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Update documentation

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Karol Stasiak 2018-03-10 22:05:10 +01:00
parent 89b23ee425
commit 465ba2f02f
2 changed files with 21 additions and 8 deletions
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6
CHANGELOG.md
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@ -12,6 +12,8 @@
* Enabled calling macros with index expression parameters.
* Enabled calling macros from assembly.
* Added optimizer hints: `inline`, `noinline`, `register`.
* Added command line flags `--size`, `--fast`, `--blast-processing`.
@ -19,7 +21,7 @@
* Removed command line flag `--detailed-flow`.
Detailed flow analysis was slow, broken, hard to maintain, and didn't even help that much.
* Added `*'=` and `nonet` operators. (Also, the `<<<<` operator, but it will be phased out before 0.2 and replaced by `nonet(a << b)`.)
* Added `*'=` and `nonet` operators.
* Added support for zeropage pseudoregisters, allowing for some operators work with more types of operands.
@ -31,6 +33,8 @@ Detailed flow analysis was slow, broken, hard to maintain, and didn't even help
* Added octal and quaternary literals.
* Fixed several allocation bugs.
* Fixed several optimization bugs.
* Fixed several C64 library bugs.

23
doc/lang/operators.md
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@ -16,7 +16,7 @@ Millfork has different operator precedence compared to most other languages. Fro
* `*`, `*'`
* `+`, `+'`, `-`, `-'`, `|`, `&`, `^`, `>>`, `>>'`, `<<`, `<<'`, `>>>>`, `<<<<`
* `+`, `+'`, `-`, `-'`, `|`, `&`, `^`, `>>`, `>>'`, `<<`, `<<'`, `>>>>`
* `:`
@ -42,7 +42,7 @@ In the descriptions below, arguments to the operators are explained as follows:
* `word` means any two-byte type, or a byte expanded to a word
* `long` means any type longer than two bytes, or a shorted type expanded to such length to match the other argument
* `long` means any type longer than two bytes, or a shorter type expanded to such length to match the other argument
* `constant` means a compile-time constant
@ -92,11 +92,8 @@ There are no division, remainder or modulo operators.
`constant word << constant byte`
`constant long << constant byte`
* `>>>>`: shifting a 9-bit value and returning a byte; `a >>>> b` is equivalent to `(a & $1FF) >> b`, but the latter doesn't compile yet
`word >>>> constant byte`
* `<<<<`: shifting a byte and returning a 9-bit value; `a <<<< b` is equivalent to `(a << b) & 0x1ff` if there was no overflow, but the latter doesn't compile yet
`byte <<<< constant byte`
* `>>>>`: shifting a 9-bit value and returning a byte; `a >>>> b` is equivalent to `(a & $1FF) >> b`
`word >>>> constant byte`
## Decimal arithmetic operators
@ -182,4 +179,16 @@ An expression of form `a[i]`, where `i` is an expression of type `byte`, is:
Those expressions are of type `byte`. If `a` is any other kind of expression, `a[i]` is invalid.
## Built-in functions
* `not`: negation of a boolean expression
`not(bool)`
* `nonet`: expansion of an 8-bit operation to a 9-bit operation
`nonet(byte + byte)`
`nonet(byte +' byte)`
`nonet(byte << constant byte)`
`nonet(byte <<' constant byte)`
Other kinds of expressions than the above (even `nonet(byte + byte + byte)`) will not work as expected.