Functions that generate specific Cortex-A CPU Instructions.
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| uint32_t | __REV (uint32_t value) |
| | Reverse byte order (32 bit) More...
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| uint16_t | __REV16 (uint16_t value) |
| | Reverse byte order (16 bit) More...
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| int32_t | __REVSH (int32_t value) |
| | Reverse byte order (16 bit) More...
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| uint32_t | __ROR (uint32_t op1, uint32_t op2) |
| | Rotate Right in unsigned value (32 bit) More...
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| uint32_t | __RBIT (uint32_t value) |
| | Reverse bit order of value. More...
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| uint8_t | __CLZ (uint32_t value) |
| | Count leading zeros. More...
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| #define __BKPT |
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value | ) |
__breakpoint(value) |
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.
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.
- Parameters
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| [in] | value | is ignored by the processor. If required, a debugger can use it to store additional information about the breakpoint. |
| #define __DMB |
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__dmb(0xF) |
Ensures the apparent order of the explicit memory operations before and after the instruction, without ensuring their completion.
| #define __DSB |
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__dsb(0xF) |
Acts as a special kind of Data Memory Barrier. It completes when all explicit memory accesses before this instruction complete.
| #define __ISB |
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__isb(0xF) |
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.
No Operation does nothing. This instruction can be used for code alignment purposes.
Send Event is a hint instruction. It causes an event to be signaled to the CPU.
Wait For Event is a hint instruction that permits the processor to enter
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.
Wait For Interrupt is a hint instruction that suspends execution until one of a number of events occurs.
| uint8_t __CLZ |
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uint32_t |
value | ) |
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Counts the number of leading zeros of a data value.
- Parameters
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| [in] | value | Value to count the leading zeros |
- Returns
- number of leading zeros in value
| uint32_t __RBIT |
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uint32_t |
value | ) |
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Reverses the bit order of the given value.
- Parameters
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| [in] | value | Value to reverse |
- Returns
- Reversed value
| uint32_t __REV |
( |
uint32_t |
value | ) |
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Reverses the byte order in unsigned integer value. For example, 0x12345678 becomes 0x78563412.
- Parameters
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| [in] | value | Value to reverse |
- Returns
- Reversed value
| uint16_t __REV16 |
( |
uint16_t |
value | ) |
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Reverses the byte order within each halfword of a word. For example, 0x12345678 becomes 0x34127856.
- Parameters
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| [in] | value | Value to reverse |
- Returns
- Reversed value
| int32_t __REVSH |
( |
int32_t |
value | ) |
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Reverses the byte order in a 16-bit value and returns the signed 16-bit result. For example, 0x0080 becomes 0x8000.
- Parameters
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| [in] | value | Value to reverse |
- Returns
- Reversed value
| uint32_t __ROR |
( |
uint32_t |
op1, |
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uint32_t |
op2 |
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) |
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Rotate Right (immediate) provides the value of the contents of a register rotated by a variable number of bits.
- Parameters
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| [in] | op1 | Value to rotate |
| [in] | op2 | Number of Bits to rotate |
- Returns
- Rotated value
