Macintosh-Tools/dingusppc
1
0
Fork 0
mirror of https://github.com/dingusdev/dingusppc.git synced 2025-01-11 05:29:43 +00:00
Code Issues Projects Releases Wiki Activity

ppcfpopcodes: fix mtfsb0 & mtfsb1 emulation.

Browse Source
This commit is contained in:
Maxim Poliakovski 2021-07-09 01:02:44 +02:00
parent 48a65279e1
commit 22a15f4780
1 changed files with 14 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
cpu/ppc/ppcfpopcodes.cpp
View File

@ -674,11 +674,11 @@ void dppc_interpreter::ppc_fctiw() {
if (std::isnan(val_reg_b)) {
ppc_state.fpr[reg_d].int64_r = 0x80000000;
ppc_state.fpscr |= 0x1000100;
}
}
else if (val_reg_b > static_cast<double>(0x7fffffff)) {
ppc_state.fpr[reg_d].int64_r = 0x7fffffff;
ppc_state.fpscr |= 0x100;
}
}
else if (val_reg_b < -static_cast<double>(0x80000000)) {
ppc_state.fpr[reg_d].int64_r = 0x80000000;
ppc_state.fpscr |= 0x100;
@ -696,7 +696,7 @@ void dppc_interpreter::ppc_fctiw() {
}
ppc_store_dfpresult_int(reg_d);
}
if (rc_flag)
@ -710,15 +710,15 @@ void dppc_interpreter::ppc_fctiwz() {
if (std::isnan(val_reg_b)) {
ppc_state.fpr[reg_d].int64_r = 0x80000000;
ppc_state.fpscr |= 0x1000100;
}
}
else if (val_reg_b > static_cast<double>(0x7fffffff)) {
ppc_state.fpr[reg_d].int64_r = 0x7fffffff;
ppc_state.fpscr |= 0x100;
}
}
else if (val_reg_b < -static_cast<double>(0x80000000)) {
ppc_state.fpr[reg_d].int64_r = 0x80000000;
ppc_state.fpscr |= 0x100;
}
}
else {
ppc_result64_d = round_to_zero(val_reg_b);
@ -964,35 +964,31 @@ void dppc_interpreter::ppc_mtfsfidot() {
}
void dppc_interpreter::ppc_mtfsb0() {
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
crf_d = (ppc_cur_instruction >> 21) & 0x1F;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr &= ~(1 << (31 - crf_d));
ppc_state.fpscr &= ~(0x80000000UL >> crf_d);
}
}
void dppc_interpreter::ppc_mtfsb0dot() {
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
crf_d = (ppc_cur_instruction >> 21) & 0x1F;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr &= ~(1 << crf_d);
ppc_state.fpscr &= ~(0x80000000UL >> crf_d);
}
ppc_fp_changecrf1();
}
void dppc_interpreter::ppc_mtfsb1() {
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
crf_d = (ppc_cur_instruction >> 21) & 0x1F;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr |= (1 << crf_d);
ppc_state.fpscr |= (0x80000000UL >> crf_d);
}
}
void dppc_interpreter::ppc_mtfsb1dot() {
crf_d = (ppc_cur_instruction >> 23) & 7;
crf_d = crf_d << 2;
crf_d = (ppc_cur_instruction >> 21) & 0x1F;
if ((crf_d == 0) || (crf_d > 2)) {
ppc_state.fpscr |= (1 << crf_d);
ppc_state.fpscr |= (0x80000000UL >> crf_d);
}
ppc_fp_changecrf1();
}