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ceriel 1990-02-09 16:28:26 +00:00
parent dedf1d945c
commit 8d7a5dba0a
1 changed files with 22 additions and 14 deletions
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@ -301,16 +301,16 @@ Here is a list of reserved words; all of these are unavailable as identifiers.
.TS
box;
l l l l l.
ADDR STACK from reg_any test
COERCIONS STACKINGRULES gen reg_float to
INSTRUCTIONS TESTS highw reg_loop ufit
INT TIMEFACTOR inreg reg_pointer uses
MOVES TOKENS kills regvar with
PATTERNS call leaving return yields
PROPERTIES cost loww reusing
REGISTERS defined move rom
SETS exact pat samesign
SIZEFACTOR example proc sfit
ADDR STACK from proc sfit
COERCIONS STACKINGRULES gen reg_any test
INSTRUCTIONS TESTS highw reg_float to
INT TIMEFACTOR inreg reg_loop ufit
MOVES TOKENS is_rom reg_pointer uses
PATTERNS call kills regvar with
PROPERTIES cost leaving return yields
REGISTERS defined loww reusing
SETS exact move rom
SIZEFACTOR example pat samesign
.TE
C style comments are accepted.
.DS
@ -883,6 +883,14 @@ number
.I a
in the EM-pattern.
Undefined if that descriptor does not exist.
.IP is_rom($a)
Integer expression indicating whether EM instruction number
.I a
in the EM-pattern refers to ROM. This may be useful for generating
position-independent code with the ROM in read-only memory.
.I Is_rom
enables one to see the difference between ROM references and other data
references.
.IP loww($a)
Returns the lower half of the argument of EM instruction number
.I a .
@ -1656,10 +1664,10 @@ The current version of
.I cgg
does not check correctness of the example, so be careful.
.PP
A procedure is called with one or two string-parameters,
A procedure is called with string-parameters,
that are assembler opcodes.
They can be accessed by appending the strings `[1]' or `[2]'
to a table opcode.
They can be accessed by appending the string `[<number>]'
to a table opcode, where <number> is the parameter number.
The string `*' can be used as an equivalent for `[1]'.
Just in case this is not clear, here is an example for
a procedure to increment/decrement a register.
@ -1676,7 +1684,7 @@ The procedure is called with parameter "inc" or "dec".
The procedure call is given instead of the code-part of the
code rule and looks like this
.DS
call <identifier> '(' string [ ',' string ] ')'
call <identifier> '(' <comma-separated list of strings> ')'
.DE
which leads to the following large example:
.DS