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changed (and fixed) msb(long) and lsb(long)

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Irmen de Jong
2025-10-13 21:34:03 +02:00
parent 6286035d89
commit 68066acdec
13 changed files with 170 additions and 78 deletions
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9
docs/source/libraries.rst
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@@ -91,16 +91,13 @@ cmp (x,y)
Normally you should just use a comparison expression (``x < y``)
lsb (x)
Get the least significant (lower) byte of the value x. Equivalent to ``x & 255``.
Get the least significant (lower) byte of the value x. Equivalent to ``x & 255`` or even ``x as ubyte``.
lsw (x)
Get the least significant (lower) word of the value x. Equivalent to ``x & 65535``.
Get the least significant (lower) word of the value x. Equivalent to ``x & 65535`` or even ``x as uword``.
msb (x)
Get the most significant (higher) byte of the word value x.
If x is a value greater than a word, it will not actually return the *highest* byte of this value,
but it will only look a the lower word part of this value and return the higher byte from that.
So you're always getting bits 8-16 of the value x: ``msb($1234)`` is $12, whereas ``msb($123456)`` is $34.
Get the most significant (highest) byte of the word or long value x.
msw (x)
Get the most significant (higher) word of the value x. For all word and byte numbers this will always result in 0.

1
docs/source/todo.rst
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@@ -31,6 +31,7 @@ STRUCTS and TYPED POINTERS
Future Things and Ideas
^^^^^^^^^^^^^^^^^^^^^^^
- make $8000000 a valid long integer (-2147483648) this is more involved than you think. To make this work: long |= $80000000
- make memory mapped variables support more constant expressions such as: &uword MyHigh = &mylong1+2
- fix the line, cols in Position, sometimes they count from 0 sometimes from 1, should both always be 1-based (is this the reason some source lines end up missing in the IR file?)
- handle Alias in a general way in LiteralsToAutoVarsAndRecombineIdentifiers instead of replacing it scattered over multiple functions
- After long variable type is completed: make all constants long by default (remove type name altogether), reduce to target type implictly if the actual value fits.