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Linux/arch/arm/lib/csumpartialcopy.S

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  *  linux/arch/arm/lib/csumpartialcopy.S
  4  *
  5  *  Copyright (C) 1995-1998 Russell King
  6  */
  7 #include <linux/linkage.h>
  8 #include <asm/assembler.h>
  9 
 10                 .text
 11 
 12 /* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len)
 13  * Params  : r0 = src, r1 = dst, r2 = len
 14  * Returns : r0 = new checksum
 15  */
 16 
 17                 .macro  save_regs
 18                 stmfd   sp!, {r1, r4 - r8, lr}
 19                 .endm
 20 
 21                 .macro  load_regs
 22                 ldmfd   sp!, {r1, r4 - r8, pc}
 23                 .endm
 24 
 25                 .macro  load1b, reg1
 26                 ldrb    \reg1, [r0], #1
 27                 .endm
 28 
 29                 .macro  load2b, reg1, reg2
 30                 ldrb    \reg1, [r0], #1
 31                 ldrb    \reg2, [r0], #1
 32                 .endm
 33 
 34                 .macro  load1l, reg1
 35                 ldr     \reg1, [r0], #4
 36                 .endm
 37 
 38                 .macro  load2l, reg1, reg2
 39                 ldr     \reg1, [r0], #4
 40                 ldr     \reg2, [r0], #4
 41                 .endm
 42 
 43                 .macro  load4l, reg1, reg2, reg3, reg4
 44                 ldmia   r0!, {\reg1, \reg2, \reg3, \reg4}
 45                 .endm
 46 
 47 #define FN_ENTRY        ENTRY(csum_partial_copy_nocheck)
 48 #define FN_EXIT         ENDPROC(csum_partial_copy_nocheck)
 49 
 50 #include "csumpartialcopygeneric.S"

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