mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-27 04:50:49 +02:00
d083ae299a
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20873 3c298f89-4303-0410-b956-a3cf2f4a3e73
104 lines
2.4 KiB
Diff
104 lines
2.4 KiB
Diff
--- a/libc/sysdeps/linux/powerpc/Makefile.arch
|
|
+++ b/libc/sysdeps/linux/powerpc/Makefile.arch
|
|
@@ -5,7 +5,7 @@
|
|
# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
|
|
#
|
|
|
|
-CSRC := __syscall_error.c pread_write.c ioctl.c
|
|
+CSRC := __syscall_error.c pread_write.c ioctl.c copysignl.c
|
|
|
|
ifeq ($(UCLIBC_HAS_ADVANCED_REALTIME),y)
|
|
CSRC += posix_fadvise.c posix_fadvise64.c
|
|
--- /dev/null
|
|
+++ b/libc/sysdeps/linux/powerpc/copysignl.c
|
|
@@ -0,0 +1,89 @@
|
|
+/* s_copysignl.c -- long double version of s_copysign.c.
|
|
+ * Conversion to long double by Ulrich Drepper,
|
|
+ * Cygnus Support, drepper@cygnus.com.
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * ====================================================
|
|
+ * 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.
|
|
+ * ====================================================
|
|
+ */
|
|
+
|
|
+/*
|
|
+ * copysignl(long double x, long double y)
|
|
+ * copysignl(x,y) returns a value with the magnitude of x and
|
|
+ * with the sign bit of y.
|
|
+ */
|
|
+
|
|
+#include <endian.h>
|
|
+#include <stdint.h>
|
|
+
|
|
+#if __FLOAT_WORD_ORDER == BIG_ENDIAN
|
|
+
|
|
+typedef union
|
|
+{
|
|
+ long double value;
|
|
+ struct
|
|
+ {
|
|
+ int sign_exponent:16;
|
|
+ unsigned int empty:16;
|
|
+ uint32_t msw;
|
|
+ uint32_t lsw;
|
|
+ } parts;
|
|
+} ieee_long_double_shape_type;
|
|
+
|
|
+#endif
|
|
+
|
|
+#if __FLOAT_WORD_ORDER == LITTLE_ENDIAN
|
|
+
|
|
+typedef union
|
|
+{
|
|
+ long double value;
|
|
+ struct
|
|
+ {
|
|
+ uint32_t lsw;
|
|
+ uint32_t msw;
|
|
+ int sign_exponent:16;
|
|
+ unsigned int empty:16;
|
|
+ } parts;
|
|
+} ieee_long_double_shape_type;
|
|
+
|
|
+#endif
|
|
+
|
|
+/* Get int from the exponent of a long double. */
|
|
+
|
|
+#define GET_LDOUBLE_EXP(exp,d) \
|
|
+do { \
|
|
+ ieee_long_double_shape_type ge_u; \
|
|
+ ge_u.value = (d); \
|
|
+ (exp) = ge_u.parts.sign_exponent; \
|
|
+} while (0)
|
|
+
|
|
+/* Set exponent of a long double from an int. */
|
|
+
|
|
+#define SET_LDOUBLE_EXP(d,exp) \
|
|
+do { \
|
|
+ ieee_long_double_shape_type se_u; \
|
|
+ se_u.value = (d); \
|
|
+ se_u.parts.sign_exponent = (exp); \
|
|
+ (d) = se_u.value; \
|
|
+} while (0)
|
|
+
|
|
+long double copysignl(long double x, long double y);
|
|
+libc_hidden_proto(copysignl);
|
|
+
|
|
+long double copysignl(long double x, long double y)
|
|
+{
|
|
+ uint32_t es1,es2;
|
|
+ GET_LDOUBLE_EXP(es1,x);
|
|
+ GET_LDOUBLE_EXP(es2,y);
|
|
+ SET_LDOUBLE_EXP(x,(es1&0x7fff)|(es2&0x8000));
|
|
+ return x;
|
|
+}
|
|
+
|
|
+libc_hidden_def(copysignl);
|