c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-23 19:04:45 +03:00
Code Issues Packages Projects Releases Wiki Activity

Add atomic_sub_* functions to libspl.

Browse Source 
Both the SPL and the ZFS libspl export most of the atomic_* functions,
except atomic_sub_* functions which are only exported by the SPL, not by
libspl. This patch remedies that by implementing atomic_sub_* functions
in libspl.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1013
This commit is contained in:
Etienne Dechamps
2012-06-27 10:26:49 +02:00
committed by Brian Behlendorf
parent 82f46731fd
commit 142e6dd100
4 changed files with 284 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/libspl/asm-x86_64/atomic.S
+92
View File
@@ -232,6 +232,40 @@
SET_SIZE(atomic_add_ptr)
SET_SIZE(atomic_add_64)
ENTRY(atomic_sub_8)
ALTENTRY(atomic_sub_char)
lock
subb %sil, (%rdi)
ret
SET_SIZE(atomic_sub_char)
SET_SIZE(atomic_sub_8)
ENTRY(atomic_sub_16)
ALTENTRY(atomic_sub_short)
lock
subw %si, (%rdi)
ret
SET_SIZE(atomic_sub_short)
SET_SIZE(atomic_sub_16)
ENTRY(atomic_sub_32)
ALTENTRY(atomic_sub_int)
lock
subl %esi, (%rdi)
ret
SET_SIZE(atomic_sub_int)
SET_SIZE(atomic_sub_32)
ENTRY(atomic_sub_64)
ALTENTRY(atomic_sub_ptr)
ALTENTRY(atomic_sub_long)
lock
subq %rsi, (%rdi)
ret
SET_SIZE(atomic_sub_long)
SET_SIZE(atomic_sub_ptr)
SET_SIZE(atomic_sub_64)
ENTRY(atomic_or_8)
ALTENTRY(atomic_or_uchar)
lock
@@ -354,6 +388,64 @@
SET_SIZE(atomic_add_ptr_nv)
SET_SIZE(atomic_add_64_nv)
ENTRY(atomic_sub_8_nv)
ALTENTRY(atomic_sub_char_nv)
movb (%rdi), %al
1:
movb %sil, %cl
subb %al, %cl
lock
cmpxchgb %cl, (%rdi)
jne 1b
movzbl %cl, %eax
ret
SET_SIZE(atomic_sub_char_nv)
SET_SIZE(atomic_sub_8_nv)
ENTRY(atomic_sub_16_nv)
ALTENTRY(atomic_sub_short_nv)
movw (%rdi), %ax
1:
movw %si, %cx
subw %ax, %cx
lock
cmpxchgw %cx, (%rdi)
jne 1b
movzwl %cx, %eax
ret
SET_SIZE(atomic_sub_short_nv)
SET_SIZE(atomic_sub_16_nv)
ENTRY(atomic_sub_32_nv)
ALTENTRY(atomic_sub_int_nv)
movl (%rdi), %eax
1:
movl %esi, %ecx
subl %eax, %ecx
lock
cmpxchgl %ecx, (%rdi)
jne 1b
movl %ecx, %eax
ret
SET_SIZE(atomic_sub_int_nv)
SET_SIZE(atomic_sub_32_nv)
ENTRY(atomic_sub_64_nv)
ALTENTRY(atomic_sub_ptr_nv)
ALTENTRY(atomic_sub_long_nv)
movq (%rdi), %rax
1:
movq %rsi, %rcx
subq %rax, %rcx
lock
cmpxchgq %rcx, (%rdi)
jne 1b
movq %rcx, %rax
ret
SET_SIZE(atomic_sub_long_nv)
SET_SIZE(atomic_sub_ptr_nv)
SET_SIZE(atomic_sub_64_nv)
ENTRY(atomic_and_8_nv)
ALTENTRY(atomic_and_uchar_nv)
movb (%rdi), %al