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[Ceres]: Improve documentation of new features

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Hans Svensson
2024-01-26 10:39:06 +01:00
parent fbaab570f2
commit aa532046d3
2 changed files with 14 additions and 5 deletions
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docs/sophia_features.md
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@@ -640,10 +640,16 @@ Sophia arbitrary-sized integers (FATE) also supports the following bitwise opera
- arithmetic bitshift left (`x << n`)
- arithmetic bitshift right (`x >> n`)
Note: Arithmetic bitshift treats the number as a signed integer (in 2s
complement), and "retains" the topmost bit. I.e. shifting in zeros if the
topmost bit was 0, and ones if it was one.
## Bit fields
Sophia integers do not support bit arithmetic. Instead there is a separate
type `bits`. See the standard library [documentation](sophia_stdlib.md#bits).
Originally Sophia integers did not support bit arithmetic. Instead we used a
separate type `bits` (see the standard library
[documentation](sophia_stdlib.md#bits)) - it is still provided as an
alternative to bit arithmetic.
A bit field can be of arbitrary size (but it is still represented by the
corresponding integer, so setting very high bits can be expensive).