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nir: Fix constant evaluation of bfm.

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NIR's bfm, like Intel/AMD's hardware instructions and GLSL IR's
ir_binop_bfm takes <bits> as src0 and <offset> as src1.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
This commit is contained in:
Matt Turner 2016-01-11 12:13:24 -08:00
parent 7dc2e5f940
commit 92f1773869
1 changed files with 1 additions and 1 deletions
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2
src/glsl/nir/nir_opcodes.py
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@ -512,7 +512,7 @@ binop_horiz("pack_half_2x16_split", 1, tuint, 1, tfloat, 1, tfloat,
"pack_half_1x16(src0.x) | (pack_half_1x16(src1.x) << 16)")
binop_convert("bfm", tuint, tint, "", """
int offset = src0, bits = src1;
int bits = src0, offset = src1;
if (offset < 0 || bits < 0 || offset + bits > 32)
dst = 0; /* undefined per the spec */
else