CpuFeature

Set the instruction set supported by the HMPP:
HmppResult HMPP_SetCpuFeatures (uint64_t cpuFeatures);

Obtain the instruction set supported by the CPU:
HmppResult HMPP_GetCpuFeatures (uint64_t* cpuFeatures);

Obtain the instruction set supported by the HMPP:
uint64_t HMPP_GetEnabledCpuFeatures()

Parameters

Parameter	Description	Value Range	Input/Output
cpuFeatures	Instruction set supported by the HMPP to be set (SetCpuFeatures)	Macros with the suffix _FM in the hmpp_core.h header file	Input
cpuFeatures	Pointer to the address storing the IDs of instruction set features supported by the CPU (GetCpuFeatures)	The value cannot be NULL.	Output

Return Value

HMPP_SetCpuFeatures

Success: HMPP_STS_NO_ERR
Failure: HMPP_STS_UNKNOWN_FEATURE

HMPP_GetCpuFeatures

Success: HMPP_STS_NO_ERR
Failure: HMPP_STS_NULL_PTR_ERR

HMPP_GetEnabledCpuFeatures

Number of instruction set features supported by the HMPP

Error Codes

Error Code	Description
HMPP_STS_NULL_PTR_ERR	The cpuFeatures pointer is NULL.
HMPP_STS_UNKNOWN_FEATURE	The instruction set to be set is not supported.

Note

Only the NEON_FM mode (defined in hmppcore.h) is supported.

Example

void  CpuFeature()
{
    uint64_t cpuFeatures;
    HmppResult result = HMPP_GetCpuFeatures(&cpuFeatures);
    printf("%s\n", HMPP_GetStatusString(result));
    printf("cpuFeatures = %016x\n", cpuFeatures);

    result = HMPP_SetCpuFeatures(NEON_FM);
    printf("%s\n", HMPP_GetStatusString(result));

    printf("enabledCpuFeatures = %016x\n", HMPP_GetEnabledCpuFeatures());
}

Output:

No Error
cpuFeatures = 0000000000000001
No Error
enabledCpuFeatures = 0000000000000001

Parent topic: Basic Functions