CMP - Revision history

Mr z: Protected "CMP" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

2010-12-04T08:08:33Z

Protected "CMP" ([edit=autoconfirmed] (indefinite) [move=autoconfirmed] (indefinite))

Pingaso at 16:51, 17 January 2005

2005-01-17T16:51:52Z

Pingaso at 19:57, 12 January 2005

2005-01-12T19:57:10Z

New page

[[Category:CP1610]]
<table border>
<tr><td>Instruction Name</td><td>Compare</td></tr>
<tr><td>Mnemonic</td><td>CMP</td></tr>
<tr><td>CP1610 Clock Cycles</td><td>10</td></tr>
<tr><td>Interruptible</td><td>Yes</td></tr>
<tr><td>Opcode Range</td><td>$0340-$0347</td></tr>
<tr><td>Input Flags</td><td>None</td></tr>
<tr><td>Output Flags</td><td>[[Sign Flag]], [[Zero Flag]], [[Overflow Flag]], [[Carry Flag]]</td></tr>
</table><br/>
The Compare (CMP) instruction is functionally identical to the [[Subtract]] instruction except that it does not store the resulting value in the destination register. The Compare instruction subtracts the value at the specified address from the value in the specified destination register and sets or clears the [[Sign Flag]], [[Zero Flag]], [[Overflow Flag]], and [[Carry Flag]] according to the result, but the final result is not stored in the destination register, leaving the register unchanged.<br/>

Format - Decle #1 Format - Word #2
0000:0011:0100:0rrr aaaa:aaaa:aaaa:aaaa<br/>
where:
rrr indicates the destination register
such that:
rrr == 000 indicates register R0
rrr == 001 indicates register R1
rrr == 010 indicates register R2
rrr == 011 indicates register R3
rrr == 100 indicates register R4
rrr == 101 indicates register R5
rrr == 110 indicates register R6
rrr == 111 indicates register R7<br/>
aaaaaaaaaaaaaaaa indicates the source address

← Older revision	Revision as of 08:08, 4 December 2010
(No difference)

@@ Line 9: / Line 9: @@
 <tr><td>Output Flags</td><td>[[Sign Flag]], [[Zero Flag]], [[Overflow Flag]], [[Carry Flag]]</td></tr>
 </table><br/>
-The Compare (CMP) instruction is functionally identical to the [[Subtract]] instruction except that it does not store the resulting value in the destination register. The Compare instruction subtracts the value at the specified address from the value in the specified destination register and sets or clears the [[Sign Flag]], [[Zero Flag]], [[Overflow Flag]], and [[Carry Flag]] according to the result, but the final result is not stored in the destination register, leaving the register unchanged.<br/>
+The Compare (CMP) instruction is functionally identical to the [[SUB|Subtract]] instruction except that it does not store the resulting value in the destination register. The Compare instruction subtracts the value at the specified address from the value in the specified destination register and sets or clears the [[Sign Flag]], [[Zero Flag]], [[Overflow Flag]], and [[Carry Flag]] according to the result, but the final result is not stored in the destination register, leaving the register unchanged.<br/>
      Format - Decle #1    Format - Word #2