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Merge pull request #14560 from benpicco/cpu/mips_pic32_common-bitarithm_test_and_clear

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cpu/mips_pic32_common: GPIO: use bitarithm_test_and_clear()
This commit is contained in:
Marian Buschsieweke 2021-02-02 15:24:13 +01:00 committed by GitHub
commit 00d013d7cf
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2 changed files with 17 additions and 9 deletions
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8
cpu/mips32r2_common/include/cpu.h
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@ -32,6 +32,14 @@
extern "C" {
#endif
/**
* @brief Select fastest bitarithm_lsb implementation
* @{
*/
#define BITARITHM_LSB_BUILTIN
#define BITARITHM_HAS_CLZ
/** @} */
/**
* @brief Print the last instruction's address
*

18
cpu/mips_pic32_common/periph/gpio.c
View File

@ -21,6 +21,7 @@
#include "cpu.h"
#include "eic.h"
#include "bitarithm.h"
#include "periph/gpio.h"
#include "periph_conf.h"
@ -88,14 +89,13 @@ static gpio_isr_ctx_t isr_ctx[PORT_NUMOF][GPIO_NUMOF];
static void isr_handler(uint32_t port_addr)
{
uint32_t cnstat = CNSTATx(_port(port_addr));
uint32_t port = PORTx(_port(port_addr));
cnstat &= (1 << GPIO_NUMOF) - 1;
uint8_t pin = 0;
while (cnstat) {
/* we want the position of the first one bit, so N_bits - (N_zeros + 1) */
int pin = 32 - __builtin_clz(cnstat) - 1;
uint32_t port = PORTx(_port(port_addr));
cnstat = bitarithm_test_and_clear(cnstat, &pin);
cnstat &= ~(1 << pin);
if (isr_flank[_port_num(port_addr)][pin] == GPIO_BOTH
|| (isr_flank[_port_num(port_addr)][pin] == GPIO_RISING && (port & (1U << pin)))
|| (isr_flank[_port_num(port_addr)][pin] == GPIO_FALLING && !(port & (1U << pin))))
@ -132,12 +132,12 @@ static void cn_isr(void)
#elif defined(CPU_FAM_PIC32MZ)
static void isr_handler(uint32_t port_addr)
{
while (CNFx(_port(port_addr))) {
/* we want the position of the first one bit, so N_bits - (N_zeros + 1) */
int pin = 32 - __builtin_clz(CNFx(_port(port_addr))) - 1;
uint8_t pin = 0;
unsigned state = CNFx(_port(port_addr));
CNFx(_port(port_addr)) = 0;
while (state) {
state = bitarithm_test_and_clear(state, &pin);
isr_ctx[_port_num(port_addr)][pin].cb(isr_ctx[_port_num(port_addr)][pin].arg);
CNFx(_port(port_addr)) &= ~(1U << pin);
}
}