[Mesa-dev] [PATCH v2 2/3] i965: Add support for double-precision floating-point types on Gen8+.

[Darius Goad]

---
 src/mesa/drivers/dri/i965/brw_reg.h      |  1 +
 src/mesa/drivers/dri/i965/brw_shader.cpp | 19 +++++++++++++------
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_reg.h b/src/mesa/drivers/dri/i965/brw_reg.h
index 924b059..143a667 100644
--- a/src/mesa/drivers/dri/i965/brw_reg.h
+++ b/src/mesa/drivers/dri/i965/brw_reg.h
@@ -252,6 +252,7 @@ struct brw_reg {
       } bits;
 
       float f;
+      double df;
       int   d;
       unsigned ud;
    } dw1;
diff --git a/src/mesa/drivers/dri/i965/brw_shader.cpp b/src/mesa/drivers/dri/i965/brw_shader.cpp
index 7a5f7978..9bb3943 100644
--- a/src/mesa/drivers/dri/i965/brw_shader.cpp
+++ b/src/mesa/drivers/dri/i965/brw_shader.cpp
@@ -585,6 +585,7 @@ brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg)
       unsigned ud;
       int d;
       float f;
+      double df;
    } imm = { reg->dw1.ud }, sat_imm = { 0 };
 
    switch (type) {
@@ -603,6 +604,9 @@ brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg)
    case BRW_REGISTER_TYPE_F:
       sat_imm.f = CLAMP(imm.f, 0.0f, 1.0f);
       break;
+   case BRW_REGISTER_TYPE_DF:
+      sat_imm.df = CLAMP(imm.df, 0.0f, 1.0f);
+      break;
    case BRW_REGISTER_TYPE_UB:
    case BRW_REGISTER_TYPE_B:
       unreachable("no UB/B immediates");
@@ -610,9 +614,8 @@ brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg)
    case BRW_REGISTER_TYPE_UV:
    case BRW_REGISTER_TYPE_VF:
       unreachable("unimplemented: saturate vector immediate");
-   case BRW_REGISTER_TYPE_DF:
    case BRW_REGISTER_TYPE_HF:
-      unreachable("unimplemented: saturate DF/HF immediate");
+      unreachable("unimplemented: saturate -HF immediate");
    }
 
    if (imm.ud != sat_imm.ud) {
@@ -637,6 +640,9 @@ brw_negate_immediate(enum brw_reg_type type, struct brw_reg *reg)
    case BRW_REGISTER_TYPE_F:
       reg->dw1.f = -reg->dw1.f;
       return true;
+   case BRW_REGISTER_TYPE_DF:
+      reg->dw1.df = -reg->dw1.df;
+      return true;
    case BRW_REGISTER_TYPE_VF:
       reg->dw1.ud ^= 0x80808080;
       return true;
@@ -649,9 +655,8 @@ brw_negate_immediate(enum brw_reg_type type, struct brw_reg *reg)
    case BRW_REGISTER_TYPE_UQ:
    case BRW_REGISTER_TYPE_Q:
       assert(!"unimplemented: negate UQ/Q immediate");
-   case BRW_REGISTER_TYPE_DF:
    case BRW_REGISTER_TYPE_HF:
-      assert(!"unimplemented: negate DF/HF immediate");
+      assert(!"unimplemented: negate HF immediate");
    }
 
    return false;
@@ -670,6 +675,9 @@ brw_abs_immediate(enum brw_reg_type type, struct brw_reg *reg)
    case BRW_REGISTER_TYPE_F:
       reg->dw1.f = fabsf(reg->dw1.f);
       return true;
+   case BRW_REGISTER_TYPE_DF:
+      reg->dw1.df = fabsd(reg->dw1.df);
+      return true;
    case BRW_REGISTER_TYPE_VF:
       reg->dw1.ud &= ~0x80808080;
       return true;
@@ -688,9 +696,8 @@ brw_abs_immediate(enum brw_reg_type type, struct brw_reg *reg)
       assert(!"unimplemented: abs V immediate");
    case BRW_REGISTER_TYPE_Q:
       assert(!"unimplemented: abs Q immediate");
-   case BRW_REGISTER_TYPE_DF:
    case BRW_REGISTER_TYPE_HF:
-      assert(!"unimplemented: abs DF/HF immediate");
+      assert(!"unimplemented: abs HF immediate");
    }
 
    return false;
-- 
2.1.4