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+ handle the flags register bits for many Z80 instructions in TCpuAsmOptimizer.RegLoadedWithNewValue

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git-svn-id: trunk@45366 -
This commit is contained in:
nickysn 2020-05-14 22:44:48 +00:00
parent 4559620efa
commit 37b607143a
1 changed files with 49 additions and 3 deletions
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52
compiler/z80/aoptcpu.pas
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@ -259,10 +259,56 @@ Implementation
exit;
end;
p := taicpu(hp);
if SuperRegistersEqual(reg,NR_DEFAULTFLAGS) then
if SuperRegistersEqual(reg,NR_DEFAULTFLAGS) and (reg<>NR_AF) then
begin
{ todo: flags }
internalerror(2020051111);
case p.opcode of
{ todo: 16-bit ADD,ADC,SBC,INC,DEC }
{ todo: IN,INI,INIR,IND,INDR,OUT,OUTI,OTIR,OUTD,OTDR}
A_PUSH,A_POP,A_EX,A_EXX,A_NOP,A_HALT,A_DI,A_EI,A_IM,A_SET,A_RES,A_JP,A_JR,A_DJNZ,A_CALL,A_RET,A_RETI,A_RETN,A_RST:
result:=false;
A_LD:
begin
if p.ops<>2 then
internalerror(2020051112);
{ LD A,I or LD A,R ? }
if (p.oper[0]^.typ=top_reg) and (p.oper[0]^.reg=NR_A) and
(p.oper[1]^.typ=top_reg) and ((p.oper[1]^.reg=NR_I) or (p.oper[1]^.reg=NR_R)) then
result:=(reg=NR_ADDSUBTRACTFLAG) or
(reg=NR_PARITYOVERFLOWFLAG) or
(reg=NR_HALFCARRYFLAG) or
(reg=NR_ZEROFLAG) or
(reg=NR_SIGNFLAG)
else
result:=false;
end;
A_LDI,A_LDIR,A_LDD,A_LDDR:
result:=(reg=NR_ADDSUBTRACTFLAG) or
(reg=NR_PARITYOVERFLOWFLAG) or
(reg=NR_HALFCARRYFLAG);
A_CPI,A_CPIR,A_CPD,A_CPDR,A_INC,A_DEC,A_RLD,A_RRD,A_BIT:
result:=(reg=NR_ADDSUBTRACTFLAG) or
(reg=NR_PARITYOVERFLOWFLAG) or
(reg=NR_HALFCARRYFLAG) or
(reg=NR_ZEROFLAG) or
(reg=NR_SIGNFLAG);
A_ADD,A_ADC,A_SUB,A_SBC,A_AND,A_OR,A_XOR,A_CP,A_NEG,A_RLC,A_RL,A_RRC,A_RR,A_SLA,A_SRA,A_SRL:
result:=true;
A_DAA:
result:=(reg=NR_PARITYOVERFLOWFLAG) or
(reg=NR_HALFCARRYFLAG) or
(reg=NR_ZEROFLAG) or
(reg=NR_SIGNFLAG) or
(reg=NR_CARRYFLAG);
A_CPL:
result:=(reg=NR_HALFCARRYFLAG) or
(reg=NR_ADDSUBTRACTFLAG);
A_CCF,A_SCF,A_RLCA,A_RLA,A_RRCA,A_RRA:
result:=(reg=NR_HALFCARRYFLAG) or
(reg=NR_ADDSUBTRACTFLAG) or
(reg=NR_CARRYFLAG);
else
internalerror(2020051111);
end;
end
else
case p.opcode of