diff options
Diffstat (limited to 'usr/src')
| -rw-r--r-- | usr/src/lib/libc_psr/sun4v_hwcap1/common/memcpy.s | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/usr/src/lib/libc_psr/sun4v_hwcap1/common/memcpy.s b/usr/src/lib/libc_psr/sun4v_hwcap1/common/memcpy.s index c9f81dbe4c..d5f63753ad 100644 --- a/usr/src/lib/libc_psr/sun4v_hwcap1/common/memcpy.s +++ b/usr/src/lib/libc_psr/sun4v_hwcap1/common/memcpy.s @@ -232,8 +232,20 @@ forcpy: cmp %o2, 17 ! for small counts copy bytes bleu,pt %ncc, .dbytecp nop - cmp %o2, 0x80 ! For lengths less than 128 bytes - bgu,pn %ncc, .blkalgndst ! no block st/quad ld + + cmp %o2, 0x80 ! For lengths less than 128 bytes no + bleu,pn %ncc, .no_blkcpy ! copy using ASI_BLK_INIT_ST_QUAD_LDD_P + + /* + * Make sure that source and destination buffers are 64 bytes apart. + * If they are not, do not use ASI_BLK_INIT_ST_QUAD_LDD_P asi to copy + * the data. + */ + subcc %o1, %o0, %o3 + blu %ncc, .blkalgndst + cmp %o3, 0x40 ! if src - dst >= 0x40 + bgeu,pt %ncc, .blkalgndst ! then use ASI_BLK_INIT_ST_QUAD_LDD_P +.no_blkcpy: andcc %o1, 3, %o5 ! is src word aligned bz,pn %ncc, .aldst cmp %o5, 2 ! is src half-word aligned |