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78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
#include <stdint.h>
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#include <stddef.h>
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#include <string.h>
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#include "../../../include/libbase64.h"
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#include "../../tables/tables.h"
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#include "../../codecs.h"
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#include "config.h"
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#include "../../env.h"
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#ifdef __arm__
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# if (defined(__ARM_NEON__) || defined(__ARM_NEON)) && HAVE_NEON32
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# define BASE64_USE_NEON32
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# endif
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#endif
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#ifdef BASE64_USE_NEON32
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#include <arm_neon.h>
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// Only enable inline assembly on supported compilers.
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#if defined(__GNUC__) || defined(__clang__)
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#define BASE64_NEON32_USE_ASM
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#endif
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static inline uint8x16_t
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vqtbl1q_u8 (const uint8x16_t lut, const uint8x16_t indices)
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{
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// NEON32 only supports 64-bit wide lookups in 128-bit tables. Emulate
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// the NEON64 `vqtbl1q_u8` intrinsic to do 128-bit wide lookups.
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uint8x8x2_t lut2;
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uint8x8x2_t result;
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lut2.val[0] = vget_low_u8(lut);
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lut2.val[1] = vget_high_u8(lut);
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result.val[0] = vtbl2_u8(lut2, vget_low_u8(indices));
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result.val[1] = vtbl2_u8(lut2, vget_high_u8(indices));
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return vcombine_u8(result.val[0], result.val[1]);
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}
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#include "../generic/32/dec_loop.c"
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#include "../generic/32/enc_loop.c"
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#include "dec_loop.c"
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#include "enc_reshuffle.c"
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#include "enc_translate.c"
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#include "enc_loop.c"
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#endif // BASE64_USE_NEON32
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// Stride size is so large on these NEON 32-bit functions
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// (48 bytes encode, 32 bytes decode) that we inline the
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// uint32 codec to stay performant on smaller inputs.
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BASE64_ENC_FUNCTION(neon32)
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{
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#ifdef BASE64_USE_NEON32
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#include "../generic/enc_head.c"
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enc_loop_neon32(&s, &slen, &o, &olen);
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enc_loop_generic_32(&s, &slen, &o, &olen);
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#include "../generic/enc_tail.c"
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#else
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BASE64_ENC_STUB
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#endif
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}
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BASE64_DEC_FUNCTION(neon32)
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{
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#ifdef BASE64_USE_NEON32
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#include "../generic/dec_head.c"
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dec_loop_neon32(&s, &slen, &o, &olen);
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dec_loop_generic_32(&s, &slen, &o, &olen);
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#include "../generic/dec_tail.c"
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#else
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BASE64_DEC_STUB
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#endif
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}
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