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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_round.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_round.c')
-rw-r--r--newlib/libm/common/sf_round.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/newlib/libm/common/sf_round.c b/newlib/libm/common/sf_round.c
new file mode 100644
index 000000000..75a72fe75
--- /dev/null
+++ b/newlib/libm/common/sf_round.c
@@ -0,0 +1,78 @@
+/*
+ * ====================================================
+ * 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 "fdlibm.h"
+
+#ifdef __STDC__
+ float roundf(float x)
+#else
+ float roundf(x)
+ float x;
+#endif
+{
+ int signbit;
+ int w;
+ /* Most significant word, least significant word. */
+ int exponent_less_127;
+
+ GET_FLOAT_WORD(w, x);
+
+ /* Extract sign bit. */
+ signbit = w & 0x80000000;
+
+ /* Extract exponent field. */
+ exponent_less_127 = ((w & 0x7f800000) >> 23) - 127;
+
+ if (exponent_less_127 < 23)
+ {
+ if (exponent_less_127 < 0)
+ {
+ w &= 0x80000000;
+ if (exponent_less_127 == -1)
+ /* Result is +1.0 or -1.0. */
+ w |= (127 << 23);
+ }
+ else
+ {
+ unsigned int exponent_mask = 0x007fffff >> exponent_less_127;
+ if ((w & exponent_mask) == 0)
+ /* x has an integral value. */
+ return x;
+
+ w += 0x00400000 >> exponent_less_127;
+ w &= ~exponent_mask;
+ }
+ }
+ else
+ {
+ if (exponent_less_127 == 128)
+ /* x is NaN or infinite. */
+ return x + x;
+ else
+ return x;
+ }
+ SET_FLOAT_WORD(x, w);
+ return x;
+}
+
+#ifdef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+ double round(double x)
+#else
+ double round(x)
+ double x;
+#endif
+{
+ return (double) roundf((float) x);
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */