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Unified Diff: src/ia32/lithium-ia32.cc

Issue 6461021: Add a genuine unary minus instruction to Crankshaft.... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 9 years, 10 months ago
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Index: src/ia32/lithium-ia32.cc
===================================================================
--- src/ia32/lithium-ia32.cc (revision 6698)
+++ src/ia32/lithium-ia32.cc (working copy)
@@ -1305,6 +1305,29 @@
}
+LInstruction* LChunkBuilder::DoNeg(HNeg* instr) {
+ Representation r = instr->representation();
+ if (r.IsInteger32()) {
+ LOperand* input = UseRegister(instr->value());
+ LNegI* result = new LNegI(input);
+ if (instr->CheckFlag(HValue::kBailoutOnMinusZero) ||
+ instr->CheckFlag(HValue::kCanOverflow)) {
+ AssignEnvironment(result);
+ }
+ return DefineSameAsFirst(result);
+ } else if (r.IsDouble()) {
+ LOperand* input = UseRegister(instr->value());
+ LOperand* temp = TempRegister();
+ return DefineSameAsFirst(new LNegD(input, temp));
+ } else {
+ ASSERT(r.IsTagged());
+ LOperand* input = UseFixed(instr->value(), eax);
+ LNegT* result = new LNegT(input);
+ return MarkAsCall(DefineFixed(result, eax), instr);
+ }
+}
+
+
LInstruction* LChunkBuilder::DoBitOr(HBitOr* instr) {
return DoBit(Token::BIT_OR, instr);
}
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