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Manual.md: describe register negation

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fincs 2014-12-12 22:24:58 +01:00
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@ -55,6 +55,8 @@ For convenience, registers may be addressed using an offset from a known registe
Some source operands of instructions (called SRC1) support relative addressing. This means that it is possible to use one of the three built-in indexing registers (`a0`, `a1` and `a2` aka `lcnt`) to address a register, e.g. `someArray[lcnt]`. Adding an offset is also supported, e.g. `someArray[lcnt+2]`. This is useful in FOR loops.
Normal floating-point vector registers may also be negated by prepending a minus sign before it, e.g. `-r2` or `-someArray[lcnt+2]`.
## Supported Directives
### .proc