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Fix floating point return values.

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This commit is contained in:
losfair
2020-03-10 03:16:22 +08:00
parent fc114ac671
commit 7e2ede3960
2 changed files with 92 additions and 16 deletions
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46
lib/singlepass-backend/src/codegen_x64.rs
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@ -205,6 +205,7 @@ pub struct X64FunctionCode {
signatures: Arc<Map<SigIndex, FuncSig>>,
function_signatures: Arc<Map<FuncIndex, SigIndex>>,
signature: FuncSig,
fsm: FunctionStateMap,
offset: usize,
@ -713,11 +714,22 @@ impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
machine.track_state = self.config.as_ref().unwrap().track_state;
assembler.emit_label(begin_label);
let signatures = self.signatures.as_ref().unwrap();
let function_signatures = self.function_signatures.as_ref().unwrap();
let sig_index = function_signatures
.get(FuncIndex::new(
self.functions.len() + self.func_import_count,
))
.unwrap()
.clone();
let sig = signatures.get(sig_index).unwrap().clone();
let code = X64FunctionCode {
local_function_id: self.functions.len(),
signatures: self.signatures.as_ref().unwrap().clone(),
function_signatures: self.function_signatures.as_ref().unwrap().clone(),
signatures: signatures.clone(),
function_signatures: function_signatures.clone(),
signature: sig,
fsm: FunctionStateMap::new(new_machine_state(), self.functions.len(), 32, vec![]), // only a placeholder; this is initialized later in `begin_body`
offset: begin_offset.0,
@ -6347,7 +6359,14 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
false,
)[0];
self.value_stack.push(ret);
a.emit_mov(Size::S64, Location::GPR(GPR::RAX), ret);
match return_types[0] {
WpType::F32 | WpType::F64 => {
a.emit_mov(Size::S64, Location::XMM(XMM::XMM0), ret);
}
_ => {
a.emit_mov(Size::S64, Location::GPR(GPR::RAX), ret);
}
}
}
}
Operator::CallIndirect { index, table_index } => {
@ -6486,7 +6505,14 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
false,
)[0];
self.value_stack.push(ret);
a.emit_mov(Size::S64, Location::GPR(GPR::RAX), ret);
match return_types[0] {
WpType::F32 | WpType::F64 => {
a.emit_mov(Size::S64, Location::XMM(XMM::XMM0), ret);
}
_ => {
a.emit_mov(Size::S64, Location::GPR(GPR::RAX), ret);
}
}
}
}
Operator::If { ty } => {
@ -7701,6 +7727,18 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
self.machine.finalize_locals(a, &self.locals);
a.emit_mov(Size::S64, Location::GPR(GPR::RBP), Location::GPR(GPR::RSP));
a.emit_pop(Size::S64, Location::GPR(GPR::RBP));
// Make a copy of the return value in XMM0, as required by the SysV CC.
match self.signature.returns() {
[x] if *x == Type::F32 || *x == Type::F64 => {
a.emit_mov(
Size::S64,
Location::GPR(GPR::RAX),
Location::XMM(XMM::XMM0),
);
}
_ => {}
}
a.emit_ret();
} else {
let released = &self.value_stack[frame.value_stack_depth..];