diff options
Diffstat (limited to 'sysdeps/powerpc/memset.S')
| -rw-r--r-- | sysdeps/powerpc/memset.S | 39 |
1 files changed, 29 insertions, 10 deletions
diff --git a/sysdeps/powerpc/memset.S b/sysdeps/powerpc/memset.S index c48c0af7c8..2a09c24454 100644 --- a/sysdeps/powerpc/memset.S +++ b/sysdeps/powerpc/memset.S @@ -18,6 +18,8 @@ Boston, MA 02111-1307, USA. */ #include <sysdep.h> +#include <bp-sym.h> +#include <bp-asm.h> /* __ptr_t [r3] memset (__ptr_t s [r3], int c [r4], size_t n [r5])); Returns 's'. @@ -26,13 +28,21 @@ cache line (256 bits). There is a special case for setting cache lines to 0, to take advantage of the dcbz instruction. */ -EALIGN (memset, 5, 1) +EALIGN (BP_SYM (memset), 5, 1) #define rTMP r0 -#define rRTN r3 /* initial value of 1st argument */ -#define rCHR r4 /* char to set in each byte */ -#define rLEN r5 /* length of region to set */ -#define rMEMP r6 /* address at which we are storing */ +#define rRTN r3 /* initial value of 1st argument */ +#if __BOUNDED_POINTERS__ +# define rMEMP0 r4 /* original value of 1st arg */ +# define rCHR r5 /* char to set in each byte */ +# define rLEN r6 /* length of region to set */ +# define rMEMP r10 /* address at which we are storing */ +#else +# define rMEMP0 r3 /* original value of 1st arg */ +# define rCHR r4 /* char to set in each byte */ +# define rLEN r5 /* length of region to set */ +# define rMEMP r6 /* address at which we are storing */ +#endif #define rALIGN r7 /* number of bytes we are setting now (when aligning) */ #define rMEMP2 r8 @@ -40,21 +50,30 @@ EALIGN (memset, 5, 1) #define rNEG64 r8 /* constant -64 for clearing with dcbz */ #define rNEG32 r9 /* constant -32 for clearing with dcbz */ +#if __BOUNDED_POINTERS__ + cmplwi cr1, rRTN, 0 + CHECK_BOUNDS_BOTH_WIDE (rMEMP0, rTMP, rTMP2, rLEN) + beq cr1, L(b0) + STORE_RETURN_VALUE (rMEMP0) + STORE_RETURN_BOUNDS (rTMP, rTMP2) +L(b0): +#endif + /* take care of case for size <= 4 */ cmplwi cr1, rLEN, 4 - andi. rALIGN, rRTN, 3 - mr rMEMP, rRTN + andi. rALIGN, rMEMP0, 3 + mr rMEMP, rMEMP0 ble- cr1, L(small) /* align to word boundary */ cmplwi cr5, rLEN, 31 rlwimi rCHR, rCHR, 8, 16, 23 beq+ L(aligned) /* 8th instruction from .align */ - mtcrf 0x01, rRTN + mtcrf 0x01, rMEMP0 subfic rALIGN, rALIGN, 4 add rMEMP, rMEMP, rALIGN sub rLEN, rLEN, rALIGN bf+ 31, L(g0) - stb rCHR, 0(rRTN) + stb rCHR, 0(rMEMP0) bt 30, L(aligned) L(g0): sth rCHR, -2(rMEMP) /* 16th instruction from .align */ /* take care of case for size < 31 */ @@ -207,4 +226,4 @@ L(medium_28t): stw rCHR, -4(rMEMP) stw rCHR, -8(rMEMP) blr -END(memset) +END (BP_SYM (memset)) |