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author | Thomas Fitzsimmons <fitzsim@redhat.com> | 2002-06-07 21:59:57 +0000 |
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committer | Thomas Fitzsimmons <fitzsim@redhat.com> | 2002-06-07 21:59:57 +0000 |
commit | 0953fe640f177b565578ed7ecc77169ec1a914fa (patch) | |
tree | f63c2a55e4d0e5a067da91cea95ae88a7c15af7e /newlib/libm/common/sf_lrint.c | |
parent | 2bd6505b3991588a15c865618e1edb76d4a6373c (diff) | |
download | cygnal-0953fe640f177b565578ed7ecc77169ec1a914fa.tar.gz cygnal-0953fe640f177b565578ed7ecc77169ec1a914fa.tar.bz2 cygnal-0953fe640f177b565578ed7ecc77169ec1a914fa.zip |
* libm/common/s_fdim.c: New file.
* libm/common/s_fma.c: Likewise.
* libm/common/s_fmax.c: Likewise.
* libm/common/s_fmin.c: Likewise.
* libm/common/s_fpclassify.c: Likewise.
* libm/common/s_lrint.c: Likewise.
* libm/common/s_lround.c: Likewise.
* libm/common/s_nearbyint.c: Likewise.
* libm/common/s_remquo.c: Likewise.
* libm/common/s_round.c: Likewise.
* libm/common/s_scalbln.c: Likewise.
* libm/common/s_signbit.c: Likewise.
* libm/common/s_trunc.c: Likewise.
* libm/common/sf_fdim.c: Likewise.
* libm/common/sf_fma.c: Likewise.
* libm/common/sf_fmax.c: Likewise.
* libm/common/sf_fmin.c: Likewise.
* libm/common/sf_lrint.c: Likewise.
* libm/common/sf_lround.c: Likewise.
* libm/common/sf_nearbyint.c: Likewise.
* libm/common/sf_remquo.c: Likewise.
* libm/common/sf_round.c: Likewise.
* libm/common/sf_scalbln.c: Likewise.
* libm/common/sf_trunc.c: Likewise.
* libm/math/w_exp2.c: Likewise.
* libm/math/w_tgamma.c: Likewise.
* libm/math/wf_exp2.c: Likewise.
* libm/math/wf_tgamma.c: Likewise.
* libm/mathfp/s_exp2.c: Likewise.
* libm/mathfp/s_tgamma.c: Likewise.
* libm/mathfp/sf_exp2.c: Likewise.
* libm/mathfp/sf_tgamma.c: Likewise.
* libm/math/er_gamma.c: Fix return value.
* libm/math/erf_gamma.c: Likewise.
* libm/mathfp/er_gamma.c: Likewise.
* libm/mathfp/erf_gamma.c: Likewise.
* libc/include/math.h (!__STRICT_ANSI__): Include ISOC99-specific
declarations and macros.
Regenerated all Makefile.in, aclocal.m4 and configure files to
use new libtool macros in top-level libtool.m4
Diffstat (limited to 'newlib/libm/common/sf_lrint.c')
-rw-r--r-- | newlib/libm/common/sf_lrint.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/newlib/libm/common/sf_lrint.c b/newlib/libm/common/sf_lrint.c new file mode 100644 index 000000000..a58508f02 --- /dev/null +++ b/newlib/libm/common/sf_lrint.c @@ -0,0 +1,93 @@ + +/* @(#)sf_lrint.c 5.1 93/09/24 */ +/* + * ==================================================== + * 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. + * ==================================================== + */ + +/* + * lrintf(x) + * Return x rounded to integral value according to the prevailing + * rounding mode. + * Method: + * Using floating addition. + * Exception: + * Inexact flag raised if x not equal to lrintf(x). + */ + +#include "fdlibm.h" + +#ifdef __STDC__ +static const float +#else +static float +#endif +TWO23[2]={ + 8.3886080000e+06, /* 0x4b000000 */ + -8.3886080000e+06, /* 0xcb000000 */ +}; + +#ifdef __STDC__ + long int lrintf(float x) +#else + long int lrintf(x) + float x; +#endif +{ + __int32_t j0,sx; + __uint32_t i0; + float t; + volatile float w; + long int result; + + GET_FLOAT_WORD(i0,x); + + /* Extract sign bit. */ + sx = (i0 >> 31); + + /* Extract exponent field. */ + j0 = ((i0 & 0x7f800000) >> 23) - 127; + + if (j0 < (sizeof (long int) * 8) - 1) + { + if (j0 < -1) + return 0; + else if (j0 >= 23) + result = (long int) i0 << (j0 - 23); + else + { + w = TWO23[sx] + x; + t = w - TWO23[sx]; + GET_FLOAT_WORD (i0, t); + j0 = ((i0 >> 23) & 0xff) - 0x7f; + i0 &= 0x7fffff; + i0 |= 0x800000; + result = i0 >> (23 - j0); + } + } + else + { + return (long int) x; + } + return sx ? -result : result; +} + +#ifdef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + long int lrint(double x) +#else + long int lrint(x) + double x; +#endif +{ + return (double) lrintf((float) x); +} + +#endif /* defined(_DOUBLE_IS_32BITS) */ |