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code cleanup for interrupt description

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Bernard Xiong
2013-03-26 08:52:33 +08:00
parent 17ab3fcdba
commit bb72be94b2
6 changed files with 276 additions and 261 deletions
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libcpu/arm/cortex-m3/cpuport.c
+12 -12
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@@ -162,28 +162,28 @@ void rt_hw_cpu_shutdown(void)
#if defined(__CC_ARM)
__asm int __rt_ffs(int value)
{
CMP r0, #0x00
BEQ exit
RBIT r0, r0
CLZ r0, r0
ADDS r0, r0, #0x01
CMP r0, #0x00
BEQ exit
RBIT r0, r0
CLZ r0, r0
ADDS r0, r0, #0x01
exit
BX lr
BX lr
}
#elif defined(__IAR_SYSTEMS_ICC__)
int __rt_ffs(int value)
{
if (value == 0) return value;
__ASM("RBIT r0, r0");
__ASM("CLZ r0, r0");
__ASM("ADDS r0, r0, #0x01");
if (value == 0) return value;
__ASM("RBIT r0, r0");
__ASM("CLZ r0, r0");
__ASM("ADDS r0, r0, #0x01");
}
#elif defined(__GNUC__)
int __rt_ffs(int value)
{
return __builtin_ffs(value);
return __builtin_ffs(value);
}
#endif