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cpu/jaguar: Fixed SUBC opcode. Added special case for internal RAM loads and stores.

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This commit is contained in:
Ville Linde 2013-02-15 01:46:36 +00:00
parent f56c9ad13b
commit 44ebb6ab2d
1 changed files with 67 additions and 10 deletions
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77
src/emu/cpu/jaguar/jaguar.c
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@ -102,6 +102,9 @@ struct jaguar_cpu_state
legacy_cpu_device *device;
address_space *program;
direct_read_data *direct;
UINT32 internal_ram_start;
UINT32 internal_ram_end;
};
@ -427,6 +430,17 @@ static void init_common(int isdsp, legacy_cpu_device *device, device_irq_acknowl
device->save_item(NAME(jaguar->ctrl));
device->save_item(NAME(jaguar->ppc));
device->machine().save().register_postload(save_prepost_delegate(FUNC(jaguar_postload), jaguar));
if (isdsp)
{
jaguar->internal_ram_start = 0xf1b000;
jaguar->internal_ram_end = 0xf1cfff;
}
else
{
jaguar->internal_ram_start = 0xf03000;
jaguar->internal_ram_end = 0xf03fff;
}
}
@ -805,20 +819,41 @@ void load_r15rn_rn(jaguar_cpu_state *jaguar, UINT16 op)
void loadb_rn_rn(jaguar_cpu_state *jaguar, UINT16 op)
{
UINT32 r1 = jaguar->r[(op >> 5) & 31];
jaguar->r[op & 31] = READBYTE(jaguar, r1);
if (r1 >= jaguar->internal_ram_start && r1 <= jaguar->internal_ram_end)
{
jaguar->r[op & 31] = READLONG(jaguar, r1 & ~3);
}
else
{
jaguar->r[op & 31] = READBYTE(jaguar, r1);
}
}
void loadw_rn_rn(jaguar_cpu_state *jaguar, UINT16 op)
{
UINT32 r1 = jaguar->r[(op >> 5) & 31];
jaguar->r[op & 31] = READWORD(jaguar, r1);
if (r1 >= jaguar->internal_ram_start && r1 <= jaguar->internal_ram_end)
{
jaguar->r[op & 31] = READLONG(jaguar, r1 & ~3);
}
else
{
jaguar->r[op & 31] = READWORD(jaguar, r1);
}
}
void loadp_rn_rn(jaguar_cpu_state *jaguar, UINT16 op) /* GPU only */
{
UINT32 r1 = jaguar->r[(op >> 5) & 31];
jaguar->ctrl[G_HIDATA] = READWORD(jaguar, r1);
jaguar->r[op & 31] = READWORD(jaguar, r1+4);
if (r1 >= jaguar->internal_ram_start && r1 <= jaguar->internal_ram_end)
{
jaguar->r[op & 31] = READLONG(jaguar, r1 & ~3);
}
else
{
jaguar->ctrl[G_HIDATA] = READLONG(jaguar, r1);
jaguar->r[op & 31] = READLONG(jaguar, r1+4);
}
}
void mirror_rn(jaguar_cpu_state *jaguar, UINT16 op) /* DSP only */
@ -1151,20 +1186,41 @@ void store_rn_r15rn(jaguar_cpu_state *jaguar, UINT16 op)
void storeb_rn_rn(jaguar_cpu_state *jaguar, UINT16 op)
{
UINT32 r1 = jaguar->r[(op >> 5) & 31];
WRITEBYTE(jaguar, r1, jaguar->r[op & 31]);
if (r1 >= jaguar->internal_ram_start && r1 <= jaguar->internal_ram_end)
{
WRITELONG(jaguar, r1 & ~3, jaguar->r[op & 31]);
}
else
{
WRITEBYTE(jaguar, r1, jaguar->r[op & 31]);
}
}
void storew_rn_rn(jaguar_cpu_state *jaguar, UINT16 op)
{
UINT32 r1 = jaguar->r[(op >> 5) & 31];
WRITEWORD(jaguar, r1, jaguar->r[op & 31]);
if (r1 >= jaguar->internal_ram_start && r1 <= jaguar->internal_ram_end)
{
WRITELONG(jaguar, r1 & ~3, jaguar->r[op & 31]);
}
else
{
WRITEWORD(jaguar, r1, jaguar->r[op & 31]);
}
}
void storep_rn_rn(jaguar_cpu_state *jaguar, UINT16 op) /* GPU only */
{
UINT32 r1 = jaguar->r[(op >> 5) & 31];
WRITELONG(jaguar, r1, jaguar->ctrl[G_HIDATA]);
WRITELONG(jaguar, r1+4, jaguar->r[op & 31]);
if (r1 >= jaguar->internal_ram_start && r1 <= jaguar->internal_ram_end)
{
WRITELONG(jaguar, r1 & ~3, jaguar->r[op & 31]);
}
else
{
WRITELONG(jaguar, r1, jaguar->ctrl[G_HIDATA]);
WRITELONG(jaguar, r1+4, jaguar->r[op & 31]);
}
}
void sub_rn_rn(jaguar_cpu_state *jaguar, UINT16 op)
@ -1182,9 +1238,10 @@ void subc_rn_rn(jaguar_cpu_state *jaguar, UINT16 op)
int dreg = op & 31;
UINT32 r1 = jaguar->r[(op >> 5) & 31];
UINT32 r2 = jaguar->r[dreg];
UINT32 res = r2 - r1 - ((jaguar->FLAGS >> 1) & 1);
UINT32 c = ((jaguar->FLAGS >> 1) & 1);
UINT32 res = r2 - r1 - c;
jaguar->r[dreg] = res;
CLR_ZNC(jaguar); SET_ZNC_SUB(jaguar, r2, r1, res);
CLR_ZNC(jaguar); SET_ZNC_SUB(jaguar, r2, r1 + c, res);
}
void subq_n_rn(jaguar_cpu_state *jaguar, UINT16 op)