bjoernager/rust
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Add simd_as intrinsic

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This commit is contained in:
Caleb Zulawski 2021-12-30 01:18:44 +00:00
parent d32ca64692
commit 8fae33d9b2
7 changed files with 261 additions and 173 deletions
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59
compiler/rustc_codegen_llvm/src/builder.rs
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@ -731,27 +731,11 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
}
fn fptoui_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
if !self.fptoint_sat_broken_in_llvm() {
let src_ty = self.cx.val_ty(val);
let float_width = self.cx.float_width(src_ty);
let int_width = self.cx.int_width(dest_ty);
let name = format!("llvm.fptoui.sat.i{}.f{}", int_width, float_width);
return Some(self.call_intrinsic(&name, &[val]));
}
None
self.fptoint_sat(false, val, dest_ty)
}
fn fptosi_sat(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> Option<&'ll Value> {
if !self.fptoint_sat_broken_in_llvm() {
let src_ty = self.cx.val_ty(val);
let float_width = self.cx.float_width(src_ty);
let int_width = self.cx.int_width(dest_ty);
let name = format!("llvm.fptosi.sat.i{}.f{}", int_width, float_width);
return Some(self.call_intrinsic(&name, &[val]));
}
None
self.fptoint_sat(true, val, dest_ty)
}
fn fptoui(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
@ -1455,4 +1439,43 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
_ => false,
}
}
fn fptoint_sat(
&mut self,
signed: bool,
val: &'ll Value,
dest_ty: &'ll Type,
) -> Option<&'ll Value> {
if !self.fptoint_sat_broken_in_llvm() {
let src_ty = self.cx.val_ty(val);
let (float_ty, int_ty, vector_length) = if self.cx.type_kind(src_ty) == TypeKind::Vector
{
assert_eq!(self.cx.vector_length(src_ty), self.cx.vector_length(dest_ty));
(
self.cx.element_type(src_ty),
self.cx.element_type(dest_ty),
Some(self.cx.vector_length(src_ty)),
)
} else {
(src_ty, dest_ty, None)
};
let float_width = self.cx.float_width(float_ty);
let int_width = self.cx.int_width(int_ty);
let instr = if signed { "fptosi" } else { "fptoui" };
let name = if let Some(vector_length) = vector_length {
format!(
"llvm.{}.sat.v{}i{}.v{}f{}",
instr, vector_length, int_width, vector_length, float_width
)
} else {
format!("llvm.{}.sat.i{}.f{}", instr, int_width, float_width)
};
let f =
self.declare_cfn(&name, llvm::UnnamedAddr::No, self.type_func(&[src_ty], dest_ty));
return Some(self.call(self.type_func(&[src_ty], dest_ty), f, &[val], None));
}
None
}
}