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bsnes/processor/lr35902/instructions.cpp
Tim Allen 4e2eb23835 Update to v093 release. 
byuu says:

Changelog:
- added Cocoa target: higan can now be compiled for OS X Lion
  [Cydrak, byuu]
- SNES/accuracy profile hires color blending improvements - fixes
  Marvelous text [AWJ]
- fixed a slight bug in SNES/SA-1 VBR support caused by a typo
- added support for multi-pass shaders that can load external textures
  (requires OpenGL 3.2+)
- added game library path (used by ananke->Import Game) to
  Settings->Advanced
- system profiles, shaders and cheats database can be stored in "all
  users" shared folders now (eg /usr/share on Linux)
- all configuration files are in BML format now, instead of XML (much
  easier to read and edit this way)
- main window supports drag-and-drop of game folders (but not game files
  / ZIP archives)
- audio buffer clears when entering a modal loop on Windows (prevents
  audio repetition with DirectSound driver)
- a substantial amount of code clean-up (probably the biggest
  refactoring to date)

One highly desired target for this release was to default to the optimal
drivers instead of the safest drivers, but because AMD drivers don't
seem to like my OpenGL 3.2 driver, I've decided to postpone that. AMD
has too big a market share. Hopefully with v093 officially released, we
can get some public input on what AMD doesn't like.
2013-08-18 13:21:14 +10:00

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void LR35902::op_xx() {
}
void LR35902::op_cb() {
exec_cb();
}
//8-bit load commands
template<unsigned x, unsigned y> void LR35902::op_ld_r_r() {
r[x] = r[y];
}
template<unsigned x> void LR35902::op_ld_r_n() {
r[x] = op_read(r[PC]++);
}
template<unsigned x> void LR35902::op_ld_r_hl() {
r[x] = op_read(r[HL]);
}
template<unsigned x> void LR35902::op_ld_hl_r() {
op_write(r[HL], r[x]);
}
void LR35902::op_ld_hl_n() {
op_write(r[HL], op_read(r[PC]++));
}
template<unsigned x> void LR35902::op_ld_a_rr() {
r[A] = op_read(r[x]);
}
void LR35902::op_ld_a_nn() {
uint8 lo = op_read(r[PC]++);
uint8 hi = op_read(r[PC]++);
r[A] = op_read((hi << 8) | (lo << 0));
}
template<unsigned x> void LR35902::op_ld_rr_a() {
op_write(r[x], r[A]);
}
void LR35902::op_ld_nn_a() {
uint8 lo = op_read(r[PC]++);
uint8 hi = op_read(r[PC]++);
op_write((hi << 8) | (lo << 0), r[A]);
}
void LR35902::op_ld_a_ffn() {
r[A] = op_read(0xff00 + op_read(r[PC]++));
}
void LR35902::op_ld_ffn_a() {
op_write(0xff00 + op_read(r[PC]++), r[A]);
}
void LR35902::op_ld_a_ffc() {
r[A] = op_read(0xff00 + r[C]);
}
void LR35902::op_ld_ffc_a() {
op_write(0xff00 + r[C], r[A]);
}
void LR35902::op_ldi_hl_a() {
op_write(r[HL], r[A]);
r[HL]++;
}
void LR35902::op_ldi_a_hl() {
r[A] = op_read(r[HL]);
r[HL]++;
}
void LR35902::op_ldd_hl_a() {
op_write(r[HL], r[A]);
r[HL]--;
}
void LR35902::op_ldd_a_hl() {
r[A] = op_read(r[HL]);
r[HL]--;
}
//16-bit load commands
template<unsigned x> void LR35902::op_ld_rr_nn() {
r[x] = op_read(r[PC]++) << 0;
r[x] |= op_read(r[PC]++) << 8;
}
void LR35902::op_ld_nn_sp() {
uint16 addr = op_read(r[PC]++) << 0;
addr |= op_read(r[PC]++) << 8;
op_write(addr + 0, r[SP] >> 0);
op_write(addr + 1, r[SP] >> 8);
}
void LR35902::op_ld_sp_hl() {
r[SP] = r[HL];
op_io();
}
template<unsigned x> void LR35902::op_push_rr() {
op_write(--r[SP], r[x] >> 8);
op_write(--r[SP], r[x] >> 0);
op_io();
}
template<unsigned x> void LR35902::op_pop_rr() {
r[x] = op_read(r[SP]++) << 0;
r[x] |= op_read(r[SP]++) << 8;
}
//8-bit arithmetic commands
void LR35902::opi_add_a(uint8 x) {
uint16 rh = r[A] + x;
uint16 rl = (r[A] & 0x0f) + (x & 0x0f);
r[A] = rh;
r.f.z = (uint8)rh == 0;
r.f.n = 0;
r.f.h = rl > 0x0f;
r.f.c = rh > 0xff;
}
template<unsigned x> void LR35902::op_add_a_r() { opi_add_a(r[x]); }
void LR35902::op_add_a_n() { opi_add_a(op_read(r[PC]++)); }
void LR35902::op_add_a_hl() { opi_add_a(op_read(r[HL])); }
void LR35902::opi_adc_a(uint8 x) {
uint16 rh = r[A] + x + r.f.c;
uint16 rl = (r[A] & 0x0f) + (x & 0x0f) + r.f.c;
r[A] = rh;
r.f.z = (uint8)rh == 0;
r.f.n = 0;
r.f.h = rl > 0x0f;
r.f.c = rh > 0xff;
}
template<unsigned x> void LR35902::op_adc_a_r() { opi_adc_a(r[x]); }
void LR35902::op_adc_a_n() { opi_adc_a(op_read(r[PC]++)); }
void LR35902::op_adc_a_hl() { opi_adc_a(op_read(r[HL])); }
void LR35902::opi_sub_a(uint8 x) {
uint16 rh = r[A] - x;
uint16 rl = (r[A] & 0x0f) - (x & 0x0f);
r[A] = rh;
r.f.z = (uint8)rh == 0;
r.f.n = 1;
r.f.h = rl > 0x0f;
r.f.c = rh > 0xff;
}
template<unsigned x> void LR35902::op_sub_a_r() { opi_sub_a(r[x]); }
void LR35902::op_sub_a_n() { opi_sub_a(op_read(r[PC]++)); }
void LR35902::op_sub_a_hl() { opi_sub_a(op_read(r[HL])); }
void LR35902::opi_sbc_a(uint8 x) {
uint16 rh = r[A] - x - r.f.c;
uint16 rl = (r[A] & 0x0f) - (x & 0x0f) - r.f.c;
r[A] = rh;
r.f.z = (uint8)rh == 0;
r.f.n = 1;
r.f.h = rl > 0x0f;
r.f.c = rh > 0xff;
}
template<unsigned x> void LR35902::op_sbc_a_r() { opi_sbc_a(r[x]); }
void LR35902::op_sbc_a_n() { opi_sbc_a(op_read(r[PC]++)); }
void LR35902::op_sbc_a_hl() { opi_sbc_a(op_read(r[HL])); }
void LR35902::opi_and_a(uint8 x) {
r[A] &= x;
r.f.z = r[A] == 0;
r.f.n = 0;
r.f.h = 1;
r.f.c = 0;
}
template<unsigned x> void LR35902::op_and_a_r() { opi_and_a(r[x]); }
void LR35902::op_and_a_n() { opi_and_a(op_read(r[PC]++)); }
void LR35902::op_and_a_hl() { opi_and_a(op_read(r[HL])); }
void LR35902::opi_xor_a(uint8 x) {
r[A] ^= x;
r.f.z = r[A] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = 0;
}
template<unsigned x> void LR35902::op_xor_a_r() { opi_xor_a(r[x]); }
void LR35902::op_xor_a_n() { opi_xor_a(op_read(r[PC]++)); }
void LR35902::op_xor_a_hl() { opi_xor_a(op_read(r[HL])); }
void LR35902::opi_or_a(uint8 x) {
r[A] |= x;
r.f.z = r[A] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = 0;
}
template<unsigned x> void LR35902::op_or_a_r() { opi_or_a(r[x]); }
void LR35902::op_or_a_n() { opi_or_a(op_read(r[PC]++)); }
void LR35902::op_or_a_hl() { opi_or_a(op_read(r[HL])); }
void LR35902::opi_cp_a(uint8 x) {
uint16 rh = r[A] - x;
uint16 rl = (r[A] & 0x0f) - (x & 0x0f);
r.f.z = (uint8)rh == 0;
r.f.n = 1;
r.f.h = rl > 0x0f;
r.f.c = rh > 0xff;
}
template<unsigned x> void LR35902::op_cp_a_r() { opi_cp_a(r[x]); }
void LR35902::op_cp_a_n() { opi_cp_a(op_read(r[PC]++)); }
void LR35902::op_cp_a_hl() { opi_cp_a(op_read(r[HL])); }
template<unsigned x> void LR35902::op_inc_r() {
r[x]++;
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = (r[x] & 0x0f) == 0x00;
}
void LR35902::op_inc_hl() {
uint8 n = op_read(r[HL]);
op_write(r[HL], ++n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = (n & 0x0f) == 0x00;
}
template<unsigned x> void LR35902::op_dec_r() {
r[x]--;
r.f.z = r[x] == 0;
r.f.n = 1;
r.f.h = (r[x] & 0x0f) == 0x0f;
}
void LR35902::op_dec_hl() {
uint8 n = op_read(r[HL]);
op_write(r[HL], --n);
r.f.z = n == 0;
r.f.n = 1;
r.f.h = (n & 0x0f) == 0x0f;
}
void LR35902::op_daa() {
uint16 a = r[A];
if(r.f.n == 0) {
if(r.f.h || (a & 0x0f) > 0x09) a += 0x06;
if(r.f.c || (a ) > 0x9f) a += 0x60;
} else {
if(r.f.h) {
a -= 0x06;
if(r.f.c == 0) a &= 0xff;
}
if(r.f.c) a -= 0x60;
}
r[A] = a;
r.f.z = r[A] == 0;
r.f.h = 0;
r.f.c |= a & 0x100;
}
void LR35902::op_cpl() {
r[A] ^= 0xff;
r.f.n = 1;
r.f.h = 1;
}
//16-bit arithmetic commands
template<unsigned x> void LR35902::op_add_hl_rr() {
op_io();
uint32 rb = (r[HL] + r[x]);
uint32 rn = (r[HL] & 0xfff) + (r[x] & 0xfff);
r[HL] = rb;
r.f.n = 0;
r.f.h = rn > 0x0fff;
r.f.c = rb > 0xffff;
}
template<unsigned x> void LR35902::op_inc_rr() {
op_io();
r[x]++;
}
template<unsigned x> void LR35902::op_dec_rr() {
op_io();
r[x]--;
}
void LR35902::op_add_sp_n() {
op_io();
op_io();
signed n = (int8)op_read(r[PC]++);
r.f.z = 0;
r.f.n = 0;
r.f.h = ((r[SP] & 0x0f) + (n & 0x0f)) > 0x0f;
r.f.c = ((r[SP] & 0xff) + (n & 0xff)) > 0xff;
r[SP] += n;
}
void LR35902::op_ld_hl_sp_n() {
op_io();
signed n = (int8)op_read(r[PC]++);
r.f.z = 0;
r.f.n = 0;
r.f.h = ((r[SP] & 0x0f) + (n & 0x0f)) > 0x0f;
r.f.c = ((r[SP] & 0xff) + (n & 0xff)) > 0xff;
r[HL] = r[SP] + n;
}
//rotate/shift commands
void LR35902::op_rlca() {
r[A] = (r[A] << 1) | (r[A] >> 7);
r.f.z = 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = r[A] & 0x01;
}
void LR35902::op_rla() {
bool c = r[A] & 0x80;
r[A] = (r[A] << 1) | (r.f.c << 0);
r.f.z = 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
void LR35902::op_rrca() {
r[A] = (r[A] >> 1) | (r[A] << 7);
r.f.z = 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = r[A] & 0x80;
}
void LR35902::op_rra() {
bool c = r[A] & 0x01;
r[A] = (r[A] >> 1) | (r.f.c << 7);
r.f.z = 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
template<unsigned x> void LR35902::op_rlc_r() {
r[x] = (r[x] << 1) | (r[x] >> 7);
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = r[x] & 0x01;
}
void LR35902::op_rlc_hl() {
uint8 n = op_read(r[HL]);
n = (n << 1) | (n >> 7);
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = n & 0x01;
}
template<unsigned x> void LR35902::op_rl_r() {
bool c = r[x] & 0x80;
r[x] = (r[x] << 1) | (r.f.c << 0);
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
void LR35902::op_rl_hl() {
uint8 n = op_read(r[HL]);
bool c = n & 0x80;
n = (n << 1) | (r.f.c << 0);
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
template<unsigned x> void LR35902::op_rrc_r() {
r[x] = (r[x] >> 1) | (r[x] << 7);
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = r[x] & 0x80;
}
void LR35902::op_rrc_hl() {
uint8 n = op_read(r[HL]);
n = (n >> 1) | (n << 7);
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = n & 0x80;
}
template<unsigned x> void LR35902::op_rr_r() {
bool c = r[x] & 0x01;
r[x] = (r[x] >> 1) | (r.f.c << 7);
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
void LR35902::op_rr_hl() {
uint8 n = op_read(r[HL]);
bool c = n & 0x01;
n = (n >> 1) | (r.f.c << 7);
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
template<unsigned x> void LR35902::op_sla_r() {
bool c = r[x] & 0x80;
r[x] <<= 1;
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
void LR35902::op_sla_hl() {
uint8 n = op_read(r[HL]);
bool c = n & 0x80;
n <<= 1;
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
template<unsigned x> void LR35902::op_swap_r() {
r[x] = (r[x] << 4) | (r[x] >> 4);
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = 0;
}
void LR35902::op_swap_hl() {
uint8 n = op_read(r[HL]);
n = (n << 4) | (n >> 4);
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = 0;
}
template<unsigned x> void LR35902::op_sra_r() {
bool c = r[x] & 0x01;
r[x] = (int8)r[x] >> 1;
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
void LR35902::op_sra_hl() {
uint8 n = op_read(r[HL]);
bool c = n & 0x01;
n = (int8)n >> 1;
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
template<unsigned x> void LR35902::op_srl_r() {
bool c = r[x] & 0x01;
r[x] >>= 1;
r.f.z = r[x] == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
void LR35902::op_srl_hl() {
uint8 n = op_read(r[HL]);
bool c = n & 0x01;
n >>= 1;
op_write(r[HL], n);
r.f.z = n == 0;
r.f.n = 0;
r.f.h = 0;
r.f.c = c;
}
//single-bit commands
template<unsigned b, unsigned x> void LR35902::op_bit_n_r() {
r.f.z = (r[x] & (1 << b)) == 0;
r.f.n = 0;
r.f.h = 1;
}
template<unsigned b> void LR35902::op_bit_n_hl() {
uint8 n = op_read(r[HL]);
r.f.z = (n & (1 << b)) == 0;
r.f.n = 0;
r.f.h = 1;
}
template<unsigned b, unsigned x> void LR35902::op_set_n_r() {
r[x] |= 1 << b;
}
template<unsigned b> void LR35902::op_set_n_hl() {
uint8 n = op_read(r[HL]);
n |= 1 << b;
op_write(r[HL], n);
}
template<unsigned b, unsigned x> void LR35902::op_res_n_r() {
r[x] &= ~(1 << b);
}
template<unsigned b> void LR35902::op_res_n_hl() {
uint8 n = op_read(r[HL]);
n &= ~(1 << b);
op_write(r[HL], n);
}
//control commands
void LR35902::op_ccf() {
r.f.n = 0;
r.f.h = 0;
r.f.c = !r.f.c;
}
void LR35902::op_scf() {
r.f.n = 0;
r.f.h = 0;
r.f.c = 1;
}
void LR35902::op_nop() {
}
void LR35902::op_halt() {
r.halt = true;
while(r.halt == true) op_io();
}
void LR35902::op_stop() {
if(stop()) return;
r.stop = true;
while(r.stop == true) op_io();
}
void LR35902::op_di() {
r.ime = 0;
}
void LR35902::op_ei() {
r.ei = true;
//r.ime = 1;
}
//jump commands
void LR35902::op_jp_nn() {
uint8 lo = op_read(r[PC]++);
uint8 hi = op_read(r[PC]++);
r[PC] = (hi << 8) | (lo << 0);
op_io();
}
void LR35902::op_jp_hl() {
r[PC] = r[HL];
}
template<unsigned x, bool y> void LR35902::op_jp_f_nn() {
uint8 lo = op_read(r[PC]++);
uint8 hi = op_read(r[PC]++);
if(r.f[x] == y) {
r[PC] = (hi << 8) | (lo << 0);
op_io();
}
}
void LR35902::op_jr_n() {
int8 n = op_read(r[PC]++);
r[PC] += n;
op_io();
}
template<unsigned x, bool y> void LR35902::op_jr_f_n() {
int8 n = op_read(r[PC]++);
if(r.f[x] == y) {
r[PC] += n;
op_io();
}
}
void LR35902::op_call_nn() {
uint8 lo = op_read(r[PC]++);
uint8 hi = op_read(r[PC]++);
op_write(--r[SP], r[PC] >> 8);
op_write(--r[SP], r[PC] >> 0);
r[PC] = (hi << 8) | (lo << 0);
op_io();
}
template<unsigned x, bool y> void LR35902::op_call_f_nn() {
uint8 lo = op_read(r[PC]++);
uint8 hi = op_read(r[PC]++);
if(r.f[x] == y) {
op_write(--r[SP], r[PC] >> 8);
op_write(--r[SP], r[PC] >> 0);
r[PC] = (hi << 8) | (lo << 0);
op_io();
}
}
void LR35902::op_ret() {
uint8 lo = op_read(r[SP]++);
uint8 hi = op_read(r[SP]++);
r[PC] = (hi << 8) | (lo << 0);
op_io();
}
template<unsigned x, bool y> void LR35902::op_ret_f() {
op_io();
if(r.f[x] == y) {
uint8 lo = op_read(r[SP]++);
uint8 hi = op_read(r[SP]++);
r[PC] = (hi << 8) | (lo << 0);
op_io();
}
}
void LR35902::op_reti() {
uint8 lo = op_read(r[SP]++);
uint8 hi = op_read(r[SP]++);
r[PC] = (hi << 8) | (lo << 0);
op_io();
r.ime = 1;
}
template<unsigned n> void LR35902::op_rst_n() {
op_write(--r[SP], r[PC] >> 8);
op_write(--r[SP], r[PC] >> 0);
r[PC] = n;
op_io();
}
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