82 lines
1.4 KiB
ArmAsm
82 lines
1.4 KiB
ArmAsm
/*
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* linux/arch/arm/lib/io-writesw-armv4.S
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*
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* Copyright (C) 1995-2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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.macro outword, rd
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#ifndef __ARMEB__
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strh \rd, [r0]
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mov \rd, \rd, lsr #16
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strh \rd, [r0]
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#else
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mov lr, \rd, lsr #16
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strh lr, [r0]
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strh \rd, [r0]
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#endif
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.endm
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.outsw_bad_alignment:
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adr r0, .outsw_bad_align_msg
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mov r2, lr
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b panic
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.outsw_bad_align_msg:
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.asciz "outsw: bad buffer alignment (0x%p, lr=0x%08lX)\n"
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.align
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.outsw_align: tst r1, #1
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bne .outsw_bad_alignment
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ldrh r3, [r1], #2
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strh r3, [r0]
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subs r2, r2, #1
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RETINSTR(moveq, pc, lr)
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ENTRY(__raw_writesw)
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teq r2, #0 @ do we have to check for the zero len?
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moveq pc, lr
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tst r1, #3
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bne .outsw_align
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stmfd sp!, {r4, r5, lr}
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subs r2, r2, #8
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bmi .no_outsw_8
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.outsw_8_lp: ldmia r1!, {r3, r4, r5, ip}
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outword r3
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outword r4
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outword r5
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outword ip
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subs r2, r2, #8
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bpl .outsw_8_lp
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tst r2, #7
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LOADREGS(eqfd, sp!, {r4, r5, pc})
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.no_outsw_8: tst r2, #4
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beq .no_outsw_4
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ldmia r1!, {r3, ip}
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outword r3
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outword ip
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.no_outsw_4: tst r2, #2
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beq .no_outsw_2
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ldr r3, [r1], #4
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outword r3
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.no_outsw_2: tst r2, #1
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ldrneh r3, [r1]
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strneh r3, [r0]
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LOADREGS(fd, sp!, {r4, r5, pc})
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