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+ added a not-yet-complete implementation of TZ80AddNode.second_cmp. Only 8-bit unsigned comparison

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works for now, and only for the <,= and <> operators

git-svn-id: branches/z80@44575 -
This commit is contained in:
nickysn 2020-04-04 17:15:31 +00:00
parent 3ed692a157
commit f52f9dc56b
1 changed files with 27 additions and 6 deletions
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33
compiler/z80/nz80add.pas
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@ -26,7 +26,7 @@ unit nz80add;
interface
uses
node,ncgadd,cpubase;
node,ncgadd, symtype,cpubase;
type
TZ80AddNode = class(tcgaddnode)
@ -188,15 +188,36 @@ interface
unsigned : boolean;
tmpreg1,tmpreg2 : tregister;
i : longint;
opdef: tdef;
opsize: TCgSize;
begin
pass_left_right;
// force_reg_left_right(true,true);
unsigned:=not(is_signed(left.resultdef)) or
not(is_signed(right.resultdef));
opdef:=left.resultdef;
opsize:=def_cgsize(opdef);
cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_8,GetByteLoc(left.location,0),NR_A);
cg.a_op_loc_reg(current_asmdata.CurrAsmList,OP_SUB,OS_8,GetByteLoc(right.location,0),NR_A);
pass_left_right;
if opsize=OS_8 then
begin
force_reg_left_right(true,true);
cg.getcpuregister(current_asmdata.CurrAsmList,NR_A);
cg.a_load_loc_reg(current_asmdata.CurrAsmList,def_cgsize(left.resultdef),left.location,NR_A);
current_asmdata.CurrAsmList.Concat(taicpu.op_reg_reg(A_CP,NR_A,right.location.register));
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_A);
location_reset(location,LOC_FLAGS,OS_NO);
location.resflags:=getresflags(unsigned);
writeln(location.resflags);
end
else
internalerror(2020040401);
// force_reg_left_right(true,true);
//cg.a_load_loc_reg(current_asmdata.CurrAsmList,OS_8,GetByteLoc(left.location,0),NR_A);
//cg.a_op_loc_reg(current_asmdata.CurrAsmList,OP_SUB,OS_8,GetByteLoc(right.location,0),NR_A);
//tmpreg1:=left.location.register;
//tmpreg2:=right.location.register;