From ae6b87303186d9c11aaaf87b7a9500262c0f8c5a Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 29 Mar 1999 13:25:15 +0000 Subject: Sparc string routines from Jakub. 1999-03-29 Jakub Jelinek * sysdeps/sparc/sparc32/sparcv8/Makefile: New file. * sysdeps/sparc/sparc32/sparcv8/rem.S: Delay after write %y. * sysdeps/sparc/sparc32/sparcv8/sdiv.S: Likewise. * sysdeps/sparc/sparc32/sparcv8/udiv.S: Likewise. * sysdeps/sparc/sparc32/sparcv8/urem.S: Likewise. * sysdeps/sparc/sparc32/sparcv9/bcopy.c: New file. * sysdeps/sparc/sparc32/sparcv9/bzero.c: New file. * sysdeps/sparc/sparc32/sparcv9/memchr.S: New file. * sysdeps/sparc/sparc32/sparcv9/memcmp.S: New file. * sysdeps/sparc/sparc32/sparcv9/memcpy.S: New file. * sysdeps/sparc/sparc32/sparcv9/memset.S: New file. * sysdeps/sparc/sparc32/sparcv9/stpcpy.S: New file. * sysdeps/sparc/sparc32/sparcv9/strcat.S: New file. * sysdeps/sparc/sparc32/sparcv9/strchr.S: New file. * sysdeps/sparc/sparc32/sparcv9/strcmp.S: New file. * sysdeps/sparc/sparc32/sparcv9/strcpy.S: New file. * sysdeps/sparc/sparc32/sparcv9/strcspn.S: New file. * sysdeps/sparc/sparc32/sparcv9/strlen.S: New file. * sysdeps/sparc/sparc32/sparcv9/strncpy.S: New file. * sysdeps/sparc/sparc32/sparcv9/strpbrk.S: New file. * sysdeps/sparc/sparc32/sparcv9/strrchr.c: New file. * sysdeps/sparc/sparc32/sparcv9/strspn.S: New file. * sysdeps/sparc/sparc32/sparcv9/dotmul.S: New file. * sysdeps/sparc/sparc32/sparcv9/rem.S: New file. * sysdeps/sparc/sparc32/sparcv9/sdiv.S: New file. * sysdeps/sparc/sparc32/sparcv9/udiv.S: New file. * sysdeps/sparc/sparc32/sparcv9/umul.S: New file. * sysdeps/sparc/sparc32/sparcv9/urem.S: New file. * sysdeps/sparc/sparc32/sparcv9/Makefile: New file. * sysdeps/sparc/sparc32/sparcv9/stpncpy.S: New file. * sysdeps/sparc/sparc32/sparcv9/strncmp.S: New file. * sysdeps/sparc/sparc32/bcopy.c: New file. * sysdeps/sparc/sparc32/bzero.c: New file. * sysdeps/sparc/sparc32/memchr.S: New file. * sysdeps/sparc/sparc32/memcpy.S: New file. * sysdeps/sparc/sparc32/memmove.c: New file. * sysdeps/sparc/sparc32/memset.S: New file. * sysdeps/sparc/sparc32/stpcpy.S: New file. * sysdeps/sparc/sparc32/strchr.S: New file. * sysdeps/sparc/sparc32/strrchr.c: New file. * sysdeps/sparc/sparc32/strcpy.S: New file. * sysdeps/sparc/sparc32/strlen.S: New file. * sysdeps/sparc/sparc32/strcat.S: New file. * sysdeps/sparc/sparc32/strcmp.S: New file. * sysdeps/sparc/sparc64/bcopy.c: New file. * sysdeps/sparc/sparc64/bzero.c: New file. * sysdeps/sparc/sparc64/memchr.S: New file. * sysdeps/sparc/sparc64/memcmp.S: New file. * sysdeps/sparc/sparc64/memcpy.S: New file. * sysdeps/sparc/sparc64/memset.S: New file. * sysdeps/sparc/sparc64/stpcpy.S: New file. * sysdeps/sparc/sparc64/strcat.S: New file. * sysdeps/sparc/sparc64/strchr.S: New file. * sysdeps/sparc/sparc64/strcmp.S: New file. * sysdeps/sparc/sparc64/strcpy.S: New file. * sysdeps/sparc/sparc64/strcspn.S: New file. * sysdeps/sparc/sparc64/strlen.S: New file. * sysdeps/sparc/sparc64/strncpy.S: New file. * sysdeps/sparc/sparc64/strpbrk.S: New file. * sysdeps/sparc/sparc64/strrchr.c: New file. * sysdeps/sparc/sparc64/strspn.S: New file. * sysdeps/sparc/sparc64/stpncpy.S: New file. * sysdeps/sparc/sparc64/strncmp.S: New file. * sysdeps/unix/sysv/linux/sparc/sparc32/Makefile (ASFLAGS-.os): Append -fPIC, don't replace. * configure.in: Recognize sparcv8plus / sparcv9. --- sysdeps/sparc/sparc32/stpcpy.S | 163 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 sysdeps/sparc/sparc32/stpcpy.S (limited to 'sysdeps/sparc/sparc32/stpcpy.S') diff --git a/sysdeps/sparc/sparc32/stpcpy.S b/sysdeps/sparc/sparc32/stpcpy.S new file mode 100644 index 0000000000..9d496dd8a9 --- /dev/null +++ b/sysdeps/sparc/sparc32/stpcpy.S @@ -0,0 +1,163 @@ +/* Copy SRC to DEST returning the address of the terminating '\0' in DEST. + For SPARC v7. + Copyright (C) 1996, 1999 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek . + + The GNU C 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 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include + + /* Normally, this uses ((xword - 0x01010101) & 0x80808080) test + to find out if any byte in xword could be zero. This is fast, but + also gives false alarm for any byte in range 0x81-0xff. It does + not matter for correctness, as if this test tells us there could + be some zero byte, we check it byte by byte, but if bytes with + high bits set are common in the strings, then this will give poor + performance. You can #define EIGHTBIT_NOT_RARE and the algorithm + will use one tick slower, but more precise test + ((xword - 0x01010101) & (~xword) & 0x80808080), + which does not give any false alarms (but if some bits are set, + one cannot assume from it which bytes are zero and which are not). + It is yet to be measured, what is the correct default for glibc + in these days for an average user. + */ + + .text + .align 4 +10: ldub [%o1], %o5 + stb %o5, [%o0] + cmp %o5, 0 + add %o0, 1, %o0 + be 1f + add %o1, 1, %o1 + andcc %o1, 3, %g0 + be 4f + or %o4, %lo(0x80808080), %o3 + ldub [%o1], %o5 + stb %o5, [%o0] + cmp %o5, 0 + add %o0, 1, %o0 + be 1f + add %o1, 1, %o1 + andcc %o1, 3, %g0 + be 5f + sethi %hi(0x01010101), %o4 + ldub [%o1], %o5 + stb %o5, [%o0] + cmp %o5, 0 + add %o0, 1, %o0 + be 1f + add %o1, 1, %o1 + b 6f + or %o4, %lo(0x01010101), %o2 +1: retl + add %o0, -1, %o0 + +ENTRY(__stpcpy) + andcc %o1, 3, %g0 + bne 10b + sethi %hi(0x80808080), %o4 + or %o4, %lo(0x80808080), %o3 +4: sethi %hi(0x01010101), %o4 +5: or %o4, %lo(0x01010101), %o2 +6: andcc %o0, 3, %g0 + bne 16f + sub %g0, 4, %g1 + +11: add %g1, 4, %g1 + ld [%o1 + %g1], %o5 + sub %o5, %o2, %o4 +#ifdef EIGHTBIT_NOT_RARE + andn %o4, %o5, %o4 +#endif + andcc %o4, %o3, %g0 + be,a 11b + st %o5, [%o0 + %g1] + + /* Check every byte. */ + srl %o5, 24, %g5 + andcc %g5, 0xff, %g0 + be 14f + srl %o5, 16, %g5 + andcc %g5, 0xff, %g0 + be 13f + srl %o5, 8, %g5 + andcc %g5, 0xff, %g0 + be 12f + andcc %o5, 0xff, %g0 + bne 11b + st %o5, [%o0 + %g1] + add %o0, %g1, %o0 + retl + add %o0, 3, %o0 +12: srl %o5, 16, %o5 + sth %o5, [%o0 + %g1] + add %g1, 2, %g1 + stb %g0, [%o0 + %g1] + retl + add %o0, %g1, %o0 +13: srl %o5, 16, %o5 + sth %o5, [%o0 + %g1] + add %g1, 1, %g1 + retl + add %o0, %g1, %o0 +14: stb %g0, [%o0 + %g1] + retl + add %o0, %g1, %o0 + +15: srl %o5, 24, %o4 + srl %o5, 16, %g1 + stb %o4, [%o0] + srl %o5, 8, %g4 + stb %g1, [%o0 + 1] + stb %g4, [%o0 + 2] + stb %o5, [%o0 + 3] + add %o0, 4, %o0 +16: ld [%o1], %o5 + sub %o5, %o2, %o4 + andcc %o4, %o3, %g0 + be 15b + add %o1, 4, %o1 + + /* Check every byte. */ + srl %o5, 24, %g5 + andcc %g5, 0xff, %g4 + be 19f + stb %g4, [%o0] + srl %o5, 16, %g5 + andcc %g5, 0xff, %g4 + be 18f + stb %g4, [%o0 + 1] + srl %o5, 8, %g5 + andcc %g5, 0xff, %g4 + be 17f + stb %g4, [%o0 + 2] + andcc %o5, 0xff, %g4 + stb %g4, [%o0 + 3] + bne 16b + add %o0, 4, %o0 + retl + sub %o0, 1, %o0 +17: retl + add %o0, 2, %o0 +18: retl + add %o0, 1, %o0 +19: retl + nop +END(__stpcpy) + +weak_alias(__stpcpy, stpcpy) -- cgit 1.4.1