boxes[i].x1 = prng_rand_n (mask_width);
+ clip_boxes[i].y1 = prng_rand_n (mask_height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (mask_width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (mask_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (mask_height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (mask_height - clip_boxes[i].y1);
if (verbose)
{
@@ -312,18 +312,18 @@ test_composite (int testnum,
pixman_region_fini (&clip);
}
- if (lcg_rand_n (8) == 0)
+ if (prng_rand_n (8) == 0)
{
pixman_box16_t clip_boxes[2];
- int n = lcg_rand_n (2) + 1;
+ int n = prng_rand_n (2) + 1;
for (i = 0; i < n; i++)
{
- clip_boxes[i].x1 = lcg_rand_n (dst_width);
- clip_boxes[i].y1 = lcg_rand_n (dst_height);
+ clip_boxes[i].x1 = prng_rand_n (dst_width);
+ clip_boxes[i].y1 = prng_rand_n (dst_height);
clip_boxes[i].x2 =
- clip_boxes[i].x1 + lcg_rand_n (dst_width - clip_boxes[i].x1);
+ clip_boxes[i].x1 + prng_rand_n (dst_width - clip_boxes[i].x1);
clip_boxes[i].y2 =
- clip_boxes[i].y1 + lcg_rand_n (dst_height - clip_boxes[i].y1);
+ clip_boxes[i].y1 + prng_rand_n (dst_height - clip_boxes[i].y1);
if (verbose)
{
@@ -337,7 +337,7 @@ test_composite (int testnum,
pixman_region_fini (&clip);
}
- if (lcg_rand_n (2) == 0)
+ if (prng_rand_n (2) == 0)
pixman_image_composite (op, src_img, NULL, dst_img,
src_x, src_y, 0, 0, dst_x, dst_y, w, h);
else
diff --git a/test/stress-test.c b/test/stress-test.c
index 059250d..8b99904 100644
--- a/test/stress-test.c
+++ b/test/stress-test.c
@@ -74,7 +74,7 @@ static pixman_filter_t filters[] =
static int
get_size (void)
{
- switch (lcg_rand_n (28))
+ switch (prng_rand_n (28))
{
case 0:
return 1;
@@ -84,10 +84,10 @@ get_size (void)
default:
case 2:
- return lcg_rand_n (100);
+ return prng_rand_n (100);
case 4:
- return lcg_rand_n (2000) + 1000;
+ return prng_rand_n (2000) + 1000;
case 5:
return 65535;
@@ -96,7 +96,7 @@ get_size (void)
return 65536;
case 7:
- return lcg_rand_N (64000) + 63000;
+ return prng_rand_N (64000) + 63000;
}
}
@@ -164,7 +164,7 @@ real_writer (void *src, uint32_t value, int size)
static uint32_t
fake_reader (const void *src, int size)
{
- uint32_t r = lcg_rand_u32 ();
+ uint32_t r = prng_rand_u32 ();
assert (size == 1 || size == 2 || size == 4);
@@ -182,16 +182,16 @@ log_rand (void)
{
uint32_t mask;
- mask = (1 << lcg_rand_n (10)) - 1;
+ mask = (1 << prng_rand_n (10)) - 1;
- return (lcg_rand_u32 () & mask) - (mask >> 1);
+ return (prng_rand_u32 () & mask) - (mask >> 1);
}
static int32_t
rand_x (pixman_image_t *image)
{
if (image->type == BITS)
- return lcg_rand_n (image->bits.width);
+ return prng_rand_n (image->bits.width);
else
return log_rand ();
}
@@ -200,7 +200,7 @@ static int32_t
rand_y (pixman_image_t *image)
{
if (image->type == BITS)
- return lcg_rand_n (image->bits.height);
+ return prng_rand_n (image->bits.height);
else
return log_rand ();
}
@@ -220,7 +220,7 @@ create_random_bits_image (void)
int n_coefficients = 0;
/* format */
- format = image_formats[lcg_rand_n (ARRAY_LENGTH (image_formats))];
+ format = image_formats[prng_rand_n (ARRAY_LENGTH (image_formats))];
indexed = NULL;
if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_COLOR)
@@ -246,7 +246,7 @@ create_random_bits_image (void)
while ((uint64_t)width * height > 200000)
{
- if (lcg_rand_n(2) == 0)
+ if (prng_rand_n(2) == 0)
height = 200000 / width;
else
width = 200000 / height;
@@ -258,11 +258,11 @@ create_random_bits_image (void)
width = 1;
/* bits */
- switch (lcg_rand_n (7))
+ switch (prng_rand_n (7))
{
default:
case 0:
- stride = width * PIXMAN_FORMAT_BPP (format) + lcg_rand_n (17);
+ stride = width * PIXMAN_FORMAT_BPP (format) + prng_rand_n (17);
stride = (stride + 3) & (~3);
bits = (uint32_t *)make_random_bytes (height * stride);
break;
@@ -273,7 +273,7 @@ create_random_bits_image (void)
break;
case 2: /* Zero-filled */
- stride = width * PIXMAN_FORMAT_BPP (format) + lcg_rand_n (17);
+ stride = width * PIXMAN_FORMAT_BPP (format) + prng_rand_n (17);
stride = (stride + 3) & (~3);
bits = fence_malloc (height * stride);
if (!bits)
@@ -282,7 +282,7 @@ create_random_bits_image (void)
break;
case 3: /* Filled with 0xFF */
- stride = width * PIXMAN_FORMAT_BPP (format) + lcg_rand_n (17);
+ stride = width * PIXMAN_FORMAT_BPP (format) + prng_rand_n (17);
stride = (stride + 3) & (~3);
bits = fence_malloc (height * stride);
if (!bits)
@@ -298,7 +298,7 @@ create_random_bits_image (void)
break;
case 5: /* bits is a real pointer, has read/write functions */
- stride = width * PIXMAN_FORMAT_BPP (format) + lcg_rand_n (17);
+ stride = width * PIXMAN_FORMAT_BPP (format) + prng_rand_n (17);
stride = (stride + 3) & (~3);
bits = fence_malloc (height * stride);
if (!bits)
@@ -309,7 +309,7 @@ create_random_bits_image (void)
break;
case 6: /* bits is a real pointer, stride is negative */
- stride = (width * PIXMAN_FORMAT_BPP (format) + lcg_rand_n (17));
+ stride = (width * PIXMAN_FORMAT_BPP (format) + prng_rand_n (17));
stride = (stride + 3) & (~3);
bits = (uint32_t *)make_random_bytes (height * stride);
if (!bits)
@@ -320,11 +320,11 @@ create_random_bits_image (void)
}
/* Filter */
- filter = filters[lcg_rand_n (ARRAY_LENGTH (filters))];
+ filter = filters[prng_rand_n (ARRAY_LENGTH (filters))];
if (filter == PIXMAN_FILTER_CONVOLUTION)
{
- int width = lcg_rand_n (3);
- int height = lcg_rand_n (4);
+ int width = prng_rand_n (3);
+ int height = prng_rand_n (4);
n_coefficients = width * height + 2;
coefficients = malloc (n_coefficients * sizeof (pixman_fixed_t));
@@ -334,7 +334,7 @@ create_random_bits_image (void)
int i;
for (i = 0; i < width * height; ++i)
- coefficients[i + 2] = lcg_rand_u32();
+ coefficients[i + 2] = prng_rand_u32();
coefficients[0] = width << 16;
coefficients[1] = height << 16;
@@ -380,11 +380,11 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
/* Set properties that are generic to all images */
/* Repeat */
- repeat = repeats[lcg_rand_n (ARRAY_LENGTH (repeats))];
+ repeat = repeats[prng_rand_n (ARRAY_LENGTH (repeats))];
pixman_image_set_repeat (image, repeat);
/* Alpha map */
- if (allow_alpha_map && lcg_rand_n (4) == 0)
+ if (allow_alpha_map && prng_rand_n (4) == 0)
{
pixman_image_t *alpha_map;
int16_t x, y;
@@ -405,17 +405,17 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
}
/* Component alpha */
- pixman_image_set_component_alpha (image, lcg_rand_n (3) == 0);
+ pixman_image_set_component_alpha (image, prng_rand_n (3) == 0);
/* Clip region */
- if (lcg_rand_n (8) < 2)
+ if (prng_rand_n (8) < 2)
{
pixman_region32_t region;
int i, n_rects;
pixman_region32_init (®ion);
- switch (lcg_rand_n (12))
+ switch (prng_rand_n (12))
{
case 0:
n_rects = 0;
@@ -434,7 +434,7 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
break;
default:
- n_rects = lcg_rand_n (100);
+ n_rects = prng_rand_n (100);
break;
}
@@ -452,7 +452,7 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
®ion, ®ion, x, y, width, height);
}
- if (image->type == BITS && lcg_rand_n (8) != 0)
+ if (image->type == BITS && prng_rand_n (8) != 0)
{
uint32_t width, height;
int x, y;
@@ -463,10 +463,10 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
*/
for (i = 0; i < 5; ++i)
{
- x = lcg_rand_n (2 * image->bits.width) - image->bits.width;
- y = lcg_rand_n (2 * image->bits.height) - image->bits.height;
- width = lcg_rand_n (image->bits.width) - x + 10;
- height = lcg_rand_n (image->bits.height) - y + 10;
+ x = prng_rand_n (2 * image->bits.width) - image->bits.width;
+ y = prng_rand_n (2 * image->bits.height) - image->bits.height;
+ width = prng_rand_n (image->bits.width) - x + 10;
+ height = prng_rand_n (image->bits.height) - y + 10;
if (width + x < x)
width = INT32_MAX - x;
@@ -484,13 +484,13 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
}
/* Whether source clipping is enabled */
- pixman_image_set_source_clipping (image, !!lcg_rand_n (2));
+ pixman_image_set_source_clipping (image, !!prng_rand_n (2));
/* Client clip */
- pixman_image_set_has_client_clip (image, !!lcg_rand_n (2));
+ pixman_image_set_has_client_clip (image, !!prng_rand_n (2));
/* Transform */
- if (lcg_rand_n (5) < 2)
+ if (prng_rand_n (5) < 2)
{
pixman_transform_t xform;
int i, j, k;
@@ -504,39 +504,39 @@ set_general_properties (pixman_image_t *image, pixman_bool_t allow_alpha_map)
for (k = 0; k < 3; ++k)
{
- switch (lcg_rand_n (4))
+ switch (prng_rand_n (4))
{
case 0:
/* rotation */
- c = lcg_rand_N (2 * 65536) - 65536;
- s = lcg_rand_N (2 * 65536) - 65536;
+ c = prng_rand_N (2 * 65536) - 65536;
+ s = prng_rand_N (2 * 65536) - 65536;
pixman_transform_rotate (&xform, NULL, c, s);
break;
case 1:
/* translation */
- tx = lcg_rand_u32();
- ty = lcg_rand_u32();
+ tx = prng_rand_u32();
+ ty = prng_rand_u32();
pixman_transform_translate (&xform, NULL, tx, ty);
break;
case 2:
/* scale */
- sx = lcg_rand_u32();
- sy = lcg_rand_u32();
+ sx = prng_rand_u32();
+ sy = prng_rand_u32();
pixman_transform_scale (&xform, NULL, sx, sy);
break;
case 3:
- if (lcg_rand_n (16) == 0)
+ if (prng_rand_n (16) == 0)
{
/* random */
for (i = 0; i < 3; ++i)
for (j = 0; j < 3; ++j)
- xform.matrix[i][j] = lcg_rand_u32();
+ xform.matrix[i][j] = prng_rand_u32();
break;
}
- else if (lcg_rand_n (16) == 0)
+ else if (prng_rand_n (16) == 0)
{
/* zero */
memset (&xform, 0, sizeof xform);
@@ -554,10 +554,10 @@ random_color (void)
{
pixman_color_t color =
{
- lcg_rand() & 0xffff,
- lcg_rand() & 0xffff,
- lcg_rand() & 0xffff,
- lcg_rand() & 0xffff,
+ prng_rand() & 0xffff,
+ prng_rand() & 0xffff,
+ prng_rand() & 0xffff,
+ prng_rand() & 0xffff,
};
return color;
@@ -581,7 +581,7 @@ create_random_stops (int *n_stops)
int i;
pixman_gradient_stop_t *stops;
- *n_stops = lcg_rand_n (50) + 1;
+ *n_stops = prng_rand_n (50) + 1;
step = pixman_fixed_1 / *n_stops;
@@ -646,8 +646,8 @@ create_random_radial_image (void)
inner_c = create_random_point();
outer_c = create_random_point();
- inner_r = lcg_rand();
- outer_r = lcg_rand();
+ inner_r = prng_rand();
+ outer_r = prng_rand();
stops = create_random_stops (&n_stops);
@@ -672,7 +672,7 @@ create_random_conical_image (void)
pixman_image_t *result;
c = create_random_point();
- angle = lcg_rand();
+ angle = prng_rand();
stops = create_random_stops (&n_stops);
@@ -691,7 +691,7 @@ create_random_image (void)
{
pixman_image_t *result;
- switch (lcg_rand_n (5))
+ switch (prng_rand_n (5))
{
default:
case 0:
@@ -793,7 +793,7 @@ run_test (uint32_t seed, pixman_bool_t verbose, uint32_t mod)
printf ("Seed 0x%08x\n", seed);
}
- lcg_srand (seed);
+ prng_srand (seed);
source = create_random_image ();
mask = create_random_image ();
@@ -803,7 +803,7 @@ run_test (uint32_t seed, pixman_bool_t verbose, uint32_t mod)
{
set_general_properties (dest, TRUE);
- op = op_list [lcg_rand_n (ARRAY_LENGTH (op_list))];
+ op = op_list [prng_rand_n (ARRAY_LENGTH (op_list))];
pixman_image_composite32 (op,
source, mask, dest,
diff --git a/test/utils.c b/test/utils.c
index 00e74e5..c82ba2b 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -30,7 +30,7 @@
/* Random number seed
*/
-uint32_t lcg_seed;
+uint32_t prng_seed;
/*----------------------------------------------------------------------------*\
* CRC-32 version 2.0.0 by Craig Bruce, 2006-04-29.
@@ -429,7 +429,7 @@ make_random_bytes (int n_bytes)
return NULL;
for (i = 0; i < n_bytes; ++i)
- bytes[i] = lcg_rand () & 0xff;
+ bytes[i] = prng_rand () & 0xff;
return bytes;
}
@@ -681,9 +681,9 @@ get_random_seed (void)
{
union { double d; uint32_t u32; } t;
t.d = gettime();
- lcg_srand (t.u32);
+ prng_srand (t.u32);
- return lcg_rand_u32 ();
+ return prng_rand_u32 ();
}
#ifdef HAVE_SIGACTION
@@ -777,7 +777,7 @@ initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb)
uint32_t mask = (1 << depth) - 1;
for (i = 0; i < 32768; ++i)
- palette->ent[i] = lcg_rand() & mask;
+ palette->ent[i] = prng_rand() & mask;
memset (palette->rgba, 0, sizeof (palette->rgba));
@@ -797,7 +797,7 @@ initialize_palette (pixman_indexed_t *palette, uint32_t depth, int is_rgb)
{
uint32_t old_idx;
- rgba24 = lcg_rand();
+ rgba24 = prng_rand();
i15 = CONVERT_15 (rgba24, is_rgb);
old_idx = palette->ent[i15];
diff --git a/test/utils.h b/test/utils.h
index fa05587..ec4c4ad 100644
--- a/test/utils.h
+++ b/test/utils.h
@@ -11,47 +11,47 @@
* taken from POSIX.1-2001 example
*/
-extern uint32_t lcg_seed;
+extern uint32_t prng_seed;
#ifdef USE_OPENMP
-#pragma omp threadprivate(lcg_seed)
+#pragma omp threadprivate(prng_seed)
#endif
static inline uint32_t
-lcg_rand (void)
+prng_rand (void)
{
- lcg_seed = lcg_seed * 1103515245 + 12345;
- return ((uint32_t)(lcg_seed / 65536) % 32768);
+ prng_seed = prng_seed * 1103515245 + 12345;
+ return ((uint32_t)(prng_seed / 65536) % 32768);
}
static inline void
-lcg_srand (uint32_t seed)
+prng_srand (uint32_t seed)
{
- lcg_seed = seed;
+ prng_seed = seed;
}
static inline uint32_t
-lcg_rand_n (int max)
+prng_rand_n (int max)
{
- return lcg_rand () % max;
+ return prng_rand () % max;
}
static inline uint32_t
-lcg_rand_N (int max)
+prng_rand_N (int max)
{
- uint32_t lo = lcg_rand ();
- uint32_t hi = lcg_rand () << 15;
+ uint32_t lo = prng_rand ();
+ uint32_t hi = prng_rand () << 15;
return (lo | hi) % max;
}
static inline uint32_t
-lcg_rand_u32 (void)
+prng_rand_u32 (void)
{
/* This uses the 10/11 most significant bits from the 3 lcg results
* (and mixes them with the low from the adjacent one).
*/
- uint32_t lo = lcg_rand() >> -(32 - 15 - 11 * 2);
- uint32_t mid = lcg_rand() << (32 - 15 - 11 * 1);
- uint32_t hi = lcg_rand() << (32 - 15 - 11 * 0);
+ uint32_t lo = prng_rand() >> -(32 - 15 - 11 * 2);
+ uint32_t mid = prng_rand() << (32 - 15 - 11 * 1);
+ uint32_t hi = prng_rand() << (32 - 15 - 11 * 0);
return (hi ^ mid ^ lo);
}
commit d6545a2fc6f65c4959c6f85a15e95675347c0940
Author: Siarhei Siamashka <siarhei.siamashka at gmail.com>
Date: Sat Nov 24 19:43:41 2012 +0200
test: Added a better PRNG (pseudorandom number generator)
This adds a fast SIMD-optimized variant of a small noncryptographic
PRNG originally developed by Bob Jenkins:
http://www.burtleburtle.net/bob/rand/smallprng.html
The generated pseudorandom data is good enough to pass "Big Crush"
tests from TestU01 (http://en.wikipedia.org/wiki/TestU01).
SIMD code uses http://gcc.gnu.org/onlinedocs/gcc/Vector-Extensions.html
which is a GCC specific extension. There is also a slower alternative
code path, which should work with any C compiler.
The performance of filling buffer with random data:
Intel Core i7 @2.8GHz (SSE2) : ~5.9 GB/s
ARM Cortex-A15 @1.7GHz (NEON) : ~2.2 GB/s
IBM Cell PPU @3.2GHz (Altivec) : ~1.7 GB/s
diff --git a/test/Makefile.sources b/test/Makefile.sources
index 0778971..8c0b505 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -1,5 +1,6 @@
# Tests (sorted by expected completion time)
TESTPROGRAMS = \
+ prng-test \
a1-trap-test \
pdf-op-test \
region-test \
@@ -33,8 +34,10 @@ BENCHMARKS = \
# Utility functions
libutils_sources = \
utils.c \
+ utils-prng.c \
$(NULL)
libutils_headers = \
utils.h \
+ utils-prng.h \
$(NULL)
diff --git a/test/prng-test.c b/test/prng-test.c
new file mode 100644
index 0000000..0a3ad5e
--- /dev/null
+++ b/test/prng-test.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright © 2012 Siarhei Siamashka <siarhei.siamashka at gmail.com>
+ *
+ * Based on the public domain implementation of small noncryptographic PRNG
+ * authored by Bob Jenkins: http://burtleburtle.net/bob/rand/smallprng.html
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include "utils-prng.h"
+#include "utils.h"
+
+/* The original code from http://www.burtleburtle.net/bob/rand/smallprng.html */
+
+typedef uint32_t u4;
+typedef struct ranctx { u4 a; u4 b; u4 c; u4 d; } ranctx;
+
+#define rot(x,k) (((x)<<(k))|((x)>>(32-(k))))
+u4 ranval( ranctx *x ) {
+ u4 e = x->a - rot(x->b, 27);
+ x->a = x->b ^ rot(x->c, 17);
+ x->b = x->c + x->d;
+ x->c = x->d + e;
+ x->d = e + x->a;
+ return x->d;
+}
+
+void raninit( ranctx *x, u4 seed ) {
+ u4 i;
+ x->a = 0xf1ea5eed, x->b = x->c = x->d = seed;
+ for (i=0; i<20; ++i) {
+ (void)ranval(x);
+ }
+}
+
+/*****************************************************************************/
+
+#define BUFSIZE (8 * 1024 * 1024)
+#define N 50
+
+void bench (void)
+{
+ double t1, t2;
+ int i;
+ prng_t prng;
+ uint8_t *buf = aligned_malloc (16, BUFSIZE + 1);
+
+ prng_srand_r (&prng, 1234);
+ t1 = gettime();
+ for (i = 0; i < N; i++)
+ prng_randmemset_r (&prng, buf, BUFSIZE, 0);
+ t2 = gettime();
+ printf ("aligned randmemset : %.2f MB/s\n",
+ (double)BUFSIZE * N / 1000000. / (t2 - t1));
+
+ t1 = gettime();
+ for (i = 0; i < N; i++)
+ prng_randmemset_r (&prng, buf + 1, BUFSIZE, 0);
+ t2 = gettime();
+ printf ("unaligned randmemset : %.2f MB/s\n",
+ (double)BUFSIZE * N / 1000000. / (t2 - t1));
+
+ t1 = gettime();
+ for (i = 0; i < N; i++)
+ {
+ prng_randmemset_r (&prng, buf, BUFSIZE, RANDMEMSET_MORE_00_AND_FF);
+ }
+ t2 = gettime ();
+ printf ("aligned randmemset (more 00 and FF) : %.2f MB/s\n",
+ (double)BUFSIZE * N / 1000000. / (t2 - t1));
+
+ t1 = gettime();
+ for (i = 0; i < N; i++)
+ {
+ prng_randmemset_r (&prng, buf + 1, BUFSIZE, RANDMEMSET_MORE_00_AND_FF);
+ }
+ t2 = gettime ();
+ printf ("unaligned randmemset (more 00 and FF) : %.2f MB/s\n",
+ (double)BUFSIZE * N / 1000000. / (t2 - t1));
+
+ free (buf);
+}
+
+#define SMALLBUFSIZE 100
+
+int main (int argc, char *argv[])
+{
+ const uint32_t ref_crc[RANDMEMSET_MORE_00_AND_FF + 1] =
+ {
+ 0xBA06763D, 0x103FC550, 0x8B59ABA5, 0xD82A0F39
+ };
+ uint32_t crc1, crc2;
+ uint32_t ref, seed, seed0, seed1, seed2, seed3;
+ prng_rand_128_data_t buf;
+ uint8_t *bytebuf = aligned_malloc(16, SMALLBUFSIZE + 1);
+ ranctx x;
+ prng_t prng;
+ prng_randmemset_flags_t flags;
+
+ if (argc > 1 && strcmp(argv[1], "-bench") == 0)
+ {
+ bench ();
+ return 0;
+ }
+
+ /* basic test */
+ raninit (&x, 0);
+ prng_srand_r (&prng, 0);
+ assert (ranval (&x) == prng_rand_r (&prng));
+
+ /* test for simd code */
+ seed = 0;
+ prng_srand_r (&prng, seed);
+ seed0 = (seed = seed * 1103515245 + 12345);
+ seed1 = (seed = seed * 1103515245 + 12345);
+ seed2 = (seed = seed * 1103515245 + 12345);
+ seed3 = (seed = seed * 1103515245 + 12345);
+ prng_rand_128_r (&prng, &buf);
+
+ raninit (&x, seed0);
+ ref = ranval (&x);
+ assert (ref == buf.w[0]);
+
+ raninit (&x, seed1);
+ ref = ranval (&x);
+ assert (ref == buf.w[1]);
+
+ raninit (&x, seed2);
+ ref = ranval (&x);
+ assert (ref == buf.w[2]);
+
+ raninit (&x, seed3);
+ ref = ranval (&x);
+ assert (ref == buf.w[3]);
+
+ /* test for randmemset */
+ for (flags = 0; flags <= RANDMEMSET_MORE_00_AND_FF; flags++)
+ {
+ prng_srand_r (&prng, 1234);
+ prng_randmemset_r (&prng, bytebuf, 16, flags);
+ prng_randmemset_r (&prng, bytebuf + 16, SMALLBUFSIZE - 17, flags);
+ crc1 = compute_crc32 (0, bytebuf, SMALLBUFSIZE - 1);
+ prng_srand_r (&prng, 1234);
+ prng_randmemset_r (&prng, bytebuf + 1, SMALLBUFSIZE - 1, flags);
+ crc2 = compute_crc32 (0, bytebuf + 1, SMALLBUFSIZE - 1);
+ assert (ref_crc[flags] == crc1);
+ assert (ref_crc[flags] == crc2);
+ }
+
+ free (bytebuf);
+
+ return 0;
+}
diff --git a/test/utils-prng.c b/test/utils-prng.c
new file mode 100644
index 0000000..7c2dd6a
--- /dev/null
+++ b/test/utils-prng.c
@@ -0,0 +1,238 @@
+/*
+ * Copyright © 2012 Siarhei Siamashka <siarhei.siamashka at gmail.com>
+ *
+ * Based on the public domain implementation of small noncryptographic PRNG
+ * authored by Bob Jenkins: http://burtleburtle.net/bob/rand/smallprng.html
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include "utils.h"
+#include "utils-prng.h"
+
+void smallprng_srand_r (smallprng_t *x, uint32_t seed)
+{
+ uint32_t i;
+ x->a = 0xf1ea5eed, x->b = x->c = x->d = seed;
+ for (i = 0; i < 20; ++i)
+ smallprng_rand_r (x);
+}
+
+/*
+ * Set a 32-bit seed for PRNG
+ *
+ * LCG is used here for generating independent seeds for different
+ * smallprng instances (in the case if smallprng is also used for
+ * generating these seeds, "Big Crush" test from TestU01 detects
+ * some problems in the glued 'prng_rand_128_r' output data).
+ * Actually we might be even better using some cryptographic
+ * hash for this purpose, but LCG seems to be also enough for
+ * passing "Big Crush".
+ */
+void prng_srand_r (prng_t *x, uint32_t seed)
+{
+#ifdef GCC_VECTOR_EXTENSIONS_SUPPORTED
+ int i;
+ prng_rand_128_data_t dummy;
+ smallprng_srand_r (&x->p0, seed);
+ x->a[0] = x->a[1] = x->a[2] = x->a[3] = 0xf1ea5eed;
+ x->b[0] = x->c[0] = x->d[0] = (seed = seed * 1103515245 + 12345);
+ x->b[1] = x->c[1] = x->d[1] = (seed = seed * 1103515245 + 12345);
+ x->b[2] = x->c[2] = x->d[2] = (seed = seed * 1103515245 + 12345);
+ x->b[3] = x->c[3] = x->d[3] = (seed = seed * 1103515245 + 12345);
+ for (i = 0; i < 20; ++i)
+ prng_rand_128_r (x, &dummy);
+#else
+ smallprng_srand_r (&x->p0, seed);
+ smallprng_srand_r (&x->p1, (seed = seed * 1103515245 + 12345));
+ smallprng_srand_r (&x->p2, (seed = seed * 1103515245 + 12345));
+ smallprng_srand_r (&x->p3, (seed = seed * 1103515245 + 12345));
+ smallprng_srand_r (&x->p4, (seed = seed * 1103515245 + 12345));
+#endif
+}
+
+static force_inline void
+store_rand_128_data (void *addr, prng_rand_128_data_t *d, int aligned)
+{
+#ifdef GCC_VECTOR_EXTENSIONS_SUPPORTED
+ if (aligned)
+ {
+ *(uint8x16 *)addr = d->vb;
+ return;
+ }
+#endif
+ /* we could try something better for unaligned writes (packed attribute),
+ * but GCC is not very reliable: http://gcc.gnu.org/PR55454 */
+ memcpy (addr, d, 16);
+}
+
+/*
+ * Helper function and the actual code for "prng_randmemset_r" function
+ */
+static force_inline void
+randmemset_internal (prng_t *prng,
+ uint8_t *buf,
+ size_t size,
+ prng_randmemset_flags_t flags,
+ int aligned)
+{
+ prng_t local_prng = *prng;
+ prng_rand_128_data_t randdata;
+
+ while (size >= 16)
+ {
+ prng_rand_128_data_t t;
+ if (flags == 0)
+ {
+ prng_rand_128_r (&local_prng, &randdata);
+ }
+ else
+ {
+ prng_rand_128_r (&local_prng, &t);
+ prng_rand_128_r (&local_prng, &randdata);
+#ifdef GCC_VECTOR_EXTENSIONS_SUPPORTED
+ if (flags & RANDMEMSET_MORE_FF)
+ {
+ const uint8x16 const_C0 =
+ {
+ 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0,
+ 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0
+ };
+ randdata.vb |= (t.vb >= const_C0);
+ }
+ if (flags & RANDMEMSET_MORE_00)
+ {
+ const uint8x16 const_40 =
+ {
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40
+ };
+ randdata.vb &= (t.vb >= const_40);
+ }
+#else
+ #define PROCESS_ONE_LANE(i) \
+ if (flags & RANDMEMSET_MORE_FF) \
+ { \
+ uint32_t mask_ff = (t.w[i] & (t.w[i] << 1)) & 0x80808080; \
+ mask_ff |= mask_ff >> 1; \
+ mask_ff |= mask_ff >> 2; \
+ mask_ff |= mask_ff >> 4; \
+ randdata.w[i] |= mask_ff; \
+ } \
+ if (flags & RANDMEMSET_MORE_00) \
+ { \
+ uint32_t mask_00 = (t.w[i] | (t.w[i] << 1)) & 0x80808080; \
+ mask_00 |= mask_00 >> 1; \
+ mask_00 |= mask_00 >> 2; \
+ mask_00 |= mask_00 >> 4; \
+ randdata.w[i] &= mask_00; \
+ }
+
+ PROCESS_ONE_LANE (0)
+ PROCESS_ONE_LANE (1)
+ PROCESS_ONE_LANE (2)
+ PROCESS_ONE_LANE (3)
+#endif
+ }
+ if (is_little_endian ())
+ {
+ store_rand_128_data (buf, &randdata, aligned);
+ buf += 16;
+ }
+ else
+ {
+#ifdef GCC_VECTOR_EXTENSIONS_SUPPORTED
+ const uint8x16 bswap_shufflemask =
+ {
+ 3, 2, 1, 0, 7, 6, 5, 4, 11, 10, 9, 8, 15, 14, 13, 12
+ };
+ randdata.vb = __builtin_shuffle (randdata.vb, bswap_shufflemask);
+ store_rand_128_data (buf, &randdata, aligned);
+ buf += 16;
+#else
+ uint8_t t1, t2, t3, t4;
+ #define STORE_ONE_LANE(i) \
+ t1 = randdata.b[i * 4 + 3]; \
+ t2 = randdata.b[i * 4 + 2]; \
+ t3 = randdata.b[i * 4 + 1]; \
+ t4 = randdata.b[i * 4 + 0]; \
+ *buf++ = t1; \
+ *buf++ = t2; \
+ *buf++ = t3; \
+ *buf++ = t4;
+
+ STORE_ONE_LANE (0)
+ STORE_ONE_LANE (1)
+ STORE_ONE_LANE (2)
+ STORE_ONE_LANE (3)
+#endif
+ }
+ size -= 16;
+ }
+ while (size > 0)
+ {
+ uint8_t randbyte = prng_rand_r (&local_prng) & 0xFF;
+ if (flags != 0)
+ {
+ uint8_t t = prng_rand_r (&local_prng) & 0xFF;
+ if ((flags & RANDMEMSET_MORE_FF) && (t >= 0xC0))
+ randbyte = 0xFF;
+ if ((flags & RANDMEMSET_MORE_00) && (t < 0x40))
+ randbyte = 0x00;
+ }
+ *buf++ = randbyte;
+ size--;
+ }
+ *prng = local_prng;
+}
+
+/*
+ * Fill memory buffer with random data. Flags argument may be used
+ * to tweak some statistics properties:
+ * RANDMEMSET_MORE_00 - set ~25% of bytes to 0x00
+ * RANDMEMSET_MORE_FF - set ~25% of bytes to 0xFF
+ */
+void prng_randmemset_r (prng_t *prng,
+ void *voidbuf,
+ size_t size,
+ prng_randmemset_flags_t flags)
+{
+ uint8_t *buf = (uint8_t *)voidbuf;
+ if ((uintptr_t)buf & 15)
+ {
+ /* unaligned buffer */
+ if (flags == 0)
+ randmemset_internal (prng, buf, size, 0, 0);
+ else if (flags == RANDMEMSET_MORE_00_AND_FF)
+ randmemset_internal (prng, buf, size, RANDMEMSET_MORE_00_AND_FF, 0);
+ else
+ randmemset_internal (prng, buf, size, flags, 0);
+ }
+ else
+ {
+ /* aligned buffer */
+ if (flags == 0)
+ randmemset_internal (prng, buf, size, 0, 1);
+ else if (flags == RANDMEMSET_MORE_00_AND_FF)
+ randmemset_internal (prng, buf, size, RANDMEMSET_MORE_00_AND_FF, 1);
+ else
+ randmemset_internal (prng, buf, size, flags, 1);
+ }
+}
diff --git a/test/utils-prng.h b/test/utils-prng.h
new file mode 100644
index 0000000..285107f
--- /dev/null
+++ b/test/utils-prng.h
@@ -0,0 +1,168 @@
+/*
+ * Copyright © 2012 Siarhei Siamashka <siarhei.siamashka at gmail.com>
+ *
+ * Based on the public domain implementation of small noncryptographic PRNG
+ * authored by Bob Jenkins: http://burtleburtle.net/bob/rand/smallprng.html
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __UTILS_PRNG_H__
+#define __UTILS_PRNG_H__
+
+/*
+ * This file provides a fast SIMD-optimized noncryptographic PRNG (pseudorandom
+ * number generator), with the output good enough to pass "Big Crush" tests
+ * from TestU01 (http://en.wikipedia.org/wiki/TestU01).
+ *
+ * SIMD code uses http://gcc.gnu.org/onlinedocs/gcc/Vector-Extensions.html
+ * which is a GCC specific extension. There is also a slower alternative
+ * code path, which should work with any C compiler.
+ *
+ * The "prng_t" structure keeps the internal state of the random number
+ * generator. It is possible to have multiple instances of the random number
+ * generator active at the same time, in this case each of them needs to have
+ * its own "prng_t". All the functions take a pointer to "prng_t"
+ * as the first argument.
+ *
+ * Functions:
+ *
+ * ----------------------------------------------------------------------------
+ * void prng_srand_r (prng_t *prng, uint32_t seed);
+ *
+ * Initialize the pseudorandom number generator. The sequence of preudorandom
+ * numbers is deterministic and only depends on "seed". Any two generators
+ * initialized with the same seed will produce exactly the same sequence.
+ *
+ * ----------------------------------------------------------------------------
+ * uint32_t prng_rand_r (prng_t *prng);
+ *
+ * Generate a single uniformly distributed 32-bit pseudorandom value.
+ *
+ * ----------------------------------------------------------------------------
+ * void prng_randmemset_r (prng_t *prng,
+ * void *buffer,
+ * size_t size,
+ * prng_randmemset_flags_t flags);
+ *
+ * Fills the memory buffer "buffer" with "size" bytes of pseudorandom data.
+ * The "flags" argument may be used to tweak some statistics properties:
+ * RANDMEMSET_MORE_00 - set ~25% of bytes to 0x00
+ * RANDMEMSET_MORE_FF - set ~25% of bytes to 0xFF
+ * The flags can be combined. This allows a bit better simulation of typical
+ * pixel data, which normally contains a lot of fully transparent or fully
+ * opaque pixels.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "pixman-private.h"
+
+/*****************************************************************************/
+
+#if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
+#define GCC_VECTOR_EXTENSIONS_SUPPORTED
+typedef uint32_t uint32x4 __attribute__ ((vector_size(16)));
+typedef uint8_t uint8x16 __attribute__ ((vector_size(16)));
+#endif
+
+typedef struct
+{
+ uint32_t a, b, c, d;
+} smallprng_t;
+
+typedef struct
+{
+#ifdef GCC_VECTOR_EXTENSIONS_SUPPORTED
+ uint32x4 a, b, c, d;
+#else
+ smallprng_t p1, p2, p3, p4;
+#endif
+ smallprng_t p0;
+} prng_t;
+
+typedef union
+{
+ uint8_t b[16];
+ uint32_t w[4];
+#ifdef GCC_VECTOR_EXTENSIONS_SUPPORTED
+ uint8x16 vb;
+ uint32x4 vw;
+#endif
+} prng_rand_128_data_t;
+
+/*****************************************************************************/
+
+static force_inline uint32_t
+smallprng_rand_r (smallprng_t *x)
+{
+ uint32_t e = x->a - ((x->b << 27) + (x->b >> (32 - 27)));
+ x->a = x->b ^ ((x->c << 17) ^ (x->c >> (32 - 17)));
+ x->b = x->c + x->d;
+ x->c = x->d + e;
+ x->d = e + x->a;
+ return x->d;
+}
+
+/* Generate 4 bytes (32-bits) of random data */
+static force_inline uint32_t
+prng_rand_r (prng_t *x)
+{
+ return smallprng_rand_r (&x->p0);
+}
+
+/* Generate 16 bytes (128-bits) of random data */
+static force_inline void
+prng_rand_128_r (prng_t *x, prng_rand_128_data_t *data)
+{
+#ifdef GCC_VECTOR_EXTENSIONS_SUPPORTED
+ uint32x4 e = x->a - ((x->b << 27) + (x->b >> (32 - 27)));
+ x->a = x->b ^ ((x->c << 17) ^ (x->c >> (32 - 17)));
+ x->b = x->c + x->d;
+ x->c = x->d + e;
+ x->d = e + x->a;
+ data->vw = x->d;
+#else
+ data->w[0] = smallprng_rand_r (&x->p1);
+ data->w[1] = smallprng_rand_r (&x->p2);
+ data->w[2] = smallprng_rand_r (&x->p3);
+ data->w[3] = smallprng_rand_r (&x->p4);
+#endif
+}
+
+typedef enum
+{
+ RANDMEMSET_MORE_00 = 1, /* ~25% chance for 0x00 bytes */
+ RANDMEMSET_MORE_FF = 2, /* ~25% chance for 0xFF bytes */
+ RANDMEMSET_MORE_00_AND_FF = (RANDMEMSET_MORE_00 | RANDMEMSET_MORE_FF)
+} prng_randmemset_flags_t;
+
+/* Set the 32-bit seed for PRNG */
+void prng_srand_r (prng_t *prng, uint32_t seed);
+
+/* Fill memory buffer with random data */
+void prng_randmemset_r (prng_t *prng,
+ void *buffer,
+ size_t size,
+ prng_randmemset_flags_t flags);
+
+#endif
commit 41f98a07fc3235b64713a39238238801304ac346
Author: Siarhei Siamashka <siarhei.siamashka at gmail.com>
Date: Fri Nov 23 09:07:23 2012 +0200
test: Change is_little_endian() into inline function
Also dropped redundant volatile keyword because any object
can be accessed via char* pointer without breaking aliasing
rules. The compilers are able to optimize this function to either
constant 0 or 1.
diff --git a/test/utils.c b/test/utils.c
index c887a6d..00e74e5 100644
--- a/test/utils.c
+++ b/test/utils.c
@@ -237,14 +237,6 @@ compute_crc32_for_image (uint32_t crc32,
return crc32;
}
-pixman_bool_t
-is_little_endian (void)
-{
- volatile uint16_t endian_check_var = 0x1234;
-
- return (*(volatile uint8_t *)&endian_check_var == 0x34);
-}
-
/* perform endian conversion of pixel data
*/
void
diff --git a/test/utils.h b/test/utils.h
index f7ea34c..fa05587 100644
--- a/test/utils.h
+++ b/test/utils.h
@@ -69,8 +69,12 @@ compute_crc32_for_image (uint32_t in_crc32,
/* Returns TRUE if running on a little endian system
*/
-pixman_bool_t
-is_little_endian (void);
+static force_inline pixman_bool_t
+is_little_endian (void)
+{
+ unsigned long endian_check_var = 1;
+ return *(unsigned char *)&endian_check_var == 1;
+}
/* perform endian conversion of pixel data
*/
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