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Inline codegen_xgetbv into llvm_x86.rs

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This commit is contained in:
bjorn3 2023-11-11 19:59:42 +00:00
parent 9205667c0d
commit 2769ac03ba
2 changed files with 34 additions and 44 deletions
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45
src/inline_asm.rs
View File

@ -10,7 +10,7 @@ use target_lexicon::BinaryFormat;
use crate::prelude::*;
enum CInlineAsmOperand<'tcx> {
pub(crate) enum CInlineAsmOperand<'tcx> {
In {
reg: InlineAsmRegOrRegClass,
value: Value,
@ -146,7 +146,7 @@ pub(crate) fn codegen_inline_asm_terminator<'tcx>(
}
}
fn codegen_inline_asm_inner<'tcx>(
pub(crate) fn codegen_inline_asm_inner<'tcx>(
fx: &mut FunctionCx<'_, '_, 'tcx>,
template: &[InlineAsmTemplatePiece],
operands: &[CInlineAsmOperand<'tcx>],
@ -737,44 +737,3 @@ fn call_inline_asm<'tcx>(
place.write_cvalue(fx, CValue::by_val(value, place.layout()));
}
}
pub(crate) fn codegen_xgetbv<'tcx>(
fx: &mut FunctionCx<'_, '_, 'tcx>,
xcr_no: Value,
ret: CPlace<'tcx>,
) {
// FIXME add .eh_frame unwind info directives
let operands = vec![
CInlineAsmOperand::In {
reg: InlineAsmRegOrRegClass::Reg(InlineAsmReg::X86(X86InlineAsmReg::cx)),
value: xcr_no,
},
CInlineAsmOperand::Out {
reg: InlineAsmRegOrRegClass::Reg(InlineAsmReg::X86(X86InlineAsmReg::ax)),
late: true,
place: Some(ret),
},
CInlineAsmOperand::Out {
reg: InlineAsmRegOrRegClass::Reg(InlineAsmReg::X86(X86InlineAsmReg::dx)),
late: true,
place: None,
},
];
let options = InlineAsmOptions::NOSTACK | InlineAsmOptions::PURE | InlineAsmOptions::NOMEM;
codegen_inline_asm_inner(
fx,
&[InlineAsmTemplatePiece::String(
"
xgetbv
// out = rdx << 32 | rax
shl rdx, 32
or rax, rdx
"
.to_string(),
)],
&operands,
options,
);
}

33
src/intrinsics/llvm_x86.rs
View File

@ -1,7 +1,10 @@
//! Emulate x86 LLVM intrinsics
use rustc_ast::ast::{InlineAsmOptions, InlineAsmTemplatePiece};
use rustc_middle::ty::GenericArgsRef;
use rustc_target::asm::*;
use crate::inline_asm::{codegen_inline_asm_inner, CInlineAsmOperand};
use crate::intrinsics::*;
use crate::prelude::*;
@ -24,7 +27,35 @@ pub(crate) fn codegen_x86_llvm_intrinsic_call<'tcx>(
let xcr_no = xcr_no.load_scalar(fx);
crate::inline_asm::codegen_xgetbv(fx, xcr_no, ret);
codegen_inline_asm_inner(
fx,
&[InlineAsmTemplatePiece::String(
"
xgetbv
// out = rdx << 32 | rax
shl rdx, 32
or rax, rdx
"
.to_string(),
)],
&[
CInlineAsmOperand::In {
reg: InlineAsmRegOrRegClass::Reg(InlineAsmReg::X86(X86InlineAsmReg::cx)),
value: xcr_no,
},
CInlineAsmOperand::Out {
reg: InlineAsmRegOrRegClass::Reg(InlineAsmReg::X86(X86InlineAsmReg::ax)),
late: true,
place: Some(ret),
},
CInlineAsmOperand::Out {
reg: InlineAsmRegOrRegClass::Reg(InlineAsmReg::X86(X86InlineAsmReg::dx)),
late: true,
place: None,
},
],
InlineAsmOptions::NOSTACK | InlineAsmOptions::PURE | InlineAsmOptions::NOMEM,
);
}
"llvm.x86.sse3.ldu.dq" | "llvm.x86.avx.ldu.dq.256" => {