Can you use assembly to optimize this code for me?

[liuyanfeng]

Can you write this code in assembly?

If you can, please help me, if not, please help me optimize, thank you

# define RSP NRF_GPIO_PIN_MAP (0, 6)

# define RDP NRF_GPIO_PIN_MAP (0, 4)

static void SPI_WriteCmd8Bit( uint8_t CByte )

{

NRF_GPIO_Type *p_reg=NRF_P0;

uint32_t value=0;

Nrf_gpio_pin_clear (RSP);

Nrf_gpio_pin_set (RSP);

value = p_reg-> OUT; value &= ~(0xFF< < 24);

value |= (CByte< < 24); p_reg-> OUT = value;

Nrf_gpio_pin_clear (RDP);

Nrf_gpio_pin_set (RDP);

}

Thank you

[Susheel Nuguru]

Why do you need this code in assembly? isn't the assembly generated by the compiler optimized enough for this? If not what exactly is your usecase?

[liuyanfeng]

Speed up the screen refresh rate

[Susheel Nuguru]

Super specific case, not sure if anyone is going to spend that time here for you but you can try to start with the already generated assembly file and see if there is something you can do there. 

arm-none-eabi-gcc -S -o my_asm_output.s display.c

Not much of a help but a good start atleast