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-avr8: Slightly improved tick_timer1 performance, nw

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This commit is contained in:
MooglyGuy 2020-03-01 11:19:07 +01:00
parent a5ae68efbe
commit 00271822e2
1 changed files with 18 additions and 16 deletions
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34
src/devices/cpu/avr8/avr8.cpp
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@ -1292,12 +1292,12 @@ void avr8_device::timer1_tick()
int32_t wgm1 = ((m_r[AVR8_REGIDX_TCCR1B] & AVR8_TCCR1B_WGM1_32_MASK) >> 1) | int32_t wgm1 = ((m_r[AVR8_REGIDX_TCCR1B] & AVR8_TCCR1B_WGM1_32_MASK) >> 1) |
(m_r[AVR8_REGIDX_TCCR1A] & AVR8_TCCR1A_WGM1_10_MASK); (m_r[AVR8_REGIDX_TCCR1A] & AVR8_TCCR1A_WGM1_10_MASK);
int32_t compare_mode[2] = { (m_r[AVR8_REGIDX_TCCR1A] & AVR8_TCCR1A_COM1A_MASK) >> AVR8_TCCR1A_COM1A_SHIFT, const uint16_t ocr1[2] = { static_cast<uint16_t>((m_r[AVR8_REGIDX_OCR1AH] << 8) | m_r[AVR8_REGIDX_OCR1AL]),
(m_r[AVR8_REGIDX_TCCR1A] & AVR8_TCCR1A_COM1B_MASK) >> AVR8_TCCR1A_COM1B_SHIFT }; static_cast<uint16_t>((m_r[AVR8_REGIDX_OCR1BH] << 8) | m_r[AVR8_REGIDX_OCR1BL]) };
uint16_t ocr1[2] = { static_cast<uint16_t>((m_r[AVR8_REGIDX_OCR1AH] << 8) | m_r[AVR8_REGIDX_OCR1AL]), static const uint8_t s_com_mask[2] = { AVR8_TCCR1A_COM1A_MASK, AVR8_TCCR1A_COM1B_MASK };
static_cast<uint16_t>((m_r[AVR8_REGIDX_OCR1BH] << 8) | m_r[AVR8_REGIDX_OCR1BL]) }; static const uint8_t s_com_shift[2] = { AVR8_TCCR1A_COM1A_SHIFT, AVR8_TCCR1A_COM1B_SHIFT };
uint8_t ocf1[2] = { (1 << AVR8_TIFR1_OCF1A_SHIFT), (1 << AVR8_TIFR1_OCF1B_SHIFT) }; static const uint8_t s_ocf1[2] = { (1 << AVR8_TIFR1_OCF1A_SHIFT), (1 << AVR8_TIFR1_OCF1B_SHIFT) };
uint8_t int1[2] = { AVR8_INTIDX_OCF1A, AVR8_INTIDX_OCF1B }; static const uint8_t s_int1[2] = { AVR8_INTIDX_OCF1A, AVR8_INTIDX_OCF1B };
int32_t increment = m_timer_increment[1]; int32_t increment = m_timer_increment[1];
for (int32_t reg = AVR8_REG_A; reg <= AVR8_REG_B; reg++) for (int32_t reg = AVR8_REG_A; reg <= AVR8_REG_B; reg++)
@ -1320,8 +1320,8 @@ void avr8_device::timer1_tick()
count = 0; count = 0;
increment = 0; increment = 0;
} }
m_r[AVR8_REGIDX_TIFR1] |= ocf1[reg]; m_r[AVR8_REGIDX_TIFR1] |= s_ocf1[reg];
update_interrupt(int1[reg]); update_interrupt(s_int1[reg]);
} }
else if (count == 0) else if (count == 0)
{ {
@ -1331,8 +1331,8 @@ void avr8_device::timer1_tick()
update_interrupt(AVR8_INTIDX_TOV1); update_interrupt(AVR8_INTIDX_TOV1);
} }
m_r[AVR8_REGIDX_TIFR1] &= ~ocf1[reg]; m_r[AVR8_REGIDX_TIFR1] &= ~s_ocf1[reg];
update_interrupt(int1[reg]); update_interrupt(s_int1[reg]);
} }
break; break;
@ -1347,7 +1347,8 @@ void avr8_device::timer1_tick()
increment = 0; increment = 0;
} }
switch (compare_mode[reg]) const int32_t compare_mode = (m_r[AVR8_REGIDX_TCCR1A] & s_com_mask[reg]) >> s_com_shift[reg];
switch (compare_mode)
{ {
case 0: /* Normal Operation; OC1A/B disconnected */ case 0: /* Normal Operation; OC1A/B disconnected */
break; break;
@ -1371,8 +1372,8 @@ void avr8_device::timer1_tick()
break; break;
} }
m_r[AVR8_REGIDX_TIFR1] |= ocf1[reg]; m_r[AVR8_REGIDX_TIFR1] |= s_ocf1[reg];
update_interrupt(int1[reg]); update_interrupt(s_int1[reg]);
} }
else if (count == 0) else if (count == 0)
{ {
@ -1382,7 +1383,8 @@ void avr8_device::timer1_tick()
update_interrupt(AVR8_INTIDX_TOV1); update_interrupt(AVR8_INTIDX_TOV1);
} }
switch (compare_mode[reg]) const int32_t compare_mode = (m_r[AVR8_REGIDX_TCCR1A] & s_com_mask[reg]) >> s_com_shift[reg];
switch (compare_mode)
{ {
case 0: /* Normal Operation; OC1A/B disconnected */ case 0: /* Normal Operation; OC1A/B disconnected */
break; break;
@ -1406,8 +1408,8 @@ void avr8_device::timer1_tick()
break; break;
} }
m_r[AVR8_REGIDX_TIFR1] &= ~ocf1[reg]; m_r[AVR8_REGIDX_TIFR1] &= ~s_ocf1[reg];
update_interrupt(int1[reg]); update_interrupt(s_int1[reg]);
} }
break; break;