fix(avx512f): replace _mm512_cvtsi512_si32 for GCC 10 compatibility

DiamonDinoia · DiamonDinoia · commit a7497a91b37d · 2026-02-02T19:06:16.000-05:00
Replace _mm512_cvtsi512_si32 with _mm_cvtsi128_si32(_mm512_castsi512_si128(self))
to fix compilation issues with GCC 10. The _mm512_cvtsi512_si32 intrinsic is not
available in older compiler versions.
diff --git a/include/xsimd/arch/xsimd_avx512f.hpp b/include/xsimd/arch/xsimd_avx512f.hpp
@@ -2737,15 +2737,15 @@ namespace xsimd
         {
             XSIMD_IF_CONSTEXPR(sizeof(T) == 1)
             {
-                return static_cast<T>(_mm512_cvtsi512_si32(self) & 0xFF);
+                return static_cast<T>(_mm_cvtsi128_si32(_mm512_castsi512_si128(self)) & 0xFF);
             }
             else XSIMD_IF_CONSTEXPR(sizeof(T) == 2)
             {
-                return static_cast<T>(_mm512_cvtsi512_si32(self) & 0xFFFF);
+                return static_cast<T>(_mm_cvtsi128_si32(_mm512_castsi512_si128(self)) & 0xFFFF);
             }
             else XSIMD_IF_CONSTEXPR(sizeof(T) == 4)
             {
-                return static_cast<T>(_mm512_cvtsi512_si32(self));
+                return static_cast<T>(_mm_cvtsi128_si32(_mm512_castsi512_si128(self)));
             }
             else XSIMD_IF_CONSTEXPR(sizeof(T) == 8)
             {

Original file line number	Diff line number	Diff line change
`@@ -2737,15 +2737,15 @@ namespace xsimd`
`2737`	`2737`	`{`
`2738`	`2738`	`XSIMD_IF_CONSTEXPR(sizeof(T) == 1)`
`2739`	`2739`	`{`
`2740`		`- return static_cast<T>(_mm512_cvtsi512_si32(self) & 0xFF);`
	`2740`	`+ return static_cast<T>(_mm_cvtsi128_si32(_mm512_castsi512_si128(self)) & 0xFF);`
`2741`	`2741`	`}`
`2742`	`2742`	`else XSIMD_IF_CONSTEXPR(sizeof(T) == 2)`
`2743`	`2743`	`{`
`2744`		`- return static_cast<T>(_mm512_cvtsi512_si32(self) & 0xFFFF);`
	`2744`	`+ return static_cast<T>(_mm_cvtsi128_si32(_mm512_castsi512_si128(self)) & 0xFFFF);`
`2745`	`2745`	`}`
`2746`	`2746`	`else XSIMD_IF_CONSTEXPR(sizeof(T) == 4)`
`2747`	`2747`	`{`
`2748`		`- return static_cast<T>(_mm512_cvtsi512_si32(self));`
	`2748`	`+ return static_cast<T>(_mm_cvtsi128_si32(_mm512_castsi512_si128(self)));`
`2749`	`2749`	`}`
`2750`	`2750`	`else XSIMD_IF_CONSTEXPR(sizeof(T) == 8)`
`2751`	`2751`	`{`