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| author | Ulrich Drepper <drepper@redhat.com> | 2002-09-05 10:28:51 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2002-09-05 10:28:51 +0000 |
| commit | 92b27c7470ca2844e4e1265746cb56ad1f664df3 (patch) | |
| tree | 989027a0a57d82034206d3e2bbb7a4151dd2e24f /sysdeps/powerpc/powerpc32/strchr.S | |
| parent | 75e4a282218ce382d0fb3ff1ffef2108dd84fcce (diff) | |
| download | glibc-92b27c7470ca2844e4e1265746cb56ad1f664df3.tar.gz glibc-92b27c7470ca2844e4e1265746cb56ad1f664df3.tar.xz glibc-92b27c7470ca2844e4e1265746cb56ad1f664df3.zip | |
Update.
2002-07-29 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/__longjmp.S: Moved to... * sysdeps/powerpc/powerpc32/__longjmp.S: ...here. * sysdeps/powerpc/add_n.S: Moved to... * sysdeps/powerpc/powerpc32/add_n.S: ...here. * sysdeps/powerpc/addmul_1.S: Moved to... * sysdeps/powerpc/powerpc32/addmul_1.S: ...here. * sysdeps/powerpc/atomicity.h: Moved to... * sysdeps/powerpc/powerpc32/atomicity.h: ...here. * sysdeps/powerpc/backtrace.c: Moved to... * sysdeps/powerpc/powerpc32/backtrace.c: ...here. * sysdeps/powerpc/bp-asm.h: Moved to... * sysdeps/powerpc/powerpc32/bp-asm.h: ...here. * sysdeps/powerpc/bsd-_setjmp.S: Moved to... * sysdeps/powerpc/powerpc32/bsd-_setjmp.S: ...here. * sysdeps/powerpc/bsd-setjmp.S: Moved to... * sysdeps/powerpc/powerpc32/bsd-setjmp.S: ...here. * sysdeps/powerpc/dl-machine.c: Moved to... * sysdeps/powerpc/powerpc32/dl-machine.c: ...here. * sysdeps/powerpc/dl-machine.h: Moved to... * sysdeps/powerpc/powerpc32/dl-machine.h: ...here. * sysdeps/powerpc/dl-start.S: Moved to... * sysdeps/powerpc/powerpc32/dl-start.S: ...here. * sysdeps/powerpc/gprrest0.S: Moved to... * sysdeps/powerpc/powerpc32/gprrest0.S: ...here. * sysdeps/powerpc/gprrest1.S: Moved to... * sysdeps/powerpc/powerpc32/gprrest1.S: ...here. * sysdeps/powerpc/gprsave0.S: Moved to... * sysdeps/powerpc/powerpc32/gprsave0.S: ...here. * sysdeps/powerpc/gprsave1.S: Moved to... * sysdeps/powerpc/powerpc32/gprsave1.S: ...here. * sysdeps/powerpc/lshift.S: Moved to... * sysdeps/powerpc/powerpc32/lshift.S: ...here. * sysdeps/powerpc/memset.S: Moved to... * sysdeps/powerpc/powerpc32/memset.S: ...here. * sysdeps/powerpc/mul_1.S: Moved to... * sysdeps/powerpc/powerpc32/mul_1.S: ...here. * sysdeps/powerpc/ppc-mcount.S: Moved to... * sysdeps/powerpc/powerpc32/ppc-mcount.S: ...here. * sysdeps/powerpc/register-dump.h: Moved to... * sysdeps/powerpc/powerpc32/register-dump.h: ...here. * sysdeps/powerpc/rshift.S: Moved to... * sysdeps/powerpc/powerpc32/rshift.S: ...here. * sysdeps/powerpc/setjmp.S: Moved to... * sysdeps/powerpc/powerpc32/setjmp.S: ...here. * sysdeps/powerpc/stpcpy.S: Moved to... * sysdeps/powerpc/powerpc32/stpcpy.S: ...here. * sysdeps/powerpc/strchr.S: Moved to... * sysdeps/powerpc/powerpc32/strchr.S: ...here. * sysdeps/powerpc/strcmp.S: Moved to... * sysdeps/powerpc/powerpc32/strcmp.S: ...here. * sysdeps/powerpc/strcpy.S: Moved to... * sysdeps/powerpc/powerpc32/strcpy.S: ...here. * sysdeps/powerpc/strlen.S: Moved to... * sysdeps/powerpc/powerpc32/strlen.S: ...here. * sysdeps/powerpc/sub_n.S: Moved to... * sysdeps/powerpc/powerpc32/sub_n.S: ...here. * sysdeps/powerpc/submul_1.S: Moved to... * sysdeps/powerpc/powerpc32/submul_1.S: ...here. * sysdeps/powerpc/elf/bzero.S: Moved to... * sysdeps/powerpc/powerpc32/elf/bzero.S: ...here. * sysdeps/powerpc/elf/start.S: Moved to... * sysdeps/powerpc/powerpc32/elf/start.S: ...here. * sysdeps/powerpc/fpu/__longjmp.S: Moved to... * sysdeps/powerpc/powerpc32/fpu/__longjmp.S: ...here. * sysdeps/powerpc/fpu/fprrest.S: Moved to... * sysdeps/powerpc/powerpc32/fpu/fprrest.S: ...here. * sysdeps/powerpc/fpu/fprsave.S: Moved to... * sysdeps/powerpc/powerpc32/fpu/fprsave.S: ...here. * sysdeps/powerpc/fpu/setjmp.S: Moved to... * sysdeps/powerpc/powerpc32/fpu/setjmp.S: ...here. * sysdeps/powerpc/fpu/s_copysign.S: Moved to... * sysdeps/powerpc/powerpc32/fpu/s_copysign.S: ...here. * sysdeps/powerpc/fpu/s_copysignf.S: Moved to... * sysdeps/powerpc/powerpc32/fpu/s_copysignf.S: ...here. * sysdeps/unix/sysv/linux/powerpc/brk.S: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/brk.S: ...here. * sysdeps/unix/sysv/linux/powerpc/clone.S: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: ...here. * sysdeps/unix/sysv/linux/powerpc/glob64.c: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/glob64.c: ...here. * sysdeps/unix/sysv/linux/powerpc/kernel_stat.h: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/kernel_stat.h: ...here. * sysdeps/unix/sysv/linux/powerpc/socket.S: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/socket.S: ...here. * sysdeps/unix/sysv/linux/powerpc/sysdep.h: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: ...here. * sysdeps/unix/sysv/linux/powerpc/syscalls.list: Moved to... * sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: ...here. Support PowerPC64. Separate powerpc into powerpc/powerpc32 and powerpc/powerpc64. 2002-07-29 Steven Munroe <sjmunroe@us.ibm.com> * FAQ.in: Add powerpc64 to supported targets list. Also state the minimum gcc version is 3.2 * README: Add powerpc64 to supported targets list. * configure.in: Change machine=powerpc to machine=powerpc/powerpc32. Add powerpc64 and machine=powerpc/powerpc64. (HAVE_ASM_GLOBAL_DOT_NAME): Define if linux*powerpc/powerpc64*. * shlib-versions: Set DEFAULT version to 2.2.5 for powerpc64. * sysdeps/powerpc/Dist: Remove dl-machine.c, dl-start.S, ppc-mcount.S, gprsave1.S, gprsave0.S, gprrest1.S, and gprrest0.S. * sysdeps/powerpc/powerpc32/Dist: New file. * sysdeps/powerpc/Implies: Remove wordsize-32 and powerpc/soft-fp. * sysdeps/powerpc/powerpc32/Implies: New file. * sysdeps/powerpc/Makefile(cflags): Remove powerpc32 specific cflags. ($(with-fp) = no): Move test to powerpc32/Makefile. ($(subdir) = misc): Move to powerpc32/Makefile. ($(build-shared) = yes): Move to powerpc32/Makefile. ($(subdir) = csu): Move to powerpc32/Makefile. (sysdep-rtld-routines): Remove dl-start. Moved these bits to ... * sysdeps/powerpc/powerpc32/Makefile: New file. * sysdeps/powerpc/Versions: Remove libgcc functions. * sysdeps/powerpc/powerpc32/Versions: New file. * sysdeps/powerpc/fpu/Makefile: Remove fprsave and fprrest. * sysdeps/powerpc/powerpc32/fpu/Makefile: New file. * sysdeps/unix/sysv/linux/configure.in (powerpc*): Set arch_minimum_kernel=2.4.19 for powerpc/powerpc64. Also set libc_cv_gcc_unwind_find_fde=yes only if !powerpc/powerpc64. ($machine): Add powerpc/powerpc64 to if ... | for libc_cv_slibdir=/libc64. (powerpc*): Set ldd_rewrite_script. * sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed: New file. * sysdeps/unix/sysv/linux/powerpc/Dist: Remove clone.S. * sysdeps/unix/sysv/linux/powerpc/powerpc32/Dist: New file. Add clone.S. * sysdeps/unix/sysv/linux/powerpc/Makefile: Remove oldgetrlimit64. * sysdeps/unix/sysv/linux/powerpc/Versions: Remove GLIBC_2.0 functions. Remove GLIBC_2.2 functions except getrlimit and setrlimit. Moved them to ... * sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions: New file. 2002-09-04 Ulrich Drepper <drepper@redhat.com> * libio/tst-atime.c: Include <errno.h>. (do_test): Only perform fstatvfs check if ST_NOATIME is defined. 2002-09-03 Isamu Hasegawa <isamu@yamato.ibm.com> * posix/regcomp.c (regcomp): Append "__restrict" modifier to avoid warnings of some compilers. (build_collating_symbol): Change the type of characters from "unsigned char" to "char", and append a cast to "char*" pointer in array subscript. (build_collating_symbol): Likewise. (build_equiv_class): Likewise. (build_charclass): Likewise. (re_compile_pattern): Remove incorrect cast. (re_compile_fastmap_iter): Change the type of characters from "unsigned char" to "char", and append a cast to "char*" pointer in array subscript. (parse_bracket_exp): Likewise. * posix/regex_internal.c (re_string_construct_common): Likewise. (re_string_allocate): Likewise. (re_string_construct): Likewise. (re_string_realloc_buffers): Likewise. (build_wcs_buffer): Likewise. (re_string_reconstruct): Likewise. * posix/regex_internal.h: Change the type of characters in re_string_t and bracket_elem_t from "unsigned char" to "char". * posix/regexec.c (regexec): Append "__restrict" modifier to avoid warnings of some compilers. (transit_state_bkref_loop): Change the type of characters from "unsigned char" to "char", and append a cast to "char*" pointer in array subscript. (check_node_accept_bytes): Likewise. (find_collation_sequence_value): Likewise.
Diffstat (limited to 'sysdeps/powerpc/powerpc32/strchr.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/strchr.S | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/strchr.S b/sysdeps/powerpc/powerpc32/strchr.S new file mode 100644 index 0000000000..1adee411b6 --- /dev/null +++ b/sysdeps/powerpc/powerpc32/strchr.S @@ -0,0 +1,130 @@ +/* Optimized strchr implementation for PowerPC. + Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <bp-sym.h> +#include <bp-asm.h> + +/* See strlen.s for comments on how this works. */ + +/* char * [r3] strchr (const char *s [r3] , int c [r4] ) */ + +ENTRY (BP_SYM (strchr)) + +#define rTMP1 r0 +#define rRTN r3 /* outgoing result */ +#if __BOUNDED_POINTERS__ +# define rSTR r4 +# define rCHR r5 /* byte we're looking for, spread over the whole word */ +# define rWORD r8 /* the current word */ +#else +# define rSTR r8 /* current word pointer */ +# define rCHR r4 /* byte we're looking for, spread over the whole word */ +# define rWORD r5 /* the current word */ +#endif +#define rCLZB rCHR /* leading zero byte count */ +#define rFEFE r6 /* constant 0xfefefeff (-0x01010101) */ +#define r7F7F r7 /* constant 0x7f7f7f7f */ +#define rTMP2 r9 +#define rIGN r10 /* number of bits we should ignore in the first word */ +#define rMASK r11 /* mask with the bits to ignore set to 0 */ +#define rTMP3 r12 + + CHECK_BOUNDS_LOW (rSTR, rTMP1, rTMP2) + STORE_RETURN_BOUNDS (rTMP1, rTMP2) + + rlwimi rCHR, rCHR, 8, 16, 23 + li rMASK, -1 + rlwimi rCHR, rCHR, 16, 0, 15 + rlwinm rIGN, rRTN, 3, 27, 28 + lis rFEFE, -0x101 + lis r7F7F, 0x7f7f + clrrwi rSTR, rRTN, 2 + addi rFEFE, rFEFE, -0x101 + addi r7F7F, r7F7F, 0x7f7f +/* Test the first (partial?) word. */ + lwz rWORD, 0(rSTR) + srw rMASK, rMASK, rIGN + orc rWORD, rWORD, rMASK + add rTMP1, rFEFE, rWORD + nor rTMP2, r7F7F, rWORD + and. rTMP1, rTMP1, rTMP2 + xor rTMP3, rCHR, rWORD + orc rTMP3, rTMP3, rMASK + b L(loopentry) + +/* The loop. */ + +L(loop):lwzu rWORD, 4(rSTR) + and. rTMP1, rTMP1, rTMP2 +/* Test for 0. */ + add rTMP1, rFEFE, rWORD + nor rTMP2, r7F7F, rWORD + bne L(foundit) + and. rTMP1, rTMP1, rTMP2 +/* Start test for the bytes we're looking for. */ + xor rTMP3, rCHR, rWORD +L(loopentry): + add rTMP1, rFEFE, rTMP3 + nor rTMP2, r7F7F, rTMP3 + beq L(loop) +/* There is a zero byte in the word, but may also be a matching byte (either + before or after the zero byte). In fact, we may be looking for a + zero byte, in which case we return a match. We guess that this hasn't + happened, though. */ +L(missed): + and. rTMP1, rTMP1, rTMP2 + li rRTN, 0 + STORE_RETURN_VALUE (rSTR) + beqlr +/* It did happen. Decide which one was first... + I'm not sure if this is actually faster than a sequence of + rotates, compares, and branches (we use it anyway because it's shorter). */ + and rFEFE, r7F7F, rWORD + or rMASK, r7F7F, rWORD + and rTMP1, r7F7F, rTMP3 + or rIGN, r7F7F, rTMP3 + add rFEFE, rFEFE, r7F7F + add rTMP1, rTMP1, r7F7F + nor rWORD, rMASK, rFEFE + nor rTMP2, rIGN, rTMP1 + cmplw rWORD, rTMP2 + bgtlr + cntlzw rCLZB, rTMP2 + srwi rCLZB, rCLZB, 3 + add rRTN, rSTR, rCLZB + CHECK_BOUNDS_HIGH_RTN (rSTR, rTMP2, twlge) + STORE_RETURN_VALUE (rSTR) + blr + +L(foundit): + and rTMP1, r7F7F, rTMP3 + or rIGN, r7F7F, rTMP3 + add rTMP1, rTMP1, r7F7F + nor rTMP2, rIGN, rTMP1 + cntlzw rCLZB, rTMP2 + subi rSTR, rSTR, 4 + srwi rCLZB, rCLZB, 3 + add rRTN, rSTR, rCLZB + CHECK_BOUNDS_HIGH_RTN (rSTR, rTMP2, twlge) + STORE_RETURN_VALUE (rSTR) + blr +END (BP_SYM (strchr)) + +weak_alias (BP_SYM (strchr), BP_SYM (index)) |