Macintosh-Tools/dingusppc
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Implemented fctiw(z)(.)

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dingusdev 2020-02-16 13:40:55 -07:00
parent 839c97b665
commit 3c06e8b30a
1 changed files with 61 additions and 28 deletions
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89
cpu/ppc/ppcfpopcodes.cpp
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@ -204,6 +204,26 @@ void ppc_divbyzero(uint64_t input_a, uint64_t input_b, bool is_single) {
}
}
int64_t round_to_nearest(double f) {
if (f >= 0.0) {
return (int32_t)(int64_t)(f + 0.5);
}
else {
return (int32_t)(-(int64_t)(-f + 0.5));
}
}
int64_t round_to_zero(double f) {
return (int32_t)(f);
}
int64_t round_to_pos_inf(double f) {
return (int32_t)(ceil(f));
}
int64_t round_to_neg_inf(double f) {
return (int32_t)(floor(f));
}
bool ppc_confirm_inf_nan(uint64_t input_a, uint64_t input_b, bool is_single, uint32_t op) {
if (is_single) {
@ -302,24 +322,27 @@ void ppc_fpresult_update(uint64_t set_result, bool confirm_arc) {
ppc_state.ppc_fpscr |= 0x80010000;
ppc_state.ppc_fpscr &= 0xFFFF0FFF;
if (set_result < 0) {
ppc_state.ppc_fpscr |= 0x8000;
}
else if (set_result > 0) {
ppc_state.ppc_fpscr |= 0x4000;
}
else if (set_result == 0) {
if (set_result == 0) {
ppc_state.ppc_fpscr |= 0x2000;
}
else {
ppc_state.ppc_fpscr |= 0x1000;
if (set_result < 0) {
ppc_state.ppc_fpscr |= 0x8000;
}
else if (set_result > 0) {
ppc_state.ppc_fpscr |= 0x4000;
}
else {
ppc_state.ppc_fpscr |= 0x1000;
}
}
}
}
void ppc_frsqrte_result() {
if (ppc_result64_d) {
if (ppc_result64_d & 0x007FF000000000000UL) {
}
}
@ -833,41 +856,51 @@ void ppc_fresdot() {
}
void ppc_fctiw() {
//PLACEHOLDER!
ppc_grab_regsfpdiab(false);
ppc_grab_regsfpdb(false);
ppc_result_d = (uint32_t)(ppc_dblresult64_d);
switch (ppc_state.ppc_fpscr & 0x3) {
case 0:
ppc_result64_d = round_to_nearest(ppc_dblresult64_b);
case 1:
ppc_result64_d = round_to_zero(ppc_dblresult64_b);
case 2:
ppc_result64_d = round_to_pos_inf(ppc_dblresult64_b);
case 3:
ppc_result64_d = round_to_neg_inf(ppc_dblresult64_b);
}
ppc_store_dfpresult(true);
ppc_store_result_regd();
}
void ppc_fctiwdot() {
//PLACEHOLDER!
ppc_grab_regsfpdiab(false);
ppc_grab_regsfpdb(false);
ppc_result_d = (uint32_t)(ppc_dblresult64_d);
switch (ppc_state.ppc_fpscr & 0x3) {
case 0:
ppc_result64_d = round_to_nearest(ppc_dblresult64_b);
case 1:
ppc_result64_d = round_to_zero(ppc_dblresult64_b);
case 2:
ppc_result64_d = round_to_pos_inf(ppc_dblresult64_b);
case 3:
ppc_result64_d = round_to_neg_inf(ppc_dblresult64_b);
}
ppc_store_result_regd();
ppc_store_dfpresult(true);
ppc_changecrf1();
}
void ppc_fctiwz() {
//PLACEHOLDER!
ppc_grab_regsfpdiab(false);
double testd1 = (double)ppc_result64_a;
ppc_result_d = (uint32_t)(testd1);
ppc_grab_regsfpdb(false);
ppc_result64_d = round_to_zero(ppc_dblresult64_b);
ppc_store_result_regd();
}
void ppc_fctiwzdot() {
//PLACEHOLDER!
ppc_grab_regsfpdiab(false);
double testd1 = (double)ppc_result64_a;
ppc_result_d = (uint32_t)(testd1);
ppc_grab_regsfpdb(false);
ppc_result64_d = round_to_zero(ppc_dblresult64_b);
ppc_store_result_regd();
ppc_changecrf1();