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authorRoland McGrath <roland@gnu.org>1995-10-16 01:37:51 +0000
committerRoland McGrath <roland@gnu.org>1995-10-16 01:37:51 +0000
commit8f5ca04bc7fd53741d80117df992995ace8f6d2d (patch)
treee39c13fc198b22ec55647259a8080051988e8c69 /sysdeps/hppa/udiv_qrnnd.s
parent5d82cf5c55f56ae10d3b0a205d1fcc7de1cf56a0 (diff)
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Sat Oct 14 02:52:36 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de>
* malloc/malloc.c (_malloc_internal): Performance fix. Move if statement out of loop. * stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster implementation using GMP functions. Contributed by Torbjorn Granlund and Ulrich Drepper. * stdio/test_rdwr.c: Include <errno.h>. * sysdeps/i386/i586/Implies: New file. New highly optimized string functions for i[345]86. * sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files. * sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files. * sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files. * sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files. * sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files. * sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files. * sysdeps/i386/i586/strlen.S: New file. * sysdeps/i386/memchr.c: Removed. There is now an assembler version. * sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did not correspond to used values. * sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper around a kernel header file. * sysdeps/unix/sysv/linux/Dist: Add it. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers): Likewise. * sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of defining ourself we use a kernel header file. * sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system call handler for i586. * sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up. Sat Oct 14 02:52:36 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de> * malloc/malloc.c (_malloc_internal): Performance fix. Move if statement out of loop. * stdio/_itoa.c, stdio/_itoa.h: Complete rewrite. Much faster implementation using GMP functions. Contributed by Torbjorn Granlund and Ulrich Drepper. * stdio/test_rdwr.c: Include <errno.h>. * sysdeps/i386/i586/Implies: New file. New highly optimized string functions for i[345]86. * sysdeps/i386/memchr.S, sysdeps/i386/memcmp.S: New files. * sysdeps/i386/stpcpy.S, sysdeps/i386/stpncpy.S: New files. * sysdeps/i386/strchr.S, sysdeps/i386/strcspn.S: New files. * sysdeps/i386/strpbrk.S, sysdeps/i386/strrchr.S: New files. * sysdeps/i386/strspn.S, sysdeps/i386/i486/strcat.S: New files. * sysdeps/i386/i486/strlen.S, sysdeps/i386/i586/strchr.S: New files. * sysdeps/i386/i586/strlen.S: New file. * sysdeps/i386/memchr.c: Removed. There is now an assembler version. * sysdeps/i386/i586/memcopy.h (WORD_COPY_BWD): Parameters did not correspond to used values. * sysdeps/unix/sysv/linux/nfs/nfs.h: New file. Simply a wrapper around a kernel header file. * sysdeps/unix/sysv/linux/Dist: Add it. * sysdeps/unix/sysv/linux/Makefile [$(subdir)=sunrpc] (headers): Likewise. * sysdeps/unix/sysv/linux/local_lim.h: Rewrite. Instead of defining ourself we use a kernel header file. * sysdeps/unix/sysv/linux/i386/sysdep.h (DO_CALL): Optimize system call handler for i586. * sysdeps/unix/sysv/linux/sys/param.h: Add copyright and clean up.
Diffstat (limited to 'sysdeps/hppa/udiv_qrnnd.s')
-rw-r--r--sysdeps/hppa/udiv_qrnnd.s285
1 files changed, 285 insertions, 0 deletions
diff --git a/sysdeps/hppa/udiv_qrnnd.s b/sysdeps/hppa/udiv_qrnnd.s
new file mode 100644
index 0000000000..0b069bf7f9
--- /dev/null
+++ b/sysdeps/hppa/udiv_qrnnd.s
@@ -0,0 +1,285 @@
+; HP-PA __udiv_qrnnd division support, used from longlong.h.
+; This version runs fast on pre-PA7000 CPUs.
+
+; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
+
+; This file is part of the GNU MP Library.
+
+; The GNU MP Library is free software; you can redistribute it and/or modify
+; it under the terms of the GNU Library General Public License as published by
+; the Free Software Foundation; either version 2 of the License, or (at your
+; option) any later version.
+
+; The GNU MP Library is distributed in the hope that it will be useful, but
+; WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
+; License for more details.
+
+; You should have received a copy of the GNU Library General Public License
+; along with the GNU MP Library; see the file COPYING.LIB. If not, write to
+; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+; INPUT PARAMETERS
+; rem_ptr gr26
+; n1 gr25
+; n0 gr24
+; d gr23
+
+; The code size is a bit excessive. We could merge the last two ds;addc
+; sequences by simply moving the "bb,< Odd" instruction down. The only
+; trouble is the FFFFFFFF code that would need some hacking.
+
+ .code
+ .export __udiv_qrnnd
+__udiv_qrnnd
+ .proc
+ .callinfo frame=0,no_calls
+ .entry
+
+ comb,< %r23,0,L$largedivisor
+ sub %r0,%r23,%r1 ; clear cy as side-effect
+ ds %r0,%r1,%r0
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r23,%r25
+ addc %r24,%r24,%r28
+ ds %r25,%r23,%r25
+ comclr,>= %r25,%r0,%r0
+ addl %r25,%r23,%r25
+ stws %r25,0(0,%r26)
+ bv 0(%r2)
+ addc %r28,%r28,%r28
+
+L$largedivisor
+ extru %r24,31,1,%r19 ; r19 = n0 & 1
+ bb,< %r23,31,L$odd
+ extru %r23,30,31,%r22 ; r22 = d >> 1
+ shd %r25,%r24,1,%r24 ; r24 = new n0
+ extru %r25,30,31,%r25 ; r25 = new n1
+ sub %r0,%r22,%r21
+ ds %r0,%r21,%r0
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ comclr,>= %r25,%r0,%r0
+ addl %r25,%r22,%r25
+ sh1addl %r25,%r19,%r25
+ stws %r25,0(0,%r26)
+ bv 0(%r2)
+ addc %r24,%r24,%r28
+
+L$odd addib,sv,n 1,%r22,L$FF.. ; r22 = (d / 2 + 1)
+ shd %r25,%r24,1,%r24 ; r24 = new n0
+ extru %r25,30,31,%r25 ; r25 = new n1
+ sub %r0,%r22,%r21
+ ds %r0,%r21,%r0
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r24
+ ds %r25,%r22,%r25
+ addc %r24,%r24,%r28
+ comclr,>= %r25,%r0,%r0
+ addl %r25,%r22,%r25
+ sh1addl %r25,%r19,%r25
+; We have computed (n1,,n0) / (d + 1), q' = r28, r' = r25
+ add,nuv %r28,%r25,%r25
+ addl %r25,%r1,%r25
+ addc %r0,%r28,%r28
+ sub,<< %r25,%r23,%r0
+ addl %r25,%r1,%r25
+ stws %r25,0(0,%r26)
+ bv 0(%r2)
+ addc %r0,%r28,%r28
+
+; This is just a special case of the code above.
+; We come here when d == 0xFFFFFFFF
+L$FF.. add,uv %r25,%r24,%r24
+ sub,<< %r24,%r23,%r0
+ ldo 1(%r24),%r24
+ stws %r24,0(0,%r26)
+ bv 0(%r2)
+ addc %r0,%r25,%r28
+
+ .exit
+ .procend