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447b748dee0431007c9ec8899da38768060232e1
ARMSX1/psx/cpu.c
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allkern 32088d682e Several fixes 
RAM mirroring implemented
DMA IRQ signal fix
2023-09-15 18:33:39 -03:00

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#include "cpu.h"
#include "bus.h"
#include "log.h"
#include <stdlib.h>
#include <string.h>
static const psx_cpu_instruction_t g_psx_cpu_secondary_table[] = {
psx_cpu_i_sll , psx_cpu_i_invalid, psx_cpu_i_srl , psx_cpu_i_sra ,
psx_cpu_i_sllv , psx_cpu_i_invalid, psx_cpu_i_srlv , psx_cpu_i_srav ,
psx_cpu_i_jr , psx_cpu_i_jalr , psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_syscall, psx_cpu_i_break , psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_mfhi , psx_cpu_i_mthi , psx_cpu_i_mflo , psx_cpu_i_mtlo ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_mult , psx_cpu_i_multu , psx_cpu_i_div , psx_cpu_i_divu ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_add , psx_cpu_i_addu , psx_cpu_i_sub , psx_cpu_i_subu ,
psx_cpu_i_and , psx_cpu_i_or , psx_cpu_i_xor , psx_cpu_i_nor ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_slt , psx_cpu_i_sltu ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid
};
static const psx_cpu_instruction_t g_psx_cpu_primary_table[] = {
psx_cpu_i_special, psx_cpu_i_bxx , psx_cpu_i_j , psx_cpu_i_jal ,
psx_cpu_i_beq , psx_cpu_i_bne , psx_cpu_i_blez , psx_cpu_i_bgtz ,
psx_cpu_i_addi , psx_cpu_i_addiu , psx_cpu_i_slti , psx_cpu_i_sltiu ,
psx_cpu_i_andi , psx_cpu_i_ori , psx_cpu_i_xori , psx_cpu_i_lui ,
psx_cpu_i_cop0 , psx_cpu_i_cop1 , psx_cpu_i_cop2 , psx_cpu_i_cop3 ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_lb , psx_cpu_i_lh , psx_cpu_i_lwl , psx_cpu_i_lw ,
psx_cpu_i_lbu , psx_cpu_i_lhu , psx_cpu_i_lwr , psx_cpu_i_invalid,
psx_cpu_i_sb , psx_cpu_i_sh , psx_cpu_i_swl , psx_cpu_i_sw ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_swr , psx_cpu_i_invalid,
psx_cpu_i_lwc0 , psx_cpu_i_lwc1 , psx_cpu_i_lwc2 , psx_cpu_i_lwc3 ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_swc0 , psx_cpu_i_swc1 , psx_cpu_i_swc2 , psx_cpu_i_swc3 ,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid
};
static const psx_cpu_instruction_t g_psx_cpu_cop0_table[] = {
psx_cpu_i_mfc0 , psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_mtc0 , psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_rfe , psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid
};
static const psx_cpu_instruction_t g_psx_cpu_cop2_table[] = {
psx_cpu_i_mfc2 , psx_cpu_i_invalid, psx_cpu_i_cfc2 , psx_cpu_i_invalid,
psx_cpu_i_mtc2 , psx_cpu_i_invalid, psx_cpu_i_ctc2 , psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid, psx_cpu_i_invalid,
psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte ,
psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte ,
psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte ,
psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte , psx_cpu_i_gte
};
static const psx_cpu_instruction_t g_psx_cpu_bxx_table[] = {
psx_cpu_i_bltz , psx_cpu_i_bgez , psx_cpu_i_bltz , psx_cpu_i_bgez ,
psx_cpu_i_bltz , psx_cpu_i_bgez , psx_cpu_i_bltz , psx_cpu_i_bgez ,
psx_cpu_i_bltz , psx_cpu_i_bgez , psx_cpu_i_bltz , psx_cpu_i_bgez ,
psx_cpu_i_bltz , psx_cpu_i_bgez , psx_cpu_i_bltz , psx_cpu_i_bgez ,
psx_cpu_i_bltzal , psx_cpu_i_bgezal , psx_cpu_i_bltz , psx_cpu_i_bgez ,
psx_cpu_i_bltz , psx_cpu_i_bgez , psx_cpu_i_bltz , psx_cpu_i_bgez ,
psx_cpu_i_bltz , psx_cpu_i_bgez , psx_cpu_i_bltz , psx_cpu_i_bgez ,
psx_cpu_i_bltz , psx_cpu_i_bgez , psx_cpu_i_bltz , psx_cpu_i_bgez
};
static const psx_cpu_instruction_t g_psx_gte_table[] = {
psx_gte_i_invalid, psx_gte_i_rtps , psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_nclip , psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_op , psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_dpcs , psx_gte_i_intpl , psx_gte_i_mvmva , psx_gte_i_ncds ,
psx_gte_i_cdp , psx_gte_i_invalid, psx_gte_i_ncdt , psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_nccs ,
psx_gte_i_cc , psx_gte_i_invalid, psx_gte_i_ncs , psx_gte_i_invalid,
psx_gte_i_nct , psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_sqr , psx_gte_i_dcpl , psx_gte_i_dpct , psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_avsz3 , psx_gte_i_avsz4 , psx_gte_i_invalid,
psx_gte_i_rtpt , psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid, psx_gte_i_invalid,
psx_gte_i_invalid, psx_gte_i_gpf , psx_gte_i_gpl , psx_gte_i_ncct
};
static const uint32_t g_psx_cpu_cop0_write_mask_table[] = {
0x00000000, // cop0r0 - N/A
0x00000000, // cop0r1 - N/A
0x00000000, // cop0r2 - N/A
0xffffffff, // BPC - Breakpoint on execute (R/W)
0x00000000, // cop0r4 - N/A
0xffffffff, // BDA - Breakpoint on data access (R/W)
0x00000000, // JUMPDEST - Randomly memorized jump address (R)
0xffc0f03f, // DCIC - Breakpoint control (R/W)
0x00000000, // BadVaddr - Bad Virtual Address (R)
0xffffffff, // BDAM - Data Access breakpoint mask (R/W)
0x00000000, // cop0r10 - N/A
0xffffffff, // BPCM - Execute breakpoint mask (R/W)
0xffffffff, // SR - System status register (R/W)
0x00000300, // CAUSE - Describes the most recently recognised exception (R)
0x00000000, // EPC - Return Address from Trap (R)
0x00000000 // PRID - Processor ID (R)
};
// To-do: Commented out until we properly implement GTE
// static const uint8_t g_psx_gte_unr_table[] = {
// 0xff, 0xfd, 0xfb, 0xf9, 0xf7, 0xf5, 0xf3, 0xf1,
// 0xef, 0xee, 0xec, 0xea, 0xe8, 0xe6, 0xe4, 0xe3,
// 0xe1, 0xdf, 0xdd, 0xdc, 0xda, 0xd8, 0xd6, 0xd5,
// 0xd3, 0xd1, 0xd0, 0xce, 0xcd, 0xcb, 0xc9, 0xc8,
// 0xc6, 0xc5, 0xc3, 0xc1, 0xc0, 0xbe, 0xbd, 0xbb,
// 0xba, 0xb8, 0xb7, 0xb5, 0xb4, 0xb2, 0xb1, 0xb0,
// 0xae, 0xad, 0xab, 0xaa, 0xa9, 0xa7, 0xa6, 0xa4,
// 0xa3, 0xa2, 0xa0, 0x9f, 0x9e, 0x9c, 0x9b, 0x9a,
// 0x99, 0x97, 0x96, 0x95, 0x94, 0x92, 0x91, 0x90,
// 0x8f, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x87, 0x86,
// 0x85, 0x84, 0x83, 0x82, 0x81, 0x7f, 0x7e, 0x7d,
// 0x7c, 0x7b, 0x7a, 0x79, 0x78, 0x77, 0x75, 0x74,
// 0x73, 0x72, 0x71, 0x70, 0x6f, 0x6e, 0x6d, 0x6c,
// 0x6b, 0x6a, 0x69, 0x68, 0x67, 0x66, 0x65, 0x64,
// 0x63, 0x62, 0x61, 0x60, 0x5f, 0x5e, 0x5d, 0x5d,
// 0x5c, 0x5b, 0x5a, 0x59, 0x58, 0x57, 0x56, 0x55,
// 0x54, 0x53, 0x53, 0x52, 0x51, 0x50, 0x4f, 0x4e,
// 0x4d, 0x4d, 0x4c, 0x4b, 0x4a, 0x49, 0x48, 0x48,
// 0x47, 0x46, 0x45, 0x44, 0x43, 0x43, 0x42, 0x41,
// 0x40, 0x3f, 0x3f, 0x3e, 0x3d, 0x3c, 0x3c, 0x3b,
// 0x3a, 0x39, 0x39, 0x38, 0x37, 0x36, 0x36, 0x35,
// 0x34, 0x33, 0x33, 0x32, 0x31, 0x31, 0x30, 0x2f,
// 0x2e, 0x2e, 0x2d, 0x2c, 0x2c, 0x2b, 0x2a, 0x2a,
// 0x29, 0x28, 0x28, 0x27, 0x26, 0x26, 0x25, 0x24,
// 0x24, 0x23, 0x22, 0x22, 0x21, 0x20, 0x20, 0x1f,
// 0x1e, 0x1e, 0x1d, 0x1d, 0x1c, 0x1b, 0x1b, 0x1a,
// 0x19, 0x19, 0x18, 0x18, 0x17, 0x16, 0x16, 0x15,
// 0x15, 0x14, 0x14, 0x13, 0x12, 0x12, 0x11, 0x11,
// 0x10, 0x0f, 0x0f, 0x0e, 0x0e, 0x0d, 0x0d, 0x0c,
// 0x0c, 0x0b, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08,
// 0x07, 0x07, 0x06, 0x06, 0x05, 0x05, 0x04, 0x04,
// 0x03, 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00,
// 0x00
// };
#define OP ((cpu->opcode >> 26) & 0x3f)
#define S ((cpu->opcode >> 21) & 0x1f)
#define T ((cpu->opcode >> 16) & 0x1f)
#define D ((cpu->opcode >> 11) & 0x1f)
#define IMM5 ((cpu->opcode >> 6) & 0x1f)
#define CMT ((cpu->opcode >> 6) & 0xfffff)
#define SOP (cpu->opcode & 0x3f)
#define IMM26 (cpu->opcode & 0x3ffffff)
#define IMM16 (cpu->opcode & 0xffff)
#define IMM16S ((int32_t)((int16_t)IMM16))
#define COP2_DR(idx) ((uint32_t*)(&cpu->cop2_dr))[idx]
#define COP2_CR(idx) ((uint32_t*)(&cpu->cop2_cr))[idx]
#define R_R0 (cpu->r[0])
#define R_A0 (cpu->r[4])
#define R_RA (cpu->r[31])
//#define CPU_TRACE
#ifdef CPU_TRACE
#define TRACE_M(m) \
log_trace("%08x: %-7s $%s, %+i($%s)", cpu->pc-8, m, g_mips_cc_register_names[T], IMM16S, g_mips_cc_register_names[S])
#define TRACE_I16S(m) \
log_trace("%08x: %-7s $%s, 0x%04x", cpu->pc-8, m, g_mips_cc_register_names[T], IMM16)
#define TRACE_I16D(m) \
log_trace("%08x: %-7s $%s, $%s, 0x%04x", cpu->pc-8, m, g_mips_cc_register_names[T], g_mips_cc_register_names[S], IMM16)
#define TRACE_I5D(m) \
log_trace("%08x: %-7s $%s, $%s, %u", cpu->pc-8, m, g_mips_cc_register_names[D], g_mips_cc_register_names[T], IMM5)
#define TRACE_I26(m) \
log_trace("%08x: %-7s 0x%07x", cpu->pc-8, m, ((cpu->pc & 0xf0000000) | (IMM26 << 2)))
#define TRACE_RT(m) \
log_trace("%08x: %-7s $%s, $%s, $%s", cpu->pc-8, m, g_mips_cc_register_names[D], g_mips_cc_register_names[S], g_mips_cc_register_names[T])
#define TRACE_C0M(m) \
log_trace("%08x: %-7s $%s, $%s", cpu->pc-8, m, g_mips_cc_register_names[T], g_mips_cop0_register_names[D])
#define TRACE_C2M(m) \
log_trace("%08x: %-7s $%s, $cop2_r%u", cpu->pc-8, m, g_mips_cc_register_names[T], D)
#define TRACE_C2MC(m) \
log_trace("%08x: %-7s $%s, $cop2_r%u", cpu->pc-8, m, g_mips_cc_register_names[T], D + 32)
#define TRACE_B(m) \
log_trace("%08x: %-7s $%s, $%s, %-i", cpu->pc-8, m, g_mips_cc_register_names[S], g_mips_cc_register_names[T], IMM16S << 2)
#define TRACE_RS(m) \
log_trace("%08x: %-7s $%s", cpu->pc-8, m, g_mips_cc_register_names[S])
#define TRACE_MTF(m) \
log_trace("%08x: %-7s $%s", cpu->pc-8, m, g_mips_cc_register_names[D])
#define TRACE_RD(m) \
log_trace("%08x: %-7s $%s, $%s", cpu->pc-8, m, g_mips_cc_register_names[D], g_mips_cc_register_names[S])
#define TRACE_MD(m) \
log_trace("%08x: %-7s $%s, $%s", cpu->pc-8, m, g_mips_cc_register_names[S], g_mips_cc_register_names[T]);
#define TRACE_I20(m) \
log_trace("%08x: %-7s 0x%05x", cpu->pc-8, m, CMT);
#define TRACE_N(m) \
log_trace("%08x: %-7s", cpu->pc-8, m);
#else
#define TRACE_M(m)
#define TRACE_I16S(m)
#define TRACE_I16D(m)
#define TRACE_I5D(m)
#define TRACE_I26(m)
#define TRACE_RT(m)
#define TRACE_C0M(m)
#define TRACE_C2M(m)
#define TRACE_C2MC(m)
#define TRACE_B(m)
#define TRACE_RS(m)
#define TRACE_MTF(m)
#define TRACE_RD(m)
#define TRACE_MD(m)
#define TRACE_I20(m)
#define TRACE_N(m)
#endif
#define DO_PENDING_LOAD \
cpu->r[cpu->load_d] = cpu->load_v; \
R_R0 = 0; \
cpu->load_v = 0xffffffff; \
cpu->load_d = 0;
#ifdef CPU_TRACE
#define DEBUG_ALL \
log_fatal("r0=%08x at=%08x v0=%08x v1=%08x", cpu->r[0] , cpu->r[1] , cpu->r[2] , cpu->r[3] ); \
log_fatal("a0=%08x a1=%08x a2=%08x a3=%08x", cpu->r[4] , cpu->r[5] , cpu->r[6] , cpu->r[7] ); \
log_fatal("t0=%08x t1=%08x t2=%08x t3=%08x", cpu->r[8] , cpu->r[9] , cpu->r[10], cpu->r[11]); \
log_fatal("t4=%08x t5=%08x t6=%08x t7=%08x", cpu->r[12], cpu->r[13], cpu->r[14], cpu->r[15]); \
log_fatal("s0=%08x s1=%08x s2=%08x s3=%08x", cpu->r[16], cpu->r[17], cpu->r[18], cpu->r[19]); \
log_fatal("s4=%08x s5=%08x s6=%08x s7=%08x", cpu->r[20], cpu->r[21], cpu->r[22], cpu->r[23]); \
log_fatal("t8=%08x t9=%08x k0=%08x k1=%08x", cpu->r[24], cpu->r[25], cpu->r[26], cpu->r[27]); \
log_fatal("gp=%08x sp=%08x fp=%08x ra=%08x", cpu->r[28], cpu->r[29], cpu->r[30], cpu->r[31]); \
log_fatal("pc=%08x hi=%08x lo=%08x l:%s=%08x", cpu->pc, cpu->hi, cpu->lo, g_mips_cc_register_names[cpu->load_d], cpu->load_v); \
exit(1)
const char* g_mips_cop0_register_names[] = {
"cop0_r0",
"cop0_r1",
"cop0_r2",
"cop0_bpc",
"cop0_r4",
"cop0_bda",
"cop0_jumpdest",
"cop0_dcic",
"cop0_badvaddr",
"cop0_bdam",
"cop0_r10",
"cop0_bpcm",
"cop0_sr",
"cop0_cause",
"cop0_epc",
"cop0_prid"
};
static const char* g_mips_cc_register_names[] = {
"r0", "at", "v0", "v1", "a0", "a1", "a2", "a3",
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
"t8", "t9", "k0", "k1", "gp", "sp", "fp", "ra"
};
static const char* g_psx_cpu_syscall_function_symbol_table[] = {
"NoFunction",
"EnterCriticalSection",
"ExitCriticalSection",
"ChangeThreadSubFunction"
// DeliverEvent (invalid)
};
#endif
#define SE8(v) ((int32_t)((int8_t)v))
#define SE16(v) ((int32_t)((int16_t)v))
#define BRANCH(offset) \
cpu->next_pc = cpu->next_pc + (offset); \
cpu->next_pc = cpu->next_pc - 4; \
cpu->branch = 1; \
cpu->branch_taken = 1;
void cpu_a_kcall_hook(psx_cpu_t* cpu) {
switch (cpu->r[9]) {
case 0x09: putc(R_A0, stdout); break;
case 0x3c: putchar(R_A0); break;
case 0x3e: {
uint32_t src = R_A0;
char c = psx_bus_read8(cpu->bus, src++);
while (c) {
putchar(c);
c = psx_bus_read8(cpu->bus, src++);
}
} break;
}
}
void cpu_b_kcall_hook(psx_cpu_t* cpu) {
switch (cpu->r[9]) {
case 0x3b: putc(R_A0, stdout); break;
case 0x3d: putchar(R_A0); break;
case 0x3f: {
uint32_t src = R_A0;
char c = psx_bus_read8(cpu->bus, src++);
while (c) {
putchar(c);
c = psx_bus_read8(cpu->bus, src++);
}
} break;
}
}
psx_cpu_t* psx_cpu_create() {
return (psx_cpu_t*)malloc(sizeof(psx_cpu_t));
}
void cpu_a_kcall_hook(psx_cpu_t*);
void cpu_b_kcall_hook(psx_cpu_t*);
void psx_cpu_fetch(psx_cpu_t* cpu) {
//cpu->buf[0] = psx_bus_read32(cpu->bus, cpu->pc);
//cpu->pc += 4;
// Discard fetch cycles
psx_bus_get_access_cycles(cpu->bus);
}
void psx_cpu_destroy(psx_cpu_t* cpu) {
free(cpu);
}
void psx_cpu_set_a_kcall_hook(psx_cpu_t* cpu, psx_cpu_kcall_hook_t hook) {
cpu->a_function_hook = hook;
}
void psx_cpu_set_b_kcall_hook(psx_cpu_t* cpu, psx_cpu_kcall_hook_t hook) {
cpu->b_function_hook = hook;
}
void psx_cpu_save_state(psx_cpu_t* cpu, FILE* file) {
fwrite((char*)cpu, sizeof(*cpu) - sizeof(psx_bus_t*), 1, file);
}
void psx_cpu_load_state(psx_cpu_t* cpu, FILE* file) {
fread((char*)cpu, sizeof(*cpu) - sizeof(psx_bus_t*), 1, file);
}
void psx_cpu_init(psx_cpu_t* cpu, psx_bus_t* bus) {
memset(cpu, 0, sizeof(psx_cpu_t));
psx_cpu_set_a_kcall_hook(cpu, cpu_a_kcall_hook);
psx_cpu_set_b_kcall_hook(cpu, cpu_b_kcall_hook);
cpu->bus = bus;
cpu->pc = 0xbfc00000;
cpu->next_pc = cpu->pc + 4;
cpu->cop0_r[COP0_SR] = 0x10900000;
cpu->cop0_r[COP0_PRID] = 0x00000002;
}
void psx_cpu_cycle(psx_cpu_t* cpu) {
if ((cpu->pc & 0x3fffffff) == 0x000000b4)
if (cpu->b_function_hook) cpu->b_function_hook(cpu);
cpu->saved_pc = cpu->pc;
cpu->delay_slot = cpu->branch;
cpu->branch = 0;
cpu->branch_taken = 0;
if (cpu->saved_pc & 3) {
psx_cpu_exception(cpu, CAUSE_ADEL);
}
cpu->opcode = psx_bus_read32(cpu->bus, cpu->pc);
cpu->pc = cpu->next_pc;
cpu->next_pc += 4;
if (psx_cpu_check_irq(cpu)) {
psx_cpu_exception(cpu, CAUSE_INT);
return;
}
g_psx_cpu_primary_table[OP](cpu);
cpu->last_cycles = 2;
cpu->total_cycles += cpu->last_cycles;
cpu->r[0] = 0;
}
int psx_cpu_check_irq(psx_cpu_t* cpu) {
return (cpu->cop0_r[COP0_SR] & SR_IEC) && (cpu->cop0_r[COP0_SR] & cpu->cop0_r[COP0_CAUSE] & 0x00000700);
}
void psx_cpu_exception(psx_cpu_t* cpu, uint32_t cause) {
cpu->cop0_r[COP0_CAUSE] &= 0x0000ff00;
// Set excode and clear 3 LSBs
cpu->cop0_r[COP0_CAUSE] &= 0xffffff80;
cpu->cop0_r[COP0_CAUSE] |= cause;
cpu->cop0_r[COP0_EPC] = cpu->saved_pc;
if (cpu->delay_slot) {
cpu->cop0_r[COP0_EPC] -= 4;
cpu->cop0_r[COP0_CAUSE] |= 0x80000000;
}
if ((cause == CAUSE_INT) && (cpu->cop0_r[COP0_EPC] & 0xfe000000) == 0x4a000000) {
cpu->cop0_r[COP0_EPC] += 4;
}
// Do exception stack push
uint32_t mode = cpu->cop0_r[COP0_SR] & 0x3f;
cpu->cop0_r[COP0_SR] &= 0xffffffc0;
cpu->cop0_r[COP0_SR] |= (mode << 2) & 0x3f;
// Set PC to the vector selected on BEV
cpu->pc = (cpu->cop0_r[COP0_SR] & SR_BEV) ? 0xbfc00180 : 0x80000080;
cpu->next_pc = cpu->pc + 4;
}
void psx_cpu_set_irq_pending(psx_cpu_t* cpu) {
cpu->cop0_r[COP0_CAUSE] |= SR_IM2;
}
void psx_cpu_i_invalid(psx_cpu_t* cpu) {
log_fatal("%08x: Illegal instruction %08x", cpu->pc - 8, cpu->opcode);
psx_cpu_exception(cpu, CAUSE_RI);
}
// Primary
void psx_cpu_i_special(psx_cpu_t* cpu) {
g_psx_cpu_secondary_table[SOP](cpu);
}
void psx_cpu_i_bxx(psx_cpu_t* cpu) {
cpu->branch = 1;
cpu->branch_taken = 0;
g_psx_cpu_bxx_table[T](cpu);
}
// BXX
void psx_cpu_i_bltz(psx_cpu_t* cpu) {
TRACE_B("bltz");
int32_t s = (int32_t)cpu->r[S];
DO_PENDING_LOAD;
if ((int32_t)s < (int32_t)0) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_bgez(psx_cpu_t* cpu) {
TRACE_B("bgez");
int32_t s = (int32_t)cpu->r[S];
DO_PENDING_LOAD;
if ((int32_t)s >= (int32_t)0) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_bltzal(psx_cpu_t* cpu) {
TRACE_B("bltzal");
int32_t s = (int32_t)cpu->r[S];
DO_PENDING_LOAD;
R_RA = cpu->next_pc;
if ((int32_t)s < (int32_t)0) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_bgezal(psx_cpu_t* cpu) {
TRACE_B("bgezal");
int32_t s = (int32_t)cpu->r[S];
DO_PENDING_LOAD;
R_RA = cpu->next_pc;
if ((int32_t)s >= (int32_t)0) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_j(psx_cpu_t* cpu) {
cpu->branch = 1;
TRACE_I26("j");
DO_PENDING_LOAD;
cpu->next_pc = (cpu->next_pc & 0xf0000000) | (IMM26 << 2);
}
void psx_cpu_i_jal(psx_cpu_t* cpu) {
cpu->branch = 1;
TRACE_I26("jal");
DO_PENDING_LOAD;
R_RA = cpu->next_pc;
cpu->next_pc = (cpu->next_pc & 0xf0000000) | (IMM26 << 2);
}
void psx_cpu_i_beq(psx_cpu_t* cpu) {
cpu->branch = 1;
cpu->branch_taken = 0;
TRACE_B("beq");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
if (s == t) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_bne(psx_cpu_t* cpu) {
cpu->branch = 1;
cpu->branch_taken = 0;
TRACE_B("bne");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
if (s != t) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_blez(psx_cpu_t* cpu) {
cpu->branch = 1;
cpu->branch_taken = 0;
TRACE_B("blez");
int32_t s = (int32_t)cpu->r[S];
DO_PENDING_LOAD;
if ((int32_t)s <= (int32_t)0) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_bgtz(psx_cpu_t* cpu) {
cpu->branch = 1;
cpu->branch_taken = 0;
TRACE_B("bgtz");
int32_t s = (int32_t)cpu->r[S];
DO_PENDING_LOAD;
if ((int32_t)s > (int32_t)0) {
BRANCH(IMM16S << 2);
}
}
void psx_cpu_i_addi(psx_cpu_t* cpu) {
TRACE_I16D("addi");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
uint32_t i = IMM16S;
uint32_t r = s + i;
uint32_t o = (s ^ r) & (i ^ r);
if (o & 0x80000000) {
psx_cpu_exception(cpu, CAUSE_OV);
} else {
cpu->r[T] = r;
}
}
void psx_cpu_i_addiu(psx_cpu_t* cpu) {
TRACE_I16D("addiu");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->r[T] = s + IMM16S;
}
void psx_cpu_i_slti(psx_cpu_t* cpu) {
TRACE_I16D("slti");
int32_t s = (int32_t)cpu->r[S];
DO_PENDING_LOAD;
cpu->r[T] = s < IMM16S;
}
void psx_cpu_i_sltiu(psx_cpu_t* cpu) {
TRACE_I16D("sltiu");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->r[T] = s < IMM16S;
}
void psx_cpu_i_andi(psx_cpu_t* cpu) {
TRACE_I16D("andi");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->r[T] = s & IMM16;
}
void psx_cpu_i_ori(psx_cpu_t* cpu) {
TRACE_I16D("ori");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->r[T] = s | IMM16;
}
void psx_cpu_i_xori(psx_cpu_t* cpu) {
TRACE_I16D("xori");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->r[T] = s ^ IMM16;
}
void psx_cpu_i_lui(psx_cpu_t* cpu) {
TRACE_I16S("lui");
DO_PENDING_LOAD;
cpu->r[T] = IMM16 << 16;
}
void psx_cpu_i_cop0(psx_cpu_t* cpu) {
g_psx_cpu_cop0_table[S](cpu);
}
void psx_cpu_i_cop1(psx_cpu_t* cpu) {
DO_PENDING_LOAD;
psx_cpu_exception(cpu, CAUSE_CPU);
}
void psx_cpu_i_cop2(psx_cpu_t* cpu) {
cpu->cop2_flag = 0;
g_psx_cpu_cop2_table[S](cpu);
}
void psx_cpu_i_cop3(psx_cpu_t* cpu) {
DO_PENDING_LOAD;
psx_cpu_exception(cpu, CAUSE_CPU);
}
void psx_cpu_i_lb(psx_cpu_t* cpu) {
TRACE_M("lb");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->load_d = T;
cpu->load_v = SE8(psx_bus_read8(cpu->bus, s + IMM16S));
}
void psx_cpu_i_lh(psx_cpu_t* cpu) {
TRACE_M("lh");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
uint32_t addr = s + IMM16S;
if (addr & 0x1) {
psx_cpu_exception(cpu, CAUSE_ADEL);
} else {
cpu->load_d = T;
cpu->load_v = SE16(psx_bus_read16(cpu->bus, addr));
}
}
void psx_cpu_i_lwl(psx_cpu_t* cpu) {
TRACE_M("lwl");
uint32_t addr = cpu->r[S] + IMM16S;
uint32_t aligned = psx_bus_read32(cpu->bus, addr & ~0x3);
cpu->load_v = cpu->r[T];
switch (addr & 0x3) {
case 0: cpu->load_v = (cpu->load_v & 0x00ffffff) | (aligned << 24); break;
case 1: cpu->load_v = (cpu->load_v & 0x0000ffff) | (aligned << 16); break;
case 2: cpu->load_v = (cpu->load_v & 0x000000ff) | (aligned << 8 ); break;
case 3: cpu->load_v = aligned ; break;
}
cpu->load_d = T;
}
void psx_cpu_i_lw(psx_cpu_t* cpu) {
TRACE_M("lw");
uint32_t s = cpu->r[S];
uint32_t addr = s + IMM16S;
DO_PENDING_LOAD;
if (addr & 0x3) {
psx_cpu_exception(cpu, CAUSE_ADEL);
} else {
cpu->load_d = T;
cpu->load_v = psx_bus_read32(cpu->bus, addr);
}
}
void psx_cpu_i_lbu(psx_cpu_t* cpu) {
TRACE_M("lbu");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->load_d = T;
cpu->load_v = psx_bus_read8(cpu->bus, s + IMM16S);
}
void psx_cpu_i_lhu(psx_cpu_t* cpu) {
TRACE_M("lhu");
uint32_t s = cpu->r[S];
uint32_t addr = s + IMM16S;
DO_PENDING_LOAD;
if (addr & 0x1) {
psx_cpu_exception(cpu, CAUSE_ADEL);
} else {
cpu->load_d = T;
cpu->load_v = psx_bus_read16(cpu->bus, addr);
}
}
void psx_cpu_i_lwr(psx_cpu_t* cpu) {
TRACE_M("lwr");
uint32_t addr = cpu->r[S] + IMM16S;
uint32_t aligned = psx_bus_read32(cpu->bus, addr & ~0x3);
cpu->load_v = cpu->r[T];
switch (addr & 0x3) {
case 0: cpu->load_v = aligned ; break;
case 1: cpu->load_v = (cpu->load_v & 0xff000000) | (aligned >> 8 ); break;
case 2: cpu->load_v = (cpu->load_v & 0xffff0000) | (aligned >> 16); break;
case 3: cpu->load_v = (cpu->load_v & 0xffffff00) | (aligned >> 24); break;
}
cpu->load_d = T;
}
void psx_cpu_i_sb(psx_cpu_t* cpu) {
TRACE_M("sb");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
// Cache isolated
if (cpu->cop0_r[COP0_SR] & SR_ISC) {
log_debug("Ignoring write while cache is isolated");
return;
}
psx_bus_write8(cpu->bus, s + IMM16S, t);
}
void psx_cpu_i_sh(psx_cpu_t* cpu) {
TRACE_M("sh");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
uint32_t addr = s + IMM16S;
DO_PENDING_LOAD;
// Cache isolated
if (cpu->cop0_r[COP0_SR] & SR_ISC) {
log_debug("Ignoring write while cache is isolated");
return;
}
if (addr & 0x1) {
psx_cpu_exception(cpu, CAUSE_ADES);
} else {
psx_bus_write16(cpu->bus, addr, t);
}
}
void psx_cpu_i_swl(psx_cpu_t* cpu) {
TRACE_M("swl");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
uint32_t addr = s + IMM16S;
uint32_t aligned = addr & ~0x3;
uint32_t v = psx_bus_read32(cpu->bus, aligned);
switch (addr & 0x3) {
case 0: v = (v & 0xffffff00) | (cpu->r[T] >> 24); break;
case 1: v = (v & 0xffff0000) | (cpu->r[T] >> 16); break;
case 2: v = (v & 0xff000000) | (cpu->r[T] >> 8 ); break;
case 3: v = cpu->r[T] ; break;
}
psx_bus_write32(cpu->bus, aligned, v);
}
void psx_cpu_i_sw(psx_cpu_t* cpu) {
TRACE_M("sw");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
uint32_t addr = s + IMM16S;
DO_PENDING_LOAD;
// Cache isolated
if (cpu->cop0_r[COP0_SR] & SR_ISC) {
log_debug("Ignoring write while cache is isolated");
return;
}
if (addr & 0x3) {
psx_cpu_exception(cpu, CAUSE_ADES);
} else {
psx_bus_write32(cpu->bus, addr, t);
}
}
void psx_cpu_i_swr(psx_cpu_t* cpu) {
TRACE_M("swr");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
uint32_t addr = s + IMM16S;
uint32_t aligned = addr & ~0x3;
uint32_t v = psx_bus_read32(cpu->bus, aligned);
switch (addr & 0x3) {
case 0: v = cpu->r[T] ; break;
case 1: v = (v & 0x000000ff) | (cpu->r[T] << 8 ); break;
case 2: v = (v & 0x0000ffff) | (cpu->r[T] << 16); break;
case 3: v = (v & 0x00ffffff) | (cpu->r[T] << 24); break;
}
psx_bus_write32(cpu->bus, aligned, v);
}
void psx_cpu_i_lwc0(psx_cpu_t* cpu) {
psx_cpu_exception(cpu, CAUSE_CPU);
}
void psx_cpu_i_lwc1(psx_cpu_t* cpu) {
psx_cpu_exception(cpu, CAUSE_CPU);
}
void psx_cpu_i_lwc2(psx_cpu_t* cpu) {
uint32_t s = cpu->r[S];
uint32_t addr = s + IMM16S;
DO_PENDING_LOAD;
if (addr & 0x3) {
psx_cpu_exception(cpu, CAUSE_ADEL);
} else {
COP2_DR(T) = psx_bus_read32(cpu->bus, addr);
}
}
void psx_cpu_i_lwc3(psx_cpu_t* cpu) {
psx_cpu_exception(cpu, CAUSE_CPU);
}
void psx_cpu_i_swc0(psx_cpu_t* cpu) {
psx_cpu_exception(cpu, CAUSE_CPU);
}
void psx_cpu_i_swc1(psx_cpu_t* cpu) {
psx_cpu_exception(cpu, CAUSE_CPU);
}
void psx_cpu_i_swc2(psx_cpu_t* cpu) {
uint32_t s = cpu->r[S];
uint32_t addr = s + IMM16S;
DO_PENDING_LOAD;
// Cache isolated
if (cpu->cop0_r[COP0_SR] & SR_ISC) {
log_debug("Ignoring write while cache is isolated");
return;
}
if (addr & 0x3) {
psx_cpu_exception(cpu, CAUSE_ADES);
} else {
psx_bus_write32(cpu->bus, addr, COP2_DR(T));
}
}
void psx_cpu_i_swc3(psx_cpu_t* cpu) {
psx_cpu_exception(cpu, CAUSE_CPU);
}
// Secondary
void psx_cpu_i_sll(psx_cpu_t* cpu) {
TRACE_I5D("sll");
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = t << IMM5;
}
void psx_cpu_i_srl(psx_cpu_t* cpu) {
TRACE_I5D("srl");
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = t >> IMM5;
}
void psx_cpu_i_sra(psx_cpu_t* cpu) {
TRACE_I5D("sra");
int32_t t = (int32_t)cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = t >> IMM5;
}
void psx_cpu_i_sllv(psx_cpu_t* cpu) {
TRACE_RT("sllv");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = t << (s & 0x1f);
}
void psx_cpu_i_srlv(psx_cpu_t* cpu) {
TRACE_RT("srlv");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = t >> (s & 0x1f);
}
void psx_cpu_i_srav(psx_cpu_t* cpu) {
TRACE_RT("srav");
uint32_t s = cpu->r[S];
int32_t t = (int32_t)cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = t >> (s & 0x1f);
}
void psx_cpu_i_jr(psx_cpu_t* cpu) {
cpu->branch = 1;
TRACE_RS("jr");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->next_pc = s;
}
void psx_cpu_i_jalr(psx_cpu_t* cpu) {
cpu->branch = 1;
TRACE_RD("jalr");
uint32_t s = cpu->r[S];
DO_PENDING_LOAD;
cpu->r[D] = cpu->next_pc;
cpu->next_pc = s;
}
void psx_cpu_i_syscall(psx_cpu_t* cpu) {
TRACE_I20("syscall");
DO_PENDING_LOAD;
psx_cpu_exception(cpu, CAUSE_SYSCALL);
}
void psx_cpu_i_break(psx_cpu_t* cpu) {
TRACE_I20("break");
DO_PENDING_LOAD;
psx_cpu_exception(cpu, CAUSE_BP);
}
void psx_cpu_i_mfhi(psx_cpu_t* cpu) {
TRACE_MTF("mfhi");
DO_PENDING_LOAD;
cpu->r[D] = cpu->hi;
}
void psx_cpu_i_mthi(psx_cpu_t* cpu) {
TRACE_MTF("mthi");
DO_PENDING_LOAD;
cpu->hi = cpu->r[S];
}
void psx_cpu_i_mflo(psx_cpu_t* cpu) {
TRACE_MTF("mflo");
DO_PENDING_LOAD;
cpu->r[D] = cpu->lo;
}
void psx_cpu_i_mtlo(psx_cpu_t* cpu) {
TRACE_MTF("mtlo");
DO_PENDING_LOAD;
cpu->lo = cpu->r[S];
}
void psx_cpu_i_mult(psx_cpu_t* cpu) {
TRACE_MD("mult");
int64_t s = (int64_t)((int32_t)cpu->r[S]);
int64_t t = (int64_t)((int32_t)cpu->r[T]);
DO_PENDING_LOAD;
uint64_t r = s * t;
cpu->hi = r >> 32;
cpu->lo = r & 0xffffffff;
}
void psx_cpu_i_multu(psx_cpu_t* cpu) {
TRACE_MD("multu");
uint64_t s = (uint64_t)cpu->r[S];
uint64_t t = (uint64_t)cpu->r[T];
DO_PENDING_LOAD;
uint64_t r = s * t;
cpu->hi = r >> 32;
cpu->lo = r & 0xffffffff;
}
void psx_cpu_i_div(psx_cpu_t* cpu) {
TRACE_MD("div");
int32_t s = (int32_t)cpu->r[S];
int32_t t = (int32_t)cpu->r[T];
DO_PENDING_LOAD;
if (!t) {
cpu->hi = s;
cpu->lo = (s >= 0) ? 0xffffffff : 1;
} else if ((((uint32_t)s) == 0x80000000) && (t == -1)) {
cpu->hi = 0;
cpu->lo = 0x80000000;
} else {
cpu->hi = (uint32_t)(s % t);
cpu->lo = (uint32_t)(s / t);
}
}
void psx_cpu_i_divu(psx_cpu_t* cpu) {
TRACE_MD("divu");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
if (!t) {
cpu->hi = s;
cpu->lo = 0xffffffff;
} else {
cpu->hi = s % t;
cpu->lo = s / t;
}
}
void psx_cpu_i_add(psx_cpu_t* cpu) {
TRACE_RT("add");
int32_t s = cpu->r[S];
int32_t t = cpu->r[T];
DO_PENDING_LOAD;
int32_t r = s + t;
uint32_t o = (s ^ r) & (t ^ r);
if (o & 0x80000000) {
psx_cpu_exception(cpu, CAUSE_OV);
} else {
cpu->r[D] = (uint32_t)r;
}
}
void psx_cpu_i_addu(psx_cpu_t* cpu) {
TRACE_RT("addu");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = s + t;
}
void psx_cpu_i_sub(psx_cpu_t* cpu) {
TRACE_RT("sub");
int32_t s = (int32_t)cpu->r[S];
int32_t t = (int32_t)cpu->r[T];
int32_t r;
DO_PENDING_LOAD;
int o = __builtin_ssub_overflow(s, t, &r);
if (o) {
psx_cpu_exception(cpu, CAUSE_OV);
} else {
cpu->r[D] = r;
}
}
void psx_cpu_i_subu(psx_cpu_t* cpu) {
TRACE_RT("subu");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = s - t;
}
void psx_cpu_i_and(psx_cpu_t* cpu) {
TRACE_RT("and");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = s & t;
}
void psx_cpu_i_or(psx_cpu_t* cpu) {
TRACE_RT("or");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = s | t;
}
void psx_cpu_i_xor(psx_cpu_t* cpu) {
TRACE_RT("xor");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = (s ^ t);
}
void psx_cpu_i_nor(psx_cpu_t* cpu) {
TRACE_RT("nor");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = ~(s | t);
}
void psx_cpu_i_slt(psx_cpu_t* cpu) {
TRACE_RT("slt");
int32_t s = (int32_t)cpu->r[S];
int32_t t = (int32_t)cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = s < t;
}
void psx_cpu_i_sltu(psx_cpu_t* cpu) {
TRACE_RT("sltu");
uint32_t s = cpu->r[S];
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->r[D] = s < t;
}
// COP0
void psx_cpu_i_mfc0(psx_cpu_t* cpu) {
TRACE_C0M("mfc0");
DO_PENDING_LOAD;
cpu->load_v = cpu->cop0_r[D];
cpu->load_d = T;
}
void psx_cpu_i_mtc0(psx_cpu_t* cpu) {
TRACE_C0M("mtc0");
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
cpu->cop0_r[D] = t & g_psx_cpu_cop0_write_mask_table[D];
}
void psx_cpu_i_rfe(psx_cpu_t* cpu) {
TRACE_N("rfe");
DO_PENDING_LOAD;
uint32_t mode = cpu->cop0_r[COP0_SR] & 0x3f;
cpu->cop0_r[COP0_SR] &= 0xfffffff0;
cpu->cop0_r[COP0_SR] |= mode >> 2;
}
// COP2
void psx_cpu_i_mfc2(psx_cpu_t* cpu) {
TRACE_C2M("mfc2");
DO_PENDING_LOAD;
cpu->load_v = ((uint32_t*)(&cpu->cop2_dr))[D];
cpu->load_d = T;
}
void psx_cpu_i_cfc2(psx_cpu_t* cpu) {
TRACE_C2MC("cfc2");
DO_PENDING_LOAD;
cpu->load_v = ((uint32_t*)(&cpu->cop2_cr))[D];
cpu->load_d = T;
}
void psx_cpu_i_mtc2(psx_cpu_t* cpu) {
TRACE_C2M("mtc2");
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
((uint32_t*)(&cpu->cop2_dr))[D] = t;
}
void psx_cpu_i_ctc2(psx_cpu_t* cpu) {
TRACE_C2MC("ctc2");
uint32_t t = cpu->r[T];
DO_PENDING_LOAD;
((uint32_t*)(&cpu->cop2_cr))[D] = t;
}
#define R_IR0 cpu->cop2_dr.ir0
#define R_IR1 cpu->cop2_dr.ir1
#define R_IR2 cpu->cop2_dr.ir2
#define R_IR3 cpu->cop2_dr.ir3
#define R_MAC0 cpu->cop2_dr.mac0
#define R_MAC1 cpu->cop2_dr.mac1
#define R_MAC2 cpu->cop2_dr.mac2
#define R_MAC3 cpu->cop2_dr.mac3
#define R_RT11 cpu->cop2_cr.rt[0]
#define R_RT12 cpu->cop2_cr.rt[1]
#define R_RT13 cpu->cop2_cr.rt[2]
#define R_RT21 cpu->cop2_cr.rt[3]
#define R_RT22 cpu->cop2_cr.rt[4]
#define R_RT23 cpu->cop2_cr.rt[5]
#define R_RT31 cpu->cop2_cr.rt[6]
#define R_RT32 cpu->cop2_cr.rt[7]
#define R_RT33 cpu->cop2_cr.rt[8]
#define R_VX0 cpu->cop2_dr.v0[0]
#define R_VY0 cpu->cop2_dr.v0[1]
#define R_VZ0 cpu->cop2_dr.v0[2]
#define R_VX1 cpu->cop2_dr.v1[0]
#define R_VY1 cpu->cop2_dr.v1[1]
#define R_VZ1 cpu->cop2_dr.v1[2]
#define R_VX2 cpu->cop2_dr.v2[0]
#define R_VY2 cpu->cop2_dr.v2[1]
#define R_VZ2 cpu->cop2_dr.v2[2]
#define R_TRX cpu->cop2_cr.trx
#define R_TRY cpu->cop2_cr.try
#define R_TRZ cpu->cop2_cr.trz
#define R_SZ3 cpu->cop2_dr.sz3
#define R_SX0 cpu->cop2_dr.sxy0[0]
#define R_SY0 cpu->cop2_dr.sxy0[1]
#define R_SX1 cpu->cop2_dr.sxy1[0]
#define R_SY1 cpu->cop2_dr.sxy1[1]
#define R_SX2 cpu->cop2_dr.sxy2[0]
#define R_SY2 cpu->cop2_dr.sxy2[1]
#define R_SZ0 cpu->cop2_dr.sz0
#define R_SZ1 cpu->cop2_dr.sz1
#define R_SZ2 cpu->cop2_dr.sz2
#define R_SZ3 cpu->cop2_dr.sz3
#define R_ZSF3 cpu->cop2_cr.zsf3
#define R_ZSF4 cpu->cop2_cr.zsf4
#define R_OFX cpu->cop2_cr.ofx
#define R_OFY cpu->cop2_cr.ofy
#define R_OTZ cpu->cop2_dr.otz
#define R_H cpu->cop2_cr.h
#define R_DQA cpu->cop2_cr.dqa
#define R_DQB cpu->cop2_cr.dqb
#define CLAMPU32(v, min, max) ((uint32_t)v < (uint32_t)min ? min : ((uint32_t)v > (uint32_t)max ? max : (uint32_t)v))
#define CLAMPS32(v, min, max) ((int32_t)v < (int32_t)min ? min : ((int32_t)v > (int32_t)max ? max : (int32_t)v))
#define CLAMPS16(v, min, max) ((int16_t)v < (int16_t)min ? min : ((int16_t)v > (int16_t)max ? max : (int16_t)v))
void psx_cpu_i_gte(psx_cpu_t* cpu) {
DO_PENDING_LOAD;
// g_psx_gte_table[cpu->opcode & 0x3f](cpu);
}
void psx_gte_i_invalid(psx_cpu_t* cpu) {
log_fatal("invalid: Unimplemented GTE instruction %02x, %02x", cpu->opcode & 0x3f, cpu->opcode >> 25);
}
static const int16_t g_psx_gte_ir_clamp_table[] = {
-0x8000, 0x7fff, 0x0000, 0x7fff
};
void psx_gte_i_rtps(psx_cpu_t* cpu) {
int sf = (cpu->opcode >> 19) & 1;
int lm = (cpu->opcode >> 9) & 2;
int shift = 12 * sf;
int16_t ir_upper = g_psx_gte_ir_clamp_table[lm];
int16_t ir_lower = g_psx_gte_ir_clamp_table[lm + 1];
R_MAC1 = (R_TRX << 12) + (R_RT11 * R_VX0 + R_RT12 * R_VY0 + R_RT13 * R_VZ0);
R_MAC2 = (R_TRY << 12) + (R_RT21 * R_VX0 + R_RT22 * R_VY0 + R_RT23 * R_VZ0);
R_MAC3 = (R_TRZ << 12) + (R_RT31 * R_VX0 + R_RT32 * R_VY0 + R_RT33 * R_VZ0);
R_IR1 = CLAMPS16(R_MAC1 >> shift, ir_lower, ir_upper);
R_IR2 = CLAMPS16(R_MAC2 >> shift, ir_lower, ir_upper);
R_IR3 = CLAMPS16(R_MAC3 >> shift, ir_lower, ir_upper);
R_SZ0 = R_SZ1;
R_SZ1 = R_SZ2;
R_SZ2 = R_SZ3;
R_SZ3 = CLAMPU32(R_MAC3 >> (12 * !sf), 0x0000, 0xffff);
uint32_t f = R_H / R_SZ3;
R_SX0 = R_SX1;
R_SX1 = R_SX2;
R_SX2 = R_OFX + R_IR1 * f;
R_SY0 = R_SY1;
R_SY1 = R_SY2;
R_SY2 = R_OFY + R_IR2 * f;
R_IR0 = R_DQB + R_DQA * f;
R_MAC0 = R_IR0;
}
void psx_gte_i_nclip(psx_cpu_t* cpu) {
R_MAC0 = R_SX0 * (R_SY1 - R_SY2) + R_SX1 * (R_SY2 - R_SY0) + R_SX2 * (R_SY0 - R_SY1);
}
void psx_gte_i_op(psx_cpu_t* cpu) {
log_fatal("op: Unimplemented GTE instruction");
}
void psx_gte_i_dpcs(psx_cpu_t* cpu) {
log_fatal("dpcs: Unimplemented GTE instruction");
}
void psx_gte_i_intpl(psx_cpu_t* cpu) {
log_fatal("intpl: Unimplemented GTE instruction");
}
void psx_gte_i_mvmva(psx_cpu_t* cpu) {
log_fatal("mvmva: Unimplemented GTE instruction");
}
void psx_gte_i_ncds(psx_cpu_t* cpu) {
// log_fatal("ncds: Unimplemented GTE instruction");
}
void psx_gte_i_cdp(psx_cpu_t* cpu) {
log_fatal("cdp: Unimplemented GTE instruction");
}
void psx_gte_i_ncdt(psx_cpu_t* cpu) {
log_fatal("ncdt: Unimplemented GTE instruction");
}
void psx_gte_i_nccs(psx_cpu_t* cpu) {
log_fatal("nccs: Unimplemented GTE instruction");
}
void psx_gte_i_cc(psx_cpu_t* cpu) {
log_fatal("cc: Unimplemented GTE instruction");
}
void psx_gte_i_ncs(psx_cpu_t* cpu) {
log_fatal("ncs: Unimplemented GTE instruction");
}
void psx_gte_i_nct(psx_cpu_t* cpu) {
log_fatal("nct: Unimplemented GTE instruction");
}
void psx_gte_i_sqr(psx_cpu_t* cpu) {
log_fatal("sqr: Unimplemented GTE instruction");
}
void psx_gte_i_dcpl(psx_cpu_t* cpu) {
log_fatal("dcpl: Unimplemented GTE instruction");
}
void psx_gte_i_dpct(psx_cpu_t* cpu) {
log_fatal("dpct: Unimplemented GTE instruction");
}
void psx_gte_i_avsz3(psx_cpu_t* cpu) {
R_MAC0 = R_ZSF3 * (R_SZ1 + R_SZ2 + R_SZ3);
uint32_t mac0 = R_MAC0 >> 12;
R_OTZ = CLAMPU32(mac0, 0x0000, 0xffff);
}
void psx_gte_i_avsz4(psx_cpu_t* cpu) {
R_MAC0 = R_ZSF4 * (R_SZ0 + R_SZ1 + R_SZ2 + R_SZ3);
uint32_t mac0 = R_MAC0 >> 12;
R_OTZ = CLAMPU32(mac0, 0x0000, 0xffff);
}
void psx_gte_i_rtpt(psx_cpu_t* cpu) {
int sf = (cpu->opcode >> 19) & 1;
int lm = (cpu->opcode >> 9) & 2;
int shift = 12 * sf;
int16_t ir_upper = g_psx_gte_ir_clamp_table[lm];
int16_t ir_lower = g_psx_gte_ir_clamp_table[lm + 1];
R_MAC1 = (R_TRX << 12) + (R_RT11 * R_VX0 + R_RT12 * R_VY0 + R_RT13 * R_VZ0);
R_MAC2 = (R_TRY << 12) + (R_RT21 * R_VX0 + R_RT22 * R_VY0 + R_RT23 * R_VZ0);
R_MAC3 = (R_TRZ << 12) + (R_RT31 * R_VX0 + R_RT32 * R_VY0 + R_RT33 * R_VZ0);
R_IR1 = CLAMPS16(R_MAC1 >> shift, ir_lower, ir_upper);
R_IR2 = CLAMPS16(R_MAC2 >> shift, ir_lower, ir_upper);
R_IR3 = CLAMPS16(R_MAC3 >> shift, ir_lower, ir_upper);
R_SZ0 = R_SZ1;
R_SZ1 = R_SZ2;
R_SZ2 = R_SZ3;
R_SZ3 = CLAMPU32(R_MAC3 >> (12 * !sf), 0x0000, 0xffff);
uint32_t f = R_H / R_SZ3;
R_SX0 = R_SX1;
R_SX1 = R_SX2;
R_SX2 = R_OFX + R_IR1 * f;
R_SY0 = R_SY1;
R_SY1 = R_SY2;
R_SY2 = R_OFY + R_IR2 * f;
R_IR0 = R_DQB + R_DQA * f;
R_MAC0 = R_IR0;
}
void psx_gte_i_gpf(psx_cpu_t* cpu) {
log_fatal("gpf: Unimplemented GTE instruction");
}
void psx_gte_i_gpl(psx_cpu_t* cpu) {
log_fatal("gpl: Unimplemented GTE instruction");
}
void psx_gte_i_ncct(psx_cpu_t* cpu) {
log_fatal("ncct: Unimplemented GTE instruction");
}
#undef R_R0
#undef R_A0
#undef R_RA
#undef OP
#undef S
#undef T
#undef D
#undef IMM5
#undef CMT
#undef SOP
#undef IMM26
#undef IMM16
#undef IMM16S
#undef TRACE_M
#undef TRACE_I16S
#undef TRACE_I16D
#undef TRACE_I5D
#undef TRACE_I26
#undef TRACE_RT
#undef TRACE_C0M
#undef TRACE_C2M
#undef TRACE_C2MC
#undef TRACE_B
#undef TRACE_RS
#undef TRACE_MTF
#undef TRACE_RD
#undef TRACE_MD
#undef TRACE_I20
#undef TRACE_N
#undef DO_PENDING_LOAD
#undef DEBUG_ALL
#undef SE8
#undef SE16
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