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Implementing LSHIFT and RSHIFT per request

This commit is contained in:
Jeremiah Orians 2017-06-24 08:49:08 -04:00
parent 37b061defc
commit a51c243088
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GPG Key ID: 7457821534D2ACCD
4 changed files with 32 additions and 3 deletions
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1
CHANGELOG.org
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@ -29,6 +29,7 @@ Added region-comment "(" (note that it doesn't nest) to stage3 FORTH
Added hex dump printer DUMP and support words to stage3 FORTH
Added DOES> and supporting words, and used it to make VARIABLE, CONSTANT, and DEFER in stage3 FORTH
Added TUCK, MIN, SPACES, :NONAME, FILL, and <> to stage3 FORTH
Added LSHIFT and RSHIFT to stage2 FORTH
** Changed
Minor refactor of stage3 FORTH by reepa

2
bootstrapping Steps.org
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@ -174,7 +174,7 @@ Then we use our M0 Line macro assembler to convert our assembly into hex2 format
Then we need to assemble that hex into our desired program:
./bin/vm --rom roms/stage1_assembler-2 --tape_01 temp2 --tape_02 roms/forth --memory 48K
roms/forth should with the sha256sum of 3b54a0248b79b18d7afdbaae8c61e3afd8d3519e394e4f87ae8fd2bef59cde43
roms/forth should with the sha256sum of 53619f77736729edc06b79d27d835ada6a4235954c467dd0514e312ec4acf3dc
Our forth will first attempt to evaluate any code in tape_01 and then evaluate any code that the user types in
(Otherwise there is no way for a forth fan to have a chance against the lisp in terms of being able to bootstrap something cool)

30
stage2/forth.s
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@ -379,11 +379,39 @@
PUSHR R0 R14 ; Store the result
JSR_COROUTINE R11 ; NEXT
:LSHIFT_Text
"LSHIFT"
:LSHIFT_Entry
&MOD_Entry ; Pointer to %
&LSHIFT_Text ; Pointer to Name
NOP ; Flags
&LSHIFT_Code ; Where assembly is Stored
:LSHIFT_Code
POPR R0 R14 ; Get top of stack
POPR R1 R14 ; Get second item on Stack
SAL R0 R1 R0 ; Left Shift
PUSHR R0 R14 ; Store the result
JSR_COROUTINE R11 ; NEXT
:RSHIFT_Text
"RSHIFT"
:RSHIFT_Entry
&LSHIFT_Entry ; Pointer to LSHIFT
&RSHIFT_Text ; Pointer to Name
NOP ; Flags
&RSHIFT_Code ; Where assembly is Stored
:RSHIFT_Code
POPR R0 R14 ; Get top of stack
POPR R1 R14 ; Get second item on Stack
SAR R0 R1 R0 ; Left Shift
PUSHR R0 R14 ; Store the result
JSR_COROUTINE R11 ; NEXT
;; =
:Equal_Text
"="
:Equal_Entry
&MOD_Entry ; Pointer to %
&RSHIFT_Entry ; Pointer to RSHIFT
&Equal_Text ; Pointer to Name
NOP ; Flags
&Equal_Code ; Where assembly is Stored

2
test/SHA256SUMS
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@ -1,6 +1,6 @@
8f465d3ec1cba00a7d024a1964e74bb6d241f86a73c77d95d8ceb10d09c8f7b9 roms/CAT
59f0502748af32e3096e026a95e77216179cccfe803a05803317414643e2fcec roms/DEHEX
3b54a0248b79b18d7afdbaae8c61e3afd8d3519e394e4f87ae8fd2bef59cde43 roms/forth
53619f77736729edc06b79d27d835ada6a4235954c467dd0514e312ec4acf3dc roms/forth
4c146297da8c672955698a82207295b28feb389c9856a2c6ea6a60ce7e84260a roms/lisp
2b9727381aec15a504c0898189fbc2344209d8e04451e3fa5d743e08e38f64cf roms/M0
24a4d74eb2eb7a82e68335643855658b27b5a6c3b13db473539f3e08d6f26ceb roms/SET