diff options
Diffstat (limited to 'sysdeps/ieee754/flt-32/s_nearbyintf.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_nearbyintf.c | 60 |
1 files changed, 33 insertions, 27 deletions
diff --git a/sysdeps/ieee754/flt-32/s_nearbyintf.c b/sysdeps/ieee754/flt-32/s_nearbyintf.c index b37e003..2a79907 100644 --- a/sysdeps/ieee754/flt-32/s_nearbyintf.c +++ b/sysdeps/ieee754/flt-32/s_nearbyintf.c @@ -24,7 +24,7 @@ #include <math-use-builtins.h> float -__nearbyintf(float x) +__nearbyintf (float x) { #if USE_NEARBYINTF_BUILTIN return __builtin_nearbyintf (x); @@ -35,33 +35,39 @@ __nearbyintf(float x) 8.3886080000e+06, /* 0x4b000000 */ -8.3886080000e+06, /* 0xcb000000 */ }; - fenv_t env; - int32_t i0,j0,sx; - float w,t; - GET_FLOAT_WORD(i0,x); - sx = (i0>>31)&1; - j0 = ((i0>>23)&0xff)-0x7f; - if(j0<23) { - if(j0<0) { - libc_feholdexceptf (&env); - w = TWO23[sx] + math_opt_barrier (x); - t = w-TWO23[sx]; - math_force_eval (t); - libc_fesetenvf (&env); - GET_FLOAT_WORD(i0,t); - SET_FLOAT_WORD(t,(i0&0x7fffffff)|(sx<<31)); - return t; - } - } else { - if(__builtin_expect(j0==0x80, 0)) return x+x; /* inf or NaN */ - else return x; /* x is integral */ + fenv_t env; + int32_t i0, j0, sx; + float w, t; + GET_FLOAT_WORD (i0, x); + sx = (i0 >> 31) & 1; + j0 = ((i0 >> 23) & 0xff) - 0x7f; + if (j0 < 23) + { + if (j0 < 0) + { + libc_feholdexceptf (&env); + w = TWO23[sx] + math_opt_barrier (x); + t = w - TWO23[sx]; + math_force_eval (t); + libc_fesetenvf (&env); + GET_FLOAT_WORD (i0, t); + SET_FLOAT_WORD (t, (i0 & 0x7fffffff) | (sx << 31)); + return t; } - libc_feholdexceptf (&env); - w = TWO23[sx] + math_opt_barrier (x); - t = w-TWO23[sx]; - math_force_eval (t); - libc_fesetenvf (&env); - return t; + } + else + { + if (__glibc_unlikely (j0 == 0x80)) + return x + x; /* inf or NaN */ + else + return x; /* x is integral */ + } + libc_feholdexceptf (&env); + w = TWO23[sx] + math_opt_barrier (x); + t = w - TWO23[sx]; + math_force_eval (t); + libc_fesetenvf (&env); + return t; #endif /* ! USE_NEARBYINT_BUILTIN */ } libm_alias_float (__nearbyint, nearbyint) |