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s390x: [baseline] implement EmitReturn

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Change-Id: I5771c13c6ba643164ebbdd9d0131a7618872dee3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3417501
Reviewed-by: Milad Farazmand <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#78789}
This commit is contained in:
Junliang Yan 2022-01-26 12:48:30 -05:00 committed by V8 LUCI CQ
parent 011da951a4
commit d484d44a34
1 changed files with 50 additions and 1 deletions
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51
src/baseline/s390/baseline-assembler-s390-inl.h
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@ -540,7 +540,56 @@ void BaselineAssembler::Switch(Register reg, int case_value_base,
#define __ basm.
void BaselineAssembler::EmitReturn(MacroAssembler* masm) { UNIMPLEMENTED(); }
void BaselineAssembler::EmitReturn(MacroAssembler* masm) {
ASM_CODE_COMMENT(masm);
BaselineAssembler basm(masm);
Register weight = BaselineLeaveFrameDescriptor::WeightRegister();
Register params_size = BaselineLeaveFrameDescriptor::ParamsSizeRegister();
{
ASM_CODE_COMMENT_STRING(masm, "Update Interrupt Budget");
Label skip_interrupt_label;
__ AddToInterruptBudgetAndJumpIfNotExceeded(weight, &skip_interrupt_label);
{
__ masm()->SmiTag(params_size);
__ Push(params_size, kInterpreterAccumulatorRegister);
__ LoadContext(kContextRegister);
__ LoadFunction(kJSFunctionRegister);
__ Push(kJSFunctionRegister);
__ CallRuntime(Runtime::kBytecodeBudgetInterruptFromBytecode, 1);
__ Pop(kInterpreterAccumulatorRegister, params_size);
__ masm()->SmiUntag(params_size);
}
__ Bind(&skip_interrupt_label);
}
BaselineAssembler::ScratchRegisterScope temps(&basm);
Register actual_params_size = temps.AcquireScratch();
// Compute the size of the actual parameters + receiver (in bytes).
__ Move(actual_params_size,
MemOperand(fp, StandardFrameConstants::kArgCOffset));
// If actual is bigger than formal, then we should use it to free up the stack
// arguments.
Label corrected_args_count;
JumpIfHelper(__ masm(), Condition::kGreaterThanEqual, params_size,
actual_params_size, &corrected_args_count);
__ masm()->mov(params_size, actual_params_size);
__ Bind(&corrected_args_count);
// Leave the frame (also dropping the register file).
__ masm()->LeaveFrame(StackFrame::BASELINE);
// Drop receiver + arguments.
__ masm()->DropArguments(params_size, TurboAssembler::kCountIsInteger,
TurboAssembler::kCountIncludesReceiver);
__ masm()->Ret();
}
#undef __