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revert to use __builtin_ctz() for optimized time

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hathach 2024-04-15 23:56:55 +07:00
parent b992b6d7a6
commit 6328301bb6
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GPG Key ID: 26FAB84F615C3C52
2 changed files with 32 additions and 20 deletions
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22
src/portable/renesas/rusb2/dcd_rusb2.c
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@ -915,6 +915,18 @@ void dcd_edpt_clear_stall(uint8_t rhport, uint8_t ep_addr)
//--------------------------------------------------------------------+
// ISR
//--------------------------------------------------------------------+
#if defined(__CCRX__)
TU_ATTR_ALWAYS_INLINE static inline unsigned __builtin_ctz(unsigned int value) {
unsigned int count = 0;
while ((value & 1) == 0) {
value >>= 1;
count++;
}
return count;
}
#endif
void dcd_int_handler(uint8_t rhport)
{
rusb2_reg_t* rusb = RUSB2_REG(rhport);
@ -1002,13 +1014,13 @@ void dcd_int_handler(uint8_t rhport)
// Buffer ready
if ( is0 & RUSB2_INTSTS0_BRDY_Msk ) {
const unsigned m = rusb->BRDYENB;
const unsigned s = rusb->BRDYSTS & m;
unsigned s = rusb->BRDYSTS & m;
/* clear active bits (don't write 0 to already cleared bits according to the HW manual) */
rusb->BRDYSTS = ~s;
for (unsigned p = 0; p < PIPE_COUNT; ++p) {
if (tu_bit_test(s, p)) {
process_pipe_brdy(rhport, p);
}
while (s) {
const unsigned num = __builtin_ctz(s);
process_pipe_brdy(rhport, num);
s &= ~TU_BIT(num);
}
}
}

30
src/portable/renesas/rusb2/hcd_rusb2.c
View File

@ -758,6 +758,17 @@ bool hcd_edpt_clear_stall(uint8_t rhport, uint8_t dev_addr, uint8_t ep_addr) {
//--------------------------------------------------------------------+
// ISR
//--------------------------------------------------------------------+
#if defined(__CCRX__)
TU_ATTR_ALWAYS_INLINE static inline unsigned __builtin_ctz(unsigned int value) {
unsigned int count = 0;
while ((value & 1) == 0) {
value >>= 1;
count++;
}
return count;
}
#endif
void hcd_int_handler(uint8_t rhport, bool in_isr) {
(void) in_isr;
@ -807,23 +818,12 @@ void hcd_int_handler(uint8_t rhport, bool in_isr) {
}
}
#if defined(__CCRX__)
static const int Mod37BitPosition[] = {
-1, 0, 1, 26, 2, 23, 27, 0, 3, 16, 24, 30, 28, 11, 0, 13, 4,
7, 17, 0, 25, 22, 31, 15, 29, 10, 12, 6, 0, 21, 14, 9, 5,
20, 8, 19, 18};
#endif
if (is0 & RUSB2_INTSTS0_NRDY_Msk) {
const unsigned m = rusb->NRDYENB;
unsigned s = rusb->NRDYSTS & m;
rusb->NRDYSTS = ~s;
while (s) {
#if defined(__CCRX__)
const unsigned num = Mod37BitPosition[(-s & s) % 37];
#else
const unsigned num = __builtin_ctz(s);
#endif
process_pipe_nrdy(rhport, num);
s &= ~TU_BIT(num);
}
@ -833,10 +833,10 @@ void hcd_int_handler(uint8_t rhport, bool in_isr) {
unsigned s = rusb->BRDYSTS & m;
/* clear active bits (don't write 0 to already cleared bits according to the HW manual) */
rusb->BRDYSTS = ~s;
for (unsigned p = 0; p < PIPE_COUNT; ++p) {
if (tu_bit_test(s, p)) {
process_pipe_brdy(rhport, p);
}
while (s) {
const unsigned num = __builtin_ctz(s);
process_pipe_brdy(rhport, num);
s &= ~TU_BIT(num);
}
}
}