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Add support for const operands and options to global_asm!

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On x86, the default syntax is also switched to Intel to match asm!
This commit is contained in:
Amanieu d'Antras 2021-04-11 20:51:28 +01:00
parent 952c5732c2
commit 5918ee4317
36 changed files with 928 additions and 800 deletions
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32
compiler/rustc_codegen_ssa/src/common.rs
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@ -4,7 +4,8 @@ use rustc_errors::struct_span_err;
use rustc_hir as hir;
use rustc_hir::def_id::DefId;
use rustc_hir::LangItem;
use rustc_middle::ty::{Ty, TyCtxt};
use rustc_middle::mir::interpret::ConstValue;
use rustc_middle::ty::{self, layout::TyAndLayout, Ty, TyCtxt};
use rustc_session::Session;
use rustc_span::Span;
@ -194,3 +195,32 @@ pub fn shift_mask_val<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
pub fn span_invalid_monomorphization_error(a: &Session, b: Span, c: &str) {
struct_span_err!(a, b, E0511, "{}", c).emit();
}
pub fn asm_const_to_str<'tcx>(
tcx: TyCtxt<'tcx>,
sp: Span,
const_value: ConstValue<'tcx>,
ty_and_layout: TyAndLayout<'tcx>,
) -> String {
let scalar = match const_value {
ConstValue::Scalar(s) => s,
_ => {
span_bug!(sp, "expected Scalar for promoted asm const, but got {:#?}", const_value)
}
};
let value = scalar.assert_bits(ty_and_layout.size);
match ty_and_layout.ty.kind() {
ty::Uint(_) => value.to_string(),
ty::Int(int_ty) => match int_ty.normalize(tcx.sess.target.pointer_width) {
ty::IntTy::I8 => (value as i8).to_string(),
ty::IntTy::I16 => (value as i16).to_string(),
ty::IntTy::I32 => (value as i32).to_string(),
ty::IntTy::I64 => (value as i64).to_string(),
ty::IntTy::I128 => (value as i128).to_string(),
ty::IntTy::Isize => unreachable!(),
},
ty::Float(ty::FloatTy::F32) => f32::from_bits(value as u32).to_string(),
ty::Float(ty::FloatTy::F64) => f64::from_bits(value as u64).to_string(),
_ => span_bug!(sp, "asm const has bad type {}", ty_and_layout.ty),
}
}