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[X86] avx512fp16intrin.h - allow _mm512_cvtsh_h to be used in constexpr #162114

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Merged
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Oct 6, 2025
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[X86] avx512fp16intrin.h - allow _mm512_cvtsh_h to be used in constexpr #162114

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3 changes: 2 additions & 1 deletion clang/lib/Headers/avx512fp16intrin.h
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Expand Up @@ -41,7 +41,8 @@ typedef _Float16 __m512h_u __attribute__((__vector_size__(64), __aligned__(1)));
#define __DEFAULT_FN_ATTRS128_CONSTEXPR __DEFAULT_FN_ATTRS128
#endif

static __inline__ _Float16 __DEFAULT_FN_ATTRS512 _mm512_cvtsh_h(__m512h __a) {
static __inline__ _Float16 __DEFAULT_FN_ATTRS512_CONSTEXPR
_mm512_cvtsh_h(__m512h __a) {
return __a[0];
}

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1 change: 1 addition & 0 deletions clang/test/CodeGen/X86/avx512fp16-builtins.c
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Expand Up @@ -17,6 +17,7 @@ _Float16 test_mm512_cvtsh_h(__m512h __A) {
// CHECK: extractelement <32 x half> %{{.*}}, i32 0
return _mm512_cvtsh_h(__A);
}
TEST_CONSTEXPR(_mm512_cvtsh_h((__m512h){-32.0, 31.0, -30.0, 29.0, -28.0, 27.0, -26.0, 25.0, -24.0, 23.0, -22.0, 21.0, -20.0, 19.0, -18.0, 17.0, -16.0, 15.0, -14.0, 13.0, -12.0, 11.0, -10.0, 9.0, -8.0, 7.0, -6.0, 5.0, -4.0, 3.0, -2.0, 1.0}) == -32.0);

__m128h test_mm_setzero_ph(void) {
// CHECK-LABEL: test_mm_setzero_ph
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