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Reimplement _mm_addsub_ps and _mm_addsub_pd without LLVM intrinsics

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Eduardo Sánchez Muñoz 2023-10-04 20:22:41 +02:00 • committed by Amanieu d'Antras
parent b0726bac9c
commit 388f05debc
1 changed files with 11 additions and 7 deletions
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18
library/stdarch/crates/core_arch/src/x86/sse3.rs
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@ -1,7 +1,7 @@
//! Streaming SIMD Extensions 3 (SSE3)
use crate::{
core_arch::{simd::*, simd_llvm::simd_shuffle, x86::*},
core_arch::{simd::*, simd_llvm::*, x86::*},
mem::transmute,
};
@ -17,7 +17,11 @@ use stdarch_test::assert_instr;
#[cfg_attr(test, assert_instr(addsubps))]
#[stable(feature = "simd_x86", since = "1.27.0")]
pub unsafe fn _mm_addsub_ps(a: __m128, b: __m128) -> __m128 {
addsubps(a, b)
let a = a.as_f32x4();
let b = b.as_f32x4();
let add = simd_add(a, b);
let sub = simd_sub(a, b);
simd_shuffle!(add, sub, [4, 1, 6, 3])
}
/// Alternatively add and subtract packed double-precision (64-bit)
@ -29,7 +33,11 @@ pub unsafe fn _mm_addsub_ps(a: __m128, b: __m128) -> __m128 {
#[cfg_attr(test, assert_instr(addsubpd))]
#[stable(feature = "simd_x86", since = "1.27.0")]
pub unsafe fn _mm_addsub_pd(a: __m128d, b: __m128d) -> __m128d {
addsubpd(a, b)
let a = a.as_f64x2();
let b = b.as_f64x2();
let add = simd_add(a, b);
let sub = simd_sub(a, b);
simd_shuffle!(add, sub, [2, 1])
}
/// Horizontally adds adjacent pairs of double-precision (64-bit)
@ -143,10 +151,6 @@ pub unsafe fn _mm_moveldup_ps(a: __m128) -> __m128 {
#[allow(improper_ctypes)]
extern "C" {
#[link_name = "llvm.x86.sse3.addsub.ps"]
fn addsubps(a: __m128, b: __m128) -> __m128;
#[link_name = "llvm.x86.sse3.addsub.pd"]
fn addsubpd(a: __m128d, b: __m128d) -> __m128d;
#[link_name = "llvm.x86.sse3.hadd.pd"]
fn haddpd(a: __m128d, b: __m128d) -> __m128d;
#[link_name = "llvm.x86.sse3.hadd.ps"]