diff --git a/library/stdarch/crates/core_arch/src/x86/avx.rs b/library/stdarch/crates/core_arch/src/x86/avx.rs
index a77005c0ea12..7a169eac4d17 100644
--- a/library/stdarch/crates/core_arch/src/x86/avx.rs
+++ b/library/stdarch/crates/core_arch/src/x86/avx.rs
@@ -2436,8 +2436,6 @@ pub unsafe fn _mm256_set1_ps(a: f32) -> __m256 {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_set1_epi8)
 #[inline]
 #[target_feature(enable = "avx")]
-#[cfg_attr(test, assert_instr(vpshufb))]
-#[cfg_attr(test, assert_instr(vinsertf128))]
 // This intrinsic has no corresponding instruction.
 #[stable(feature = "simd_x86", since = "1.27.0")]
 pub unsafe fn _mm256_set1_epi8(a: i8) -> __m256i {
diff --git a/library/stdarch/crates/core_arch/src/x86/avx2.rs b/library/stdarch/crates/core_arch/src/x86/avx2.rs
index 5262628e10b5..cdf84b3820e3 100644
--- a/library/stdarch/crates/core_arch/src/x86/avx2.rs
+++ b/library/stdarch/crates/core_arch/src/x86/avx2.rs
@@ -3592,7 +3592,6 @@ pub unsafe fn _mm256_cvtsd_f64(a: __m256d) -> f64 {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_cvtsi256_si32)
 #[inline]
 #[target_feature(enable = "avx2")]
-//#[cfg_attr(test, assert_instr(movd))] FIXME
 #[stable(feature = "simd_x86", since = "1.27.0")]
 pub unsafe fn _mm256_cvtsi256_si32(a: __m256i) -> i32 {
     simd_extract(a.as_i32x8(), 0)
diff --git a/library/stdarch/crates/core_arch/src/x86/avx512bw.rs b/library/stdarch/crates/core_arch/src/x86/avx512bw.rs
index 0ef919617a49..bc1e7ddfb4a7 100644
--- a/library/stdarch/crates/core_arch/src/x86/avx512bw.rs
+++ b/library/stdarch/crates/core_arch/src/x86/avx512bw.rs
@@ -7386,7 +7386,7 @@ pub unsafe fn _mm_maskz_set1_epi16(k: __mmask8, a: i16) -> __m128i {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm512_mask_set1_epi8&expand=4970)
 #[inline]
 #[target_feature(enable = "avx512bw")]
-#[cfg_attr(test, assert_instr(vpbroadcastb))]
+#[cfg_attr(test, assert_instr(vpbroadcast))]
 pub unsafe fn _mm512_mask_set1_epi8(src: __m512i, k: __mmask64, a: i8) -> __m512i {
     let r = _mm512_set1_epi8(a).as_i8x64();
     transmute(simd_select_bitmask(k, r, src.as_i8x64()))
@@ -7397,7 +7397,7 @@ pub unsafe fn _mm512_mask_set1_epi8(src: __m512i, k: __mmask64, a: i8) -> __m512
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm512_maskz_set1_epi8&expand=4971)
 #[inline]
 #[target_feature(enable = "avx512bw")]
-#[cfg_attr(test, assert_instr(vpbroadcastb))]
+#[cfg_attr(test, assert_instr(vpbroadcast))]
 pub unsafe fn _mm512_maskz_set1_epi8(k: __mmask64, a: i8) -> __m512i {
     let r = _mm512_set1_epi8(a).as_i8x64();
     let zero = _mm512_setzero_si512().as_i8x64();
@@ -7409,7 +7409,7 @@ pub unsafe fn _mm512_maskz_set1_epi8(k: __mmask64, a: i8) -> __m512i {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_mask_set1_epi8&expand=4967)
 #[inline]
 #[target_feature(enable = "avx512bw,avx512vl")]
-#[cfg_attr(test, assert_instr(vpbroadcastb))]
+#[cfg_attr(test, assert_instr(vpbroadcast))]
 pub unsafe fn _mm256_mask_set1_epi8(src: __m256i, k: __mmask32, a: i8) -> __m256i {
     let r = _mm256_set1_epi8(a).as_i8x32();
     transmute(simd_select_bitmask(k, r, src.as_i8x32()))
@@ -7420,7 +7420,7 @@ pub unsafe fn _mm256_mask_set1_epi8(src: __m256i, k: __mmask32, a: i8) -> __m256
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_maskz_set1_epi8&expand=4968)
 #[inline]
 #[target_feature(enable = "avx512bw,avx512vl")]
-#[cfg_attr(test, assert_instr(vpbroadcastb))]
+#[cfg_attr(test, assert_instr(vpbroadcast))]
 pub unsafe fn _mm256_maskz_set1_epi8(k: __mmask32, a: i8) -> __m256i {
     let r = _mm256_set1_epi8(a).as_i8x32();
     let zero = _mm256_setzero_si256().as_i8x32();
@@ -7432,7 +7432,7 @@ pub unsafe fn _mm256_maskz_set1_epi8(k: __mmask32, a: i8) -> __m256i {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm_mask_set1_epi8&expand=4964)
 #[inline]
 #[target_feature(enable = "avx512bw,avx512vl")]
-#[cfg_attr(test, assert_instr(vpbroadcastb))]
+#[cfg_attr(test, assert_instr(vpbroadcast))]
 pub unsafe fn _mm_mask_set1_epi8(src: __m128i, k: __mmask16, a: i8) -> __m128i {
     let r = _mm_set1_epi8(a).as_i8x16();
     transmute(simd_select_bitmask(k, r, src.as_i8x16()))
@@ -7443,7 +7443,7 @@ pub unsafe fn _mm_mask_set1_epi8(src: __m128i, k: __mmask16, a: i8) -> __m128i {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm_maskz_set1_epi8&expand=4965)
 #[inline]
 #[target_feature(enable = "avx512bw,avx512vl")]
-#[cfg_attr(test, assert_instr(vpbroadcastb))]
+#[cfg_attr(test, assert_instr(vpbroadcast))]
 pub unsafe fn _mm_maskz_set1_epi8(k: __mmask16, a: i8) -> __m128i {
     let r = _mm_set1_epi8(a).as_i8x16();
     let zero = _mm_setzero_si128().as_i8x16();
diff --git a/library/stdarch/crates/core_arch/src/x86/sse2.rs b/library/stdarch/crates/core_arch/src/x86/sse2.rs
index e118ac05f8cc..2d76b75531ee 100644
--- a/library/stdarch/crates/core_arch/src/x86/sse2.rs
+++ b/library/stdarch/crates/core_arch/src/x86/sse2.rs
@@ -949,7 +949,6 @@ pub unsafe fn _mm_cvtps_epi32(a: __m128) -> __m128i {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm_cvtsi32_si128)
 #[inline]
 #[target_feature(enable = "sse2")]
-#[cfg_attr(all(test, target_arch = "x86_64"), assert_instr(movd))]
 #[stable(feature = "simd_x86", since = "1.27.0")]
 pub unsafe fn _mm_cvtsi32_si128(a: i32) -> __m128i {
     transmute(i32x4::new(a, 0, 0, 0))
@@ -960,7 +959,6 @@ pub unsafe fn _mm_cvtsi32_si128(a: i32) -> __m128i {
 /// [Intel's documentation](https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm_cvtsi128_si32)
 #[inline]
 #[target_feature(enable = "sse2")]
-#[cfg_attr(all(test, not(target_os = "windows")), assert_instr(movd))]
 #[stable(feature = "simd_x86", since = "1.27.0")]
 pub unsafe fn _mm_cvtsi128_si32(a: __m128i) -> i32 {
     simd_extract(a.as_i32x4(), 0)