Intrinsic Functions for Vector Instructions

Functions that generate RISC-V Vector instructions. More...

Functions
__STATIC_FORCEINLINE void	__enable_vector (void)
	Enable Vector Unit. More...
__STATIC_FORCEINLINE void	__disable_vector (void)
	Disable Vector Unit. More...

Detailed Description

Functions that generate RISC-V Vector instructions.

RISC-V Vector Intrinsic APIs are provided directly through compiler generated intrinsic function.

This intrinsic function support by compiler:

For Nuclei RISC-V GCC 10.2, it is an very old and not ratified version(no longer supported).

• API header file can be found in lib/gcc/riscv-nuclei-elf/<gcc_ver>/include/riscv_vector.h

For Nuclei RISC-V GCC 13/Clang 17, the intrinsic API supported is v0.12 version, see https://github.com/riscv-non-isa/rvv-intrinsic-doc/releases/tag/v0.12.0

For Nuclei RISC-V GCC 14.2/Clang 19, the intrinsic API supported is v0.11.x version, see https://github.com/riscv-non-isa/rvv-intrinsic-doc/tree/v0.11.x

Function Documentation

__disable_vector()

__STATIC_FORCEINLINE void __disable_vector

(

void

)

Disable Vector Unit.

Clear vector context status bits to disable vector unit

Definition at line 83 of file core_feature_vector.h.

{
    __RV_CSR_CLEAR(CSR_MSTATUS, MSTATUS_VS);
}

References __RV_CSR_CLEAR, CSR_MSTATUS, and MSTATUS_VS.

__enable_vector()

__STATIC_FORCEINLINE void __enable_vector

(

void

)

Enable Vector Unit.

Set vector context status bits to enable vector unit, and set state to initial

Definition at line 72 of file core_feature_vector.h.

{
    __RV_CSR_CLEAR(CSR_MSTATUS, MSTATUS_VS);
    __RV_CSR_SET(CSR_MSTATUS, MSTATUS_VS_INITIAL);
}

References __RV_CSR_CLEAR, __RV_CSR_SET, CSR_MSTATUS, MSTATUS_VS, and MSTATUS_VS_INITIAL.