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Cleanup rint() portability checks

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This commit is contained in:
Sergey Vojtovich 2018-05-25 22:25:45 +04:00
parent 7ffd7fe962
commit 3e63fa6eb3
4 changed files with 0 additions and 38 deletions
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1
cmake/os/WindowsCache.cmake
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@ -139,7 +139,6 @@ SET(HAVE_READLINK CACHE INTERNAL "")
SET(HAVE_READ_REAL_TIME CACHE INTERNAL "")
SET(HAVE_REALPATH CACHE INTERNAL "")
SET(HAVE_RENAME 1 CACHE INTERNAL "")
#SET(HAVE_RINT CACHE INTERNAL "")
SET(HAVE_RWLOCK_INIT CACHE INTERNAL "")
SET(HAVE_SCHED_H CACHE INTERNAL "")
SET(HAVE_SCHED_YIELD CACHE INTERNAL "")

1
config.h.cmake
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@ -210,7 +210,6 @@
#cmakedefine HAVE_READLINK 1
#cmakedefine HAVE_REALPATH 1
#cmakedefine HAVE_RENAME 1
#cmakedefine HAVE_RINT 1
#cmakedefine HAVE_RWLOCK_INIT 1
#cmakedefine HAVE_SCHED_YIELD 1
#cmakedefine HAVE_SELECT 1

1
configure.cmake
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@ -478,7 +478,6 @@ CHECK_SYMBOL_EXISTS(FIONREAD "sys/filio.h" FIONREAD_IN_SYS_FILIO)
CHECK_SYMBOL_EXISTS(gettimeofday "sys/time.h" HAVE_GETTIMEOFDAY)
CHECK_SYMBOL_EXISTS(log2 math.h HAVE_LOG2)
CHECK_SYMBOL_EXISTS(rint math.h HAVE_RINT)
#
# Test for endianness

35
include/my_global.h
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@ -1179,41 +1179,6 @@ typedef struct { const char *dli_fname, dli_fbase; } Dl_info;
#endif
#endif /* !defined(__func__) */
#ifndef HAVE_RINT
/**
All integers up to this number can be represented exactly as double precision
values (DBL_MANT_DIG == 53 for IEEE 754 hardware).
*/
#define MAX_EXACT_INTEGER ((1LL << DBL_MANT_DIG) - 1)
/**
rint(3) implementation for platforms that do not have it.
Always rounds to the nearest integer with ties being rounded to the nearest
even integer to mimic glibc's rint() behavior in the "round-to-nearest"
FPU mode. Hardware-specific optimizations are possible (frndint on x86).
Unlike this implementation, hardware will also honor the FPU rounding mode.
*/
static inline double rint(double x)
{
double f, i;
f = modf(x, &i);
/*
All doubles with absolute values > MAX_EXACT_INTEGER are even anyway,
no need to check it.
*/
if (x > 0.0)
i += (double) ((f > 0.5) || (f == 0.5 &&
i <= (double) MAX_EXACT_INTEGER &&
(longlong) i % 2));
else
i -= (double) ((f < -0.5) || (f == -0.5 &&
i >= (double) -MAX_EXACT_INTEGER &&
(longlong) i % 2));
return i;
}
#endif /* HAVE_RINT */
/*
MYSQL_PLUGIN_IMPORT macro is used to export mysqld data
(i.e variables) for usage in storage engine loadable plugins.