addc¶
addc A, R¶
指令格式¶
addc A, R
影响标志¶
C AC Z OV
伪指令¶
1 2 3 4 5 6 7 8 9 | bit T, H bit[4] L4 bit[3] H3 {AC, L4} = A[3:0] + R[3:0] + C {T, H3} = A[6:4] + R[6:4] + AC {C, H} = A[7] + R[7] + T OV = C ^ T A = {H, H3, L4} Z = A ? 0 : 1 |
指令描述¶
累加器A和寄存器R带进位加法，结果存储到累加器A；
范例¶
1 2 3 4 5 6 | //0xA8 + 0x69 //C = 0, AC = 0, Z = 0, OV = 0 mov A, #0x69 //A = 0x69 mov 0x90, A //[0x90] = 0x69 mov A, #0xA8 //A = 0xA8 addc A, 0x90 //A = 0x11, C = 1, AC = 1, Z = 0, OV = 0 |
addc R, A¶
指令格式¶
addc R, A
影响标志¶
C AC Z OV
伪指令¶
1 2 3 4 5 6 7 8 9 | bit T, H bit[4] L4 bit[3] H3 {AC, L4} = A[3:0] + R[3:0] + C {T, H3} = A[6:4] + R[6:4] + AC {C, H} = A[7] + R[7] + T OV = C ^ T R = {H, H3, L4} Z = R ? 0 : 1 |
指令描述¶
寄存器R和累加器A带进位加法，结果存储到寄存器R；
范例¶
1 2 3 4 5 | //0x80 + 0x80 //C = 0, AC = 0, Z = 0, OV = 0 mov A, #80 //A = 0x80 mov 0x91, A //[0x91] = 0x80 addc 0x91, A //[0x91] = 0x00, C = 1, AC = 0, Z = 1, OV = 1 |