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* cleaned cvRound(), cvFloor() and cvCeil() implementations, removed the old non-banking rounding branch completely

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* enable the use of GCC/clang __builtin_*() functions more broadly
This commit is contained in:
Vadim Pisarevsky 2022-06-24 14:58:32 +03:00
parent a6ca48a1c2
commit b5adffd5c2
1 changed files with 24 additions and 42 deletions
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66
modules/core/include/opencv2/core/fast_math.hpp
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@ -128,12 +128,8 @@
#define CV_INLINE_ISNAN_FLT(value) CV_INLINE_ISNAN_DBL(value)
#endif
#if !defined(OPENCV_USE_FASTMATH_BUILTINS) \
&& ( \
defined(__x86_64__) || defined(__i686__) \
|| defined(__arm__) \
|| defined(__PPC64__) \
)
#if !defined(OPENCV_USE_FASTMATH_BUILTINS) && \
(defined __GNUC__ || defined __clang__ || defined _MSC_VER)
/* Let builtin C math functions when available. Dedicated hardware is available to
round and convert FP values. */
#define OPENCV_USE_FASTMATH_BUILTINS 1
@ -201,9 +197,7 @@ cvRound( double value )
{
#if defined CV_INLINE_ROUND_DBL
CV_INLINE_ROUND_DBL(value);
#elif ((defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__ \
&& defined __SSE2__ && !defined __APPLE__) || CV_SSE2) \
&& !defined(__CUDACC__)
#elif (defined _MSC_VER && defined _M_X64) && !defined(__CUDACC__)
__m128d t = _mm_set_sd( value );
return _mm_cvtsd_si32(t);
#elif defined _MSC_VER && defined _M_IX86
@ -214,12 +208,11 @@ cvRound( double value )
fistp t;
}
return t;
#elif defined CV_ICC || defined __GNUC__
return (int)(lrint(value));
#elif defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || \
defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS
return (int)__builtin_lrint(value);
#else
/* it's ok if round does not comply with IEEE754 standard;
the tests should allow +/-1 difference when the tested functions use round */
return (int)(value + (value >= 0 ? 0.5 : -0.5));
return (int)lrint(value);
#endif
}
@ -233,11 +226,9 @@ cvRound( double value )
*/
CV_INLINE int cvFloor( double value )
{
#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
&& ( \
defined(__PPC64__) \
)
return __builtin_floor(value);
#if defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || \
defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS
return (int)__builtin_floor(value);
#else
int i = (int)value;
return i - (i > value);
@ -253,11 +244,9 @@ CV_INLINE int cvFloor( double value )
*/
CV_INLINE int cvCeil( double value )
{
#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
&& ( \
defined(__PPC64__) \
)
return __builtin_ceil(value);
#if defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || \
defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS
return (int)__builtin_ceil(value);
#else
int i = (int)value;
return i + (i < value);
@ -312,9 +301,7 @@ CV_INLINE int cvRound(float value)
{
#if defined CV_INLINE_ROUND_FLT
CV_INLINE_ROUND_FLT(value);
#elif ((defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__ \
&& defined __SSE2__ && !defined __APPLE__) || CV_SSE2) \
&& !defined(__CUDACC__)
#elif (defined _MSC_VER && defined _M_X64) && !defined(__CUDACC__)
__m128 t = _mm_set_ss( value );
return _mm_cvtss_si32(t);
#elif defined _MSC_VER && defined _M_IX86
@ -325,12 +312,11 @@ CV_INLINE int cvRound(float value)
fistp t;
}
return t;
#elif defined CV_ICC || defined __GNUC__
return (int)(lrintf(value));
#elif defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || \
defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS
return (int)__builtin_lrintf(value);
#else
/* it's ok if round does not comply with IEEE754 standard;
the tests should allow +/-1 difference when the tested functions use round */
return (int)(value + (value >= 0 ? 0.5f : -0.5f));
return (int)lrintf(value);
#endif
}
@ -343,11 +329,9 @@ CV_INLINE int cvRound( int value )
/** @overload */
CV_INLINE int cvFloor( float value )
{
#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
&& ( \
defined(__PPC64__) \
)
return __builtin_floorf(value);
#if defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || \
defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS
return (int)__builtin_floorf(value);
#else
int i = (int)value;
return i - (i > value);
@ -363,11 +347,9 @@ CV_INLINE int cvFloor( int value )
/** @overload */
CV_INLINE int cvCeil( float value )
{
#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
&& ( \
defined(__PPC64__) \
)
return __builtin_ceilf(value);
#if defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || \
defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS
return (int)__builtin_ceilf(value);
#else
int i = (int)value;
return i + (i < value);