weeemu/weee
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

rfi

Browse Source
This commit is contained in:
iris
2026-05-15 09:45:26 +02:00
parent 9a2d437b24
commit 723e66871d
5 changed files with 52 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
core/broadway.cpp
+15 -2
View File
@@ -40,7 +40,20 @@ void broadway::decode_special(ircolib::u32 instr, mem &mem) {
add(instr);
break;
default:
ircolib::panic("broadway unknown special 0x{:04X}", utils::secondary(instr));
ircolib::panic("broadway unknown special 0x{:04X} (pc 0x{:08X})", utils::secondary(instr), pc - 4);
}
}
void broadway::decode_branch(ircolib::u32 instr, mem &mem) {
switch (utils::secondary(instr)) {
case 0x10:
bclrx(instr);
break;
case 0x32:
rfi(instr);
break;
default:
ircolib::panic("broadway unknown branch 0x{:04X} (pc 0x{:08X})", utils::secondary(instr), pc - 4);
}
}
@@ -62,7 +75,7 @@ void broadway::execute(ircolib::u32 instr, mem &mem) {
bx(instr);
break;
case 19:
bclrx(instr);
decode_branch(instr, mem);
break;
case 21:
rlwinm(instr);
core/broadway.hpp
+3 -1
View File
@@ -17,7 +17,7 @@ struct broadway {
void execute(ircolib::u32, mem &);
bool disasm_available = true;
ircolib::u32 pc = 0, lr = 0, ctr = 0, cr = 0;
ircolib::u32 pc = 0, lr = 0, ctr = 0, cr = 0, srr0;
union {
struct {
unsigned bytecount : 7;
@@ -37,6 +37,7 @@ struct broadway {
// instructions
void decode_special(ircolib::u32, mem &);
void decode_branch(ircolib::u32, mem &);
void add(ircolib::u32);
void addis(ircolib::u32);
@@ -55,5 +56,6 @@ struct broadway {
void cmpi(ircolib::u32);
void rlwinm(ircolib::u32);
void lwzu(ircolib::u32, mem &);
void rfi(ircolib::u32);
};
} // namespace weee::core
core/broadway/instructions.cpp
+20 -4
View File
@@ -94,8 +94,15 @@ void broadway::mfspr(ircolib::u32 instr) {
case 0b0100100000:
gpr[utils::RD(instr)] = ctr;
break;
case 0b1101000000:
gpr[utils::RD(instr)] = srr0;
break;
case 0b1101100000:
// srr1
break;
default:
ircolib::panic("broadway::mfspr with unimplemented spr field of value 0x{:04X}", spr_field);
ircolib::panic("broadway::mfspr with unimplemented spr field of value 0x{:04X} (pc 0x{:08X})", spr_field,
pc - 4);
}
}
@@ -111,8 +118,15 @@ void broadway::mtspr(ircolib::u32 instr) {
case 0b0100100000:
ctr = gpr[utils::RS(instr)];
break;
case 0b1101000000:
srr0 = gpr[utils::RS(instr)];
break;
case 0b1101100000:
// srr1
break;
default:
ircolib::panic("broadway::mtspr with unimplemented spr field of value 0x{:04X}", spr_field);
ircolib::panic("broadway::mtspr with unimplemented spr field of value 0x{:04X} (pc 0x{:08X})", spr_field,
pc - 4);
}
}
@@ -161,10 +175,10 @@ void broadway::bclrx(ircolib::u32 instr) {
if (!ircolib::is_bit_set<ircolib::u32, 25>(instr)) {
if (!ircolib::is_bit_set<ircolib::u32, 24>(instr))
ircolib::panic("broadway::bclrx unimplemented variants with bit 24 == 0");
ircolib::panic("broadway::bclrx unimplemented variants with bit 24 == 0 (pc 0x{:08X})", pc - 4);
if (!ircolib::is_bit_set<ircolib::u32, 23>(instr))
ircolib::panic("broadway::bclrx unimplemented variants with bit 23 == 0");
ircolib::panic("broadway::bclrx unimplemented variants with bit 23 == 0 (pc 0x{:08X})", pc - 4);
const ircolib::u8 bi = (instr >> 16) & 0x1f;
@@ -241,4 +255,6 @@ void broadway::lwzu(ircolib::u32 instr, mem &mem) {
gpr[utils::RD(instr)] = mem.read32(EA);
gpr[utils::RA(instr)] = EA;
}
void broadway::rfi(ircolib::u32 instr) { pc = srr0; }
} // namespace weee::core
core/broadway/utils.hpp
+1 -1
View File
@@ -3,7 +3,7 @@
namespace weee::core::utils {
static inline ircolib::u8 primary(ircolib::u32 instr) { return (instr >> 26) & 0x3f; }
static inline ircolib::u16 secondary(ircolib::u32 instr) { return (instr >> 1) & 0x1ff; }
static inline ircolib::u16 secondary(ircolib::u32 instr) { return (instr >> 1) & 0x3ff; }
static inline ircolib::u8 RD(ircolib::u32 instr) { return (instr >> 21) & 0x1f; }
static inline ircolib::u8 RB(ircolib::u32 instr) { return (instr >> 11) & 0x1f; }
static inline ircolib::u8 RS(ircolib::u32 instr) { return RD(instr); }