dirty fix to merging

1 files changed, 194 insertions, 0 deletions

diff --git a/arch/x86/lib/atomic64_386_32.S b/arch/x86/lib/atomic64_386_32.S
new file mode 100644
index 00000000..00933d5e
--- /dev/null
+++ b/arch/x86/lib/atomic64_386_32.S
@@ -0,0 +1,194 @@
+/*
+ * atomic64_t for 386/486
+ *
+ * Copyright © 2010  Luca Barbieri
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/linkage.h>
+#include <asm/alternative-asm.h>
+#include <asm/dwarf2.h>
+
+/* if you want SMP support, implement these with real spinlocks */
+.macro LOCK reg
+	pushfl_cfi
+	cli
+.endm
+
+.macro UNLOCK reg
+	popfl_cfi
+.endm
+
+#define BEGIN(op) \
+.macro endp; \
+	CFI_ENDPROC; \
+ENDPROC(atomic64_##op##_386); \
+.purgem endp; \
+.endm; \
+ENTRY(atomic64_##op##_386); \
+	CFI_STARTPROC; \
+	LOCK v;
+
+#define ENDP endp
+
+#define RET \
+	UNLOCK v; \
+	ret
+
+#define RET_ENDP \
+	RET; \
+	ENDP
+
+#define v %ecx
+BEGIN(read)
+	movl  (v), %eax
+	movl 4(v), %edx
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(set)
+	movl %ebx,  (v)
+	movl %ecx, 4(v)
+RET_ENDP
+#undef v
+
+#define v  %esi
+BEGIN(xchg)
+	movl  (v), %eax
+	movl 4(v), %edx
+	movl %ebx,  (v)
+	movl %ecx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(add)
+	addl %eax,  (v)
+	adcl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(add_return)
+	addl  (v), %eax
+	adcl 4(v), %edx
+	movl %eax,  (v)
+	movl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(sub)
+	subl %eax,  (v)
+	sbbl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %ecx
+BEGIN(sub_return)
+	negl %edx
+	negl %eax
+	sbbl $0, %edx
+	addl  (v), %eax
+	adcl 4(v), %edx
+	movl %eax,  (v)
+	movl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(inc)
+	addl $1,  (v)
+	adcl $0, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(inc_return)
+	movl  (v), %eax
+	movl 4(v), %edx
+	addl $1, %eax
+	adcl $0, %edx
+	movl %eax,  (v)
+	movl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(dec)
+	subl $1,  (v)
+	sbbl $0, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(dec_return)
+	movl  (v), %eax
+	movl 4(v), %edx
+	subl $1, %eax
+	sbbl $0, %edx
+	movl %eax,  (v)
+	movl %edx, 4(v)
+RET_ENDP
+#undef v
+
+#define v %esi
+BEGIN(add_unless)
+	addl %eax, %ecx
+	adcl %edx, %edi
+	addl  (v), %eax
+	adcl 4(v), %edx
+	cmpl %eax, %ecx
+	je 3f
+1:
+	movl %eax,  (v)
+	movl %edx, 4(v)
+	movl $1, %eax
+2:
+	RET
+3:
+	cmpl %edx, %edi
+	jne 1b
+	xorl %eax, %eax
+	jmp 2b
+ENDP
+#undef v
+
+#define v %esi
+BEGIN(inc_not_zero)
+	movl  (v), %eax
+	movl 4(v), %edx
+	testl %eax, %eax
+	je 3f
+1:
+	addl $1, %eax
+	adcl $0, %edx
+	movl %eax,  (v)
+	movl %edx, 4(v)
+	movl $1, %eax
+2:
+	RET
+3:
+	testl %edx, %edx
+	jne 1b
+	jmp 2b
+ENDP
+#undef v
+
+#define v %esi
+BEGIN(dec_if_positive)
+	movl  (v), %eax
+	movl 4(v), %edx
+	subl $1, %eax
+	sbbl $0, %edx
+	js 1f
+	movl %eax,  (v)
+	movl %edx, 4(v)
+1:
+RET_ENDP
+#undef v