source:
trunk/toolchain/uClibc/patches0.9.30.1/450powerpc_copysignl.patch
@
18178
Last change on this file since 18178 was 18178, checked in by nbd, 8 years ago  

File size: 2.4 KB 

libc/sysdeps/linux/powerpc/Makefile.arch
a b 5 5 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. 6 6 # 7 7 8 CSRC := __syscall_error.c pread_write.c ioctl.c 8 CSRC := __syscall_error.c pread_write.c ioctl.c copysignl.c 9 9 10 10 SSRC := \ 11 11 __longjmp.S setjmp.S bsdsetjmp.S bsd_setjmp.S brk.S \ 
new file libc/sysdeps/linux/powerpc/copysignl.c
 + 1 /* s_copysignl.c  long double version of s_copysign.c. 2 * Conversion to long double by Ulrich Drepper, 3 * Cygnus Support, drepper@cygnus.com. 4 */ 5 6 /* 7 * ==================================================== 8 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 9 * 10 * Developed at SunPro, a Sun Microsystems, Inc. business. 11 * Permission to use, copy, modify, and distribute this 12 * software is freely granted, provided that this notice 13 * is preserved. 14 * ==================================================== 15 */ 16 17 /* 18 * copysignl(long double x, long double y) 19 * copysignl(x,y) returns a value with the magnitude of x and 20 * with the sign bit of y. 21 */ 22 23 #include <endian.h> 24 #include <stdint.h> 25 26 #if __FLOAT_WORD_ORDER == BIG_ENDIAN 27 28 typedef union 29 { 30 long double value; 31 struct 32 { 33 int sign_exponent:16; 34 unsigned int empty:16; 35 uint32_t msw; 36 uint32_t lsw; 37 } parts; 38 } ieee_long_double_shape_type; 39 40 #endif 41 42 #if __FLOAT_WORD_ORDER == LITTLE_ENDIAN 43 44 typedef union 45 { 46 long double value; 47 struct 48 { 49 uint32_t lsw; 50 uint32_t msw; 51 int sign_exponent:16; 52 unsigned int empty:16; 53 } parts; 54 } ieee_long_double_shape_type; 55 56 #endif 57 58 /* Get int from the exponent of a long double. */ 59 60 #define GET_LDOUBLE_EXP(exp,d) \ 61 do { \ 62 ieee_long_double_shape_type ge_u; \ 63 ge_u.value = (d); \ 64 (exp) = ge_u.parts.sign_exponent; \ 65 } while (0) 66 67 /* Set exponent of a long double from an int. */ 68 69 #define SET_LDOUBLE_EXP(d,exp) \ 70 do { \ 71 ieee_long_double_shape_type se_u; \ 72 se_u.value = (d); \ 73 se_u.parts.sign_exponent = (exp); \ 74 (d) = se_u.value; \ 75 } while (0) 76 77 long double copysignl(long double x, long double y); 78 libc_hidden_proto(copysignl); 79 80 long double copysignl(long double x, long double y) 81 { 82 uint32_t es1,es2; 83 GET_LDOUBLE_EXP(es1,x); 84 GET_LDOUBLE_EXP(es2,y); 85 SET_LDOUBLE_EXP(x,(es1&0x7fff)(es2&0x8000)); 86 return x; 87 } 88 89 libc_hidden_def(copysignl);
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