libstdc++: Avoid raising fp exceptions in trunc, floor, and ceil

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd_x86.h (_S_trunc, _S_floor)
	(_S_ceil): Set bit 8 (_MM_FROUND_NO_EXC) on AVX and SSE4.1
	roundp[sd] calls.

diff --git a/libstdc++-v3/include/experimental/bits/simd_x86.h b/libstdc++-v3/include/experimental/bits/simd_x86.h
index 5706bf6384593920ca0223e8391499ca83469e62..34633c096b1e4ab45e4cc0079ded808e2a89a8eb 100644 (file)
--- a/libstdc++-v3/include/experimental/bits/simd_x86.h
+++ b/libstdc++-v3/include/experimental/bits/simd_x86.h
@@ -2657,13 +2657,13 @@ template <typename _Abi>
        else if constexpr (__is_avx512_pd<_Tp, _Np>())
          return _mm512_roundscale_pd(__x, 0x0b);
        else if constexpr (__is_avx_ps<_Tp, _Np>())
-         return _mm256_round_ps(__x, 0x3);
+         return _mm256_round_ps(__x, 0xb);
        else if constexpr (__is_avx_pd<_Tp, _Np>())
-         return _mm256_round_pd(__x, 0x3);
+         return _mm256_round_pd(__x, 0xb);
        else if constexpr (__have_sse4_1 && __is_sse_ps<_Tp, _Np>())
-         return __auto_bitcast(_mm_round_ps(__to_intrin(__x), 0x3));
+         return __auto_bitcast(_mm_round_ps(__to_intrin(__x), 0xb));
        else if constexpr (__have_sse4_1 && __is_sse_pd<_Tp, _Np>())
-         return _mm_round_pd(__x, 0x3);
+         return _mm_round_pd(__x, 0xb);
        else if constexpr (__is_sse_ps<_Tp, _Np>())
          {
            auto __truncated
@@ -2786,13 +2786,13 @@ template <typename _Abi>
        else if constexpr (__is_avx512_pd<_Tp, _Np>())
          return _mm512_roundscale_pd(__x, 0x09);
        else if constexpr (__is_avx_ps<_Tp, _Np>())
-         return _mm256_round_ps(__x, 0x1);
+         return _mm256_round_ps(__x, 0x9);
        else if constexpr (__is_avx_pd<_Tp, _Np>())
-         return _mm256_round_pd(__x, 0x1);
+         return _mm256_round_pd(__x, 0x9);
        else if constexpr (__have_sse4_1 && __is_sse_ps<_Tp, _Np>())
-         return __auto_bitcast(_mm_floor_ps(__to_intrin(__x)));
+         return __auto_bitcast(_mm_round_ps(__to_intrin(__x), 0x9));
        else if constexpr (__have_sse4_1 && __is_sse_pd<_Tp, _Np>())
-         return _mm_floor_pd(__x);
+         return _mm_round_pd(__x, 0x9);
        else
          return _Base::_S_floor(__x);
       }
@@ -2808,13 +2808,13 @@ template <typename _Abi>
        else if constexpr (__is_avx512_pd<_Tp, _Np>())
          return _mm512_roundscale_pd(__x, 0x0a);
        else if constexpr (__is_avx_ps<_Tp, _Np>())
-         return _mm256_round_ps(__x, 0x2);
+         return _mm256_round_ps(__x, 0xa);
        else if constexpr (__is_avx_pd<_Tp, _Np>())
-         return _mm256_round_pd(__x, 0x2);
+         return _mm256_round_pd(__x, 0xa);
        else if constexpr (__have_sse4_1 && __is_sse_ps<_Tp, _Np>())
-         return __auto_bitcast(_mm_ceil_ps(__to_intrin(__x)));
+         return __auto_bitcast(_mm_round_ps(__to_intrin(__x), 0xa));
        else if constexpr (__have_sse4_1 && __is_sse_pd<_Tp, _Np>())
-         return _mm_ceil_pd(__x);
+         return _mm_round_pd(__x, 0xa);
        else
          return _Base::_S_ceil(__x);
       }