diff options
Diffstat (limited to 'src/vm/instruction.test.js')
| -rw-r--r-- | src/vm/instruction.test.js | 53 |
1 files changed, 52 insertions, 1 deletions
diff --git a/src/vm/instruction.test.js b/src/vm/instruction.test.js index 7bd2068..63112fb 100644 --- a/src/vm/instruction.test.js +++ b/src/vm/instruction.test.js @@ -1,7 +1,7 @@ 'use strict'; const { Core } = require('./core.js'); -const { DAT, MOV, ADD, SUB } = require('./instruction.js'); +const { DAT, MOV, ADD, SUB, CMP } = require('./instruction.js'); const CORESIZE = 8000; @@ -243,3 +243,54 @@ test('SUB correctly subtracts B-field', () => { b: { mode: 'immediate', value: 3 }, }); }); + + +test('CMP properly compares full instructions', () => { + const core = new Core(CORESIZE); + const pc = 20; + core.data[pc] = { + opcode: 'CMP', + a: { mode: 'direct', value: 1 }, + b: { mode: 'direct', value: 2 }, + }; + core.data[pc+1] = { + opcode: 'DAT', + a: { mode: 'immediate', value: 10 }, + b: { mode: 'immediate', value: 20 }, + }; + core.data[pc+2] = { + opcode: 'DAT', + a: { mode: 'immediate', value: 3 }, + b: { mode: 'immediate', value: 4 }, + }; + const ins = core.data[pc]; + + expect(CMP(core, pc, ins)).toEqual([pc+1]); + + core.data[pc+2] = JSON.parse(JSON.stringify(core.data[pc+1])); + + expect(CMP(core, pc, ins)).toEqual([pc+2]); +}); + + +test('CMP properly compares B-field', () => { + const core = new Core(CORESIZE); + const pc = 20; + core.data[pc] = { + opcode: 'CMP', + a: { mode: 'immediate', value: 1 }, + b: { mode: 'direct', value: 2 }, + }; + core.data[pc+2] = { + opcode: 'DAT', + a: { mode: 'immediate', value: 3 }, + b: { mode: 'immediate', value: 4 }, + }; + const ins = core.data[pc]; + + expect(CMP(core, pc, ins)).toEqual([pc+1]); + + core.data[pc+2].b.value = 1; + + expect(CMP(core, pc, ins)).toEqual([pc+2]); +}); |