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i965/fp: Use the LRP instruction for OPCODE_LRP.

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Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner
2013-02-19 12:51:08 -08:00
parent 0a1d145e5f
commit f78a7ff6b2
1 changed files with 4 additions and 8 deletions
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src/mesa/drivers/dri/i965/brw_fs_fp.cpp
+4 -8
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@@ -316,14 +316,10 @@ fs_visitor::emit_fragment_program_code()
case OPCODE_LRP:
for (int i = 0; i < 4; i++) {
if (fpi->DstReg.WriteMask & (1 << i)) {
fs_reg neg_src0 = regoffset(src[0], i);
neg_src0.negate = !neg_src0.negate;
fs_reg temp = fs_reg(this, glsl_type::float_type);
fs_reg temp2 = fs_reg(this, glsl_type::float_type);
emit(ADD(temp, neg_src0, fs_reg(1.0f)));
emit(MUL(temp, temp, regoffset(src[2], i)));
emit(MUL(temp2, regoffset(src[0], i), regoffset(src[1], i)));
emit(ADD(regoffset(dst, i), temp, temp2));
fs_reg a = regoffset(src[0], i);
fs_reg y = regoffset(src[1], i);
fs_reg x = regoffset(src[2], i);
emit_lrp(regoffset(dst, i), x, y, a);
}
}
break;