aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/sparc/udiv.S
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>1997-08-14 01:54:13 +0000
committerUlrich Drepper <drepper@redhat.com>1997-08-14 01:54:13 +0000
commitca34d7a7c77fa8dc823fd05439870e5a96610c5a (patch)
tree4b4057b8b919007f42caa4e1558bb9c5487976ae /sysdeps/sparc/udiv.S
parent0413b54c02d31cae62e8d13b3ee7ac109ceeff0e (diff)
downloadglibc-ca34d7a7c77fa8dc823fd05439870e5a96610c5a.zip
glibc-ca34d7a7c77fa8dc823fd05439870e5a96610c5a.tar.gz
glibc-ca34d7a7c77fa8dc823fd05439870e5a96610c5a.tar.bz2
1997-08-14 03:14 Ulrich Drepper <drepper@cygnus.com> * elf/dl-minimal.c: Don't use relative #include paths. (malloc): Don't try to initialize _dl_pagesize, it already is. (__sigjmp_save, longjmp): Reformat. * sysdeps/generic/dl-sysdep.c: Implement _dl_show_auxv function to show content of auxiliary array. (_dl_sysdep_start): Remember start of auxiliary vector. * sysdeps/mach/hurd/dl-sysdep.c: (_dl_show_auxv): New dummy function. * elf/link.h: Add prototype for _dl_show_auxv. * elf/rtld.c (dl_main): Call _dl_show_auxv if LD_SHOW_AUXV envvar is present. * libio/iofdopen.c: Better prepare for use in libstdc++. * libio/iofflush.c: Likewise. * libio/iofgetpos.c: Likewise. * libio/iofgets.c: Likewise. * libio/iofopen.c: Likewise. * libio/iofputs.c: Likewise. * libio/iofread.c: Likewise. * libio/iofsetpos.c: Likewise. * libio/ioftell.c: Likewise. * libio/iofwrite.c: Likewise. * libio/iogetdelim.c: Likewise. * libio/iogets.c: Likewise. * libio/iopopen.c: Likewise. * libio/ioputs.c: Likewise. * libio/iosetbuffer.c: Likewise. * libio/iosetvbuf.c: Likewise. * libio/ioungetc.c: Likewise. * libio/iovsprintf.c: Likewise. * libio/iovsscanf.c: Likewise. * manual/creature.texi: Mention _XOPEN_SOURCE_EXTENDED in correct place. * manual/math.texi: Add comment to sincos decsription to say it's a GNU extension. Fix description of random function. * posix/fnmatch.h: Recognize Windog by _WINDOWS32 not WIN32. * posix/glob.c: Likewise. Handle stupid system headers on SunOS. Add casts for all __alloca calls. * posix/glob.h: Recognize Windog by _WINDOWS32 not WIN32. Declare additional GLOB_* constants also if _GNU_SOURCE is defined. Patches by Paul D. Smith <psmith@BayNetworks.COM>. * stdio-common/_itoa.c: Don't use relateive #include paths. * sysdeps/i386/fpu/bits/mathinline.h: Enable optimizations even for gcc 2.7. (atan): Loading 1.0 from memory does not pay off. (asinh): Fix typo. 1997-08-13 09:44 Philip Blundell <Philip.Blundell@pobox.com> * sysdeps/stub/accept.c: Use socklen_t where necessary. * sysdeps/stub/bind.c: Likewise. * sysdeps/stub/connect.c: Likewise. * sysdeps/stub/getsockname.c: Likewise. * sysdeps/stub/getsockopt.c: Likewise. * sysdeps/stub/recvfrom.c: Likewise. * sysdeps/stub/sendto.c: Likewise. * sysdeps/stub/setsockopt.c: Likewise. 1997-08-11 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * io/ftw.c (object_compare): Avoid memcmp when comparing scalar types. 1997-08-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * math/libm-test.c (cbrt_test): Add epsilon for long double to `cbrt (-0.001)'. 1997-08-11 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/stub/bits/string.h: Fix comment. 1997-08-01 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/Makefile (routines): Remove dl-version. (dl-routines): Add it here instead. This removes dead code from libc.so. 1997-08-12 17:17 Wolfram Gloger <wmglo@dent.med.uni-muenchen.de> * malloc/thread-m.h (thread_atfork, thread_atfork_static): New macros to encapsulate pthread_atfork's functionality. * malloc/malloc.c (ptmalloc_lock_all, ptmalloc_unlock_all): New functions, registered via thread_atfork in the initialization routine or via thread_atfork_static in global scope. This ensures a consistent state of all locks across fork(). 1997-08-11 23:00:32 1997 Mark Kettenis <kettenis@phys.uva.nl> * login/programs/xtmp.c (compare_entry): Partially undo patch made by Klaus Espenlaub. There was no xtmp/utmp typo. Added comment to cclarify this. * login/programs/xtmp.h: Likewise. * posix/getopt.c: Recognize Windog by _WINDOWS32 not WIN32. Patch by Paul D. Smith <psmith@BayNetworks.COM>. 1997-08-12 13:51 Ulrich Drepper <drepper@cygnus.com> * login/getutid.c: Rename to __getutid and make getutid and getutxid weak aliases. Patch by ir. Mark M._Kettenis <kettenis@phys.uva.nl>. 1997-08-11 23:55 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/Makefile [subdir=misc] (sysdep_headers): Add bits/mman.h. 1997-08-11 08:51:21 1997 H.J. Lu <hjl@gnu.ai.mit.edu> * stdlib/fmtmsg.c (fmtmsg): Add static to __libc_once_define macro. * libc.map (__progname_full, __progname): Added. 1997-08-04 08:31 H.J. Lu <hjl@gnu.ai.mit.edu> * sysdeps/unix/sysv/linux/if_index.c (if_nametoindex): Return 0 if SIOGIFINDEX is not defined. (if_indextoname): Initialize "result" to NULL. (if_nametoindex, if_nameindex): Fix ENOSYS setting. 1997-08-11 11:58 Richard Henderson <rth@cygnus.com> Sparc ISO C 9x exception handling: * sysdeps/sparc/fpu/bits/mathdef.h: New file. * sysdeps/sparc/fpu/fclrexcpt.c: New file. * sysdeps/sparc/fpu/fegetenv.c: New file. * sysdeps/sparc/fpu/fegetround.c: New file. * sysdeps/sparc/fpu/feholdexcpt.c: New file. * sysdeps/sparc/fpu/fesetenv.c: New file. * sysdeps/sparc/fpu/fesetround.c: New file. * sysdeps/sparc/fpu/feupdateenv.c: New file. * sysdeps/sparc/fpu/fgetexcptflg.c: New file. * sysdeps/sparc/fpu/fraiseexcpt.c: New file. * sysdeps/sparc/fpu/fsetexcptflg.c: New file. * sysdeps/sparc/fpu/ftestexcept.c: New file. * sysdeps/sparc/sparc32/fpu/bits/fenv.h: New file. * sysdeps/sparc/sparc64/fpu/bits/fenv.h: New file. 1997-08-11 11:58 Richard Henderson <rth@cygnus.com> Sparc64 merge: * configure.in: Change up subdirectories, rename sparc8->sparcv8. * csu/Makefile: Nuke need-nopic-initfini bits. The problem was that sparc64 ld did not recognize pic relocs at all. * elf/dl-deps.c: Include <string.h>. * elf/do-rel.h (elf_dynamic_do_rel): Take reloc address and size directly instead of the DT names to get them from. * elf/dynamic-link.h (_ELF_DYNAMIC_DO_RELOC): New macro distilled from ELF_DYNAMIC_DO_REL{,A}. Define a second version that accounts for the possibility that DT_RELA and DT_JMPPLT overlap, as such is the case on the Sparc. * elf/elf.h: Stub out Elf64_Ver*, and make them the same as the Elf32_Ver* bits. The linker does not even know to differentiate between the word sizes. Someone should examine this and figure out what the proper sizes of things should be for 64-bit hosts before the sparc64 libraries are distributed. * shlib-versions: Rename sparc64 ld.so to not conflict with sparc32 on the same machine. Move old sysdeps/sparc contents to sysdeps/sparc/sparc32, rename sparc8 subdir to sparcv8, move sysdeps/sparc64 content to sysdeps/sparc/sparc64. Same for sysdeps/unix/sysv/linux/sparc. * sysdeps/sparc/Implies: Do ieee754 here. * sysdeps/sparc/configure.in: Move from sparc32/. * sysdeps/sparc/sparc32/Implies: Do wordsize here. * sysdeps/sparc/sparc64/Implies: Likewise. * sysdeps/sparc/sparc32/dl-machine.h (elf_machine_load_address): Use uninitialized .got to find load address instead of AT_BASE, as the later does not exist when running ld.so directly. * sysdeps/sparc/sparc32/fpu/fpu_control.h: Move from ../. * sysdeps/sparc/sparc64/fpu/fpu_control.h: Likewise. * sysdeps/sparc/sparc32/udiv_qrnnd.S: Clean up PIC support. * sysdeps/sparc/sparc64/Makefile (sysdep_routines): Add s_finitel and s_signbitl for stdio. * sysdeps/sparc/sparc64/configure.in: Remove, we no longer need nopic_initfini. * sysdeps/sparc/sparc64/bsd-_setjmp.S: Remove. * sysdeps/sparc/sparc64/bsd-setjmp.S: Remove. * sysdeps/unix/sysv/linux/sparc/sparc64/bsd-_setjmp.S: New empty file. * sysdeps/unix/sysv/linux/sparc/sparc64/bsd-setjmp.S: New empty file. * sysdeps/unix/sysv/linux/sparc/sparc64/longjmp.S: Add __longjmp alias. * sysdeps/unix/sysv/linux/sparc/sparc64/setjmp.S: Add weak _setjmp and setjmp entry points. * sysdeps/sparc/sparc64/dl-machine.h: Finish real implementation. * sysdeps/sparc/sparc64/elf/crtbegin.S: Add copyright, fix PIC. * sysdeps/sparc/sparc64/elf/crtend.S: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/sigaction.h (struct sigaction): Fix sa_flags size for sparc64; add sa_restorer for kernel. * sysdeps/unix/sysv/linux/sparc/sparc64/brk.S: Fix PIC. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/init-first.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/syscall.S: New file. 1997-08-10 18:29:08 1997 Mark Kettenis <kettenis@phys.uva.nl> * login/login.c (login): Check for correct return value of utmpname. 1997-08-11 16:49 Ulrich Drepper <drepper@cygnus.com> * time/tzset.c (__tzset_internal): Correctly handle TZ strings following incorrect old POSIX specs. Patch by Paul Eggert <eggert@twinsun.com>. * sysdeps/generic/bits/sigaction.h: Correct comment for SA_RESTART. * sysdeps/unix/bsd/osf/bits/sigaction.h: Likewise. * sysdeps/unix/sysv/linux/alpha/bits/sigaction.h: Likewise. * sysdeps/unix/sysv/linux/bits/sigaction.h: Likewise. * sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise. * sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise. * sysdeps/unix/sysv/minix/bits/sigaction.h: Likewise. * sysdeps/unix/sysv/sysv4/bits/sigaction.h: Likewise. Reported by NIIBE Yutaka <gniibe@mri.co.jp>. 1997-08-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/math.texi: Define the macros @mul and @infinity and use them to format the multiplication and infinity signs. (FP Comparison Functions): Use @code, not @math, for C code examples. * elf/dl-profile.c: Add descriptions and implement reading of
Diffstat (limited to 'sysdeps/sparc/udiv.S')
-rw-r--r--sysdeps/sparc/udiv.S352
1 files changed, 0 insertions, 352 deletions
diff --git a/sysdeps/sparc/udiv.S b/sysdeps/sparc/udiv.S
deleted file mode 100644
index 4a7d152..0000000
--- a/sysdeps/sparc/udiv.S
+++ /dev/null
@@ -1,352 +0,0 @@
- /* This file is generated from divrem.m4; DO NOT EDIT! */
-/*
- * Division and remainder, from Appendix E of the Sparc Version 8
- * Architecture Manual, with fixes from Gordon Irlam.
- */
-
-/*
- * Input: dividend and divisor in %o0 and %o1 respectively.
- *
- * m4 parameters:
- * .udiv name of function to generate
- * div div=div => %o0 / %o1; div=rem => %o0 % %o1
- * false false=true => signed; false=false => unsigned
- *
- * Algorithm parameters:
- * N how many bits per iteration we try to get (4)
- * WORDSIZE total number of bits (32)
- *
- * Derived constants:
- * TOPBITS number of bits in the top decade of a number
- *
- * Important variables:
- * Q the partial quotient under development (initially 0)
- * R the remainder so far, initially the dividend
- * ITER number of main division loop iterations required;
- * equal to ceil(log2(quotient) / N). Note that this
- * is the log base (2^N) of the quotient.
- * V the current comparand, initially divisor*2^(ITER*N-1)
- *
- * Cost:
- * Current estimate for non-large dividend is
- * ceil(log2(quotient) / N) * (10 + 7N/2) + C
- * A large dividend is one greater than 2^(31-TOPBITS) and takes a
- * different path, as the upper bits of the quotient must be developed
- * one bit at a time.
- */
-
-
-
-#include "sysdep.h"
-#ifdef __linux__
-#include <asm/traps.h>
-#else
-#ifdef __svr4__
-#include <sys/trap.h>
-#else
-#include <machine/trap.h>
-#endif
-#endif
-
-ENTRY(.udiv)
-
- ! Ready to divide. Compute size of quotient; scale comparand.
- orcc %o1, %g0, %o5
- bne 1f
- mov %o0, %o3
-
- ! Divide by zero trap. If it returns, return 0 (about as
- ! wrong as possible, but that is what SunOS does...).
- ta ST_DIV0
- retl
- clr %o0
-
-1:
- cmp %o3, %o5 ! if %o1 exceeds %o0, done
- blu Lgot_result ! (and algorithm fails otherwise)
- clr %o2
- sethi %hi(1 << (32 - 4 - 1)), %g1
- cmp %o3, %g1
- blu Lnot_really_big
- clr %o4
-
- ! Here the dividend is >= 2**(31-N) or so. We must be careful here,
- ! as our usual N-at-a-shot divide step will cause overflow and havoc.
- ! The number of bits in the result here is N*ITER+SC, where SC <= N.
- ! Compute ITER in an unorthodox manner: know we need to shift V into
- ! the top decade: so do not even bother to compare to R.
- 1:
- cmp %o5, %g1
- bgeu 3f
- mov 1, %g7
- sll %o5, 4, %o5
- b 1b
- add %o4, 1, %o4
-
- ! Now compute %g7.
- 2: addcc %o5, %o5, %o5
- bcc Lnot_too_big
- add %g7, 1, %g7
-
- ! We get here if the %o1 overflowed while shifting.
- ! This means that %o3 has the high-order bit set.
- ! Restore %o5 and subtract from %o3.
- sll %g1, 4, %g1 ! high order bit
- srl %o5, 1, %o5 ! rest of %o5
- add %o5, %g1, %o5
- b Ldo_single_div
- sub %g7, 1, %g7
-
- Lnot_too_big:
- 3: cmp %o5, %o3
- blu 2b
- nop
- be Ldo_single_div
- nop
- /* NB: these are commented out in the V8-Sparc manual as well */
- /* (I do not understand this) */
- ! %o5 > %o3: went too far: back up 1 step
- ! srl %o5, 1, %o5
- ! dec %g7
- ! do single-bit divide steps
- !
- ! We have to be careful here. We know that %o3 >= %o5, so we can do the
- ! first divide step without thinking. BUT, the others are conditional,
- ! and are only done if %o3 >= 0. Because both %o3 and %o5 may have the high-
- ! order bit set in the first step, just falling into the regular
- ! division loop will mess up the first time around.
- ! So we unroll slightly...
- Ldo_single_div:
- subcc %g7, 1, %g7
- bl Lend_regular_divide
- nop
- sub %o3, %o5, %o3
- mov 1, %o2
- b Lend_single_divloop
- nop
- Lsingle_divloop:
- sll %o2, 1, %o2
- bl 1f
- srl %o5, 1, %o5
- ! %o3 >= 0
- sub %o3, %o5, %o3
- b 2f
- add %o2, 1, %o2
- 1: ! %o3 < 0
- add %o3, %o5, %o3
- sub %o2, 1, %o2
- 2:
- Lend_single_divloop:
- subcc %g7, 1, %g7
- bge Lsingle_divloop
- tst %o3
- b,a Lend_regular_divide
-
-Lnot_really_big:
-1:
- sll %o5, 4, %o5
- cmp %o5, %o3
- bleu 1b
- addcc %o4, 1, %o4
- be Lgot_result
- sub %o4, 1, %o4
-
- tst %o3 ! set up for initial iteration
-Ldivloop:
- sll %o2, 4, %o2
- ! depth 1, accumulated bits 0
- bl L.1.16
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- ! depth 2, accumulated bits 1
- bl L.2.17
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- ! depth 3, accumulated bits 3
- bl L.3.19
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- ! depth 4, accumulated bits 7
- bl L.4.23
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (7*2+1), %o2
-
-L.4.23:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (7*2-1), %o2
-
-
-L.3.19:
- ! remainder is negative
- addcc %o3,%o5,%o3
- ! depth 4, accumulated bits 5
- bl L.4.21
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (5*2+1), %o2
-
-L.4.21:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (5*2-1), %o2
-
-
-
-L.2.17:
- ! remainder is negative
- addcc %o3,%o5,%o3
- ! depth 3, accumulated bits 1
- bl L.3.17
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- ! depth 4, accumulated bits 3
- bl L.4.19
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (3*2+1), %o2
-
-L.4.19:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (3*2-1), %o2
-
-
-L.3.17:
- ! remainder is negative
- addcc %o3,%o5,%o3
- ! depth 4, accumulated bits 1
- bl L.4.17
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (1*2+1), %o2
-
-L.4.17:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (1*2-1), %o2
-
-
-
-
-L.1.16:
- ! remainder is negative
- addcc %o3,%o5,%o3
- ! depth 2, accumulated bits -1
- bl L.2.15
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- ! depth 3, accumulated bits -1
- bl L.3.15
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- ! depth 4, accumulated bits -1
- bl L.4.15
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (-1*2+1), %o2
-
-L.4.15:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (-1*2-1), %o2
-
-
-L.3.15:
- ! remainder is negative
- addcc %o3,%o5,%o3
- ! depth 4, accumulated bits -3
- bl L.4.13
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (-3*2+1), %o2
-
-L.4.13:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (-3*2-1), %o2
-
-
-
-L.2.15:
- ! remainder is negative
- addcc %o3,%o5,%o3
- ! depth 3, accumulated bits -3
- bl L.3.13
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- ! depth 4, accumulated bits -5
- bl L.4.11
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (-5*2+1), %o2
-
-L.4.11:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (-5*2-1), %o2
-
-
-L.3.13:
- ! remainder is negative
- addcc %o3,%o5,%o3
- ! depth 4, accumulated bits -7
- bl L.4.9
- srl %o5,1,%o5
- ! remainder is positive
- subcc %o3,%o5,%o3
- b 9f
- add %o2, (-7*2+1), %o2
-
-L.4.9:
- ! remainder is negative
- addcc %o3,%o5,%o3
- b 9f
- add %o2, (-7*2-1), %o2
-
-
-
-
- 9:
-Lend_regular_divide:
- subcc %o4, 1, %o4
- bge Ldivloop
- tst %o3
- bl,a Lgot_result
- ! non-restoring fixup here (one instruction only!)
- sub %o2, 1, %o2
-
-
-Lgot_result:
-
- retl
- mov %o2, %o0