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Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 29 |
1 files changed, 29 insertions, 0 deletions
@@ -19252,6 +19252,35 @@ is truncated. The return value of .code logtrunc is always a non-negative integer. +.coNP Function @ sign-extend +.synb +.mets (sign-extend < value << bits ) +.syne +.desc +The +.code sign-extend +function first truncates the infinite-bit two's complement representation of +the integer +.meta value +to the specified number of bits, similarly to the +.code logtrunc +function. Then, this truncated value is regarded as a +.meta bits +wide two's complement integer. The value of this integer is +calculated and returned. + +.TP* Examples: + +.cblk + (sign-extend 127 8) -> 127 + (sign-extend 128 8) -> -128 + (sign-extend 129 8) -> -127 + (sign-extend 255 8) -> -1 + (sign-extend 256 8) -> 0 + (sign-extend -1 8) -> -1 + (sign-extend -255 8) -> 0 +.cble + .coNP Function @ ash .synb .mets (ash < value << bits ) |