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Initial softfloat port from Bochs to 86box, currently selectable only on QT.

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This commit is contained in:
TC1995
2023-04-29 18:56:57 +02:00
parent 071c05e65f
commit 7a53e1de45
44 changed files with 16934 additions and 115 deletions
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82
src/cpu/808x.c
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@@ -3178,33 +3178,63 @@ execx86(int cycs)
tempw = cpu_state.pc;
if (!hasfpu)
geteaw();
else
switch (opcode) {
case 0xD8:
ops_fpu_8087_d8[(rmdat >> 3) & 0x1f]((uint32_t) rmdat);
break;
case 0xD9:
ops_fpu_8087_d9[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDA:
ops_fpu_8087_da[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDB:
ops_fpu_8087_db[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDC:
ops_fpu_8087_dc[(rmdat >> 3) & 0x1f]((uint32_t) rmdat);
break;
case 0xDD:
ops_fpu_8087_dd[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDE:
ops_fpu_8087_de[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDF:
ops_fpu_8087_df[rmdat & 0xff]((uint32_t) rmdat);
break;
else {
if (fpu_softfloat) {
switch (opcode) {
case 0xD8:
ops_sf_fpu_8087_d8[(rmdat >> 3) & 0x1f]((uint32_t) rmdat);
break;
case 0xD9:
ops_sf_fpu_8087_d9[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDA:
ops_sf_fpu_8087_da[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDB:
ops_sf_fpu_8087_db[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDC:
ops_sf_fpu_8087_dc[(rmdat >> 3) & 0x1f]((uint32_t) rmdat);
break;
case 0xDD:
ops_sf_fpu_8087_dd[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDE:
ops_sf_fpu_8087_de[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDF:
ops_sf_fpu_8087_df[rmdat & 0xff]((uint32_t) rmdat);
break;
}
} else {
switch (opcode) {
case 0xD8:
ops_fpu_8087_d8[(rmdat >> 3) & 0x1f]((uint32_t) rmdat);
break;
case 0xD9:
ops_fpu_8087_d9[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDA:
ops_fpu_8087_da[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDB:
ops_fpu_8087_db[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDC:
ops_fpu_8087_dc[(rmdat >> 3) & 0x1f]((uint32_t) rmdat);
break;
case 0xDD:
ops_fpu_8087_dd[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDE:
ops_fpu_8087_de[rmdat & 0xff]((uint32_t) rmdat);
break;
case 0xDF:
ops_fpu_8087_df[rmdat & 0xff]((uint32_t) rmdat);
break;
}
}
}
cpu_state.pc = tempw; /* Do this as the x87 code advances it, which is needed on
the 286+ core, but not here. */
wait(1, 0);