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-rw-r--r--sys/lib/libkern/arch/mips/bcopy.S96
1 files changed, 0 insertions, 96 deletions
diff --git a/sys/lib/libkern/arch/mips/bcopy.S b/sys/lib/libkern/arch/mips/bcopy.S
deleted file mode 100644
index 23b3bc0b328..00000000000
--- a/sys/lib/libkern/arch/mips/bcopy.S
+++ /dev/null
@@ -1,96 +0,0 @@
-/* $OpenBSD: bcopy.S,v 1.8 1998/03/01 16:10:24 niklas Exp $ */
-
-#include "DEFS.h"
-
-
-/*
- * memcpy(to, from, len)
- * {ov}bcopy(from, to, len)
- */
-LEAF(memcpy)
- .set noreorder
- move v0, a0 # swap from and to
- move a0, a1
- move a1, v0
-ALEAF(bcopy)
-ALEAF(ovbcopy)
- .set noreorder
- addu t0, a0, a2 # t0 = end of s1 region
- sltu t1, a1, t0
- sltu t2, a0, a1
- and t1, t1, t2 # t1 = true if from < to < (from+len)
- beq t1, zero, forward # non overlapping, do forward copy
- slt t2, a2, 12 # check for small copy
-
- ble a2, zero, 2f
- addu t1, a1, a2 # t1 = end of to region
-1:
- lb v1, -1(t0) # copy bytes backwards,
- subu t0, t0, 1 # doesnt happen often so do slow way
- subu t1, t1, 1
- bne t0, a0, 1b
- sb v1, 0(t1)
-2:
- j ra
- nop
-forward:
- bne t2, zero, smallcpy # do a small bcopy
- xor v1, a0, a1 # compare low two bits of addresses
- and v1, v1, 3
- subu a3, zero, a1 # compute # bytes to word align address
- beq v1, zero, aligned # addresses can be word aligned
- and a3, a3, 3
-
- beq a3, zero, 1f
- subu a2, a2, a3 # subtract from remaining count
- LWHI v1, 0(a0) # get next 4 bytes (unaligned)
- LWLO v1, 3(a0)
- addu a0, a0, a3
- SWHI v1, 0(a1) # store 1, 2, or 3 bytes to align a1
- addu a1, a1, a3
-1:
- and v1, a2, 3 # compute number of words left
- subu a3, a2, v1
- move a2, v1
- addu a3, a3, a0 # compute ending address
-2:
- LWHI v1, 0(a0) # copy words a0 unaligned, a1 aligned
- LWLO v1, 3(a0)
- addu a0, a0, 4
- sw v1, 0(a1)
- addu a1, a1, 4
- bne a0, a3, 2b
- nop # We have to do this mmu-bug.
- b smallcpy
- nop
-aligned:
- beq a3, zero, 1f
- subu a2, a2, a3 # subtract from remaining count
- LWHI v1, 0(a0) # copy 1, 2, or 3 bytes to align
- addu a0, a0, a3
- SWHI v1, 0(a1)
- addu a1, a1, a3
-1:
- and v1, a2, 3 # compute number of whole words left
- subu a3, a2, v1
- move a2, v1
- addu a3, a3, a0 # compute ending address
-2:
- lw v1, 0(a0) # copy words
- addu a0, a0, 4
- sw v1, 0(a1)
- bne a0, a3, 2b
- addu a1, a1, 4
-smallcpy:
- ble a2, zero, 2f
- addu a3, a2, a0 # compute ending address
-1:
- lbu v1, 0(a0) # copy bytes
- addu a0, a0, 1
- sb v1, 0(a1)
- bne a0, a3, 1b
- addu a1, a1, 1 # MMU BUG ? can not do -1(a1) at 0x80000000!!
-2:
- j ra
- nop
-END(memcpy)