[Mesa-dev] [PATCH v2] ac: fix texture query LOD for 1D textures on GFX9

[Samuel Pitoiset]

1D textures are allocated as 2D which means we only need
one coordinate for texture query LOD.

v2: - move the fixup into ac_nir_to_llvm

Fixes: 625dcbbc456 ("amd/common: pass address components individually to
ac_build_image_intrinsic")
Cc: 18.1 <mesa-stable at lists.freedesktop.org>
Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/amd/common/ac_nir_to_llvm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 900c1c4afea..e4ae6ef49ad 100644
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -1309,6 +1309,14 @@ static LLVMValueRef build_tex_intrinsic(struct ac_nir_context *ctx,
 		}
 	}
 
+	/* Fixup for GFX9 which allocates 1D textures as 2D. */
+	if (instr->op == nir_texop_lod && ctx->ac.chip_class >= GFX9) {
+		if ((args->dim == ac_image_2darray ||
+		     args->dim == ac_image_2d) && !args->coords[1]) {
+			args->coords[1] = ctx->ac.i32_0;
+		}
+	}
+
 	args->attributes = AC_FUNC_ATTR_READNONE;
 	return ac_build_image_opcode(&ctx->ac, args);
 }
-- 
2.17.0