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authorRoland McGrath <roland@gnu.org>2006-01-21 19:43:20 +0000
committerRoland McGrath <roland@gnu.org>2006-01-21 19:43:20 +0000
commit4b66864656e616fec289c0636c94db6a9165eb88 (patch)
tree6c0c253d09ffbd6153aad7f3128da331992db135 /sysdeps/ieee754/ldbl-opt
parent5593c5ec785373f1a5a2f713da156182a38ff5dd (diff)
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* sysdeps/ieee754/ldbl-64-128/s_nexttowardfd.c: Moved to...
* sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c: ... here. New file. * sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h (long_double_symbol_1): For C define again using _weak_alias, for assembler use weak_alias.
Diffstat (limited to 'sysdeps/ieee754/ldbl-opt')
-rw-r--r--sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h9
-rw-r--r--sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c77
2 files changed, 84 insertions, 2 deletions
diff --git a/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h b/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
index bba00c1565..692b0c53c7 100644
--- a/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
+++ b/sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h
@@ -24,10 +24,15 @@
# define ldbl_hidden_def(local, name) libc_hidden_def (name)
# define ldbl_strong_alias(name, aliasname) strong_alias (name, aliasname)
# define ldbl_weak_alias(name, aliasname) weak_alias (name, aliasname)
+# ifndef __ASSEMBLER__
/* Note that weak_alias cannot be used - it is defined to nothing
- in most of the files. */
-# define long_double_symbol_1(lib, local, symbol, version) \
+ in most of the C files. */
+# define long_double_symbol_1(lib, local, symbol, version) \
+ _weak_alias (local, symbol)
+# else
+# define long_double_symbol_1(lib, local, symbol, version) \
weak_alias (local, symbol)
+# endif
#else
# define ldbl_hidden_def(local, name) libc_hidden_def (name)
# define ldbl_strong_alias(name, aliasname) strong_alias (name, aliasname)
diff --git a/sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c b/sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c
new file mode 100644
index 0000000000..d52526f719
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c
@@ -0,0 +1,77 @@
+/* Single precision version of nexttoward.c.
+ Conversion to IEEE single float by Jakub Jelinek, jj@ultra.linux.cz. */
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/* IEEE functions
+ * __nexttowardfd(x,y)
+ * return the next machine floating-point number of x in the
+ * direction toward y.
+ * This is for machines which use different binary type for double and
+ * long double conditionally, y is long double equal to double.
+ * Special cases:
+ */
+
+#include <math_ldbl_opt.h>
+
+float __nldbl_nexttowardf(float x, double y);
+
+float __nldbl_nexttowardf(float x, double y)
+{
+ int32_t hx,hy,ix,iy;
+ u_int32_t ly;
+
+ GET_FLOAT_WORD(hx,x);
+ EXTRACT_WORDS(hy,ly,y);
+ ix = hx&0x7fffffff; /* |x| */
+ iy = hy&0x7fffffff; /* |y| */
+
+ if((ix>0x7f800000) || /* x is nan */
+ ((iy>=0x7ff00000)&&((iy-0x7ff00000)|ly)!=0)) /* y is nan */
+ return x+y;
+ if((double) x==y) return y; /* x=y, return y */
+ if(ix==0) { /* x == 0 */
+ float x2;
+ SET_FLOAT_WORD(x,(u_int32_t)(hy&0x80000000)|1);/* return +-minsub*/
+ x2 = x*x;
+ if(x2==x) return x2; else return x; /* raise underflow flag */
+ }
+ if(hx>=0) { /* x > 0 */
+ if(hy<0||(ix>>23)>(iy>>20)-0x380
+ || ((ix>>23)==(iy>>20)-0x380
+ && (ix&0x7fffff)>(((hy<<3)|(ly>>29))&0x7fffff))) /* x > y, x -= ulp */
+ hx -= 1;
+ else /* x < y, x += ulp */
+ hx += 1;
+ } else { /* x < 0 */
+ if(hy>=0||(ix>>23)>(iy>>20)-0x380
+ || ((ix>>23)==(iy>>20)-0x380
+ && (ix&0x7fffff)>(((hy<<3)|(ly>>29))&0x7fffff))) /* x < y, x -= ulp */
+ hx -= 1;
+ else /* x > y, x += ulp */
+ hx += 1;
+ }
+ hy = hx&0x7f800000;
+ if(hy>=0x7f800000) return x+x; /* overflow */
+ if(hy<0x00800000) { /* underflow */
+ float x2 = x*x;
+ if(x2!=x) { /* raise underflow flag */
+ SET_FLOAT_WORD(x2,hx);
+ return x2;
+ }
+ }
+ SET_FLOAT_WORD(x,hx);
+ return x;
+}
+
+#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
+compat_symbol (libm, __nldbl_nexttowardf, nexttowardf, GLIBC_2_1);
+#endif