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spirv: Fix SpvOpFwidth, SpvOpFwidthFine and SpvOpFwidthCoarse

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"Result is the same as computing the sum of the absolute values of
    OpDPdx and OpDPdy on P."

We were doing sum of absolute values of OpDPdx of P and OpDPdx of NULL.
This commit is contained in:
Kristian Høgsberg Kristensen
2016-02-17 15:28:52 -08:00
parent ae3e249d57
commit b8da261dc7
1 changed files with 3 additions and 3 deletions
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6
src/compiler/nir/spirv/vtn_alu.c
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@@ -404,17 +404,17 @@ vtn_handle_alu(struct vtn_builder *b, SpvOp opcode,
case SpvOpFwidth: case SpvOpFwidth:
val->ssa->def = nir_fadd(&b->nb, val->ssa->def = nir_fadd(&b->nb,
nir_fabs(&b->nb, nir_fddx(&b->nb, src[0])), nir_fabs(&b->nb, nir_fddx(&b->nb, src[0])),
nir_fabs(&b->nb, nir_fddx(&b->nb, src[1]))); nir_fabs(&b->nb, nir_fddy(&b->nb, src[0])));
return; return;
case SpvOpFwidthFine: case SpvOpFwidthFine:
val->ssa->def = nir_fadd(&b->nb, val->ssa->def = nir_fadd(&b->nb,
nir_fabs(&b->nb, nir_fddx_fine(&b->nb, src[0])), nir_fabs(&b->nb, nir_fddx_fine(&b->nb, src[0])),
nir_fabs(&b->nb, nir_fddx_fine(&b->nb, src[1]))); nir_fabs(&b->nb, nir_fddy_fine(&b->nb, src[0])));
return; return;
case SpvOpFwidthCoarse: case SpvOpFwidthCoarse:
val->ssa->def = nir_fadd(&b->nb, val->ssa->def = nir_fadd(&b->nb,
nir_fabs(&b->nb, nir_fddx_coarse(&b->nb, src[0])), nir_fabs(&b->nb, nir_fddx_coarse(&b->nb, src[0])),
nir_fabs(&b->nb, nir_fddx_coarse(&b->nb, src[1]))); nir_fabs(&b->nb, nir_fddy_coarse(&b->nb, src[0])));
return; return;
case SpvOpVectorTimesScalar: case SpvOpVectorTimesScalar: