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author | Timothy Smith <timothy.smith@sun.com> | 2009-04-01 22:02:04 -0600 |
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committer | Timothy Smith <timothy.smith@sun.com> | 2009-04-01 22:02:04 -0600 |
commit | ccbd4c045115a30da2ce0499f1c18d528a43fd39 (patch) | |
tree | c20c2c6166c0a5720a098f7bcb3a2a18288a6307 /include | |
parent | 209da010e714ebb43d96b8018c987f33974920c6 (diff) | |
parent | a293acdacf6095f29590908dd9aa66c5237ede9f (diff) | |
download | mariadb-git-ccbd4c045115a30da2ce0499f1c18d528a43fd39.tar.gz |
auto-merge -build into -bugteam
Diffstat (limited to 'include')
-rw-r--r-- | include/my_global.h | 69 |
1 files changed, 35 insertions, 34 deletions
diff --git a/include/my_global.h b/include/my_global.h index 53b5deaffb1..31bcb771c4d 100644 --- a/include/my_global.h +++ b/include/my_global.h @@ -486,40 +486,6 @@ typedef unsigned short ushort; #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 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 */ #ifndef TRUE @@ -1401,4 +1367,39 @@ do { doubleget_union _tmp; \ #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 */ |