1use rustc_middle::mir;
2use rustc_middle::ty::Ty;
3use rustc_span::Symbol;
4use rustc_target::callconv::{Conv, FnAbi};
5
6use super::horizontal_bin_op;
7use crate::*;
8
9impl<'tcx> EvalContextExt<'tcx> for crate::MiriInterpCx<'tcx> {}
10pub(super) trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
11 fn emulate_x86_sse3_intrinsic(
12 &mut self,
13 link_name: Symbol,
14 abi: &FnAbi<'tcx, Ty<'tcx>>,
15 args: &[OpTy<'tcx>],
16 dest: &MPlaceTy<'tcx>,
17 ) -> InterpResult<'tcx, EmulateItemResult> {
18 let this = self.eval_context_mut();
19 this.expect_target_feature_for_intrinsic(link_name, "sse3")?;
20 let unprefixed_name = link_name.as_str().strip_prefix("llvm.x86.sse3.").unwrap();
22
23 match unprefixed_name {
24 "hadd.ps" | "hadd.pd" | "hsub.ps" | "hsub.pd" => {
28 let [left, right] = this.check_shim(abi, Conv::C, link_name, args)?;
29
30 let which = match unprefixed_name {
31 "hadd.ps" | "hadd.pd" => mir::BinOp::Add,
32 "hsub.ps" | "hsub.pd" => mir::BinOp::Sub,
33 _ => unreachable!(),
34 };
35
36 horizontal_bin_op(this, which, false, left, right, dest)?;
37 }
38 "ldu.dq" => {
44 let [src_ptr] = this.check_shim(abi, Conv::C, link_name, args)?;
45 let src_ptr = this.read_pointer(src_ptr)?;
46 let dest = dest.force_mplace(this)?;
47
48 this.mem_copy(src_ptr, dest.ptr(), dest.layout.size, true)?;
49 }
50 _ => return interp_ok(EmulateItemResult::NotSupported),
51 }
52 interp_ok(EmulateItemResult::NeedsReturn)
53 }
54}