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RTEMS 6.1-rc7
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Modules | |
CMSIS Core Register Access Functions | |
Macros | |
#define | __CMSIS_GCC_OUT_REG(r) "=r" (r) |
#define | __CMSIS_GCC_RW_REG(r) "+r" (r) |
#define | __CMSIS_GCC_USE_REG(r) "r" (r) |
#define | __NOP() __ASM volatile ("nop") |
No Operation. | |
#define | __WFI() __ASM volatile ("wfi":::"memory") |
Wait For Interrupt. | |
#define | __WFE() __ASM volatile ("wfe":::"memory") |
Wait For Event. | |
#define | __SEV() __ASM volatile ("sev") |
Send Event. | |
#define | __BKPT(value) __ASM volatile ("bkpt "#value) |
Breakpoint. | |
Functions | |
__STATIC_FORCEINLINE void | __ISB (void) |
Instruction Synchronization Barrier. | |
__STATIC_FORCEINLINE void | __DSB (void) |
Data Synchronization Barrier. | |
__STATIC_FORCEINLINE void | __DMB (void) |
Data Memory Barrier. | |
__STATIC_FORCEINLINE uint32_t | __REV (uint32_t value) |
Reverse byte order (32 bit) | |
__STATIC_FORCEINLINE uint32_t | __REV16 (uint32_t value) |
Reverse byte order (16 bit) | |
__STATIC_FORCEINLINE int16_t | __REVSH (int16_t value) |
Reverse byte order (16 bit) | |
__STATIC_FORCEINLINE uint32_t | __ROR (uint32_t op1, uint32_t op2) |
Rotate Right in unsigned value (32 bit) | |
__STATIC_FORCEINLINE uint32_t | __RBIT (uint32_t value) |
Reverse bit order of value. | |
__STATIC_FORCEINLINE uint8_t | __CLZ (uint32_t value) |
Count leading zeros. | |
__STATIC_FORCEINLINE int32_t | __SSAT (int32_t val, uint32_t sat) |
Signed Saturate. | |
__STATIC_FORCEINLINE uint32_t | __USAT (int32_t val, uint32_t sat) |
Unsigned Saturate. | |
Access to dedicated instructions
#define __BKPT | ( | value | ) | __ASM volatile ("bkpt "#value) |
Breakpoint.
Causes the processor to enter Debug state. Debug tools can use this to investigate system state when the instruction at a particular address is reached.
[in] | value | is ignored by the processor. If required, a debugger can use it to store additional information about the breakpoint. |
#define __NOP | ( | ) | __ASM volatile ("nop") |
No Operation.
No Operation does nothing. This instruction can be used for code alignment purposes.
#define __SEV | ( | ) | __ASM volatile ("sev") |
Send Event.
Send Event is a hint instruction. It causes an event to be signaled to the CPU.
#define __WFE | ( | ) | __ASM volatile ("wfe":::"memory") |
Wait For Event.
Wait For Event is a hint instruction that permits the processor to enter a low-power state until one of a number of events occurs.
#define __WFI | ( | ) | __ASM volatile ("wfi":::"memory") |
Wait For Interrupt.
Wait For Interrupt is a hint instruction that suspends execution until one of a number of events occurs.
__STATIC_FORCEINLINE uint8_t __CLZ | ( | uint32_t | value | ) |
Count leading zeros.
Counts the number of leading zeros of a data value.
[in] | value | Value to count the leading zeros |
__STATIC_FORCEINLINE void __DMB | ( | void | ) |
Data Memory Barrier.
Ensures the apparent order of the explicit memory operations before and after the instruction, without ensuring their completion.
__STATIC_FORCEINLINE void __DSB | ( | void | ) |
Data Synchronization Barrier.
Acts as a special kind of Data Memory Barrier. It completes when all explicit memory accesses before this instruction complete.
__STATIC_FORCEINLINE void __ISB | ( | void | ) |
Instruction Synchronization Barrier.
Instruction Synchronization Barrier flushes the pipeline in the processor, so that all instructions following the ISB are fetched from cache or memory, after the instruction has been completed.
__STATIC_FORCEINLINE uint32_t __RBIT | ( | uint32_t | value | ) |
Reverse bit order of value.
Reverses the bit order of the given value.
[in] | value | Value to reverse |
__STATIC_FORCEINLINE uint32_t __REV | ( | uint32_t | value | ) |
Reverse byte order (32 bit)
Reverses the byte order in unsigned integer value. For example, 0x12345678 becomes 0x78563412.
[in] | value | Value to reverse |
__STATIC_FORCEINLINE uint32_t __REV16 | ( | uint32_t | value | ) |
Reverse byte order (16 bit)
Reverses the byte order within each halfword of a word. For example, 0x12345678 becomes 0x34127856.
[in] | value | Value to reverse |
__STATIC_FORCEINLINE int16_t __REVSH | ( | int16_t | value | ) |
Reverse byte order (16 bit)
Reverses the byte order in a 16-bit value and returns the signed 16-bit result. For example, 0x0080 becomes 0x8000.
[in] | value | Value to reverse |
__STATIC_FORCEINLINE uint32_t __ROR | ( | uint32_t | op1, |
uint32_t | op2 | ||
) |
Rotate Right in unsigned value (32 bit)
Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits.
[in] | op1 | Value to rotate |
[in] | op2 | Number of Bits to rotate |
__STATIC_FORCEINLINE int32_t __SSAT | ( | int32_t | val, |
uint32_t | sat | ||
) |
Signed Saturate.
Saturates a signed value.
[in] | value | Value to be saturated |
[in] | sat | Bit position to saturate to (1..32) |
__STATIC_FORCEINLINE uint32_t __USAT | ( | int32_t | val, |
uint32_t | sat | ||
) |
Unsigned Saturate.
Saturates an unsigned value.
[in] | value | Value to be saturated |
[in] | sat | Bit position to saturate to (0..31) |