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ac/nir: do not clamp shadow reference on GFX10

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RadeonSI only uses Z32_FLOAT_CLAMP for upgraded depth textures
on GFX10 and RADV doesn't promotes Z16 or Z24.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset 2019-07-18 15:51:27 +02:00
parent 64b7386ee8
commit 6049745b13
1 changed files with 6 additions and 2 deletions
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8
src/amd/common/ac_nir_to_llvm.c
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@ -3805,12 +3805,16 @@ static void visit_tex(struct ac_nir_context *ctx, nir_tex_instr *instr)
/* TC-compatible HTILE on radeonsi promotes Z16 and Z24 to Z32_FLOAT,
* so the depth comparison value isn't clamped for Z16 and
* Z24 anymore. Do it manually here.
* Z24 anymore. Do it manually here for GFX8-9; GFX10 has an explicitly
* clamped 32-bit float format.
*
* It's unnecessary if the original texture format was
* Z32_FLOAT, but we don't know that here.
*/
if (args.compare && ctx->ac.chip_class >= GFX8 && ctx->abi->clamp_shadow_reference)
if (args.compare &&
ctx->ac.chip_class >= GFX8 &&
ctx->ac.chip_class <= GFX9 &&
ctx->abi->clamp_shadow_reference)
args.compare = ac_build_clamp(&ctx->ac, ac_to_float(&ctx->ac, args.compare));
/* pack derivatives */