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Unroll some APU loops

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This commit is contained in:
Lior Halphon 2018-12-31 23:09:56 +02:00
parent af0430dbc5
commit 9d947c7ce6
1 changed files with 3 additions and 0 deletions
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3
Core/apu.c
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@ -69,6 +69,7 @@ static void update_sample(GB_gameboy_t *gb, unsigned index, int8_t value, unsign
static void render(GB_gameboy_t *gb, bool no_downsampling, GB_sample_t *dest) static void render(GB_gameboy_t *gb, bool no_downsampling, GB_sample_t *dest)
{ {
GB_sample_t output = {0,0}; GB_sample_t output = {0,0};
#pragma unroll
for (unsigned i = GB_N_CHANNELS; i--;) { for (unsigned i = GB_N_CHANNELS; i--;) {
double multiplier = CH_STEP; double multiplier = CH_STEP;
if (!is_DAC_enabled(gb, i)) { if (!is_DAC_enabled(gb, i)) {
@ -125,6 +126,7 @@ static void render(GB_gameboy_t *gb, bool no_downsampling, GB_sample_t *dest)
unsigned mask = gb->io_registers[GB_IO_NR51]; unsigned mask = gb->io_registers[GB_IO_NR51];
unsigned left_volume = 0; unsigned left_volume = 0;
unsigned right_volume = 0; unsigned right_volume = 0;
#pragma unroll
for (unsigned i = GB_N_CHANNELS; i--;) { for (unsigned i = GB_N_CHANNELS; i--;) {
if (gb->apu.is_active[i]) { if (gb->apu.is_active[i]) {
if (mask & 1) { if (mask & 1) {
@ -372,6 +374,7 @@ void GB_apu_run(GB_gameboy_t *gb)
} }
} }
#pragma unroll
for (unsigned i = GB_SQUARE_2 + 1; i--;) { for (unsigned i = GB_SQUARE_2 + 1; i--;) {
if (gb->apu.is_active[i]) { if (gb->apu.is_active[i]) {
uint8_t cycles_left = cycles; uint8_t cycles_left = cycles;