Contents

static inline void
enc_loop_neon32_inner (const uint8_t **s, uint8_t **o)
{
	// Load 48 bytes and deinterleave:
	uint8x16x3_t src = vld3q_u8(*s);

	// Reshuffle:
	uint8x16x4_t out = enc_reshuffle(src);

	// Translate reshuffled bytes to the Base64 alphabet:
	out = enc_translate(out);

	// Interleave and store output:
	vst4q_u8(*o, out);

	*s += 48;
	*o += 64;
}

static inline void
enc_loop_neon32 (const uint8_t **s, size_t *slen, uint8_t **o, size_t *olen)
{
	size_t rounds = *slen / 48;

	*slen -= rounds * 48;	// 48 bytes consumed per round
	*olen += rounds * 64;	// 64 bytes produced per round

	while (rounds > 0) {
		if (rounds >= 8) {
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			rounds -= 8;
			continue;
		}
		if (rounds >= 4) {
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			rounds -= 4;
			continue;
		}
		if (rounds >= 2) {
			enc_loop_neon32_inner(s, o);
			enc_loop_neon32_inner(s, o);
			rounds -= 2;
			continue;
		}
		enc_loop_neon32_inner(s, o);
		break;
	}
}

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
ob64-0.5.0	vendor/libbase64/lib/arch/neon32/enc_loop.c