1e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng/* 2e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * linux/arch/m32r/lib/memcpy.S 3e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 4e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Copyright (C) 2001 Hiroyuki Kondo, and Hirokazu Takata 5e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * Copyright (C) 2004 Hirokazu Takata 6e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 7e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * void *memcopy(void *dst, const void *src, int n); 8e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * 9e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * dst: r0 10e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * src: r1 11e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng * n : r2 12e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng */ 13e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 14e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .text 15e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <linux/linkage.h> 16e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#include <asm/assembler.h> 17e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 18e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#ifdef CONFIG_ISA_DUAL_ISSUE 19e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 20e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .text 21e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengENTRY(memcpy) 22e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengmemcopy: 23e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng mv r4, r0 || mv r7, r0 24e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng or r7, r1 || cmpz r2 25e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng jc r14 || cmpeq r0, r1 ; return if r2=0 26e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng jc r14 ; return if r0=r1 27e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 28e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng and3 r7, r7, #3 29e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bnez r7, byte_copy 30e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng srl3 r3, r2, #2 31e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng and3 r2, r2, #3 32e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng beqz r3, byte_copy 33e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r4, #-4 34e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengword_copy: 35e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ld r7, @r1+ || addi r3, #-1 36e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng st r7, @+r4 || cmpz r2 37e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bnez r3, word_copy 38e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r4, #4 || jc r14 ; return if r2=0 39e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#if defined(CONFIG_ISA_M32R2) 40e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengbyte_copy: 41e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ldb r7, @r1 || addi r1, #1 42e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r2, #-1 || stb r7, @r4+ 43e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bnez r2, byte_copy 44e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#elif defined(CONFIG_ISA_M32R) 45e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengbyte_copy: 46e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ldb r7, @r1 || addi r1, #1 47e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r2, #-1 || stb r7, @r4 48e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r4, #1 49e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bnez r2, byte_copy 50e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#else 51e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#error unknown isa configuration 52e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#endif 53e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengend_memcopy: 54e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng jmp r14 55e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 56e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#else /* not CONFIG_ISA_DUAL_ISSUE */ 57e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 58e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .text 59e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen ChengENTRY(memcpy) 60e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengmemcopy: 61e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng mv r4, r0 62e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng mv r7, r0 63e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng or r7, r1 64e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng beq r0, r1, end_memcopy 65e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng beqz r2, end_memcopy 66e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 67e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng and3 r7, r7, #3 68e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bnez r7, byte_copy 69e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng srl3 r3, r2, #2 70e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng and3 r2, r2, #3 71e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng beqz r3, byte_copy 72e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r4, #-4 73e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengword_copy: 74e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ld r7, @r1+ 75e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r3, #-1 76e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng st r7, @+r4 77e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bnez r3, word_copy 78e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng beqz r2, end_memcopy 79e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r4, #4 80e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengbyte_copy: 81e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng ldb r7, @r1 82e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r1, #1 83e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r2, #-1 84e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng stb r7, @r4 85e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng addi r4, #1 86e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng bnez r2, byte_copy 87e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Chengend_memcopy: 88e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng jmp r14 89e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 90e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng#endif /* not CONFIG_ISA_DUAL_ISSUE */ 91e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng 92e6e8a0bd7cffcc9ae2e0e75546fb12a19213d4aeBen Cheng .end 93