C++ (Cpp) kfpu_begin Examples

Example #1

File: zfs_fletcher_intel.c Project: craig-sanders/zfs

static void
fletcher_4_avx2_init(zio_cksum_t *zcp)
{
    kfpu_begin();

    /* clear avx2 registers */
    asm volatile("vpxor %ymm0, %ymm0, %ymm0");
    asm volatile("vpxor %ymm1, %ymm1, %ymm1");
    asm volatile("vpxor %ymm2, %ymm2, %ymm2");
    asm volatile("vpxor %ymm3, %ymm3, %ymm3");
}

Example #2

File: zfs_fletcher_aarch64_neon.c Project: GeLiXin/zfs

static void
fletcher_4_aarch64_neon_byteswap(fletcher_4_ctx_t *ctx,
    const void *buf, uint64_t size)
{
	const uint64_t *ip = buf;
	const uint64_t *ipend = (uint64_t *)((uint8_t *)ip + size);
#if defined(_KERNEL)
register unsigned char ZERO asm("v0") __attribute__((vector_size(16)));
register unsigned char ACC0 asm("v1") __attribute__((vector_size(16)));
register unsigned char ACC1 asm("v2") __attribute__((vector_size(16)));
register unsigned char ACC2 asm("v3") __attribute__((vector_size(16)));
register unsigned char ACC3 asm("v4") __attribute__((vector_size(16)));
register unsigned char TMP1 asm("v5") __attribute__((vector_size(16)));
register unsigned char TMP2 asm("v6") __attribute__((vector_size(16)));
register unsigned char SRC asm("v7") __attribute__((vector_size(16)));
#else
unsigned char ZERO __attribute__((vector_size(16)));
unsigned char ACC0 __attribute__((vector_size(16)));
unsigned char ACC1 __attribute__((vector_size(16)));
unsigned char ACC2 __attribute__((vector_size(16)));
unsigned char ACC3 __attribute__((vector_size(16)));
unsigned char TMP1 __attribute__((vector_size(16)));
unsigned char TMP2 __attribute__((vector_size(16)));
unsigned char SRC __attribute__((vector_size(16)));
#endif

	kfpu_begin();

	NEON_INIT_LOOP();

	for (; ip < ipend; ip += 2) {
		NEON_MAIN_LOOP(NEON_DO_REVERSE);
	}

	NEON_FINI_LOOP();

	kfpu_end();
}