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#if (defined(__ARM_NEON) && !defined(__ARM_NEON__))
#define __ARM_NEON__
#endif
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#ifdef __ARM_NEON__
#include <arm_neon.h>
#endif
#include "libbase64.h"
#include "codecs.h"
#if (defined(__aarch64__) && defined(__ARM_NEON__))
#define CMPGT(s,n) vcgtq_u8((s), vdupq_n_u8(n))
#define CMPEQ(s,n) vceqq_u8((s), vdupq_n_u8(n))
#define REPLACE(s,n) vandq_u8((s), vdupq_n_u8(n))
#define RANGE(s,a,b) vandq_u8(vcgeq_u8((s), vdupq_n_u8(a)), vcleq_u8((s), vdupq_n_u8(b)))
// With this transposed encoding table, we can use
// a 64-byte lookup to do the encoding.
// Read the table top to bottom, left to right.
static const char *neon64_base64_table_enc_transposed =
{
"AQgw"
"BRhx"
"CSiy"
"DTjz"
"EUk0"
"FVl1"
"GWm2"
"HXn3"
"IYo4"
"JZp5"
"Kaq6"
"Lbr7"
"Mcs8"
"Ndt9"
"Oeu+"
"Pfv/"
};
#endif
// Stride size is so large on these NEON 64-bit functions
// (48 bytes encode, 64 bytes decode) that we inline the
// uint64 codec to stay performant on smaller inputs.
void
neon64_base64_stream_encode
( struct neon64_base64_state *state
, const char *src
, size_t srclen
, char *out
, size_t *outlen
)
{
#if (defined(__aarch64__) && defined(__ARM_NEON__))
uint8x16x4_t tbl_enc = vld4q_u8((uint8_t const*)neon64_base64_table_enc_transposed);
#include "enc_head.c"
#include "enc_neon.c"
#include "enc_uint64.c"
#include "enc_tail.c"
#else
(void)state;
(void)src;
(void)srclen;
(void)out;
(void)outlen;
abort();
#endif
}
int
neon64_base64_stream_decode
( struct neon64_base64_state *state
, const char *src
, size_t srclen
, char *out
, size_t *outlen
)
{
#if (defined(__aarch64__) && defined(__ARM_NEON__))
#include "dec_head.c"
#include "dec_neon.c"
#include "dec_uint64.c"
#include "dec_tail.c"
#else
(void)state;
(void)src;
(void)srclen;
(void)out;
(void)outlen;
abort();
#endif
}
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