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From: Jonathan Wakely <redi@gcc.gnu.org>
To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org
Subject: [gcc r12-1786] libstdc++: Avoid raising fp exceptions in trunc, floor, and ceil
Date: Thu, 24 Jun 2021 13:34:43 +0000 (GMT) [thread overview]
Message-ID: <20210624133443.D66843888027@sourceware.org> (raw)
https://gcc.gnu.org/g:d5125819d86274383041571daa3698d72bbac661
commit r12-1786-gd5125819d86274383041571daa3698d72bbac661
Author: Matthias Kretz <m.kretz@gsi.de>
Date: Thu Jun 24 14:20:15 2021 +0100
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:
---
libstdc++-v3/include/experimental/bits/simd_x86.h | 24 +++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/libstdc++-v3/include/experimental/bits/simd_x86.h b/libstdc++-v3/include/experimental/bits/simd_x86.h
index 5706bf63845..34633c096b1 100644
--- 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);
}
reply other threads:[~2021-06-24 13:34 UTC|newest]
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