X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=lib%2Flibspl%2Fasm-x86_64%2Fatomic.S;h=49c9b2ad153594db43b29591e1cf4daebca1814e;hb=a1d9543a39942be56879ca9338078afc77c25cea;hp=e321bf7321702c880605f1d6f262e1f62abf0ff8;hpb=a26baf285f71eb95f1eace8c79d12d647a694488;p=zfs.git

diff --git a/lib/libspl/asm-x86_64/atomic.S b/lib/libspl/asm-x86_64/atomic.S
index e321bf7..49c9b2a 100644
--- a/lib/libspl/asm-x86_64/atomic.S
+++ b/lib/libspl/asm-x86_64/atomic.S
@@ -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