66         ldmia   r12, { r1-r2 }                  // r1: IE, r2: IF  in OS_IrqHandler()
67         ands    r1, r1, r2                      // r1: IE & IF  in OS_IrqHandler()
100 @1:     ands    r2, r1, r3, LSL r0              // Count zero of high bit  in OS_IrqHandler()
105         str     r2, [ r12, #REG_IF_ADDR - REG_IE_ADDR ]  in OS_IrqHandler()
162         mov     r2,  #OS_THREAD_STATE_READY  in OS_IrqHandler_ThreadSwitch()
168         strne   r2,  [r12, #OS_THREAD_OFFSET_STATE]  in OS_IrqHandler_ThreadSwitch()
207         add     r2, r12, #OS_THREADINFO_OFFSET_LIST // r2 = &OSi_ThreadInfo.list  in OS_IrqHandler_ThreadSwitch()
208         ldr     r1, [r2]                            // r1 = *r2 = TopOfList  in OS_IrqHandler_ThreadSwitch()
247         mrs     r2, SPSR  in OS_IrqHandler_ThreadSwitch()
248         str     r2, [ r0, #OS_THREAD_OFFSET_CONTEXT ]!  // *r0=context:CPSR  in OS_IrqHandler_ThreadSwitch()
260         ldmib   sp!, { r2,r3 }          // Get R0,R1    // *sp=stack:R1  in OS_IrqHandler_ThreadSwitch()
261         stmib   r0!, { r2,r3 }          // Put R0,R1    // *r0=context:R1  in OS_IrqHandler_ThreadSwitch()
263         ldmib   sp!, { r2,r3,r12,r14 }  // Get R2,R3,R12,LR / *sp=stack:LR  in OS_IrqHandler_ThreadSwitch()
264         stmib   r0!, { r2-r14        }^ // Put R2-R14^  // *r0=context:R14  in OS_IrqHandler_ThreadSwitch()
298         ldr     r2, [ r1, #OS_THREAD_OFFSET_CONTEXT ]!  // *r1=context:CPSR  in OS_IrqHandler_ThreadSwitch()
299         msr     SPSR, r2                                // Put SPSR  in OS_IrqHandler_ThreadSwitch()