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authorAndreas Schwab <schwab@suse.de>2001-02-16 13:40:22 +0000
committerAndreas Schwab <schwab@suse.de>2001-02-16 13:40:22 +0000
commita2eb6df0cbd412cb9a82301d9f5f2864bcd83928 (patch)
tree0222ae8c8b4d2be1dff91357acaf87cc408cce94 /sysdeps/m68k/fpu
parent2d0aea11b0637e7ad3c5df6da3395a8248416811 (diff)
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Correctly handle m68k long double format.
Diffstat (limited to 'sysdeps/m68k/fpu')
-rw-r--r--sysdeps/m68k/fpu/s_fpclassifyl.c43
-rw-r--r--sysdeps/m68k/fpu/s_nextafterl.c109
2 files changed, 152 insertions, 0 deletions
diff --git a/sysdeps/m68k/fpu/s_fpclassifyl.c b/sysdeps/m68k/fpu/s_fpclassifyl.c
new file mode 100644
index 0000000000..74aa720813
--- /dev/null
+++ b/sysdeps/m68k/fpu/s_fpclassifyl.c
@@ -0,0 +1,43 @@
+/* Return classification value corresponding to argument. m68k version.
+ Copyright (C) 1997,2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+ Fixed for m68k by Andreas Schwab <schwab@suse.de>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <math.h>
+
+#include "math_private.h"
+
+
+int
+__fpclassifyl (long double x)
+{
+ u_int32_t ex, hx, lx;
+ int retval = FP_NORMAL;
+
+ GET_LDOUBLE_WORDS (ex, hx, lx, x);
+ ex &= 0x7fff;
+ if ((ex | hx | lx) == 0)
+ retval = FP_ZERO;
+ else if (ex == 0 && (hx & 0x80000000) == 0)
+ retval = FP_SUBNORMAL;
+ else if (ex == 0x7fff)
+ retval = ((hx & 0x7fffffff) | lx) != 0 ? FP_NAN : FP_INFINITE;
+
+ return retval;
+}
diff --git a/sysdeps/m68k/fpu/s_nextafterl.c b/sysdeps/m68k/fpu/s_nextafterl.c
new file mode 100644
index 0000000000..70ab5a4784
--- /dev/null
+++ b/sysdeps/m68k/fpu/s_nextafterl.c
@@ -0,0 +1,109 @@
+/* s_nextafterl.c -- long double version of s_nextafter.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@cygnus.com.
+ * Fixed for m68k by Andreas Schwab <schwab@suse.de>.
+ */
+
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/* IEEE functions
+ * nextafterl(x,y)
+ * return the next machine floating-point number of x in the
+ * direction toward y.
+ * Special cases:
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+ long double __nextafterl(long double x, long double y)
+#else
+ long double __nextafterl(x,y)
+ long double x,y;
+#endif
+{
+ int32_t ix,iy,esx,esy;
+ u_int32_t hx,hy,lx,ly;
+
+ GET_LDOUBLE_WORDS(esx,hx,lx,x);
+ GET_LDOUBLE_WORDS(esy,hy,ly,y);
+ ix = esx&0x7fff; /* |x| */
+ iy = esy&0x7fff; /* |y| */
+
+ if(((ix==0x7fff)&&((hx&0x7fffffff)|lx)!=0) || /* x is nan */
+ ((iy==0x7fff)&&((hy&0x7fffffff)|ly)!=0)) /* y is nan */
+ return x+y;
+ if(x==y) return y; /* x=y, return y */
+ if((ix|hx|lx)==0) { /* x == 0 */
+ SET_LDOUBLE_WORDS(x,esy&0x8000,0,1);/* return +-minsubnormal */
+ y = x*x;
+ if(y==x) return y; else return x; /* raise underflow flag */
+ }
+ if(esx>=0) { /* x > 0 */
+ if(esx>esy||((esx==esy) && (hx>hy||((hx==hy)&&(lx>ly))))) {
+ /* x > y, x -= ulp */
+ if(lx==0) {
+ if (ix != 0 && hx == 0x80000000) hx = 0;
+ if (hx==0) esx -= 1;
+ hx -= 1;
+ }
+ lx -= 1;
+ } else { /* x < y, x += ulp */
+ lx += 1;
+ if(lx==0) {
+ hx += 1;
+ if (hx==0) {
+ hx = 0x80000000;
+ esx += 1;
+ }
+ }
+ }
+ } else { /* x < 0 */
+ if(esy>=0||esx>esy||((esx==esy) && (hx>hy||((hx==hy)&&(lx>ly))))){
+ /* x < y, x -= ulp */
+ if(lx==0) {
+ if (ix != 0 && hx == 0x80000000) hx = 0;
+ if (hx==0) esx -= 1;
+ hx -= 1;
+ }
+ lx -= 1;
+ } else { /* x > y, x += ulp */
+ lx += 1;
+ if(lx==0) {
+ hx += 1;
+ if (hx==0) {
+ hx = 0x80000000;
+ esx += 1;
+ }
+ }
+ }
+ }
+ esy = esx&0x7fff;
+ if(esy==0x7fff) return x+x; /* overflow */
+ if(esy==0 && (hx & 0x80000000) == 0) { /* underflow */
+ y = x*x;
+ if(y!=x) { /* raise underflow flag */
+ SET_LDOUBLE_WORDS(y,esx,hx,lx);
+ return y;
+ }
+ }
+ SET_LDOUBLE_WORDS(x,esx,hx,lx);
+ return x;
+}
+weak_alias (__nextafterl, nextafterl)
+strong_alias (__nextafterl, __nexttowardl)
+weak_alias (__nextafterl, nexttowardl)