diff options
Diffstat (limited to 'newlib/libc')
| -rw-r--r-- | newlib/libc/machine/arc/memcpy-archs.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/newlib/libc/machine/arc/memcpy-archs.S b/newlib/libc/machine/arc/memcpy-archs.S index 2673cee98..84e766ad8 100644 --- a/newlib/libc/machine/arc/memcpy-archs.S +++ b/newlib/libc/machine/arc/memcpy-archs.S @@ -69,6 +69,7 @@ # define ZOLAND 0xF #endif +#ifdef __ARC_ALIGNED_ACCESS__ ENTRY (memcpy) prefetch [r1] ; Prefetch the read location prefetchw [r0] ; Prefetch the write location @@ -263,6 +264,64 @@ ENTRY (memcpy) j [blink] ENDFUNC (memcpy) + +#else + +ENTRY(memcpy) + prefetch [r1] ; Prefetch the read location + prefetchw [r0] ; Prefetch the write location + mov.f 0, r2 +;;; if size is zero + jz.d [blink] + mov r3, r0 ; don't clobber ret val + +;;; if size <= 8 + cmp r2, 8 + bls.d @.Lsmallchunk + mov.f lp_count, r2 + +;;; Convert len to Dwords, unfold x4 + lsr.f lp_count, r2, ZOLSHFT + lpnz @.Lcopyfast + ;; LOOP START + LOADX (r6, r1) + PREFETCH_READ (r1) + PREFETCH_WRITE (r3) + LOADX (r8, r1) + LOADX (r10, r1) + LOADX (r4, r1) + STOREX (r6, r3) + STOREX (r8, r3) + STOREX (r10, r3) + STOREX (r4, r3) +.Lcopyfast: + +#ifdef __ARC_LL64__ + and r2, r2, ZOLAND ;Remaining 31 bytes + lsr.f lp_count, r2, 3 ;Convert to 64-bit words. + lpnz @.Lcopy64b + ;; LOOP START + ldd.ab r6,[r1,8] + std.ab r6,[r3,8] +.Lcopy64b: + + and.f lp_count, r2, 0x07 ; Last 7 bytes +#else + and.f lp_count, r2, ZOLAND +#endif + +.Lsmallchunk: + lpnz @.Lcopyremainingbytes + ;; LOOP START + ldb.ab r5, [r1,1] + stb.ab r5, [r3,1] +.Lcopyremainingbytes: + + j [blink] + +ENDFUNC(memcpy) +#endif + #endif /* __ARCHS__ */ #endif /* !__OPTIMIZE_SIZE__ && !PREFER_SIZE_OVER_SPEED */ |