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Minor bugfix. 

asr not ror.
This commit is contained in:
Simon Forman 2019-11-08 15:24:09 -08:00
parent 4c13868e7c
commit 3c796310a5
1 changed files with 17 additions and 14 deletions
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31
thun/compiler.markII.pl
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@ -36,7 +36,7 @@ program([ % Mainloop.
store_word(0, 0, 0),
mov_imm(SP, 0x1000),
mov_imm(EXPR_addr, 0x500),
mov_imm(EXPR_addr, Expression),
mov_imm(TOS, 0),
mov_imm(TERM, 0),
store_word(TOS, SP, 0), % RAM[SP] := 0
@ -52,7 +52,7 @@ program([ % Mainloop.
% At this point EXPR holds the record word of the expression.
ror_imm(TermAddr, EXPR, -15), % put the offset in TermAddr
asr_imm(TermAddr, EXPR, 15), % put the offset in TermAddr
% No need to mask off high bits as the type tag for pairs is 00
add(TermAddr, TermAddr, EXPR_addr),
@ -72,7 +72,7 @@ program([ % Mainloop.
% EXPR_addr now holds the address of the next cell of the expression list.
% if_literal(TERM, PUSH),
ror_imm(TEMP0, TERM, -30), % get just the two tag bits.
asr_imm(TEMP0, TERM, 30), % get just the two tag bits.
sub_imm(TEMP0, TEMP0, 2), % if this is a symbol result is zero.
ne_offset(PUSH),
@ -106,7 +106,7 @@ program([ % Mainloop.
label(Cons), % Let's cons.
ror_imm(TEMP0, TOS, 15), % TEMP0 := TOS >> 15
asr_imm(TEMP0, TOS, 15), % TEMP0 := TOS >> 15
add(TEMP0, TEMP0, SP), % TEMP0 = SP + TOS[30:15]
% TEMP0 = Address of the list to which to append.
@ -123,7 +123,7 @@ program([ % Mainloop.
% the address of the second item on the stack is (TOS) + TEMP1[30:15]
% the address of the third stack cell is (TOS) + TEMP1[15: 0]
ror_imm(TEMP2, TEMP1, 15), % TEMP2 := TEMP1 >> 15
asr_imm(TEMP2, TEMP1, 15), % TEMP2 := TEMP1 >> 15
add(TEMP2, TEMP2, TOS),
% TEMP2 contains the address of the second item on the stack
@ -131,7 +131,7 @@ program([ % Mainloop.
add(TEMP3, TEMP1, TOS),
% TEMP3 = TOS + TEMP1[15:0] the address of the third stack cell
% Build and write the new list cell.
sub_imm(SP, SP, 4),
sub(TEMP2, TEMP2, SP),
sub(TEMP0, TEMP0, SP),
@ -142,15 +142,16 @@ program([ % Mainloop.
% Now reuse TEMP0 and put the next record in TOS.
sub_imm(SP, SP, 4),
sub(TEMP0, TEMP0, SP),
mov_imm_with_shift(TOS, 2), % TOS := 4 << 15
ior(TOS, TOS, TEMP0),
% store_word(TOS, SP, 0),
do_offset(Done)
do_offset(Done), % Rely on mainloop::Done to write TOS to RAM.
]) :- [SP, EXPR_addr, TOS, TERM, EXPR, TermAddr, TEMP0]=[0, 1, 2, 3, 4, 5, 6].
label(Expression),
expr_cell(ConsSym, 0),
label(ConsSym), symbol(Cons)
]) :- [SP, EXPR_addr, TOS, TERM, EXPR, TermAddr, TEMP0, TEMP1, TEMP2, TEMP3]
= [0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ].
@ -195,8 +196,10 @@ asm([]) --> !, [].
asm([ skip(Bits)|Rest]) --> !, skip(Bits), asm(Rest).
asm([(N, Instruction)|Rest]) --> !, asm(N, Instruction), asm(Rest).
asm(_, expr_cell(Func, NextCell)) --> !,
{Data is (Func << 16) \/ NextCell}, asm(_, word(Data)).
asm(Here, expr_cell(Func, NextCell)) --> !,
{Data is ((Func - Here) << 15) \/ NextCell}, asm(Here, word(Data)).
asm(_, symbol(Sym)) --> !, {Data is Sym \/ 0x80000000}, asm(_, word(Data)).
asm(_, word(Word)) --> !, {binary_number(Bits, Word)}, collect(32, Bits).