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@@ -503,104 +503,144 @@ unit cpupara;
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varalign : longint;
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pushaddr : boolean;
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paraalign : shortint;
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+ pass : byte;
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begin
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+ if paras.count=0 then
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+ exit;
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paraalign:=get_para_align(p.proccalloption);
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- { Register parameters are assigned from left to right }
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+
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+ { clean up here so we can later detect properly if a parameter has been
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+ assigned or not
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+ }
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for i:=0 to paras.count-1 do
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+ tparavarsym(paras[i]).paraloc[side].reset;
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+ { Register parameters are assigned from left to right,
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+ stack parameters from right to left so assign first the
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+ register parameters in a first pass, in the second
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+ pass all unhandled parameters are done }
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+ for pass:=1 to 2 do
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begin
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- hp:=tparavarsym(paras[i]);
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- pushaddr:=push_addr_param(hp.varspez,hp.vardef,p.proccalloption);
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- if pushaddr then
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- begin
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- paralen:=sizeof(aint);
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- paracgsize:=OS_ADDR;
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- end
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- else
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- begin
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- paralen:=push_size(hp.varspez,hp.vardef,p.proccalloption);
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- paracgsize:=def_cgsize(hp.vardef);
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- end;
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- hp.paraloc[side].reset;
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- hp.paraloc[side].size:=paracgsize;
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- hp.paraloc[side].intsize:=paralen;
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- hp.paraloc[side].Alignment:=paraalign;
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- {
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- EAX
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- EDX
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- ECX
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- Stack
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- Stack
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-
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- 64bit values,floats,arrays and records are always
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- on the stack.
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- }
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- if (parareg<=high(parasupregs)) and
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- (paralen<=sizeof(aint)) and
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- (
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- not(hp.vardef.typ in [floatdef,recorddef,arraydef]) or
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- pushaddr
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- ) then
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- begin
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- paraloc:=hp.paraloc[side].add_location;
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- paraloc^.size:=paracgsize;
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- paraloc^.loc:=LOC_REGISTER;
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- paraloc^.register:=newreg(R_INTREGISTER,parasupregs[parareg],cgsize2subreg(paracgsize));
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- inc(parareg);
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- end
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+ if pass=1 then
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+ i:=0
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else
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+ i:=paras.count-1;
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+ while true do
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begin
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- { Copy to stack? }
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- if (use_fixed_stack) or
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- (paracgsize=OS_NO) then
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+ hp:=tparavarsym(paras[i]);
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+ if not(assigned(hp.paraloc[side].location)) then
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begin
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- paraloc:=hp.paraloc[side].add_location;
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- paraloc^.loc:=LOC_REFERENCE;
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- paraloc^.size:=paracgsize;
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- if side=callerside then
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- paraloc^.reference.index:=NR_STACK_POINTER_REG
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+
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+ pushaddr:=push_addr_param(hp.varspez,hp.vardef,p.proccalloption);
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+ if pushaddr then
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+ begin
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+ paralen:=sizeof(aint);
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+ paracgsize:=OS_ADDR;
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+ end
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else
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- paraloc^.reference.index:=NR_FRAME_POINTER_REG;
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- varalign:=used_align(size_2_align(paralen),paraalign,paraalign);
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- paraloc^.reference.offset:=parasize;
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- if side=calleeside then
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- inc(paraloc^.reference.offset,target_info.first_parm_offset);
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- parasize:=align(parasize+paralen,varalign);
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- end
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- else
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- begin
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- if paralen=0 then
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- internalerror(200501163);
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- while (paralen>0) do
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begin
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- paraloc:=hp.paraloc[side].add_location;
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- paraloc^.loc:=LOC_REFERENCE;
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- { Extended and double need a single location }
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- if (paracgsize in [OS_F64,OS_F32]) then
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+ paralen:=push_size(hp.varspez,hp.vardef,p.proccalloption);
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+ paracgsize:=def_cgsize(hp.vardef);
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+ end;
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+ hp.paraloc[side].size:=paracgsize;
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+ hp.paraloc[side].intsize:=paralen;
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+ hp.paraloc[side].Alignment:=paraalign;
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+ {
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+ EAX
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+ EDX
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+ ECX
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+ Stack
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+ Stack
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+
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+ 64bit values,floats,arrays and records are always
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+ on the stack.
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+ }
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+ if (parareg<=high(parasupregs)) and
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+ (paralen<=sizeof(aint)) and
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+ (
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+ not(hp.vardef.typ in [floatdef,recorddef,arraydef]) or
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+ pushaddr
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+ ) then
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+ begin
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+ if pass=1 then
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begin
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+ paraloc:=hp.paraloc[side].add_location;
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paraloc^.size:=paracgsize;
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- l:=paralen;
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- end
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- else
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- begin
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- { We can allocate at maximum 32 bits per location }
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- if paralen>sizeof(aint) then
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- l:=sizeof(aint)
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- else
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- l:=paralen;
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- paraloc^.size:=int_cgsize(l);
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+ paraloc^.loc:=LOC_REGISTER;
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+ paraloc^.register:=newreg(R_INTREGISTER,parasupregs[parareg],cgsize2subreg(paracgsize));
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+ inc(parareg);
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end;
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- if side=callerside then
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- paraloc^.reference.index:=NR_STACK_POINTER_REG
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- else
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- paraloc^.reference.index:=NR_FRAME_POINTER_REG;
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- varalign:=used_align(size_2_align(l),paraalign,paraalign);
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- paraloc^.reference.offset:=parasize;
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- if side=calleeside then
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- inc(paraloc^.reference.offset,target_info.first_parm_offset);
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- parasize:=align(parasize+l,varalign);
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- dec(paralen,l);
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- end;
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+ end
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+ else
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+ if pass=2 then
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+ begin
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+ { Copy to stack? }
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+ if (use_fixed_stack) or
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+ (paracgsize=OS_NO) then
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+ begin
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+ paraloc:=hp.paraloc[side].add_location;
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+ paraloc^.loc:=LOC_REFERENCE;
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+ paraloc^.size:=paracgsize;
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+ if side=callerside then
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+ paraloc^.reference.index:=NR_STACK_POINTER_REG
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+ else
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+ paraloc^.reference.index:=NR_FRAME_POINTER_REG;
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+ varalign:=used_align(size_2_align(paralen),paraalign,paraalign);
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+ paraloc^.reference.offset:=parasize;
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+ if side=calleeside then
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+ inc(paraloc^.reference.offset,target_info.first_parm_offset);
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+ parasize:=align(parasize+paralen,varalign);
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+ end
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+ else
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+ begin
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+ if paralen=0 then
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+ internalerror(200501163);
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+ while (paralen>0) do
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+ begin
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+ paraloc:=hp.paraloc[side].add_location;
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+ paraloc^.loc:=LOC_REFERENCE;
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+ { Extended and double need a single location }
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+ if (paracgsize in [OS_F64,OS_F32]) then
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+ begin
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+ paraloc^.size:=paracgsize;
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+ l:=paralen;
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+ end
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+ else
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+ begin
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+ { We can allocate at maximum 32 bits per location }
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+ if paralen>sizeof(aint) then
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+ l:=sizeof(aint)
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+ else
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+ l:=paralen;
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+ paraloc^.size:=int_cgsize(l);
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+ end;
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+ if side=callerside then
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+ paraloc^.reference.index:=NR_STACK_POINTER_REG
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+ else
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+ paraloc^.reference.index:=NR_FRAME_POINTER_REG;
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+ varalign:=used_align(size_2_align(l),paraalign,paraalign);
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+ paraloc^.reference.offset:=parasize;
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+ if side=calleeside then
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+ inc(paraloc^.reference.offset,target_info.first_parm_offset);
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+ parasize:=align(parasize+l,varalign);
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+ dec(paralen,l);
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+ end;
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+ end;
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+ end;
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end;
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+ case pass of
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+ 1:
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+ begin
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+ if i=paras.count-1 then
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+ break;
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+ inc(i);
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+ end;
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+ 2:
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+ begin
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+ if i=0 then
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+ break;
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+ dec(i);
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+ end;
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+ end;
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end;
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end;
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end;
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florian