mirror of
https://github.com/devinacker/bsnes-plus.git
synced 2025-04-02 10:52:46 -04:00
497 lines
10 KiB
C++
497 lines
10 KiB
C++
#ifdef SUPERFX_CPP
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//$00 stop
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void SuperFX::op_stop() {
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if(regs.cfgr.irq == 0) {
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regs.sfr.irq = 1;
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cpu.regs.irq = 1;
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}
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regs.sfr.g = 0;
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regs.pipeline = 0x01;
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regs.reset();
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}
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//$01 nop
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void SuperFX::op_nop() {
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regs.reset();
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}
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//$02 cache
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void SuperFX::op_cache() {
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if(regs.cbr != (regs.r[15] & 0xfff0)) {
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regs.cbr = regs.r[15] & 0xfff0;
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cache_flush();
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}
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regs.reset();
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}
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//$03 lsr
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void SuperFX::op_lsr() {
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regs.sfr.cy = (regs.sr() & 1);
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regs.dr() = regs.sr() >> 1;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$04 rol
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void SuperFX::op_rol() {
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bool carry = (regs.sr() & 0x8000);
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regs.dr() = (regs.sr() << 1) | regs.sfr.cy;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.cy = carry;
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$05 bra e
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//$06 bge e
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//$07 blt e
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//$08 bne e
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//$09 beq e
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//$0a bpl e
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//$0b bmi e
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//$0c bcc e
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//$0d bcs e
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//$0e bvc e
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//$0f bvs e
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void SuperFX::op_bra() {
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regs.r[15] += (int8)pipe();
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}
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//untaken branch
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void SuperFX::op_nobranch() {
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pipe();
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}
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//$10-1f(b0): to rN
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//$10-1f(b1): move rN
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void SuperFX::op_to_move(unsigned n) {
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if(regs.sfr.b == 0) {
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regs.dreg = n;
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} else {
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regs.r[n] = regs.sr();
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regs.reset();
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}
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}
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//$20-2f: with rN
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void SuperFX::op_with(unsigned n) {
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regs.sreg = n;
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regs.dreg = n;
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regs.sfr.b = 1;
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}
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//$30-3b(alt0): stw (rN)
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//$30-3b(alt1): stb (rN)
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void SuperFX::op_stw_stb(unsigned n) {
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regs.ramaddr = regs.r[n];
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rambuffer_write(regs.ramaddr, regs.sr());
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if(!regs.sfr.alt1)
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rambuffer_write(regs.ramaddr ^ 1, regs.sr() >> 8);
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regs.reset();
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}
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//$3c loop
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void SuperFX::op_loop() {
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regs.r[12]--;
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regs.sfr.s = (regs.r[12] & 0x8000);
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regs.sfr.z = (regs.r[12] == 0);
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if(!regs.sfr.z) regs.r[15] = regs.r[13];
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regs.reset();
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}
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//$3d alt1
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void SuperFX::op_alt1() {
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regs.sfr.b = 0;
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regs.sfr.alt1 = 1;
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}
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//$3e alt2
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void SuperFX::op_alt2() {
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regs.sfr.b = 0;
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regs.sfr.alt2 = 1;
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}
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//$3f alt3
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void SuperFX::op_alt3() {
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regs.sfr.b = 0;
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regs.sfr.alt1 = 1;
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regs.sfr.alt2 = 1;
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}
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//$40-4b(alt0): ldw (rN)
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//$40-4b(alt1): ldb (rN)
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void SuperFX::op_ldw_ldb(unsigned n) {
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regs.ramaddr = regs.r[n];
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unsigned data = rambuffer_read(regs.ramaddr);
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if(!regs.sfr.alt1)
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data |= rambuffer_read(regs.ramaddr ^ 1) << 8;
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regs.dr() = data;
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regs.reset();
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}
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//$4c(alt0): plot
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void SuperFX::op_plot() {
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plot(regs.r[1], regs.r[2]);
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regs.r[1]++;
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regs.reset();
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}
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//$4c(alt1): rpix
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void SuperFX::op_rpix() {
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regs.dr() = rpix(regs.r[1], regs.r[2]);
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$4d: swap
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void SuperFX::op_swap() {
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regs.dr() = (regs.sr() >> 8) | (regs.sr() << 8);
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$4e(alt0): color
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void SuperFX::op_color() {
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regs.colr = color(regs.sr());
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regs.reset();
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}
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//$4e(alt1): cmode
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void SuperFX::op_cmode() {
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regs.por = regs.sr();
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regs.reset();
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}
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//$4f: not
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void SuperFX::op_not() {
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regs.dr() = ~regs.sr();
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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unsigned SuperFX::reg_or_imm(unsigned n) {
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return regs.sfr.alt2 ? n : regs.r[n];
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}
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//$50-5f(alt0): add rN
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//$50-5f(alt1): adc rN
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//$50-5f(alt2): add #N
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//$50-5f(alt3): adc #N
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void SuperFX::op_add_adc(unsigned n) {
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unsigned b = reg_or_imm(n);
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unsigned r = regs.sr() + b + (regs.sfr.alt1 & regs.sfr.cy);
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regs.sfr.ov = (regs.sr() ^ r) & (b ^ r) & 0x8000;
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regs.sfr.s = (r & 0x8000);
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regs.sfr.cy = (r >= 0x10000);
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regs.sfr.z = ((uint16_t)r == 0);
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regs.dr() = r;
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regs.reset();
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}
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//$60-6f(alt0): sub rN
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//$60-6f(alt1): sbc rN
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//$60-6f(alt2): sub #N
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void SuperFX::op_sub_sbc(unsigned n) {
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int b = reg_or_imm(n);
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int r = regs.sr() - b - (regs.sfr.alt1 & !regs.sfr.cy);
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regs.sfr.ov = (regs.sr() ^ b) & (regs.sr() ^ r) & 0x8000;
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regs.sfr.s = (r & 0x8000);
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regs.sfr.cy = (r >= 0);
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regs.sfr.z = ((uint16_t)r == 0);
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regs.dr() = r;
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regs.reset();
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}
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//$60-6f(alt3): cmp rN
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void SuperFX::op_cmp(unsigned n) {
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int b = regs.r[n];
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int r = regs.sr() - b;
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regs.sfr.ov = (regs.sr() ^ b) & (regs.sr() ^ r) & 0x8000;
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regs.sfr.s = (r & 0x8000);
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regs.sfr.cy = (r >= 0);
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regs.sfr.z = ((uint16_t)r == 0);
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regs.reset();
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}
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//$70: merge
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void SuperFX::op_merge() {
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regs.dr() = (regs.r[7] & 0xff00) | (regs.r[8] >> 8);
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regs.sfr.ov = (regs.dr() & 0xc0c0);
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regs.sfr.s = (regs.dr() & 0x8080);
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regs.sfr.cy = (regs.dr() & 0xe0e0);
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regs.sfr.z = (regs.dr() & 0xf0f0);
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regs.reset();
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}
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//$71-7f(alt0): and rN
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//$71-7f(alt1): bic rN
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//$71-7f(alt2): and #N
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//$71-7f(alt3): bic #N
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void SuperFX::op_and_bic(unsigned n) {
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unsigned b = reg_or_imm(n);
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if(regs.sfr.alt1) b = ~b;
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regs.dr() = regs.sr() & b;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$80-8f(alt0): mult rN
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//$80-8f(alt2): mult #N
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void SuperFX::op_mult(unsigned n) {
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int8 b = reg_or_imm(n);
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regs.dr() = (int8)regs.sr() * b;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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if(!regs.cfgr.ms0) add_clocks(regs.clsr.divider);
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}
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//$80-8f(alt1): umult rN
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//$80-8f(alt3): umult #N
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void SuperFX::op_umult(unsigned n) {
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uint8 b = reg_or_imm(n);
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regs.dr() = (uint8)regs.sr() * b;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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if(!regs.cfgr.ms0) add_clocks(regs.clsr.divider);
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}
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//$90: sbk
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void SuperFX::op_sbk() {
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rambuffer_write(regs.ramaddr ^ 0, regs.sr() >> 0);
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rambuffer_write(regs.ramaddr ^ 1, regs.sr() >> 8);
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regs.reset();
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}
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//$91-94: link #N
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void SuperFX::op_link(unsigned n) {
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regs.r[11] = regs.r[15] + n;
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regs.reset();
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}
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//$95: sex
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void SuperFX::op_sex() {
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regs.dr() = (int8)regs.sr();
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$96(alt0): asr
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//$96(alt1): div2
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void SuperFX::op_asr_div2() {
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int16 r = regs.sr();
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regs.sfr.cy = (r & 1);
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regs.dr() = (r == -1 && regs.sfr.alt1) ? 0 : r >> 1;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$97: ror
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void SuperFX::op_ror() {
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bool carry = (regs.sr() & 1);
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regs.dr() = (regs.sfr.cy << 15) | (regs.sr() >> 1);
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.cy = carry;
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$98-9d(alt0): jmp rN
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void SuperFX::op_jmp(unsigned n) {
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regs.r[15] = regs.r[n];
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regs.reset();
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}
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//$98-9d(alt1): ljmp rN
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void SuperFX::op_ljmp(unsigned n) {
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regs.pbr = regs.r[n];
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regs.r[15] = regs.sr();
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regs.cbr = regs.r[15] & 0xfff0;
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cache_flush();
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regs.reset();
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}
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//$9e: lob
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void SuperFX::op_lob() {
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regs.dr() = regs.sr() & 0xff;
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regs.sfr.s = (regs.dr() & 0x80);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$9f(alt0): fmult
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//$9f(alt1): lmult
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void SuperFX::op_fmult_lmult() {
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int result = (int16_t)regs.sr() * (int16_t)regs.r[6];
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if(regs.sfr.alt1) regs.r[4] = result;
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regs.dr() = result >> 16;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.cy = (result & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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add_clocks((regs.cfgr.ms0 ? 3 : 7) * regs.clsr.divider);
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}
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//$a0-af(alt0): ibt rN,#pp
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void SuperFX::op_ibt(unsigned n) {
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regs.r[n] = (int8)pipe();
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regs.reset();
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}
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//$a0-af(alt1): lms rN,(yy)
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void SuperFX::op_lms(unsigned n) {
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regs.ramaddr = pipe() << 1;
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unsigned data = rambuffer_read(regs.ramaddr);
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data |= rambuffer_read(regs.ramaddr ^ 1) << 8;
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regs.r[n] = data;
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regs.reset();
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}
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//$a0-af(alt2): sms (yy),rN
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void SuperFX::op_sms(unsigned n) {
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regs.ramaddr = pipe() << 1;
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rambuffer_write(regs.ramaddr ^ 0, regs.r[n] >> 0);
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rambuffer_write(regs.ramaddr ^ 1, regs.r[n] >> 8);
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regs.reset();
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}
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//$b0-bf(b0): from rN
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//$b0-bf(b1): moves rN
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void SuperFX::op_from_moves(unsigned n) {
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if(regs.sfr.b == 0) {
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regs.sreg = n;
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} else {
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regs.dr() = regs.r[n];
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regs.sfr.ov = (regs.dr() & 0x80);
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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}
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//$c0: hib
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void SuperFX::op_hib() {
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regs.dr() = regs.sr() >> 8;
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regs.sfr.s = (regs.dr() & 0x80);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$c1-cf(alt0): or rN
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//$c1-cf(alt2): or #N
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void SuperFX::op_or(unsigned n) {
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unsigned b = reg_or_imm(n);
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regs.dr() = regs.sr() | b;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$c1-cf(alt1): xor rN
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//$c1-cf(alt3): xor #N
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void SuperFX::op_xor(unsigned n) {
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unsigned b = reg_or_imm(n);
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regs.dr() = regs.sr() ^ b;
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regs.sfr.s = (regs.dr() & 0x8000);
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regs.sfr.z = (regs.dr() == 0);
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regs.reset();
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}
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//$d0-de: inc rN
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void SuperFX::op_inc(unsigned n) {
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regs.r[n]++;
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regs.sfr.s = (regs.r[n] & 0x8000);
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regs.sfr.z = (regs.r[n] == 0);
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regs.reset();
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}
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//$df(alt0): getc
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void SuperFX::op_getc() {
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regs.colr = color(rombuffer_read());
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regs.reset();
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}
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//$df(alt2): ramb
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void SuperFX::op_ramb() {
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rambuffer_sync();
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regs.rambr = regs.sr() & 1;
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regs.reset();
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}
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//$df(alt3): romb
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void SuperFX::op_romb() {
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rombuffer_sync();
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regs.rombr = regs.sr();
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regs.reset();
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}
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//$e0-ee: dec rN
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void SuperFX::op_dec(unsigned n) {
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regs.r[n]--;
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regs.sfr.s = (regs.r[n] & 0x8000);
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regs.sfr.z = (regs.r[n] == 0);
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regs.reset();
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}
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//$ef(alt0): getb
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void SuperFX::op_getb() {
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regs.dr() = rombuffer_read();
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regs.reset();
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}
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//$ef(alt1): getbh
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void SuperFX::op_getbh() {
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regs.dr() = (rombuffer_read() << 8) | (regs.sr() & 0x00ff);
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regs.reset();
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}
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//$ef(alt2): getbl
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void SuperFX::op_getbl() {
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regs.dr() = (regs.sr() & 0xff00) | (rombuffer_read() << 0);
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regs.reset();
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}
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//$ef(alt3): getbs
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void SuperFX::op_getbs() {
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regs.dr() = (int8)rombuffer_read();
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regs.reset();
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}
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//$f0-ff(alt0): iwt rN,#xx
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void SuperFX::op_iwt(unsigned n) {
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unsigned data = pipe();
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data |= pipe() << 8;
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regs.r[n] = data;
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regs.reset();
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}
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//$f0-ff(alt1): lm rN,(xx)
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void SuperFX::op_lm(unsigned n) {
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regs.ramaddr = pipe() << 0;
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regs.ramaddr |= pipe() << 8;
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unsigned data = rambuffer_read(regs.ramaddr);
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data |= rambuffer_read(regs.ramaddr ^ 1) << 8;
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regs.r[n] = data;
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regs.reset();
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}
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//$f0-ff(alt2): sm (xx),rN
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void SuperFX::op_sm(unsigned n) {
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regs.ramaddr = pipe() << 0;
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regs.ramaddr |= pipe() << 8;
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rambuffer_write(regs.ramaddr ^ 0, regs.r[n] >> 0);
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rambuffer_write(regs.ramaddr ^ 1, regs.r[n] >> 8);
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regs.reset();
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}
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#endif
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