diff options
| author | sanine <sanine.not@pm.me> | 2023-05-23 00:29:12 -0500 |
|---|---|---|
| committer | sanine <sanine.not@pm.me> | 2023-05-23 00:29:12 -0500 |
| commit | cf71a97881e170fa018bf5fd0f02cdb13b874af8 (patch) | |
| tree | 02e4a2dbd495498543cce85fd040d0d468cc3df0 /src/vm/instruction.js | |
| parent | 19a297f42a2f321ead4c03290d38a8ccdbf8dc18 (diff) | |
implement SUB
Diffstat (limited to 'src/vm/instruction.js')
| -rw-r--r-- | src/vm/instruction.js | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/vm/instruction.js b/src/vm/instruction.js index c9048e1..146a88b 100644 --- a/src/vm/instruction.js +++ b/src/vm/instruction.js @@ -37,3 +37,18 @@ exports.ADD = function(core, pc, ins) { return [pc + 1]; } + + +exports.SUB = function(core, pc, ins) { + if (ins.a.mode === AddrMode.Immediate) { + const dst = core.getValue(pc, ins.b); + dst.b.value -= ins.a.value; + } else { + const src = core.getValue(pc, ins.a); + const dst = core.getValue(pc, ins.b); + dst.a.value -= src.a.value; + dst.b.value -= src.b.value; + } + + return [pc + 1]; +} |