add¶
add A, #K¶
指令格式¶
add A, #K
影响标志¶
C AC Z OV
伪指令¶
bit T, H
bit[4] L4
bit[3] H3
{AC, L4} = A[3:0] + K[3:0]
{T, H3} = A[6:4] + K[6:4] + AC
{C, H} = A[7] + K[7] + T
OV = C ^ T
A = {H, H3, L4}
Z = A ? 0 : 1
指令描述¶
累加器A和立即数K加法，结果存储到累加器A。
范例¶
//C = 0, AC = 0, Z = 0, OV = 0
mov A, #0xE9 //A = 0xE9
add A, #0x1D //A = 0x06, C = 1, AC = 1, Z = 0, OV = 0
add A, R¶
指令格式¶
add A, R
影响标志¶
C AC Z OV |
伪指令¶
bit T, H
bit[4] L4
bit[3] H3
{AC, L4} = A[3:0] + R[3:0]
{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加法，结果存储到累加器A。
范例¶
//C = 0, AC = 0, Z = 0, OV = 0
mov A, #0xE0 //A = 0xE0
mov 0x80, A //[0x80] = 0xE0
mov A, #0x20 //A = 0x20
add A, 0x80 //A = 0x00, C = 1, AC = 0, Z = 1, OV = 0
add R, A¶
指令格式¶
add R, A
影响标志¶
C AC Z OV
伪指令¶
bit T, H
bit[4] L4
bit[3] H3
{AC, L4} = A[3:0] + R[3:0]
{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加法，结果存储到寄存器R。
范例¶
//C = 0, AC = 0, Z = 0, OV = 0
mov A, #0x6E //A = 0x6E
mov 0x90, A //[0x90] = 0x6E
mov A, #0x12 //A = 0x12
add 0x90, A //R = 0x80, C = 0, AC = 1, Z = 0, OV = 1