diff options
Diffstat (limited to 'js/src/jit/x86/MacroAssembler-x86.cpp')
| -rw-r--r-- | js/src/jit/x86/MacroAssembler-x86.cpp | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/js/src/jit/x86/MacroAssembler-x86.cpp b/js/src/jit/x86/MacroAssembler-x86.cpp index dc97b5b5b..429a71fa9 100644 --- a/js/src/jit/x86/MacroAssembler-x86.cpp +++ b/js/src/jit/x86/MacroAssembler-x86.cpp @@ -21,15 +21,6 @@ using namespace js; using namespace js::jit; -// vpunpckldq requires 16-byte boundary for memory operand. -// See convertUInt64ToDouble for the details. -MOZ_ALIGNED_DECL(static const uint64_t, 16) TO_DOUBLE[4] = { - 0x4530000043300000LL, - 0x0LL, - 0x4330000000000000LL, - 0x4530000000000000LL -}; - static const double TO_DOUBLE_HIGH_SCALE = 0x100000000; bool @@ -90,8 +81,16 @@ MacroAssemblerX86::convertUInt64ToDouble(Register64 src, FloatRegister dest, Reg // here, each 64-bit part of dest represents following double: // HI(dest) = 0x 1.00000HHHHHHHH * 2**84 == 2**84 + 0x HHHHHHHH 00000000 // LO(dest) = 0x 1.00000LLLLLLLL * 2**52 == 2**52 + 0x 00000000 LLLLLLLL - movePtr(ImmWord((uintptr_t)TO_DOUBLE), temp); - vpunpckldq(Operand(temp, 0), dest128, dest128); + // See convertUInt64ToDouble for the details. + static const int32_t CST1[4] = { + 0x43300000, + 0x45300000, + 0x0, + 0x0, + }; + + loadConstantSimd128Int(SimdConstant::CreateX4(CST1), ScratchSimd128Reg); + vpunpckldq(ScratchSimd128Reg, dest128, dest128); // Subtract a constant C2 from dest, for each 64-bit part: // C2 = 0x 45300000 00000000 43300000 00000000 @@ -101,7 +100,15 @@ MacroAssemblerX86::convertUInt64ToDouble(Register64 src, FloatRegister dest, Reg // after the operation each 64-bit part of dest represents following: // HI(dest) = double(0x HHHHHHHH 00000000) // LO(dest) = double(0x 00000000 LLLLLLLL) - vsubpd(Operand(temp, sizeof(uint64_t) * 2), dest128, dest128); + static const int32_t CST2[4] = { + 0x0, + 0x43300000, + 0x0, + 0x45300000, + }; + + loadConstantSimd128Int(SimdConstant::CreateX4(CST2), ScratchSimd128Reg); + vsubpd(ScratchSimd128Reg, dest128, dest128); // Add HI(dest) and LO(dest) in double and store it into LO(dest), // LO(dest) = double(0x HHHHHHHH 00000000) + double(0x 00000000 LLLLLLLL) |