Difference between revisions of "GSWD"
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<tr><td>Mnemonic</td><td>GSWD</td></tr> | <tr><td>Mnemonic</td><td>GSWD</td></tr> | ||
<tr><td>CP1610 Clock Cycles</td><td>6</td></tr> | <tr><td>CP1610 Clock Cycles</td><td>6</td></tr> | ||
| − | <tr><td>Interruptible</td><td> | + | <tr><td>Interruptible</td><td>Yes</td></tr> |
<tr><td>Opcode Range</td><td>$0030-$0033</td></tr> | <tr><td>Opcode Range</td><td>$0030-$0033</td></tr> | ||
</table><br/> | </table><br/> | ||
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After the GSWD instruction is executed, the specified register will contain the values of S, Z, O, and C in the format as follows.<br/> | After the GSWD instruction is executed, the specified register will contain the values of S, Z, O, and C in the format as follows.<br/> | ||
| − | + | szoc:0000:szoc:0000<br/> | |
where: | where: | ||
| − | + | s indicates the value of the [[Sign Flag]] | |
| − | + | z indicates the value of the [[Zero Flag]] | |
| − | + | o indicates the value of the [[Overflow Flag]] | |
| − | + | c indicates the value of the [[Carry Flag]] | |
Revision as of 21:49, 11 January 2005
| Instruction Name | Get Status Word |
| Mnemonic | GSWD |
| CP1610 Clock Cycles | 6 |
| Interruptible | Yes |
| Opcode Range | $0030-$0033 |
The Get Status Word (GSWD) instruction retrieves the Sign Flag, Zero Flag, Overflow Flag, and Carry Flag and places them into the register specified. The opcode format is as follows.
0000:0000:0011:00rr
where: rr indicates the target register such that: rr == 00 indicates register R0 rr == 01 indicates register R1 rr == 10 indicates register R2 rr == 11 indicates register R3
After the GSWD instruction is executed, the specified register will contain the values of S, Z, O, and C in the format as follows.
szoc:0000:szoc:0000
where: s indicates the value of the Sign Flag z indicates the value of the Zero Flag o indicates the value of the Overflow Flag c indicates the value of the Carry Flag
