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Wed Jan 1 15:15:00 1997 Ulrich Drepper <drepper@cygnus.com> * libio/Makefile (routines): Add fcloseall. * libio/fcloseall.c: New file. * libio/stdio.h [__USE_GNU]: Add prototype for fcloseall. * libio/iofclose.c: Don't close all streams when argument is NULL. * stdio/Makefile (routines): Add fcloseall. * stdio/fcloseall.c: New file. * stdio/stdio.h [__USE_GNU]: Add prototype for fcloseall. * stdio/fclose.c: Don't close all streams when argument is NULL. * manual/stdio.texi: Document fcloseall. * sysdeps/generic/abort.c: Call __fcloseall instead of fclose with NULL argument. * socket/sys/un.h (SUN_LEN): Add cast. * sunrpc/auth_unix.c (authunix_create): Change parameter types of uid, gid, and aup_gids to uid_t and gid_t respectively. (authunix_create_default): Likewise. (authunix_refresh): Correct cast for aup_gids assignment. * sunrpc/rpc/auth.h (authunix_create): Correct types in declaration. * sunrpc/rpc/auth_unix.h (struct authunix_parms): Correct field types to uid_t and gid_t respectively. (struct short_hand_verf): Likewise. Reported by Andreas Schwab. * sysdeps/ieee754/Makefile: New file. Make sure ieee754.h gets installed. * sysdeps/ieee754/ieee754.h: Protect against multiple inclusion and use in C++ programs. * sysdeps/libm-i387/e_pow.S: New file. Optimized ix87 assembler version of pow() function. * sysdeps/libm-i387/e_powf.S: New file. Float version. * sysdeps/libm-i387/e_powl.S: New file. Long double version. * sysdeps/libm-i387/s_expm1.S: New file. Optimized ix87 assembler version of expm1() function. * sysdeps/libm-i387/s_expm1f.S: New file. Float version. * sysdeps/libm-i387/s_expm1l.S: New file. Long double version. * sysdeps/libm-i387/e_exp.S: Optimize handling of +-Inf. Better handling of computation stack from current NetBSD sources. * sysdeps/libm-i387/e_expf.S: Likewise. * sysdeps/libm-i387/e_expl.S: Likewise. * sysdeps/libm-i387/e_log.S: Use fstp instead of fincstp. * sysdeps/libm-i387/e_logf.S: Likewise. * sysdeps/libm-i387/e_logl.S: Likewise. * sysdeps/libm-i387/e_log10.S: Likewise. * sysdeps/libm-i387/e_log10f.S: Likewise. * sysdeps/libm-i387/e_log10l.S: Likewise. * sysdeps/libm-i387/s_asinh.S: Likewise. * sysdeps/libm-i387/s_asinhf.S: Likewise. * sysdeps/libm-i387/s_asinhl.S: Likewise. * sysdeps/libm-i387/s_significandl.S: Likewise. * sysdeps/libm-i387/s_ceil.S: Don't create stack frame. Modify stack pointer directly. Use 32 bit instead of 16 bit operations. * sysdeps/libm-i387/s_ceilf.S: Likewise. * sysdeps/libm-i387/s_ceill.S: Likewise. * sysdeps/libm-i387/s_floor.S: Likewise. * sysdeps/libm-i387/s_floorf.S: Likewise. * sysdeps/libm-i387/s_floorl.S: Likewise. * sysdeps/libm-ieee754/e_coshf.c (huge): Don't declare volatile. * sysdeps/libm-ieee754/e_expf.c: Likewise. * sysdeps/libm-ieee754/e_powf.c: Likewise. From current NetBSD sources. * sysdeps/libm-ieee754/e_hypot.c (__ieee754_hypot): Don't initialize `a' and `b' in definition. * sysdeps/libm-ieee754/e_hypotf.c: Likewise. * sysdeps/libm-ieee754/e_hypotl.c: New file. Long double implementation. * sysdeps/libm-ieee754/e_sinhl.c: New file. Long double implementation. * sysdeps/stub/e_hypotl.c: Removed. We have a real version now. * sysdeps/stub/e_sinhl.c: Removed. * sysdeps/posix/sigpause.c (__sigpause): Use sigdelset instead of sigaddset. Reported by Andreas Schwab. (__default_sigpause): New function. Call __sigpause as BSD version. Make this the default function by providing alias sigpause. * sysdeps/stub/sigpause.c (__default_sigpause): New funciton. Simply fail. Provide alias sigpause. Wed Jan 1 12:34:54 1997 Ulrich Drepper <drepper@cygnus.com> * po/es.po: Update for glibc-1.98. * po/fr.po: Likewise. * po/sv.po: New file. Swedish translation. Wed Jan 1 12:18:07 1997 MacGyver <macgyver@tos.net> * values.h: Fix typos: use SHRT_MAX but SHORT_MAX and SHRT_MIN but SHORT_MIN. Tue Dec 24 23:10:21 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makefile: Replace `stubs.h' by `gnu/stubs.h'. * features.h: Include <gnu/stubs.h> instead of <stubs.h>. Tue Dec 24 22:16:55 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makefile (subdirs): Move `elf' last so that librtld.so isn't relinked in the `make others' pass if an add-on adds something to libc. Mon Dec 23 21:23:16 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/abort-instr.h: New File. Mon Dec 23 21:16:38 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/Makefile ($(subdir)=elf): Define CFLAGS-rtld.c to prevent warning. Mon Dec 23 21:14:22 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * resolv/Makefile (subdirs-dirs): Define. Mon Dec 23 20:56:49 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/gnu/utmpbits.h (struct utmp): Fix padding. Mon Dec 30 11:05:11 1996 Ulrich Drepper <drepper@cygnus.com> Update from ADO tzcode1996o. * time/difftime.c: De-ANSI-declfy. Simplify computation of hibit according to ADO version. * time/zic.c: Correct typo is message. Update from ADO tzdata1996n. * time/asia: Updated. * time/australasia: Likewise. * time/europe: Likewise. * time/northamerica: Likewise. * time/southamerica: Likewise.
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/* @(#)e_hypot.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: e_hypot.c,v 1.9 1995/05/12 04:57:27 jtc Exp $";
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#endif
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/* __ieee754_hypot(x,y)
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*
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* Method :
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* If (assume round-to-nearest) z=x*x+y*y
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* has error less than sqrt(2)/2 ulp, than
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* sqrt(z) has error less than 1 ulp (exercise).
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*
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* So, compute sqrt(x*x+y*y) with some care as
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* follows to get the error below 1 ulp:
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*
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* Assume x>y>0;
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* (if possible, set rounding to round-to-nearest)
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* 1. if x > 2y use
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* x1*x1+(y*y+(x2*(x+x1))) for x*x+y*y
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* where x1 = x with lower 32 bits cleared, x2 = x-x1; else
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* 2. if x <= 2y use
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* t1*y1+((x-y)*(x-y)+(t1*y2+t2*y))
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* where t1 = 2x with lower 32 bits cleared, t2 = 2x-t1,
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* y1= y with lower 32 bits chopped, y2 = y-y1.
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*
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* NOTE: scaling may be necessary if some argument is too
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* large or too tiny
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*
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* Special cases:
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* hypot(x,y) is INF if x or y is +INF or -INF; else
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* hypot(x,y) is NAN if x or y is NAN.
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*
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* Accuracy:
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* hypot(x,y) returns sqrt(x^2+y^2) with error less
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* than 1 ulps (units in the last place)
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*/
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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double __ieee754_hypot(double x, double y)
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#else
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double __ieee754_hypot(x,y)
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double x, y;
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#endif
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{
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double a,b,t1,t2,y1,y2,w;
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int32_t j,k,ha,hb;
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GET_HIGH_WORD(ha,x);
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ha &= 0x7fffffff;
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GET_HIGH_WORD(hb,y);
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hb &= 0x7fffffff;
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if(hb > ha) {a=y;b=x;j=ha; ha=hb;hb=j;} else {a=x;b=y;}
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SET_HIGH_WORD(a,ha); /* a <- |a| */
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SET_HIGH_WORD(b,hb); /* b <- |b| */
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if((ha-hb)>0x3c00000) {return a+b;} /* x/y > 2**60 */
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k=0;
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if(ha > 0x5f300000) { /* a>2**500 */
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if(ha >= 0x7ff00000) { /* Inf or NaN */
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u_int32_t low;
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w = a+b; /* for sNaN */
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GET_LOW_WORD(low,a);
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if(((ha&0xfffff)|low)==0) w = a;
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GET_LOW_WORD(low,b);
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if(((hb^0x7ff00000)|low)==0) w = b;
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return w;
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}
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/* scale a and b by 2**-600 */
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ha -= 0x25800000; hb -= 0x25800000; k += 600;
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SET_HIGH_WORD(a,ha);
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SET_HIGH_WORD(b,hb);
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}
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if(hb < 0x20b00000) { /* b < 2**-500 */
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if(hb <= 0x000fffff) { /* subnormal b or 0 */
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u_int32_t low;
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GET_LOW_WORD(low,b);
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if((hb|low)==0) return a;
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t1=0;
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SET_HIGH_WORD(t1,0x7fd00000); /* t1=2^1022 */
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b *= t1;
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a *= t1;
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k -= 1022;
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} else { /* scale a and b by 2^600 */
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ha += 0x25800000; /* a *= 2^600 */
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hb += 0x25800000; /* b *= 2^600 */
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k -= 600;
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SET_HIGH_WORD(a,ha);
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SET_HIGH_WORD(b,hb);
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}
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}
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/* medium size a and b */
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w = a-b;
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if (w>b) {
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t1 = 0;
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SET_HIGH_WORD(t1,ha);
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t2 = a-t1;
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w = __ieee754_sqrt(t1*t1-(b*(-b)-t2*(a+t1)));
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} else {
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a = a+a;
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y1 = 0;
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SET_HIGH_WORD(y1,hb);
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y2 = b - y1;
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t1 = 0;
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SET_HIGH_WORD(t1,ha+0x00100000);
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t2 = a - t1;
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w = __ieee754_sqrt(t1*y1-(w*(-w)-(t1*y2+t2*b)));
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}
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if(k!=0) {
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u_int32_t high;
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t1 = 1.0;
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GET_HIGH_WORD(high,t1);
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SET_HIGH_WORD(t1,high+(k<<20));
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return t1*w;
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} else return w;
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}
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