Make sse4.2 functions const

sayantn · sayantn · commit a5e94d82a234 · 2025-10-04T06:28:44.000+05:30
diff --git a/crates/core_arch/src/x86/sse42.rs b/crates/core_arch/src/x86/sse42.rs
@@ -563,7 +563,8 @@ pub fn _mm_crc32_u32(crc: u32, v: u32) -> u32 {
 #[target_feature(enable = "sse4.2")]
 #[cfg_attr(test, assert_instr(pcmpgtq))]
 #[stable(feature = "simd_x86", since = "1.27.0")]
-pub fn _mm_cmpgt_epi64(a: __m128i, b: __m128i) -> __m128i {
+#[rustc_const_unstable(feature = "stdarch_const_intrinsics", issue = "none")]
+pub const fn _mm_cmpgt_epi64(a: __m128i, b: __m128i) -> __m128i {
     unsafe { transmute(simd_gt::<_, i64x2>(a.as_i64x2(), b.as_i64x2())) }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -563,7 +563,8 @@ pub fn _mm_crc32_u32(crc: u32, v: u32) -> u32 {`
`563`	`563`	`#[target_feature(enable = "sse4.2")]`
`564`	`564`	`#[cfg_attr(test, assert_instr(pcmpgtq))]`
`565`	`565`	`#[stable(feature = "simd_x86", since = "1.27.0")]`
`566`		`-pub fn _mm_cmpgt_epi64(a: __m128i, b: __m128i) -> __m128i {`
	`566`	`+#[rustc_const_unstable(feature = "stdarch_const_intrinsics", issue = "none")]`
	`567`	`+pub const fn _mm_cmpgt_epi64(a: __m128i, b: __m128i) -> __m128i {`
`567`	`568`	`unsafe { transmute(simd_gt::<_, i64x2>(a.as_i64x2(), b.as_i64x2())) }`
`568`	`569`	`}`
`569`	`570`