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* macos stack frame size computing updated

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+ macos epilogue: control register now restored
  * macos prologue and epilogue: fp reg now saved and restored
This commit is contained in:
olle 2002-10-19 23:51:48 +00:00
parent 1dfea79867
commit 4d3ed1a22c
1 changed files with 77 additions and 2 deletions
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79
compiler/powerpc/cgcpu.pas
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@ -1110,6 +1110,42 @@ const
end;
end;
const
macosLinkageAreaSize = 24;
registerSaveAreaMaxSize = 19*4 + 18*8;
procedure save_fp_regs(list : taasmoutput);
var regcounter: TRegister;
href : treference;
offset: integer;
begin
offset:= 0;
for regcounter := R_F14 to R_F31 do
begin
offset:= offset - 8;
reference_reset_base(href, STACK_POINTER_REG, offset);
list.concat(taicpu.op_reg_ref(A_STFD, regcounter, href));
end;
end;
procedure restore_fp_regs(list : taasmoutput);
var regcounter: TRegister;
href : treference;
offset: integer;
begin
offset:= 0;
for regcounter := R_F14 to R_F31 do
begin
offset:= offset - 8;
reference_reset_base(href, STACK_POINTER_REG, offset);
list.concat(taicpu.op_reg_ref(A_LFD, regcounter, href));
end;
end;
procedure tcgppc.g_stackframe_entry_mac(list : taasmoutput;localsize : longint);
{ generated the entry code of a procedure/function. Note: localsize is the }
{ sum of the size necessary for local variables and the maximum possible }
@ -1129,28 +1165,36 @@ const
{ allocate registers containing reg parameters }
for regcounter := R_3 to R_10 do
a_reg_alloc(list,regcounter);
{ save return address... }
list.concat(taicpu.op_reg_reg(A_MFSPR,R_0,R_LR));
{ ... in caller's frame }
reference_reset_base(href,STACK_POINTER_REG,8);
list.concat(taicpu.op_reg_ref(A_STW,R_0,href));
a_reg_dealloc(list,R_0);
{ save floating-point registers }
{ !!! has to be optimized: only save registers that are used }
a_call_name(list,'_savef14');
save_fp_regs(list);
(* a_call_name(list,'_savef14'); *)
{ save gprs in gpr save area }
{ !!! has to be optimized: only save registers that are used }
reference_reset_base(href,STACK_POINTER_REG,-220);
list.concat(taicpu.op_reg_ref(A_STMW,R_13,href));
{ save the CR if necessary ( !!! always done currently ) }
a_reg_alloc(list,R_0);
list.concat(taicpu.op_reg_reg(A_MFSPR,R_0,R_CR));
reference_reset_base(href,stack_pointer_reg,LA_CR);
list.concat(taicpu.op_reg_ref(A_STW,R_0,href));
a_reg_dealloc(list,R_0);
{ save pointer to incoming arguments }
list.concat(taicpu.op_reg_reg_const(A_ORI,R_31,STACK_POINTER_REG,0));
(*
a_reg_alloc(list,R_12);
{ 0 or 8 based on SP alignment }
list.concat(taicpu.op_reg_reg_const_const_const(A_RLWINM,
R_12,STACK_POINTER_REG,0,28,28));
@ -1159,7 +1203,16 @@ const
-localsize));
{ establish new alignment }
list.concat(taicpu.op_reg_reg_reg(A_STWUX,STACK_POINTER_REG,STACK_POINTER_REG,R_12));
a_reg_dealloc(list,R_12);
*)
{ allocate stack frame }
localsize:= align(localsize + macosLinkageAreaSize + registerSaveAreaMaxSize, 16);
reference_reset_base(href,R_1,-localsize);
a_load_store(list,A_STWU,R_1,href);
{ now comes the AltiVec context save, not yet implemented !!! }
end;
@ -1176,14 +1229,31 @@ const
{ restore SP }
list.concat(taicpu.op_reg_reg_const(A_ORI,STACK_POINTER_REG,R_31,0));
{ restore the CR if necessary ( !!! always done currently ) }
a_reg_alloc(list,R_0);
list.concat(taicpu.op_reg_reg(A_MTSPR,R_0,R_CR));
reference_reset_base(href,stack_pointer_reg,LA_CR);
list.concat(taicpu.op_reg_ref(A_LWZ,R_0,href));
a_reg_dealloc(list,R_0);
{ restore gprs }
reference_reset_base(href,STACK_POINTER_REG,-220);
list.concat(taicpu.op_reg_ref(A_LMW,R_13,href));
{ restore return address ... }
reference_reset_base(href,STACK_POINTER_REG,8);
list.concat(taicpu.op_reg_ref(A_LWZ,R_0,href));
(*
{ ... and return from _restf14 }
list.concat(taicpu.op_sym_ofs(A_B,objectlibrary.newasmsymbol('_restf14'),0));
*)
{ restore fp registers }
restore_fp_regs(list);
{ return to caller }
list.concat(taicpu.op_reg_reg(A_MTSPR,R_0,R_LR));
list.concat(taicpu.op_none(A_BLR));
end;
@ -1700,7 +1770,12 @@ begin
end.
{
$Log$
Revision 1.61 2002-10-19 12:50:36 olle
Revision 1.62 2002-10-19 23:51:48 olle
* macos stack frame size computing updated
+ macos epilogue: control register now restored
* macos prologue and epilogue: fp reg now saved and restored
Revision 1.61 2002/10/19 12:50:36 olle
* reorganized prologue and epilogue routines
Revision 1.60 2002/10/02 21:49:51 florian