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 ad1fc74bc..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__ -" - beq 1f - b 2f -0: - strb %1, [%0], #1 - tst %0, #0x3 - beq 1f -2: - movs r3, %2 - sub %2, %2, #1 - bne 0b -# At this point we know that %2 == len == -1 (since the SUB has already taken -# place). If we fall through to the 1: label (as the code used to do), the -# CMP will detect this negative value and branch to the 2: label. This will -# test %2 again, but this time against 0. The test will fail and the loop -# at 2: will go on for (almost) ever. Hence the explicit branch to the end -# of the hand written assembly code. - b 4f -1: - cmp %2, #0x3 - bls 2f - and %1, %1, #0xff - orr lr, %1, %1, asl #8 - cmp %2, #0xf - orr lr, lr, lr, asl #16 - bls 1f - mov r3, lr - mov r4, lr - mov r5, lr -0: - sub %2, %2, #16 - stmia %0!, { r3, r4, r5, lr } - cmp %2, #0xf - bhi 0b -1: - cmp %2, #0x7 - bls 1f - mov r3, lr -0: - sub %2, %2, #8 - stmia %0!, { r3, lr } - cmp %2, #0x7 - bhi 0b -1: - cmp %2, #0x3 - bls 2f -0: - sub %2, %2, #4 - str lr, [%0], #4 - cmp %2, #0x3 - bhi 0b -" -#endif /* !__OPTIMIZE_SIZE__ */ -" -2: - movs r3, %2 - sub %2, %2, #1 - beq 4f -0: - movs r3, %2 - sub %2, %2, #1 - strb %1, [%0], #1 - bne 0b -4:" - - : "=&r" (dummy), "=&r" (c), "=&r" (len) - : "0" (dst), "1" (c), "2" (len) - : "memory", "r3", "r4", "r5", "lr"); - - return dst; -} - -#endif |