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104 lines
2.4 KiB
104 lines
2.4 KiB
15 years ago
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--- a/libc/sysdeps/linux/powerpc/Makefile.arch
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+++ b/libc/sysdeps/linux/powerpc/Makefile.arch
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@@ -5,7 +5,7 @@
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# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
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#
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-CSRC := __syscall_error.c pread_write.c ioctl.c
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+CSRC := __syscall_error.c pread_write.c ioctl.c copysignl.c
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SSRC := \
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__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S \
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--- /dev/null
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+++ b/libc/sysdeps/linux/powerpc/copysignl.c
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@@ -0,0 +1,89 @@
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+/* s_copysignl.c -- long double version of s_copysign.c.
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+ * Conversion to long double by Ulrich Drepper,
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+ * Cygnus Support, drepper@cygnus.com.
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+ */
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+
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+/*
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+ * ====================================================
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+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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+ *
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+ * Developed at SunPro, a Sun Microsystems, Inc. business.
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+ * Permission to use, copy, modify, and distribute this
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+ * software is freely granted, provided that this notice
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+ * is preserved.
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+ * ====================================================
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+ */
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+
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+/*
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+ * copysignl(long double x, long double y)
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+ * copysignl(x,y) returns a value with the magnitude of x and
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+ * with the sign bit of y.
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+ */
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+
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+#include <endian.h>
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+#include <stdint.h>
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+
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+#if __FLOAT_WORD_ORDER == BIG_ENDIAN
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+
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+typedef union
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+{
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+ long double value;
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+ struct
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+ {
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+ int sign_exponent:16;
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+ unsigned int empty:16;
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+ uint32_t msw;
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+ uint32_t lsw;
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+ } parts;
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+} ieee_long_double_shape_type;
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+
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+#endif
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+
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+#if __FLOAT_WORD_ORDER == LITTLE_ENDIAN
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+
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+typedef union
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+{
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+ long double value;
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+ struct
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+ {
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+ uint32_t lsw;
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+ uint32_t msw;
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+ int sign_exponent:16;
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+ unsigned int empty:16;
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+ } parts;
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+} ieee_long_double_shape_type;
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+
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+#endif
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+
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+/* Get int from the exponent of a long double. */
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+
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+#define GET_LDOUBLE_EXP(exp,d) \
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+do { \
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+ ieee_long_double_shape_type ge_u; \
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+ ge_u.value = (d); \
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+ (exp) = ge_u.parts.sign_exponent; \
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+} while (0)
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+
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+/* Set exponent of a long double from an int. */
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+
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+#define SET_LDOUBLE_EXP(d,exp) \
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+do { \
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+ ieee_long_double_shape_type se_u; \
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+ se_u.value = (d); \
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+ se_u.parts.sign_exponent = (exp); \
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+ (d) = se_u.value; \
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+} while (0)
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+
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+long double copysignl(long double x, long double y);
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+libc_hidden_proto(copysignl);
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+
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+long double copysignl(long double x, long double y)
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+{
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+ uint32_t es1,es2;
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+ GET_LDOUBLE_EXP(es1,x);
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+ GET_LDOUBLE_EXP(es2,y);
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+ SET_LDOUBLE_EXP(x,(es1&0x7fff)|(es2&0x8000));
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+ return x;
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+}
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+
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+libc_hidden_def(copysignl);
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