/* 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 <davem@caip.rutgers.edu> and Jakub Jelinek <jj@ultra.linux.cz>. 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) .globl memset .set memset,__memset .hidden __memset 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)