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sh2 drc: optimizations for MIPS code emitting

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kub 2019-11-09 10:30:57 +01:00
parent 9bd6706dca
commit aaea8e3ecd
6 changed files with 698 additions and 268 deletions
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14
pico/32x/32x.c
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@ -38,17 +38,19 @@ void p32x_update_irls(SH2 *active_sh2, unsigned int m68k_cycles)
if (active_sh2 != NULL)
m68k_cycles = sh2_cycles_done_m68k(active_sh2);
// find top bit = highest irq number (0 <= irl <= 14/2) by binary search
// msh2
irqs = Pico32x.sh2irqs | Pico32x.sh2irqi[0];
while ((irqs >>= 1))
mlvl++;
mlvl *= 2;
if (irqs >= 0x10) mlvl += 8, irqs >>= 4;
if (irqs >= 0x04) mlvl += 4, irqs >>= 2;
if (irqs >= 0x02) mlvl += 2, irqs >>= 1;
// ssh2
irqs = Pico32x.sh2irqs | Pico32x.sh2irqi[1];
while ((irqs >>= 1))
slvl++;
slvl *= 2;
if (irqs >= 0x10) slvl += 8, irqs >>= 4;
if (irqs >= 0x04) slvl += 4, irqs >>= 2;
if (irqs >= 0x02) slvl += 2, irqs >>= 1;
mrun = sh2_irl_irq(&msh2, mlvl, msh2.state & SH2_STATE_RUN);
if (mrun) {