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avoid need for -march=mips2 to compile mips atomic.h asm

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linux guarantees ll/sc are always available. on mips1, they will be
emulated by the kernel. thus they are part of the linux mips1 abi and
safe to use.
This commit is contained in:
Rich Felker 2012-08-11 19:51:21 -04:00
parent f997e224fc
commit 036eaa24cf
1 changed files with 8 additions and 0 deletions
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8
arch/mips/atomic.h
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@ -27,6 +27,7 @@ static inline int a_cas(volatile int *p, int t, int s)
int dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%2)\n"
" bne %0, %3, 1f\n"
@ -56,6 +57,7 @@ static inline int a_swap(volatile int *x, int v)
int old, dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%2)\n"
" addu %1, %3, $0\n"
@ -73,6 +75,7 @@ static inline int a_fetch_add(volatile int *x, int v)
int old, dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%2)\n"
" addu %1, %0, %3\n"
@ -90,6 +93,7 @@ static inline void a_inc(volatile int *x)
int dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%1)\n"
" addu %0, %0, 1\n"
@ -106,6 +110,7 @@ static inline void a_dec(volatile int *x)
int dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%1)\n"
" subu %0, %0, 1\n"
@ -122,6 +127,7 @@ static inline void a_store(volatile int *p, int x)
int dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%1)\n"
" addu %0, %2, $0\n"
@ -147,6 +153,7 @@ static inline void a_and(volatile int *p, int v)
int dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%1)\n"
" and %0, %0, %2\n"
@ -163,6 +170,7 @@ static inline void a_or(volatile int *p, int v)
int dummy;
__asm__ __volatile__(
".set push\n"
".set mips2\n"
".set noreorder\n"
"1: ll %0, 0(%1)\n"
" or %0, %0, %2\n"