Commit 12b0c92f authored by MySQL Build Team's avatar MySQL Build Team

merge in small portability tweaks from 5.0.80

parents 6e0a64ef d64c0e16
...@@ -66,7 +66,7 @@ typedef KEYMAP_ENTRY *Keymap; ...@@ -66,7 +66,7 @@ typedef KEYMAP_ENTRY *Keymap;
#ifndef CTRL #ifndef CTRL
#include <sys/ioctl.h> #include <sys/ioctl.h>
#if !defined(__sun) && !defined(__hpux) && !defined(_AIX) #if !defined(__sun) && !defined(__hpux) && !defined(_AIX) && !defined(__QNXNTO__) && !defined(__USLC__)
#include <sys/ttydefaults.h> #include <sys/ttydefaults.h>
#endif #endif
#ifndef CTRL #ifndef CTRL
......
...@@ -45,7 +45,7 @@ extern "C" { ...@@ -45,7 +45,7 @@ extern "C" {
#undef HAVE_SYS_MMAN_H #undef HAVE_SYS_MMAN_H
#undef HAVE_SYNCH_H #undef HAVE_SYNCH_H
#undef HAVE_MMAP #undef HAVE_MMAP
#undef HAVE_RINT #undef HAVE_FESETROUND
#define HAVE_PTHREAD_ATTR_SETSTACKSIZE 1 #define HAVE_PTHREAD_ATTR_SETSTACKSIZE 1
#define HAVE_PTHREAD_SIGMASK 1 #define HAVE_PTHREAD_SIGMASK 1
......
...@@ -486,40 +486,6 @@ typedef unsigned short ushort; ...@@ -486,40 +486,6 @@ typedef unsigned short ushort;
#define test_all_bits(a,b) (((a) & (b)) == (b)) #define test_all_bits(a,b) (((a) & (b)) == (b))
#define set_bits(type, bit_count) (sizeof(type)*8 <= (bit_count) ? ~(type) 0 : ((((type) 1) << (bit_count)) - (type) 1)) #define set_bits(type, bit_count) (sizeof(type)*8 <= (bit_count) ? ~(type) 0 : ((((type) 1) << (bit_count)) - (type) 1))
#define array_elements(A) ((uint) (sizeof(A)/sizeof(A[0]))) #define array_elements(A) ((uint) (sizeof(A)/sizeof(A[0])))
#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 */
/* Define some general constants */ /* Define some general constants */
#ifndef TRUE #ifndef TRUE
...@@ -1391,4 +1357,39 @@ do { doubleget_union _tmp; \ ...@@ -1391,4 +1357,39 @@ do { doubleget_union _tmp; \
#define MY_INT64_NUM_DECIMAL_DIGITS 21 #define MY_INT64_NUM_DECIMAL_DIGITS 21
#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 */
#endif /* my_global_h */ #endif /* my_global_h */
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