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Adds relational jumps.

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This commit is contained in:
Felix Queißner 2016-06-14 20:41:26 +02:00
parent 6de1a70574
commit e4b29f2c3c
1 changed files with 12 additions and 5 deletions
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documentation/supervm.md
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@ -213,6 +213,12 @@ The math command is a compound operator that contains all
ALU operations. The ALU operation is selected ALU operations. The ALU operation is selected
by the `cmdinfo`. by the `cmdinfo`.
If an ALU operation takes two operands, the right hand side is
defined by `input0`, the left hand side is defined by `input1`.
This allows a configuration such that the right hand side operand
is taken by the argument of the instruction instead of beeing popped
from the stack.
| cmdinfo | Operation | | cmdinfo | Operation |
|---------|-----------------------------| |---------|-----------------------------|
| 0 | Addition | | 0 | Addition |
@ -258,11 +264,12 @@ is set when the highest bit is set.
### Output ### Output
Each instruction can emit an output value. The output can be used in the following ways: Each instruction can emit an output value. The output can be used in the following ways:
| # | Output | Effect | | # | Output | Effect |
|---|---------|--------------------------------------------------------------| |---|---------|-----------------------------------------------------------------------------|
| 0 | discard | The output value is discarded. | | 0 | discard | The output value is discarded. |
| 1 | push | The output is pushed to the stack. | | 1 | push | The output is pushed to the stack. |
| 2 | jump | The code pointer is set to the output, thus a jump is taken. | | 2 | jump | The code pointer is set to the output, thus a jump is taken. |
| 3 | jumpr | The code pointer is increased by the output, thus a relative jump is taken. |
### Argument ### Argument
The instruction argument can provide static input which can be used The instruction argument can provide static input which can be used