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7.13.12.2 Directly-mapped Builtin Functions ¶

The intrinsics provided are listed below:

    unsigned int __builtin_loongarch_movfcsr2gr (imm0_31)    void __builtin_loongarch_movgr2fcsr (imm0_31, unsigned int)    void __builtin_loongarch_cacop_d (imm0_31, unsigned long int, imm_n2048_2047)    unsigned int __builtin_loongarch_cpucfg (unsigned int)    void __builtin_loongarch_asrtle_d (long int, long int)    void __builtin_loongarch_asrtgt_d (long int, long int)    long int __builtin_loongarch_lddir_d (long int, imm0_31)    void __builtin_loongarch_ldpte_d (long int, imm0_31)    int __builtin_loongarch_crc_w_b_w (char, int)    int __builtin_loongarch_crc_w_h_w (short, int)    int __builtin_loongarch_crc_w_w_w (int, int)    int __builtin_loongarch_crc_w_d_w (long int, int)    int __builtin_loongarch_crcc_w_b_w (char, int)    int __builtin_loongarch_crcc_w_h_w (short, int)    int __builtin_loongarch_crcc_w_w_w (int, int)    int __builtin_loongarch_crcc_w_d_w (long int, int)    unsigned int __builtin_loongarch_csrrd_w (imm0_16383)    unsigned int __builtin_loongarch_csrwr_w (unsigned int, imm0_16383)    unsigned int __builtin_loongarch_csrxchg_w (unsigned int, unsigned int, imm0_16383)    unsigned long int __builtin_loongarch_csrrd_d (imm0_16383)    unsigned long int __builtin_loongarch_csrwr_d (unsigned long int, imm0_16383)    unsigned long int __builtin_loongarch_csrxchg_d (unsigned long int, unsigned long int, imm0_16383)    unsigned char __builtin_loongarch_iocsrrd_b (unsigned int)    unsigned short __builtin_loongarch_iocsrrd_h (unsigned int)    unsigned int __builtin_loongarch_iocsrrd_w (unsigned int)    unsigned long int __builtin_loongarch_iocsrrd_d (unsigned int)    void __builtin_loongarch_iocsrwr_b (unsigned char, unsigned int)    void __builtin_loongarch_iocsrwr_h (unsigned short, unsigned int)    void __builtin_loongarch_iocsrwr_w (unsigned int, unsigned int)    void __builtin_loongarch_iocsrwr_d (unsigned long int, unsigned int)    void __builtin_loongarch_dbar (imm0_32767)    void __builtin_loongarch_ibar (imm0_32767)    void __builtin_loongarch_syscall (imm0_32767)    void __builtin_loongarch_break (imm0_32767)

These intrinsic functions are available by using-mfrecipe.

    float __builtin_loongarch_frecipe_s (float);    double  __builtin_loongarch_frecipe_d (double);    float __builtin_loongarch_frsqrte_s (float);    double  __builtin_loongarch_frsqrte_d (double);

Note:Since the control register is divided into 32-bit and 64-bit,but the access instruction is not distinguished. So GCC renames the controlinstructions when implementing intrinsics.

Take the csrrd instruction as an example, built-in functions are implemented as follows:

  __builtin_loongarch_csrrd_w  // When reading the 32-bit control register use.  __builtin_loongarch_csrrd_d  // When reading the 64-bit control register use.

For the convenience of use, the built-in functions are encapsulated,the encapsulated functions and__drdtime_t, __rdtime_t aredefined in thelarchintrin.h. So if you call the followingfunction you need to includelarchintrin.h.

     typedef struct drdtime{            unsigned long dvalue;            unsigned long dtimeid;     } __drdtime_t;     typedef struct rdtime{            unsigned int value;            unsigned int timeid;     } __rdtime_t;

    __drdtime_t __rdtime_d (void)    __rdtime_t  __rdtimel_w (void)    __rdtime_t  __rdtimeh_w (void)    unsigned int  __movfcsr2gr (imm0_31)    void __movgr2fcsr (imm0_31, unsigned int)    void __cacop_d (imm0_31, unsigned long, imm_n2048_2047)    unsigned int  __cpucfg (unsigned int)    void __asrtle_d (long int, long int)    void __asrtgt_d (long int, long int)    long int  __lddir_d (long int, imm0_31)    void __ldpte_d (long int, imm0_31)    int  __crc_w_b_w (char, int)    int  __crc_w_h_w (short, int)    int  __crc_w_w_w (int, int)    int  __crc_w_d_w (long int, int)    int  __crcc_w_b_w (char, int)    int  __crcc_w_h_w (short, int)    int  __crcc_w_w_w (int, int)    int  __crcc_w_d_w (long int, int)    unsigned int  __csrrd_w (imm0_16383)    unsigned int  __csrwr_w (unsigned int, imm0_16383)    unsigned int  __csrxchg_w (unsigned int, unsigned int, imm0_16383)    unsigned long  __csrrd_d (imm0_16383)    unsigned long  __csrwr_d (unsigned long, imm0_16383)    unsigned long  __csrxchg_d (unsigned long, unsigned long, imm0_16383)    unsigned char   __iocsrrd_b (unsigned int)    unsigned short  __iocsrrd_h (unsigned int)    unsigned int  __iocsrrd_w (unsigned int)    unsigned long  __iocsrrd_d (unsigned int)    void __iocsrwr_b (unsigned char, unsigned int)    void __iocsrwr_h (unsigned short, unsigned int)    void __iocsrwr_w (unsigned int, unsigned int)    void __iocsrwr_d (unsigned long, unsigned int)    void __dbar (imm0_32767)    void __ibar (imm0_32767)    void __syscall (imm0_32767)    void __break (imm0_32767)