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as: macro10.txt: use consistent and less archaic terminology, tidy

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Mikael Pettersson 2019-09-06 13:48:30 +02:00
parent 704fdf995e
commit 3cfa254f46
1 changed files with 15 additions and 14 deletions
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29
erlang/apps/as/doc/macro10.txt
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@ -8,7 +8,7 @@ Numbers
=======
Numbers are in octal by default.
The default number radix can be changed using the RADIX pseudo-op.
The default number radix can be changed using the RADIX directive.
A single-digit number is always interpreted as radix 10, that is,
"9" denotes decimal 9 not an error even if RADIX is 8 or 2.
@ -75,14 +75,14 @@ Variable Symbols
----------------
Suffixing a symbol with a number sign ("#") makes it a variable symbol. Such
symbols are allocated by the assembler, either following the literals pool, or
into the code via VAR pseudo-ops.
into the code via VAR directives.
Symbol Visibility
-----------------
Symbols are marked local (INTERNAL) visa the INTERN pseudo-op, or by following
Symbols are marked local (INTERNAL) via the INTERN directive, or by following
the label or direct-assignment definition with an extra colon, i.e., "::" or "=:".
Symbols are marke global (EXTERNAL) via the EXTERN pseudo-op, or by mentioning
Symbols are marked global (EXTERNAL) via the EXTERN directive, or by mentioning
the symbol at least once with a "##" suffix, .e.g. FLAG7## .
Expressions
@ -105,17 +105,19 @@ All operators operate on and generate 36-bit values.
Priority
--------
Unary operations and shifts have highest priority: "+", "-", "^-", "^D", "^O",
Unary operators and shifts have highest priority: "+", "-", "^-", "^D", "^O",
"^B", "B" (binary shift), "_" (underscore shift, "^F", "^L", "E", "K", "M", "G".
The K, M, and G operations are performed first.
The K, M, and G postfix operators are performed first.
Logical binary operations have second-highest priority, and are evaluated left to
Logical binary operators have second-highest priority, and are evaluated left to
right: "!", "^!", "&".
Multiplicative operations have second-lowest priority, and are evaluated left to
Multiplicative operators have second-lowest priority, and are evaluated left to
right: "*", "/".
Additive operations have lowest priority: "*", "-".
Additive operators have lowest priority: "*", "-".
[TODO: what is the priority of ",,"? I suspect lower than additive operators]
Strings
=======
@ -129,7 +131,6 @@ left-justified word, by enclosing it with double quotes, "text".
A string of at most six SIXBIT characters can be assembled into a single
left-justified word, by exclosing it with single quotes, 'text'.
Comments
========
A comment starts with a semi-colon ";" and extends to the end of the line.
@ -141,15 +142,15 @@ Instruction Statements
======================
The general form of an instruction statement is
label: mnemonic accumulator,address ; comment
or label: mnemonic accumulator, ; comment
or label: mnemonic address ; comment
label: mnemonic accumulator,address ; comment
or label: mnemonic accumulator, ; comment
or label: mnemonic address ; comment
An address may be prefixed with "@" to indicate indirect addressing, and/or
suffixed by an index register with parentheses "(indexreg)" to indicate
indexed addressing. E.g.,
ADD 17,@100(3)
ADD 17,@100(3)
Either operand may be a symbol or an expression.