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Lars-Peter Clausen
5311c0cd38
Currently the vvp target emits unary real minus as `0.0 - value`. This is not the same operation for all real values. It loses the negative zero result for `-(+0.0)` and does not reliably flip the sign bit for NaN values whose bits are visible through `$realtobits`. Add `%neg/wr` and use it for unary real minus. This performs a direct negation of the real stack value, so zero, NaN and infinity all use the same operation as unary minus instead of a binary subtraction from zero. Signed-off-by: Lars-Peter Clausen <[email protected]>