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More progress in assembler.

This commit is contained in:
Andrew Alderwick 2021-04-18 12:48:49 +01:00
parent bcf95cbadb
commit 5ccd4ae8b9
1 changed files with 35 additions and 15 deletions
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50
projects/software/assembler.usm
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@ -1,5 +1,5 @@
;tree { search-key 2 max-key-len 1 }
;assembler { pass 1 state 1 token 2 scope-len 1 scope 80 heap 2 addr 2 subtree 2 vartmp 2 field 2 }
;assembler { pass 1 state 1 token 2 scope-len 1 scope 80 heap 2 addr 2 subtree 2 field_size 2 var_size 2 field 2 }
%HCF { #0000 DIV }
%SHORT_FLAG { #20 }
@ -22,19 +22,34 @@
@RESET
,assembler-heap-start =assembler.heap
#0070 =assembler.addr
,$read-filename =File.name
#1000 =File.length
#f000 =File.load
#f000 #1000 ^assemble-chunk JSR
,$read-filename ^assemble-file JSR
HCF
$read-filename [ etc/assembler-test.usm 00 ]
HCF
@assemble-chunk ( ptr* len* -- 00 if EOF found in chunk
OR assembled-up-to-ptr* 01 if reached end of chunk )
$read-filename [ projects/software/noodle.usm 00 ]
@assemble-file ( filename-ptr* -- )
#0000
$loop
OVR2 =File.name
DUP2 =File.offset
#0600 =File.length
#f000 DUP2 DUP2 =File.load
~File.success DUP2 #0000 EQU2 ^$end JNZ
^assemble-chunk JSR
SUB2 SUB2
^$loop JMP
$end
POP2 POP2 POP2 POP2 POP2
JMP2r
@assemble-chunk ( ptr* len* -- assembled-up-to-ptr* )
( FIXME we still return on seeing 00 in source code,
while assemble-file is now binary safe )
OVR2 ADD2 STH2
#0001 SUB2
@ -49,14 +64,14 @@
DUP2 OVR2r STH2r LTS2 ^$valid JNZ
SWP2r POP2r POP2
STH2r #0001 ADD2
#01 JMP2r
JMP2r
$valid
DUP2 PEK2 #00 OVR2 POK2
STH2r #0001 ADD2 ^assemble-token JSR
^$per-token JNZ
POP2 POP2r #00 JMP2r
POP2r JMP2r
@assemble-macro ( macro-ptr* -- )
DUP2 ,strlen JSR2 DUP2 #0000 EQU2 ^$end JNZ
@ -507,7 +522,7 @@
JMP2r
@normal-] [ 0000 ] [ 0000 ] [ 5d ]
( this is spurious, but ignore it anyway )
~assembler.state #df AND =assembler.state
JMP2r
@data-] .normal-( [ 0000 ] [ 5d ]
@ -638,6 +653,7 @@
@normal-; [ 0000 ] [ 0000 ] [ 3b ]
#80 ~assembler.token ,label-tree ,add-label JSR2
~assembler.heap #0000 OVR2 STR2
DUP2 #0003 SUB2 =assembler.var_size
DUP2 =assembler.subtree
#0002 ADD2 =assembler.heap
@ -657,7 +673,7 @@
@variable-name
#00 ~assembler.token ~assembler.subtree ,add-label JSR2
~assembler.heap #0003 SUB2 =assembler.vartmp
~assembler.heap #0003 SUB2 =assembler.field_size
~assembler.state #f7 AND =assembler.state
JMP2r
@ -668,8 +684,11 @@
JMP2r
$valid
$no-var-size
DUP #02 GTH ^$end JNZ
DUP ~assembler.vartmp POK2
DUP ~assembler.field_size POK2
~assembler.var_size #0000 EQU2 ^$end JNZ
DUP #80 EOR ~assembler.var_size POK2
^$end JMP
$loop
@ -679,6 +698,7 @@
DUP ^$loop JNZ
POP
~assembler.state #0c ORA =assembler.state
#0000 =assembler.var_size
JMP2r
(