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#include <stdint.h>
#include <stdio.h>
#include "jagcpu.h"
char *gpu_mnemonics[] = {
"add",
"addc",
"addq",
"addqt",
"sub",
"subc",
"subq",
"subqt",
"neg",
"and",
"or",
"xor",
"not",
"btst",
"bset",
"bclr",
"mult",
"imult",
"imultn",
"resmac",
"imacn",
"div",
"abs",
"sh",
"shlq",
"shrq",
"sha",
"sharq",
"ror",
"rorq",
"cmp",
"cmpq",
"sat8",
"sat16",
"move",
"moveq",
"moveta",
"movefa",
"movei",
"loadb",
"loadw",
"load",
"loadp",
"load", //r14 relative
"load", //r15 relative
"storeb",
"storew",
"store",
"storep",
"store", //r14 relative
"store", //r15 relative
"move", //PC
"jump",
"jr",
"mmult",
"mtoi",
"normi",
"nop",
"load", //r14 indexed
"load", //r15 indexed
"store", //r14 indexed
"store", //r15 indexed
"sat24",
"pack",
"unpack"
};
char *dsp_mnemonics[DSP_ADDQMOD+1] = {
[DSP_SUBQMOD] = "subqmod",
[DSP_SAT16S] = "sat16s",
[DSP_SAT32S] = "sat32s",
[DSP_MIRROR] = "mirror",
[DSP_ADDQMOD] = "addqmod"
};
void init_dsp_mnemonic_table()
{
static uint8_t init_done;
if (init_done) {
return;
}
for (int i = 0; i < DSP_ADDQMOD; i++)
{
if (!dsp_mnemonics[i]) {
dsp_mnemonics[i] = gpu_mnemonics[i];
}
}
init_done = 1;
}
uint16_t jag_opcode(uint16_t inst, uint8_t is_gpu)
{
uint16_t opcode = inst >> 10;
if (is_gpu && opcode == GPU_PACK && (inst & 0x20)) {
return GPU_UNPACK;
}
return opcode;
}
uint16_t jag_reg2(uint16_t inst)
{
return inst & 0x1F;
}
uint16_t jag_reg1(uint16_t inst)
{
return inst >> 5 & 0x1F;
}
//moveq and bit instructions should just use jag_reg1 instead
uint32_t jag_quick(uint16_t inst)
{
uint32_t val = inst >> 5 & 0x1F;
return val ? val : 32;
}
uint8_t is_quick_1_32_opcode(uint16_t opcode, uint8_t is_gpu)
{
return opcode == JAG_ADDQ
|| opcode == JAG_ADDQT
|| opcode == JAG_SUBQ
|| opcode == JAG_SUBQT
|| opcode == JAG_SHLQ
|| opcode == JAG_SHRQ
|| opcode == JAG_SHARQ
|| opcode == JAG_RORQ
|| (!is_gpu && (
opcode == DSP_SUBQMOD
|| opcode == DSP_ADDQMOD
));
}
uint8_t is_quick_0_31_opcode(uint16_t opcode)
{
return opcode == JAG_MOVEQ
|| opcode == JAG_BTST
|| opcode == JAG_BSET
|| opcode == JAG_BCLR;
}
uint8_t is_load(uint16_t opcode, uint8_t is_gpu)
{
return opcode == JAG_LOAD
|| opcode == JAG_LOADB
|| opcode == JAG_LOADW
|| (is_gpu && opcode == GPU_LOADP);
}
uint8_t is_store(uint16_t opcode, uint8_t is_gpu)
{
return opcode == JAG_STORE
|| opcode == JAG_STOREB
|| opcode == JAG_STOREW
|| (is_gpu && opcode == GPU_STOREP);
}
uint8_t is_single_source(uint16_t opcode, uint8_t is_gpu)
{
return opcode == JAG_NEG
|| opcode == JAG_NOT
|| opcode == JAG_ABS
|| opcode == GPU_SAT16 //no is_gpu check needed as DSP_SAT16S is also single source
|| (is_gpu && (
opcode == GPU_SAT8
|| opcode == GPU_SAT24
|| opcode == GPU_PACK
|| opcode == GPU_UNPACK
))
|| (!is_gpu && (
opcode == DSP_SAT32S
|| opcode == DSP_MIRROR
));
}
char * jag_cc_names[] = {
"t",
"ne",
"eq",
"f",
"cc",
"hi",
"eq_cc",
"f",
"cs",
"ne_cs",
"eq_cs",
"f",
"f",
"f",
"f",
"f"
"t_alt",
"ne_alt",
"eq_alt",
"f",
"pl",
"ne_pl",
"eq_pl",
"f",
"mi",
"ne_mi",
"eq_mi"
};
char * jag_cc(uint16_t inst)
{
uint16_t ccnum = jag_reg2(inst);
if (ccnum >= sizeof(jag_cc_names)/sizeof(*jag_cc_names)) {
return jag_cc_names[3];
}
return jag_cc_names[ccnum];
}
uint8_t jag_is_alwyas_falsse(uint16_t cond)
{
return (cond & 3) == 3 || (cond && 0xC) == 0xC;
}
uint32_t jag_jr_dest(uint16_t inst, uint32_t address)
{
uint32_t rel = jag_reg1(inst);
if (rel & 0x10) {
rel |= 0xFFFFFFE0;
}
return address + 2 + rel*2;
}
int jag_cpu_disasm(uint16_t **stream, uint32_t address, char *dst, uint8_t is_gpu, uint8_t labels)
{
uint16_t inst = **stream;
(*stream)++;
uint16_t opcode = jag_opcode(inst, is_gpu);
char **mnemonics;
if (is_gpu) {
mnemonics = gpu_mnemonics;
} else {
init_dsp_mnemonic_table();
mnemonics = dsp_mnemonics;
}
switch (opcode)
{
case JAG_MOVEI: {
uint32_t immed = **stream;
(*stream)++;
immed |= **stream << 16;
(*stream)++;
return sprintf(dst, "%s $%X, r%d", mnemonics[opcode], immed, jag_reg2(inst));
}
case JAG_JR:
return sprintf(dst,
labels ? "%s %s, ADR_%X" : "%s %s, $W%X",
mnemonics[opcode], jag_cc(inst), jag_jr_dest(inst, address)
);
case JAG_JUMP:
return sprintf(dst, "%s %s, (r%d)", mnemonics[opcode], jag_cc(inst), jag_reg1(inst));
case JAG_LOAD_R14_REL:
case JAG_LOAD_R15_REL:
return sprintf(dst, "%s (r%d+%d), r%d",
mnemonics[opcode],
opcode == JAG_LOAD_R14_REL ? 14 : 15,
jag_quick(inst),
jag_reg2(inst)
);
break;
case JAG_STORE_R14_REL:
case JAG_STORE_R15_REL:
return sprintf(dst, "%s r%d, (r%d+%d)",
mnemonics[opcode],
jag_reg2(inst),
opcode == JAG_STORE_R14_REL ? 14 : 15,
jag_quick(inst)
);
break;
case JAG_LOAD_R14_INDEXED:
case JAG_LOAD_R15_INDEXED:
return sprintf(dst, "%s (r%d+r%d), r%d",
mnemonics[opcode],
opcode == JAG_LOAD_R14_INDEXED ? 14 : 15,
jag_reg1(inst),
jag_reg2(inst)
);
break;
case JAG_STORE_R14_INDEXED:
case JAG_STORE_R15_INDEXED:
return sprintf(dst, "%s r%d, (r%d+r%d)",
mnemonics[opcode],
jag_reg2(inst),
opcode == JAG_STORE_R14_INDEXED ? 14 : 15,
jag_reg1(inst)
);
break;
default:
if (is_quick_1_32_opcode(opcode, is_gpu)) {
return sprintf(dst, "%s %d, r%d", mnemonics[opcode], jag_quick(inst), jag_reg2(inst));
} else if (is_quick_0_31_opcode(opcode)) {
return sprintf(dst, "%s %d, r%d", mnemonics[opcode], jag_reg1(inst), jag_reg2(inst));
} else if (is_load(opcode, is_gpu)) {
return sprintf(dst, "%s (r%d), r%d", mnemonics[opcode], jag_reg1(inst), jag_reg2(inst));
} else if (is_store(opcode, is_gpu)) {
return sprintf(dst, "%s r%d, (r%d)", mnemonics[opcode], jag_reg2(inst), jag_reg1(inst));
} else {
return sprintf(dst, "%s r%d, r%d", mnemonics[opcode], jag_reg1(inst), jag_reg2(inst));
}
}
}
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