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io-writesw-armv3.S
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 2k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- /*
- * linux/arch/arm/lib/io-writesw-armv3.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>
- #include <asm/hardware.h>
- .outsw_bad_alignment:
- adr r0, .outsw_bad_align_msg
- mov r2, lr
- b SYMBOL_NAME(panic)
- .outsw_bad_align_msg:
- .asciz "outsw: bad buffer alignment (0x%p, lr=0x%08lX)n"
- .align
- .outsw_align: tst r1, #1
- bne .outsw_bad_alignment
- add r1, r1, #2
- ldr r3, [r1, #-4]
- mov r3, r3, lsr #16
- orr r3, r3, r3, lsl #16
- str r3, [r0]
- subs r2, r2, #1
- RETINSTR(moveq, pc, lr)
- ENTRY(__raw_writesw)
- teq r2, #0 @ do we have to check for the zero len?
- moveq pc, lr
- tst r1, #3
- bne .outsw_align
- .outsw_aligned: stmfd sp!, {r4, r5, r6, lr}
- subs r2, r2, #8
- bmi .no_outsw_8
- .outsw_8_lp: ldmia r1!, {r3, r4, r5, r6}
- mov ip, r3, lsl #16
- orr ip, ip, ip, lsr #16
- str ip, [r0]
- mov ip, r3, lsr #16
- orr ip, ip, ip, lsl #16
- str ip, [r0]
- mov ip, r4, lsl #16
- orr ip, ip, ip, lsr #16
- str ip, [r0]
- mov ip, r4, lsr #16
- orr ip, ip, ip, lsl #16
- str ip, [r0]
- mov ip, r5, lsl #16
- orr ip, ip, ip, lsr #16
- str ip, [r0]
- mov ip, r5, lsr #16
- orr ip, ip, ip, lsl #16
- str ip, [r0]
- mov ip, r6, lsl #16
- orr ip, ip, ip, lsr #16
- str ip, [r0]
- mov ip, r6, lsr #16
- orr ip, ip, ip, lsl #16
- str ip, [r0]
- subs r2, r2, #8
- bpl .outsw_8_lp
- tst r2, #7
- LOADREGS(eqfd, sp!, {r4, r5, r6, pc})
- .no_outsw_8: tst r2, #4
- beq .no_outsw_4
- ldmia r1!, {r3, r4}
- mov ip, r3, lsl #16
- orr ip, ip, ip, lsr #16
- str ip, [r0]
- mov ip, r3, lsr #16
- orr ip, ip, ip, lsl #16
- str ip, [r0]
- mov ip, r4, lsl #16
- orr ip, ip, ip, lsr #16
- str ip, [r0]
- mov ip, r4, lsr #16
- orr ip, ip, ip, lsl #16
- str ip, [r0]
- .no_outsw_4: tst r2, #2
- beq .no_outsw_2
- ldr r3, [r1], #4
- mov ip, r3, lsl #16
- orr ip, ip, ip, lsr #16
- str ip, [r0]
- mov ip, r3, lsr #16
- orr ip, ip, ip, lsl #16
- str ip, [r0]
- .no_outsw_2: tst r2, #1
- ldrne r3, [r1]
- movne ip, r3, lsl #16
- orrne ip, ip, ip, lsr #16
- strne ip, [r0]
- LOADREGS(fd, sp!, {r4, r5, r6, pc})