diff options
Diffstat (limited to 'newlib/libc/machine/xscale/memset.c')
-rw-r--r-- | newlib/libc/machine/xscale/memset.c | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/newlib/libc/machine/xscale/memset.c b/newlib/libc/machine/xscale/memset.c deleted file mode 100644 index 4ff8d01e0..000000000 --- a/newlib/libc/machine/xscale/memset.c +++ /dev/null @@ -1,89 +0,0 @@ -#if defined __thumb__ - -#include "../../string/memset.c" - -#else - -#include <string.h> -#include "xscale.h" - -void * -memset (void *dst, int c, size_t len) -{ - int dummy; - - asm volatile ("tst %0, #0x3" -#ifndef __OPTIMIZE_SIZE__ -"\n\ - beq 1f\n\ - b 2f\n\ -0:\n\ - strb %1, [%0], #1\n\ - tst %0, #0x3\n\ - beq 1f\n\ -2:\n\ - movs r3, %2\n\ - sub %2, %2, #1\n\ - bne 0b\n\ -# At this point we know that %2 == len == -1 (since the SUB has already taken\n\ -# place). If we fall through to the 1: label (as the code used to do), the\n\ -# CMP will detect this negative value and branch to the 2: label. This will\n\ -# test %2 again, but this time against 0. The test will fail and the loop\n\ -# at 2: will go on for (almost) ever. Hence the explicit branch to the end\n\ -# of the hand written assembly code.\n\ - b 4f\n\ -1:\n\ - cmp %2, #0x3\n\ - bls 2f\n\ - and %1, %1, #0xff\n\ - orr lr, %1, %1, asl #8\n\ - cmp %2, #0xf\n\ - orr lr, lr, lr, asl #16\n\ - bls 1f\n\ - mov r3, lr\n\ - mov r4, lr\n\ - mov r5, lr\n\ -0:\n\ - sub %2, %2, #16\n\ - stmia %0!, { r3, r4, r5, lr }\n\ - cmp %2, #0xf\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x7\n\ - bls 1f\n\ - mov r3, lr\n\ -0:\n\ - sub %2, %2, #8\n\ - stmia %0!, { r3, lr }\n\ - cmp %2, #0x7\n\ - bhi 0b\n\ -1:\n\ - cmp %2, #0x3\n\ - bls 2f\n\ -0:\n\ - sub %2, %2, #4\n\ - str lr, [%0], #4\n\ - cmp %2, #0x3\n\ - bhi 0b\n\ -" -#endif /* !__OPTIMIZE_SIZE__ */ -"\n\ -2:\n\ - movs r3, %2\n\ - sub %2, %2, #1\n\ - beq 4f\n\ -0:\n\ - movs r3, %2\n\ - sub %2, %2, #1\n\ - strb %1, [%0], #1\n\ - bne 0b\n\ -4:" - - : "=&r" (dummy), "=&r" (c), "=&r" (len) - : "0" (dst), "1" (c), "2" (len) - : "memory", "r3", "r4", "r5", "lr"); - - return dst; -} - -#endif |