void emitSetVarargsFrame(CCallHelpers& jit, GPRReg lengthGPR, bool lengthIncludesThis, GPRReg numUsedSlotsGPR, GPRReg resultGPR)
{
jit.move(numUsedSlotsGPR, resultGPR);
// We really want to make sure the size of the new call frame is a multiple of
// stackAlignmentRegisters(), however it is easier to accomplish this by
// rounding numUsedSlotsGPR to the next multiple of stackAlignmentRegisters().
// Together with the rounding below, we will assure that the new call frame is
// located on a stackAlignmentRegisters() boundary and a multiple of
// stackAlignmentRegisters() in size.
jit.addPtr(CCallHelpers::TrustedImm32(stackAlignmentRegisters() - 1), resultGPR);
jit.andPtr(CCallHelpers::TrustedImm32(~(stackAlignmentRegisters() - 1)), resultGPR);
jit.addPtr(lengthGPR, resultGPR);
jit.addPtr(CCallHelpers::TrustedImm32(JSStack::CallFrameHeaderSize + (lengthIncludesThis? 0 : 1)), resultGPR);
// resultGPR now has the required frame size in Register units
// Round resultGPR to next multiple of stackAlignmentRegisters()
jit.addPtr(CCallHelpers::TrustedImm32(stackAlignmentRegisters() - 1), resultGPR);
jit.andPtr(CCallHelpers::TrustedImm32(~(stackAlignmentRegisters() - 1)), resultGPR);
// Now resultGPR has the right stack frame offset in Register units.
jit.negPtr(resultGPR);
jit.lshiftPtr(CCallHelpers::Imm32(3), resultGPR);
jit.addPtr(GPRInfo::callFrameRegister, resultGPR);
}
void emitSetVarargsFrame(CCallHelpers& jit, GPRReg lengthGPR, bool lengthIncludesThis, GPRReg numUsedSlotsGPR, GPRReg resultGPR)
{
jit.move(numUsedSlotsGPR, resultGPR);
jit.addPtr(lengthGPR, resultGPR);
jit.addPtr(CCallHelpers::TrustedImm32(JSStack::CallFrameHeaderSize + (lengthIncludesThis? 0 : 1)), resultGPR);
// resultGPR now has the required frame size in Register units
// Round resultGPR to next multiple of stackAlignmentRegisters()
jit.addPtr(CCallHelpers::TrustedImm32(stackAlignmentRegisters() - 1), resultGPR);
jit.andPtr(CCallHelpers::TrustedImm32(~(stackAlignmentRegisters() - 1)), resultGPR);
// Now resultGPR has the right stack frame offset in Register units.
jit.negPtr(resultGPR);
jit.lshiftPtr(CCallHelpers::Imm32(3), resultGPR);
jit.addPtr(GPRInfo::callFrameRegister, resultGPR);
}
