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TST
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Logical test
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TST
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TeST logical
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[Syntax]
TST src, src2
[Operation]
src2 & src;
[Function]
- | This instruction changes the flag states in the PSW according to the result of logical AND of src2 and src. |
[Instruction Format]
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TST src, src2
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#SIMM:8
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Rs
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#SIMM:16
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Rs
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#SIMM:24
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Rs
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#IMM:32
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Rs
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Rs
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Rs2
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[Rs].memex
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Rs2
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dsp:8[Rs].memex
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Rs2
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dsp:16[Rs].memex
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Rs2
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[Flag Change]
Conditions
Z : The flag is set if the result of the operation is 0; otherwise it is cleared.
O : The flag is set if the MSB of the result of the operation is 1; otherwise it is cleared.
[Description Example]
TST #7, R2
TST R1, R2
TST [R1], R2
TST 1[R1].UB, R2
