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swr: [rasterizer jit] use signed integer representation for logic op

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Instead of (incorrectly) biasing the snorm value to make it look like a
unorm, just use signed integer math.

This fixes arb_color_buffer_float-render GL_RGBA8_SNORM

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Tim Rowley <timothy.o.rowley@intel.com>
This commit is contained in:
Ilia Mirkin 2016-11-24 18:02:31 -05:00
parent 8ed703cfa6
commit ddf0f097e7
1 changed files with 12 additions and 5 deletions
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17
src/gallium/drivers/swr/rasterizer/jitter/blend_jit.cpp
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@ -692,9 +692,13 @@ struct BlendJit : public Builder
dst[i] = BITCAST(dst[i], mSimdInt32Ty);
break;
case SWR_TYPE_SNORM:
src[i] = FADD(src[i], VIMMED1(0.5f));
dst[i] = FADD(dst[i], VIMMED1(0.5f));
/* fallthrough */
src[i] = FP_TO_SI(
FMUL(src[i], VIMMED1(scale[i])),
mSimdInt32Ty);
dst[i] = FP_TO_SI(
FMUL(dst[i], VIMMED1(scale[i])),
mSimdInt32Ty);
break;
case SWR_TYPE_UNORM:
src[i] = FP_TO_UI(
FMUL(src[i], VIMMED1(scale[i])),
@ -728,11 +732,14 @@ struct BlendJit : public Builder
result[i] = BITCAST(result[i], mSimdFP32Ty);
break;
case SWR_TYPE_SNORM:
result[i] = SHL(result[i], C(32 - info.bpc[i]));
result[i] = ASHR(result[i], C(32 - info.bpc[i]));
result[i] = FMUL(SI_TO_FP(result[i], mSimdFP32Ty),
VIMMED1(1.0f / scale[i]));
break;
case SWR_TYPE_UNORM:
result[i] = FMUL(UI_TO_FP(result[i], mSimdFP32Ty),
VIMMED1(1.0f / scale[i]));
if (info.type[i] == SWR_TYPE_SNORM)
result[i] = FADD(result[i], VIMMED1(-0.5f));
break;
}