These built-in functions are available for the RISC-V family of processors.
RISC-V intrinsic headers define macros of the form
__riscv_intrinsic_extension with the value 1 when
GCC supports intrinsics for extension. These macros indicate
compiler support for the intrinsic API and are independent of whether the
corresponding ISA extension is enabled for the current compilation unit.
Include riscv_bitmanip.h for scalar bit-manipulation intrinsics,
riscv_crypto.h for scalar cryptography intrinsics,
riscv_vector.h for vector intrinsics, and vendor intrinsic
headers for vendor intrinsic extensions.
void * __builtin_thread_pointer (void) ¶Returns the value that is currently set in the ‘tp’ register.
void __builtin_riscv_pause (void) ¶Generates the pause (hint) machine instruction. If the target implements
the Zihintpause extension, it indicates that the current hart should be
temporarily paused or slowed down.