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authorThomas Fitzsimmons <fitzsim@redhat.com>2002-06-07 21:59:57 +0000
committerThomas Fitzsimmons <fitzsim@redhat.com>2002-06-07 21:59:57 +0000
commit0953fe640f177b565578ed7ecc77169ec1a914fa (patch)
treef63c2a55e4d0e5a067da91cea95ae88a7c15af7e /newlib/libm/common/sf_lrint.c
parent2bd6505b3991588a15c865618e1edb76d4a6373c (diff)
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* 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.c93
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) */