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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [machine/] [xscale/] [memcpy.c] - Rev 301
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#if defined __thumb__ #include "../../string/memcpy.c" #else #include <string.h> #include "xscale.h" void * memcpy (void *dst0, const void *src0, size_t len) { int dummy; asm volatile ( #ifndef __OPTIMIZE_SIZE__ "cmp %2, #0x3\n\ bls 3f\n\ and lr, %1, #0x3\n\ and r3, %0, #0x3\n\ cmp lr, r3\n\ bne 3f\n\ cmp lr, #0x0\n\ beq 2f\n\ b 1f\n\ 0:\n\ ldrb r3, [%1], #1\n\ " PRELOADSTR ("%1") "\n\ tst %1, #0x3\n\ strb r3, [%0], #1\n\ beq 3f\n\ 1:\n\ sub %2, %2, #1\n\ cmn %2, #1\n\ bne 0b\n\ 2:\n\ cmp %2, #0xf\n\ bls 1f\n\ 0:\n\ ldmia %1!, { r3, r4, r5, lr }\n\ " PRELOADSTR ("%1") "\n\ \n\ sub %2, %2, #16\n\ cmp %2, #0xf\n\ stmia %0!, { r3, r4, r5, lr }\n\ bhi 0b\n\ 1:\n\ cmp %2, #0x7\n\ bls 1f\n\ 0:\n\ ldmia %1!, { r3, r4 }\n\ " PRELOADSTR ("%1") "\n\ \n\ sub %2, %2, #8\n\ cmp %2, #0x7\n\ stmia %0!, { r3, r4 }\n\ bhi 0b\n\ 1:\n\ cmp %2, #0x3\n\ bls 3f\n\ 0:\n\ sub %2, %2, #4\n\ ldr r3, [%1], #4\n\ " PRELOADSTR ("%1") "\n\ \n\ cmp %2, #0x3\n\ str r3, [%0], #4\n\ bhi 0b\n\ " #endif /* !__OPTIMIZE_SIZE__ */ "\n\ 3:\n\ " PRELOADSTR ("%1") "\n\ sub %2, %2, #1\n\ cmn %2, #1\n\ beq 1f\n\ 0:\n\ sub %2, %2, #1\n\ ldrb r3, [%1], #1\n\ " PRELOADSTR ("%1") "\n\ cmn %2, #1\n\ strb r3, [%0], #1\n\ bne 0b\n\ 1:" : "=&r" (dummy), "=&r" (src0), "=&r" (len) : "0" (dst0), "1" (src0), "2" (len) : "memory", "lr", "r3", "r4", "r5", "cc"); return dst0; } #endif
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