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

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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.
This commit is contained in:
Matthias Kretz 2021-06-24 14:20:15 +01:00 committed by Jonathan Wakely
parent 5014f12509
commit d5125819d8
1 changed files with 12 additions and 12 deletions
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24
libstdc++-v3/include/experimental/bits/simd_x86.h
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@ -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);
}