| /* 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. */ |
| |
| #include <sysdep.h> |
| |
| /* 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) |
| libc_hidden_builtin_def (memset) |
| |
| weak_alias (__bzero, bzero) |