55 lines
1.1 KiB
ArmAsm
55 lines
1.1 KiB
ArmAsm
/*
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* linux/arch/arm/lib/csumpartialcopy.S
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*
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* Copyright (C) 1995-1998 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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.text
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/* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum)
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* Params : r0 = src, r1 = dst, r2 = len, r3 = checksum
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* Returns : r0 = new checksum
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*/
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.macro save_regs
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mov ip, sp
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stmfd sp!, {r1, r4 - r8, fp, ip, lr, pc}
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sub fp, ip, #4
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.endm
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.macro load_regs
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ldmfd sp, {r1, r4 - r8, fp, sp, pc}
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.endm
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.macro load1b, reg1
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ldrb \reg1, [r0], #1
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.endm
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.macro load2b, reg1, reg2
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ldrb \reg1, [r0], #1
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ldrb \reg2, [r0], #1
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.endm
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.macro load1l, reg1
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ldr \reg1, [r0], #4
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.endm
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.macro load2l, reg1, reg2
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ldr \reg1, [r0], #4
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ldr \reg2, [r0], #4
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.endm
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.macro load4l, reg1, reg2, reg3, reg4
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ldmia r0!, {\reg1, \reg2, \reg3, \reg4}
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.endm
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#define FN_ENTRY ENTRY(csum_partial_copy_nocheck)
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#include "csumpartialcopygeneric.S"
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