diff options
Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/s_modff.c')
| -rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/s_modff.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_modff.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_modff.c new file mode 100644 index 0000000000..23f6a902b3 --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_modff.c @@ -0,0 +1,54 @@ +/* s_modff.c -- float version of s_modf.c. + * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#include <math.h> +#include <math_private.h> + +static const float one = 1.0; + +float +__modff(float x, float *iptr) +{ + int32_t i0,j0; + u_int32_t i; + GET_FLOAT_WORD(i0,x); + j0 = ((i0>>23)&0xff)-0x7f; /* exponent of x */ + if(__builtin_expect(j0<23, 1)) { /* integer part in x */ + if(j0<0) { /* |x|<1 */ + SET_FLOAT_WORD(*iptr,i0&0x80000000); /* *iptr = +-0 */ + return x; + } else { + i = (0x007fffff)>>j0; + if((i0&i)==0) { /* x is integral */ + u_int32_t ix; + *iptr = x; + GET_FLOAT_WORD(ix,x); + SET_FLOAT_WORD(x,ix&0x80000000); /* return +-0 */ + return x; + } else { + SET_FLOAT_WORD(*iptr,i0&(~i)); + return x - *iptr; + } + } + } else { /* no fraction part */ + *iptr = x*one; + /* We must handle NaNs separately. */ + if (j0 == 0x80 && (i0 & 0x7fffff)) + return x*one; + SET_FLOAT_WORD(x,i0&0x80000000); /* return +-0 */ + return x; + } +} +weak_alias (__modff, modff) |