diff options
Diffstat (limited to 'arch/um/sys-i386/atomic64_cx8_32.S')
| -rw-r--r-- | arch/um/sys-i386/atomic64_cx8_32.S | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/arch/um/sys-i386/atomic64_cx8_32.S b/arch/um/sys-i386/atomic64_cx8_32.S deleted file mode 100644 index 1e901d3d4a9..00000000000 --- a/arch/um/sys-i386/atomic64_cx8_32.S +++ /dev/null @@ -1,225 +0,0 @@ -/* - * atomic64_t for 586+ - * - * Copied from arch/x86/lib/atomic64_cx8_32.S - * - * 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> - -.macro SAVE reg - pushl_cfi %\reg - CFI_REL_OFFSET \reg, 0 -.endm - -.macro RESTORE reg - popl_cfi %\reg - CFI_RESTORE \reg -.endm - -.macro read64 reg - movl %ebx, %eax - movl %ecx, %edx -/* we need LOCK_PREFIX since otherwise cmpxchg8b always does the write */ - LOCK_PREFIX - cmpxchg8b (\reg) -.endm - -ENTRY(atomic64_read_cx8) - CFI_STARTPROC - - read64 %ecx - ret - CFI_ENDPROC -ENDPROC(atomic64_read_cx8) - -ENTRY(atomic64_set_cx8) - CFI_STARTPROC - -1: -/* we don't need LOCK_PREFIX since aligned 64-bit writes - * are atomic on 586 and newer */ - cmpxchg8b (%esi) - jne 1b - - ret - CFI_ENDPROC -ENDPROC(atomic64_set_cx8) - -ENTRY(atomic64_xchg_cx8) - CFI_STARTPROC - - movl %ebx, %eax - movl %ecx, %edx -1: - LOCK_PREFIX - cmpxchg8b (%esi) - jne 1b - - ret - CFI_ENDPROC -ENDPROC(atomic64_xchg_cx8) - -.macro addsub_return func ins insc -ENTRY(atomic64_\func\()_return_cx8) - CFI_STARTPROC - SAVE ebp - SAVE ebx - SAVE esi - SAVE edi - - movl %eax, %esi - movl %edx, %edi - movl %ecx, %ebp - - read64 %ebp -1: - movl %eax, %ebx - movl %edx, %ecx - \ins\()l %esi, %ebx - \insc\()l %edi, %ecx - LOCK_PREFIX - cmpxchg8b (%ebp) - jne 1b - -10: - movl %ebx, %eax - movl %ecx, %edx - RESTORE edi - RESTORE esi - RESTORE ebx - RESTORE ebp - ret - CFI_ENDPROC -ENDPROC(atomic64_\func\()_return_cx8) -.endm - -addsub_return add add adc -addsub_return sub sub sbb - -.macro incdec_return func ins insc -ENTRY(atomic64_\func\()_return_cx8) - CFI_STARTPROC - SAVE ebx - - read64 %esi -1: - movl %eax, %ebx - movl %edx, %ecx - \ins\()l $1, %ebx - \insc\()l $0, %ecx - LOCK_PREFIX - cmpxchg8b (%esi) - jne 1b - -10: - movl %ebx, %eax - movl %ecx, %edx - RESTORE ebx - ret - CFI_ENDPROC -ENDPROC(atomic64_\func\()_return_cx8) -.endm - -incdec_return inc add adc -incdec_return dec sub sbb - -ENTRY(atomic64_dec_if_positive_cx8) - CFI_STARTPROC - SAVE ebx - - read64 %esi -1: - movl %eax, %ebx - movl %edx, %ecx - subl $1, %ebx - sbb $0, %ecx - js 2f - LOCK_PREFIX - cmpxchg8b (%esi) - jne 1b - -2: - movl %ebx, %eax - movl %ecx, %edx - RESTORE ebx - ret - CFI_ENDPROC -ENDPROC(atomic64_dec_if_positive_cx8) - -ENTRY(atomic64_add_unless_cx8) - CFI_STARTPROC - SAVE ebp - SAVE ebx -/* these just push these two parameters on the stack */ - SAVE edi - SAVE esi - - movl %ecx, %ebp - movl %eax, %esi - movl %edx, %edi - - read64 %ebp -1: - cmpl %eax, 0(%esp) - je 4f -2: - movl %eax, %ebx - movl %edx, %ecx - addl %esi, %ebx - adcl %edi, %ecx - LOCK_PREFIX - cmpxchg8b (%ebp) - jne 1b - - movl $1, %eax -3: - addl $8, %esp - CFI_ADJUST_CFA_OFFSET -8 - RESTORE ebx - RESTORE ebp - ret -4: - cmpl %edx, 4(%esp) - jne 2b - xorl %eax, %eax - jmp 3b - CFI_ENDPROC -ENDPROC(atomic64_add_unless_cx8) - -ENTRY(atomic64_inc_not_zero_cx8) - CFI_STARTPROC - SAVE ebx - - read64 %esi -1: - testl %eax, %eax - je 4f -2: - movl %eax, %ebx - movl %edx, %ecx - addl $1, %ebx - adcl $0, %ecx - LOCK_PREFIX - cmpxchg8b (%esi) - jne 1b - - movl $1, %eax -3: - RESTORE ebx - ret -4: - testl %edx, %edx - jne 2b - jmp 3b - CFI_ENDPROC -ENDPROC(atomic64_inc_not_zero_cx8) |