diff options
Diffstat (limited to 'sysdeps/ieee754/flt-32/s_floorf.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_floorf.c | 55 |
1 files changed, 33 insertions, 22 deletions
diff --git a/sysdeps/ieee754/flt-32/s_floorf.c b/sysdeps/ieee754/flt-32/s_floorf.c index afe02a1693..da6c6dfa8a 100644 --- a/sysdeps/ieee754/flt-32/s_floorf.c +++ b/sysdeps/ieee754/flt-32/s_floorf.c @@ -27,34 +27,45 @@ #include <math-use-builtins.h> float -__floorf(float x) +__floorf (float x) { #if USE_FLOORF_BUILTIN return __builtin_floorf (x); #else /* Use generic implementation. */ - int32_t i0,j0; - uint32_t i; - GET_FLOAT_WORD(i0,x); - j0 = ((i0>>23)&0xff)-0x7f; - if(j0<23) { - if(j0<0) { - /* return 0*sign(x) if |x|<1 */ - if(i0>=0) {i0=0;} - else if((i0&0x7fffffff)!=0) - { i0=0xbf800000;} - } else { - i = (0x007fffff)>>j0; - if((i0&i)==0) return x; /* x is integral */ - if(i0<0) i0 += (0x00800000)>>j0; - i0 &= (~i); - } - } else { - if(__builtin_expect(j0==0x80, 0)) return x+x; /* inf or NaN */ - else return x; /* x is integral */ + int32_t i0, j0; + uint32_t i; + GET_FLOAT_WORD (i0, x); + j0 = ((i0 >> 23) & 0xff) - 0x7f; + if (j0 < 23) + { + if (j0 < 0) + { + /* return 0 * sign (x) if |x| < 1 */ + if (i0 >= 0) + i0 = 0; + else if ((i0 & 0x7fffffff) != 0) + i0 = 0xbf800000; } - SET_FLOAT_WORD(x,i0); - return x; + else + { + i = (0x007fffff) >> j0; + if ((i0 & i) == 0) + return x; /* x is integral */ + if (i0 < 0) + i0 += (0x00800000) >> j0; + i0 &= (~i); + } + } + else + { + if (__glibc_unlikely (j0 == 0x80)) + return x + x; /* inf or NaN */ + else + return x; /* x is integral */ + } + SET_FLOAT_WORD (x, i0); + return x; #endif /* ! USE_FLOORF_BUILTIN */ } #ifndef __floorf |