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rolc¶

rolc R¶

指令格式¶

rolc R

影响标志¶

C Z

伪指令¶

{C, R} = {R, C}
Z = R ? 0 : 1

指令描述¶

带状态C对寄存器R循环左移1位，结果存储到寄存器R；

范例¶

//0x74 << 1
//C = 1, AC = 0, Z = 0, OV = 0
mov     A, #0x74    //A = 0x74
mov     0xE0, A     //[0xE0] = 0x74
rolc    0xE0        //[0xE0] = 0xE9, C = 0, AC = 0, Z = 0, OV = 0

rolc A, R¶

指令格式¶

rolc A, R

影响标志¶

C Z

伪指令¶

{C, A} = {R, C}
Z = A ? 0 : 1

指令描述¶

带状态C对寄存器R循环左移1位，结果存储到累加器A；

范例¶

//0x85 << 1
//C = 0, AC = 0, Z = 0, OV = 0
mov     A, #0x85    //A = 0x85
mov     0xF2, A     //[0xF2] = 0x85
rolc    A, 0xF2     //A = 0x0A, C = 1, AC = 0, Z = 0, OV = 0