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Unified Diff: src/ia32/full-codegen-ia32.cc

Issue 557016: Implement SUB and BIT_NOT unary operations in full codegenerator.... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 11 months ago
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Index: src/ia32/full-codegen-ia32.cc
===================================================================
--- src/ia32/full-codegen-ia32.cc (revision 3712)
+++ src/ia32/full-codegen-ia32.cc (working copy)
@@ -1470,6 +1470,44 @@
break;
}
+ case Token::SUB: {
+ Comment cmt(masm_, "[ UnaryOperation (SUB)");
+ bool overwrite =
+ (expr->expression()->AsBinaryOperation() != NULL &&
+ expr->expression()->AsBinaryOperation()->ResultOverwriteAllowed());
+ GenericUnaryOpStub stub(Token::SUB, overwrite);
+ // GenericUnaryOpStub expects the argument to be in the
+ // accumulator register eax.
+ VisitForValue(expr->expression(), kAccumulator);
+ __ CallStub(&stub);
+ Apply(context_, eax);
+ break;
+ }
+
+ case Token::BIT_NOT: {
+ Comment cmt(masm_, "[ UnaryOperation (BIT_NOT)");
+ bool overwrite =
+ (expr->expression()->AsBinaryOperation() != NULL &&
+ expr->expression()->AsBinaryOperation()->ResultOverwriteAllowed());
+ GenericUnaryOpStub stub(Token::BIT_NOT, overwrite);
+ // GenericUnaryOpStub expects the argument to be in the
+ // accumulator register eax.
+ VisitForValue(expr->expression(), kAccumulator);
+ // Avoid calling the stub for Smis.
+ Label smi, done;
+ __ test(result_register(), Immediate(kSmiTagMask));
+ __ j(zero, &smi);
+ // Non-smi: call stub leaving result in accumulator register.
+ __ CallStub(&stub);
+ __ jmp(&done);
+ // Perform operation directly on Smis.
+ __ bind(&smi);
+ __ not_(result_register());
+ __ and_(result_register(), ~kSmiTagMask); // Remove inverted smi-tag.
+ __ bind(&done);
+ Apply(context_, result_register());
+ }
+
default:
UNREACHABLE();
}
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