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fixes from c2woody and some of myself

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1348
This commit is contained in:
Peter Veenstra 2003-10-19 19:21:12 +00:00
parent d6e2f1021c
commit 7dab3d53e5
2 changed files with 16 additions and 14 deletions
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15
src/fpu/fpu.cpp
View file

@ -16,6 +16,8 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: fpu.cpp,v 1.14 2003-10-19 19:21:12 qbix79 Exp $ */
#include "dosbox.h"
#if C_FPU
@ -375,7 +377,7 @@ void FPU_ESC1_Normal(Bitu rm) {
void FPU_ESC2_EA(Bitu rm,PhysPt addr) {
/* 32 bits integer operants */
Bit32s blah = mem_readd(addr);
fpu.regs[8].d = static_cast<double>(blah);
fpu.regs[8].d = static_cast<Real64>(blah);
EATREE(rm);
}
@ -453,8 +455,7 @@ void FPU_ESC3_Normal(Bitu rm) {
void FPU_ESC4_EA(Bitu rm,PhysPt addr) {
/* REGULAR TREE WITH 64 BITS REALS ? double ? */
// E_Exit("how to load a double in esc 4 ea");
/* REGULAR TREE WITH 64 BITS REALS: double */
fpu.regs[8].l.lower=mem_readd(addr);
fpu.regs[8].l.upper=mem_readd(addr+4);
EATREE(rm);
@ -478,16 +479,16 @@ void FPU_ESC4_Normal(Bitu rm) {
FPU_FCOM(TOP,ST(sub));
FPU_FPOP();
break;
case 0x04: /* FSUBRP STi,ST*/
case 0x04: /* FSUBR STi,ST*/
FPU_FSUBR(ST(sub),TOP);
break;
case 0x05: /* FSUBP STi,ST*/
case 0x05: /* FSUB STi,ST*/
FPU_FSUB(ST(sub),TOP);
break;
case 0x06: /* FDIVRP STi,ST*/
case 0x06: /* FDIVR STi,ST*/
FPU_FDIVR(ST(sub),TOP);
break;
case 0x07: /* FDIVP STi,ST*/
case 0x07: /* FDIV STi,ST*/
FPU_FDIV(ST(sub),TOP);
break;
default:

15
src/fpu/fpu_instructions.h
View file

@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: fpu_instructions.h,v 1.13 2003-10-07 10:42:01 qbix79 Exp $ */
/* $Id: fpu_instructions.h,v 1.14 2003-10-19 19:21:12 qbix79 Exp $ */
static void FPU_FINIT(void) {
@ -199,10 +199,11 @@ static double FROUND(double in){
static void FPU_FPREM(void){
Real64 valtop = fpu.regs[TOP].d;
Real64 valdiv = fpu.regs[ST(1)].d;
Real64 res = floor(valtop/valdiv);
Bit64s ressaved = static_cast<Bit64s>(res);
res=valtop - res*valdiv;
fpu.regs[TOP].d = res;
Bit64s ressaved = static_cast<Bit64s>( (valtop/valdiv) );
// Some backups
// Real64 res=valtop - ressaved*valdiv;
// res= fmod(valtop,valdiv);
fpu.regs[TOP].d = valtop - ressaved*valdiv;
FPU_SET_C0(static_cast<Bitu>(ressaved&4));
FPU_SET_C3(static_cast<Bitu>(ressaved&2));
FPU_SET_C1(static_cast<Bitu>(ressaved&1));
@ -309,13 +310,13 @@ static void FPU_F2XM1(void){
return;
}
static void FPU_FYL2X(void){
static void FPU_FYL2X(void){
fpu.regs[ST(1)].d*=log(fpu.regs[TOP].d)/log(static_cast<Real64>(2.0));
FPU_FPOP();
return;
}
static void FPU_FSCALE(void){
fpu.regs[TOP].d *=pow(2.0,static_cast<Real64>(static_cast<Bit64s>(FROUND(fpu.regs[ST(1)].d))));
fpu.regs[TOP].d *= pow(2.0,static_cast<Real64>(static_cast<Bit64s>(fpu.regs[ST(1)].d)));
return; //2^x where x is chopped.
}