From d71ff82e7019e91ae9f76af391e7f677d421e205 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Fri, 26 Aug 2005 00:01:54 +0000 Subject: import sparc-optimized string functions from glibc --- libc/string/sparc/sparc32/memset.S | 152 +++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 libc/string/sparc/sparc32/memset.S (limited to 'libc/string/sparc/sparc32/memset.S') diff --git a/libc/string/sparc/sparc32/memset.S b/libc/string/sparc/sparc32/memset.S new file mode 100644 index 000000000..02cebb791 --- /dev/null +++ b/libc/string/sparc/sparc32/memset.S @@ -0,0 +1,152 @@ +/* Set a block of memory to some byte value. + For SPARC v7. + Copyright (C) 1996, 1999, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller and + Jakub Jelinek . + + 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. */ + + /* Store 64 bytes at (BASE + OFFSET) using value SOURCE. */ +#define ZERO_BIG_BLOCK(base, offset, source) \ + std source, [base + offset + 0x00]; \ + std source, [base + offset + 0x08]; \ + std source, [base + offset + 0x10]; \ + std source, [base + offset + 0x18]; \ + std source, [base + offset + 0x20]; \ + std source, [base + offset + 0x28]; \ + std source, [base + offset + 0x30]; \ + std source, [base + offset + 0x38]; + +#define ZERO_LAST_BLOCKS(base, offset, source) \ + std source, [base - offset - 0x38]; \ + std source, [base - offset - 0x30]; \ + std source, [base - offset - 0x28]; \ + std source, [base - offset - 0x20]; \ + std source, [base - offset - 0x18]; \ + std source, [base - offset - 0x10]; \ + std source, [base - offset - 0x08]; \ + std source, [base - offset - 0x00]; + + .text + .align 4 +ENTRY(__bzero) + b 1f + mov %g0, %g3 + +3: cmp %o2, 3 + be 2f + stb %g3, [%o0] + + cmp %o2, 2 + be 2f + stb %g3, [%o0 + 0x01] + + stb %g3, [%o0 + 0x02] +2: sub %o2, 4, %o2 + add %o1, %o2, %o1 + b 4f + sub %o0, %o2, %o0 +END(__bzero) + +ENTRY(memset) + and %o1, 0xff, %g3 + sll %g3, 8, %g2 + or %g3, %g2, %g3 + sll %g3, 16, %g2 + or %g3, %g2, %g3 + orcc %o2, %g0, %o1 +1: cmp %o1, 7 + bleu 7f + mov %o0, %g1 + + andcc %o0, 3, %o2 + bne 3b +4: andcc %o0, 4, %g0 + + be 2f + mov %g3, %g2 + + st %g3, [%o0] + sub %o1, 4, %o1 + add %o0, 4, %o0 +2: andcc %o1, 0xffffff80, %o3 + be 9f + andcc %o1, 0x78, %o2 +4: ZERO_BIG_BLOCK (%o0, 0x00, %g2) + subcc %o3, 128, %o3 + ZERO_BIG_BLOCK (%o0, 0x40, %g2) + bne 4b + add %o0, 128, %o0 + + orcc %o2, %g0, %g0 +9: be 6f + andcc %o1, 7, %o1 + + mov %o7, %g4 +101: call 100f + srl %o2, 1, %o3 + mov %g4, %o7 + jmpl %o4 + (20f + 64 - 101b), %g0 + add %o0, %o2, %o0 + +100: retl + sub %o7, %o3, %o4 + +20: ZERO_LAST_BLOCKS(%o0, 0x48, %g2) + ZERO_LAST_BLOCKS(%o0, 0x08, %g2) + +6: be 8f + andcc %o1, 4, %g0 + be 1f + andcc %o1, 2, %g0 + st %g3, [%o0] + add %o0, 4, %o0 +1: be 1f + andcc %o1, 1, %g0 + sth %g3, [%o0] + add %o0, 2, %o0 +1: bne,a 8f + stb %g3, [%o0] +8: retl + mov %g1, %o0 +7: orcc %o1, 0, %g0 + be 0f + subcc %o1, 1, %o1 + stb %g3, [%o0] + be 0f + subcc %o1, 1, %o1 + stb %g3, [%o0 + 1] + be 0f + subcc %o1, 1, %o1 + stb %g3, [%o0 + 2] + be 0f + subcc %o1, 1, %o1 + stb %g3, [%o0 + 3] + be 0f + subcc %o1, 1, %o1 + stb %g3, [%o0 + 4] + be 0f + subcc %o1, 1, %o1 + stb %g3, [%o0 + 5] + be 0f + subcc %o1, 1, %o1 + stb %g3, [%o0 + 6] +0: retl + nop +END(memset) + +weak_alias (__bzero, bzero) -- cgit v1.2.3