diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/lib/io-writesb.S |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/arm/lib/io-writesb.S')
-rw-r--r-- | arch/arm/lib/io-writesb.S | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/arm/lib/io-writesb.S b/arch/arm/lib/io-writesb.S new file mode 100644 index 00000000000..70b2561bdb0 --- /dev/null +++ b/arch/arm/lib/io-writesb.S @@ -0,0 +1,92 @@ +/* + * linux/arch/arm/lib/io-writesb.S + * + * Copyright (C) 1995-2000 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/linkage.h> +#include <asm/assembler.h> + + .macro outword, rd +#ifndef __ARMEB__ + strb \rd, [r0] + mov \rd, \rd, lsr #8 + strb \rd, [r0] + mov \rd, \rd, lsr #8 + strb \rd, [r0] + mov \rd, \rd, lsr #8 + strb \rd, [r0] +#else + mov lr, \rd, lsr #24 + strb lr, [r0] + mov lr, \rd, lsr #16 + strb lr, [r0] + mov lr, \rd, lsr #8 + strb lr, [r0] + strb \rd, [r0] +#endif + .endm + +.outsb_align: rsb ip, ip, #4 + cmp ip, r2 + movgt ip, r2 + cmp ip, #2 + ldrb r3, [r1], #1 + strb r3, [r0] + ldrgeb r3, [r1], #1 + strgeb r3, [r0] + ldrgtb r3, [r1], #1 + strgtb r3, [r0] + subs r2, r2, ip + bne .outsb_aligned + +ENTRY(__raw_writesb) + teq r2, #0 @ do we have to check for the zero len? + moveq pc, lr + ands ip, r1, #3 + bne .outsb_align + +.outsb_aligned: stmfd sp!, {r4, r5, lr} + + subs r2, r2, #16 + bmi .outsb_no_16 + +.outsb_16_lp: ldmia r1!, {r3, r4, r5, ip} + outword r3 + outword r4 + outword r5 + outword ip + subs r2, r2, #16 + bpl .outsb_16_lp + + tst r2, #15 + LOADREGS(eqfd, sp!, {r4, r5, pc}) + +.outsb_no_16: tst r2, #8 + beq .outsb_no_8 + + ldmia r1!, {r3, r4} + outword r3 + outword r4 + +.outsb_no_8: tst r2, #4 + beq .outsb_no_4 + + ldr r3, [r1], #4 + outword r3 + +.outsb_no_4: ands r2, r2, #3 + LOADREGS(eqfd, sp!, {r4, r5, pc}) + + cmp r2, #2 + ldrb r3, [r1], #1 + strb r3, [r0] + ldrgeb r3, [r1], #1 + strgeb r3, [r0] + ldrgtb r3, [r1] + strgtb r3, [r0] + + LOADREGS(fd, sp!, {r4, r5, pc}) |