diff options
Diffstat (limited to 'sysdeps/mips/memcpy.S')
| -rw-r--r-- | sysdeps/mips/memcpy.S | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/sysdeps/mips/memcpy.S b/sysdeps/mips/memcpy.S index 1e9130f6bd..05d209739e 100644 --- a/sysdeps/mips/memcpy.S +++ b/sysdeps/mips/memcpy.S @@ -54,12 +54,14 @@ ENTRY (memcpy) SWHI t0, 0(a0) addu a0, t1 -L(chk8w): andi t0, a2, 0x1f # 32 or more bytes left? +L(chk8w): + andi t0, a2, 0x1f # 32 or more bytes left? beq t0, a2, L(chk1w) subu a3, a2, t0 # Yes addu a3, a1 # a3 = end address of loop move a2, t0 # a2 = what will be left after loop -L(lop8w): lw t0, 0(a1) # Loop taking 8 words at a time +L(lop8w): + lw t0, 0(a1) # Loop taking 8 words at a time lw t1, 4(a1) lw t2, 8(a1) lw t3, 12(a1) @@ -79,28 +81,34 @@ L(lop8w): lw t0, 0(a1) # Loop taking 8 words at a time bne a1, a3, L(lop8w) sw t7, -4(a0) -L(chk1w): andi t0, a2, 0x3 # 4 or more bytes left? +L(chk1w): + andi t0, a2, 0x3 # 4 or more bytes left? beq t0, a2, L(last8) subu a3, a2, t0 # Yes, handle them one word at a time addu a3, a1 # a3 again end address move a2, t0 -L(lop1w): lw t0, 0(a1) +L(lop1w): + lw t0, 0(a1) addiu a0, 4 addiu a1, 4 bne a1, a3, L(lop1w) sw t0, -4(a0) -L(last8): blez a2, L(lst8e) # Handle last 8 bytes, one at a time +L(last8): + blez a2, L(lst8e) # Handle last 8 bytes, one at a time addu a3, a2, a1 -L(lst8l): lb t0, 0(a1) +L(lst8l): + lb t0, 0(a1) addiu a0, 1 addiu a1, 1 bne a1, a3, L(lst8l) sb t0, -1(a0) -L(lst8e): jr ra # Bye, bye +L(lst8e): + jr ra # Bye, bye nop -L(shift): subu a3, zero, a0 # Src and Dest unaligned +L(shift): + subu a3, zero, a0 # Src and Dest unaligned andi a3, 0x3 # (unoptimized case...) beq a3, zero, L(shft1) subu a2, a3 # a2 = bytes left @@ -109,16 +117,18 @@ L(shift): subu a3, zero, a0 # Src and Dest unaligned addu a1, a3 SWHI t0, 0(a0) addu a0, a3 -L(shft1): andi t0, a2, 0x3 +L(shft1): + andi t0, a2, 0x3 subu a3, a2, t0 addu a3, a1 -L(shfth): LWHI t1, 0(a1) # Limp through, word by word +L(shfth): + LWHI t1, 0(a1) # Limp through, word by word LWLO t1, 3(a1) addiu a0, 4 addiu a1, 4 bne a1, a3, L(shfth) sw t1, -4(a0) - b L(last8) # Handle anything which may be left + b L(last8) # Handle anything which may be left move a2, t0 .set reorder |