Author: mjg
Date: Fri Jun 8 04:18:42 2018
New Revision: 334826
URL: https://svnweb.freebsd.org/changeset/base/334826
Log:
amd64: remove now unused bzero, bcmp and bcopy. move pagecopy higher up.
Modified:
head/sys/amd64/amd64/support.S
Modified: head/sys/amd64/amd64/support.S
==============================================================================
--- head/sys/amd64/amd64/support.S Fri Jun 8 03:22:39 2018
(r334825)
+++ head/sys/amd64/amd64/support.S Fri Jun 8 04:18:42 2018
(r334826)
@@ -40,37 +40,31 @@
.text
-/*
- * bcopy family
- * void bzero(void *buf, u_int len)
- */
-
-/* done */
-ENTRY(bzero)
+/* Address: %rdi */
+ENTRY(pagezero)
PUSH_FRAME_POINTER
- movq %rsi,%rcx
+ movq $PAGE_SIZE/8,%rcx
xorl %eax,%eax
- shrq $3,%rcx
rep
stosq
- movq %rsi,%rcx
- andq $7,%rcx
- rep
- stosb
POP_FRAME_POINTER
ret
-END(bzero)
+END(pagezero)
-/* Address: %rdi */
-ENTRY(pagezero)
+/*
+ * pagecopy(%rdi=from, %rsi=to)
+ */
+ENTRY(pagecopy)
PUSH_FRAME_POINTER
movq $PAGE_SIZE/8,%rcx
- xorl %eax,%eax
+ movq %rdi,%r9
+ movq %rsi,%rdi
+ movq %r9,%rsi
rep
- stosq
+ movsq
POP_FRAME_POINTER
ret
-END(pagezero)
+END(pagecopy)
/* Address: %rdi */
ENTRY(sse2_pagezero)
@@ -96,95 +90,7 @@ ENTRY(sse2_pagezero)
ret
END(sse2_pagezero)
-ENTRY(bcmp)
- PUSH_FRAME_POINTER
- test %rdx,%rdx
- je 1f
- cmpq $64,%rdx
- jg 4f
-
- xor %ecx,%ecx
-2:
- movzbl (%rdi,%rcx,1),%eax
- movzbl (%rsi,%rcx,1),%r8d
- cmp %r8b,%al
- jne 3f
- add $0x1,%rcx
- cmp %rcx,%rdx
- jne 2b
-1:
- xor %eax,%eax
- POP_FRAME_POINTER
- retq
-3:
- mov $1,%eax
- POP_FRAME_POINTER
- retq
-4:
- movq %rdx,%rcx
- shrq $3,%rcx
- repe
- cmpsq
- jne 5f
-
- movq %rdx,%rcx
- andq $7,%rcx
- repe
- cmpsb
-5:
- setne %al
- movsbl %al,%eax
- POP_FRAME_POINTER
- ret
-END(bcmp)
-
/*
- * bcopy(src, dst, cnt)
- * rdi, rsi, rdx
- * w...@tools.de (Wolfgang Solfrank, TooLs GmbH) +49-228-985800
- */
-ENTRY(bcopy)
- PUSH_FRAME_POINTER
- xchgq %rsi,%rdi
- movq %rdx,%rcx
-
- movq %rdi,%rax
- subq %rsi,%rax
- cmpq %rcx,%rax /* overlapping && src < dst? */
- jb 1f
-
- shrq $3,%rcx /* copy by 64-bit words */
- rep
- movsq
- movq %rdx,%rcx
- andq $7,%rcx /* any bytes left? */
- rep
- movsb
- POP_FRAME_POINTER
- ret
-
- /* ALIGN_TEXT */
-1:
- addq %rcx,%rdi /* copy backwards */
- addq %rcx,%rsi
- decq %rdi
- decq %rsi
- andq $7,%rcx /* any fractional bytes? */
- std
- rep
- movsb
- movq %rdx,%rcx /* copy remainder by 32-bit
words */
- shrq $3,%rcx
- subq $7,%rsi
- subq $7,%rdi
- rep
- movsq
- cld
- POP_FRAME_POINTER
- ret
-END(bcopy)
-
-/*
* memmove(dst, src, cnt)
* rdi, rsi, rdx
* Adapted from bcopy written by:
@@ -290,21 +196,6 @@ ENTRY(memset)
POP_FRAME_POINTER
ret
END(memset)
-
-/*
- * pagecopy(%rdi=from, %rsi=to)
- */
-ENTRY(pagecopy)
- PUSH_FRAME_POINTER
- movq $PAGE_SIZE/8,%rcx
- movq %rdi,%r9
- movq %rsi,%rdi
- movq %r9,%rsi
- rep
- movsq
- POP_FRAME_POINTER
- ret
-END(pagecopy)
/* fillw(pat, base, cnt) */
/* %rdi,%rsi, %rdx */
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