diff options
Diffstat (limited to 'deps/v8/src/ia32/code-stubs-ia32.cc')
| -rw-r--r-- | deps/v8/src/ia32/code-stubs-ia32.cc | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/deps/v8/src/ia32/code-stubs-ia32.cc b/deps/v8/src/ia32/code-stubs-ia32.cc index 006ee46ed4..a9c3085bad 100644 --- a/deps/v8/src/ia32/code-stubs-ia32.cc +++ b/deps/v8/src/ia32/code-stubs-ia32.cc @@ -3499,10 +3499,12 @@ void MathPowStub::Generate(MacroAssembler* masm) { __ j(not_equal, ¬_minus_half); // Calculates reciprocal of square root. - // Note that 1/sqrt(x) = sqrt(1/x)) - __ divsd(xmm3, xmm0); - __ movsd(xmm1, xmm3); + // sqrtsd returns -0 when input is -0. ECMA spec requires +0. + __ xorpd(xmm1, xmm1); + __ addsd(xmm1, xmm0); __ sqrtsd(xmm1, xmm1); + __ divsd(xmm3, xmm1); + __ movsd(xmm1, xmm3); __ jmp(&allocate_return); // Test for 0.5. @@ -3514,7 +3516,9 @@ void MathPowStub::Generate(MacroAssembler* masm) { __ ucomisd(xmm2, xmm1); __ j(not_equal, &call_runtime); // Calculates square root. - __ movsd(xmm1, xmm0); + // sqrtsd returns -0 when input is -0. ECMA spec requires +0. + __ xorpd(xmm1, xmm1); + __ addsd(xmm1, xmm0); __ sqrtsd(xmm1, xmm1); __ bind(&allocate_return); |