r300/compiler: remove an unused-but-set variable and simplify the code
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2ce6c3ea6e
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@ -560,7 +560,7 @@ static int peephole_add_presub_add(
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struct radeon_compiler * c,
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struct rc_instruction * inst_add)
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{
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struct rc_src_register * src0 = NULL;
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unsigned dstmask = inst_add->U.I.DstReg.WriteMask;
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struct rc_src_register * src1 = NULL;
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unsigned int i;
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@ -570,18 +570,15 @@ static int peephole_add_presub_add(
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if (inst_add->U.I.SrcReg[0].Swizzle != inst_add->U.I.SrcReg[1].Swizzle)
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return 0;
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/* src0 and src1 can't have absolute values only one can be negative and they must be all negative or all positive. */
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/* XXX This isn't fully implemented, is it? */
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/* src0 and src1 can't have absolute values only one can be negative and they must be all negative or all positive. */
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for (i = 0; i < 2; i++) {
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if (inst_add->U.I.SrcReg[i].Abs)
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return 0;
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if ((inst_add->U.I.SrcReg[i].Negate
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& inst_add->U.I.DstReg.WriteMask) ==
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inst_add->U.I.DstReg.WriteMask) {
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src0 = &inst_add->U.I.SrcReg[i];
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} else if (!src1) {
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/* XXX This looks weird, but it's basically what was here before this commit (see git blame): */
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if ((inst_add->U.I.SrcReg[i].Negate & dstmask) != dstmask && !src1) {
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src1 = &inst_add->U.I.SrcReg[i];
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} else {
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src0 = &inst_add->U.I.SrcReg[i];
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}
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}
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