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* made pic-safe (by simply not accessing global variables from

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assembler code anymore, as I don't see how to easily support
    PIC access to global variables for Darwin/i386)

git-svn-id: trunk@8663 -
This commit is contained in:
Jonas Maebe 2007-09-27 15:08:09 +00:00
parent e81d4b737f
commit f51bac256d
2 changed files with 29 additions and 27 deletions
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16
rtl/i386/i386.inc
View File

@ -1216,16 +1216,24 @@ const
{$define FPC_SYSTEM_HAS_SYSRESETFPU} {$define FPC_SYSTEM_HAS_SYSRESETFPU}
Procedure SysResetFPU;{$ifdef SYSTEMINLINE}inline;{$endif} Procedure SysResetFPU;{$ifdef SYSTEMINLINE}inline;{$endif}
var
{ these locals are so we don't have to hack pic code in the assembler }
localmxcsr: dword;
localfpucw: word;
begin begin
localfpucw:=Default8087CW;
asm asm
fninit fninit
fldcw Default8087CW fldcw localfpucw
fwait fwait
end; end;
if has_sse_support then if has_sse_support then
asm begin
{ setup sse exceptions } localmxcsr:=mxcsr;
ldmxcsr mxcsr asm
{ setup sse exceptions }
ldmxcsr localmxcsr
end;
end; end;
softfloat_exception_flags:=0; softfloat_exception_flags:=0;
softfloat_exception_mask:=float_flag_underflow or float_flag_inexact or float_flag_denormal; softfloat_exception_mask:=float_flag_underflow or float_flag_inexact or float_flag_denormal;

40
rtl/i386/math.inc
View File

@ -17,14 +17,15 @@
FPU Control word FPU Control word
****************************************************************************} ****************************************************************************}
procedure Set8087CW(cw:word);assembler; procedure Set8087CW(cw:word);
asm begin
{$ifndef REGCALL} { pic-safe ; cw will not be a regvar because it's accessed from }
movw cw,%ax { assembler }
{$endif} default8087cw:=cw;
movw %ax,default8087cw asm
fnclex fnclex
fldcw default8087cw fldcw cw
end;
end; end;
@ -120,20 +121,22 @@
{$define FPC_SYSTEM_HAS_EXP} {$define FPC_SYSTEM_HAS_EXP}
function fpc_exp_real(d : ValReal) : ValReal;assembler;compilerproc; function fpc_exp_real(d : ValReal) : ValReal;assembler;compilerproc;
var
cw1,cw2: word;
asm asm
// comes from DJ GPP // comes from DJ GPP
fldt d fldt d
fldl2e fldl2e
fmulp %st,%st(1) fmulp %st,%st(1)
fstcw .LCW1 fstcw CW1
fstcw .LCW2 fstcw CW2
fwait fwait
andw $0xf3ff,.LCW2 andw $0xf3ff,CW2
orw $0x0400,.LCW2 orw $0x0400,CW2
fldcw .LCW2 fldcw CW2
fld %st(0) fld %st(0)
frndint frndint
fldcw .LCW1 fldcw CW1
fxch %st(1) fxch %st(1)
fsub %st(1),%st fsub %st(1),%st
f2xm1 f2xm1
@ -142,15 +145,6 @@
fscale fscale
fstp %st(1) fstp %st(1)
fclex fclex
jmp .LCW3
// store some help data in the data segment
.data
.LCW1:
.word 0
.LCW2:
.word 0
.text
.LCW3:
end; end;