72         ldr     r1, [ r12, #REG_IME_ADDR - REG_IE_ADDR ]  // r1: IME  in OS_IrqHandler()
75         cmp     r1, #0  in OS_IrqHandler()
79         ldmia   r12, { r1-r2 }                  // r1: IE, r2: IF  in OS_IrqHandler()
80         ands    r1, r1, r2                      // r1: IE & IF  in OS_IrqHandler()
93 @1:     clz     r0, r1                  // Count zero of high bit  in OS_IrqHandler()
94         bics    r1, r1, r3, LSR r0  in OS_IrqHandler()
98         mov     r1, r3, LSR r0  in OS_IrqHandler()
99         str     r1, [ r12, #REG_IF_ADDR - REG_IE_ADDR ]  in OS_IrqHandler()
109 @1:     ands    r2, r1, r3, LSL r0              // Count zero of high bit  in OS_IrqHandler()
122         ldr     r1, =OS_IRQTable  in OS_IrqHandler()
123         ldr     r0, [ r1, r0, LSL #2 ]  in OS_IrqHandler()
168            mov             r1, #1  in OS_IrqHandler_ThreadSwitch()
169            strh            r1, [ r12, #OS_THREADINFO_OFFSET_ISNEEDRESCHEDULING ]  in OS_IrqHandler_ThreadSwitch()
196         ldrh    r1, [ r12, #OS_THREADINFO_OFFSET_ISNEEDRESCHEDULING ]  in OS_IrqHandler_ThreadSwitch()
197         cmp     r1, #0  in OS_IrqHandler_ThreadSwitch()
200         mov     r1, #0  in OS_IrqHandler_ThreadSwitch()
201         strh    r1, [ r12, #OS_THREADINFO_OFFSET_ISNEEDRESCHEDULING ]  in OS_IrqHandler_ThreadSwitch()
208         ldr     r1, [r2]                            // r1 = *r2 = TopOfList  in OS_IrqHandler_ThreadSwitch()
210         cmp     r1, #0  in OS_IrqHandler_ThreadSwitch()
211         ldrneh  r0, [ r1, #OS_THREAD_OFFSET_STATE ] // r0 = t->state  in OS_IrqHandler_ThreadSwitch()
213         ldrne   r1, [ r1, #OS_THREAD_OFFSET_NEXT ]  in OS_IrqHandler_ThreadSwitch()
216         cmp     r1, #0  in OS_IrqHandler_ThreadSwitch()
230         cmp     r1, r0  in OS_IrqHandler_ThreadSwitch()
237         stmfd   sp!, { r0, r1, r12 }  in OS_IrqHandler_ThreadSwitch()
240         ldmfd   sp!, { r0, r1, r12 }  in OS_IrqHandler_ThreadSwitch()
244         str     r1, [ r12, #OS_THREADINFO_OFFSET_CURRENT ]  in OS_IrqHandler_ThreadSwitch()
254         stmfd   sp!, { r0, r1 }  in OS_IrqHandler_ThreadSwitch()
257         ldr     r1, =CP_SaveContext  in OS_IrqHandler_ThreadSwitch()
258         blx     r1  in OS_IrqHandler_ThreadSwitch()
259         ldmfd   sp!, { r0, r1 }  in OS_IrqHandler_ThreadSwitch()
277         stmfd   sp!, { r1 }  in OS_IrqHandler_ThreadSwitch()
278         add     r0, r1, #OS_THREAD_OFFSET_CONTEXT  in OS_IrqHandler_ThreadSwitch()
280         ldr     r1, =CPi_RestoreContext  in OS_IrqHandler_ThreadSwitch()
281         blx     r1  in OS_IrqHandler_ThreadSwitch()
283         ldmfd   sp!, { r1 }  in OS_IrqHandler_ThreadSwitch()
289         ldr     sp, [ r1, #OS_THREAD_OFFSET_CONTEXT+OS_CONTEXT_SP_SVC ]  in OS_IrqHandler_ThreadSwitch()
294         ldr     r2, [ r1, #OS_THREAD_OFFSET_CONTEXT ]!  // *r1=context:CPSR  in OS_IrqHandler_ThreadSwitch()
297         ldr     r14, [ r1, #OS_CONTEXT_PC_PLUS4 - OS_CONTEXT_CPSR ]   // Get R15  in OS_IrqHandler_ThreadSwitch()
298         ldmib   r1, { r0-r14 }^         // Get R0-R14^  // *r1=over written  in OS_IrqHandler_ThreadSwitch()