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47 lines
1.3 KiB
47 lines
1.3 KiB
/* compare256_rvv.c - RVV version of compare256 |
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* Copyright (C) 2023 SiFive, Inc. All rights reserved. |
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* Contributed by Alex Chiang <alex.chiang@sifive.com> |
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* For conditions of distribution and use, see copyright notice in zlib.h |
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*/ |
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#ifdef RISCV_RVV |
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#include "../../zbuild.h" |
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#include "fallback_builtins.h" |
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#include <riscv_vector.h> |
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static inline uint32_t compare256_rvv_static(const uint8_t *src0, const uint8_t *src1) { |
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uint32_t len = 0; |
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size_t vl; |
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long found_diff; |
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do { |
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vl = __riscv_vsetvl_e8m4(256 - len); |
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vuint8m4_t v_src0 = __riscv_vle8_v_u8m4(src0, vl); |
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vuint8m4_t v_src1 = __riscv_vle8_v_u8m4(src1, vl); |
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vbool2_t v_mask = __riscv_vmsne_vv_u8m4_b2(v_src0, v_src1, vl); |
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found_diff = __riscv_vfirst_m_b2(v_mask, vl); |
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if (found_diff >= 0) |
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return len + (uint32_t)found_diff; |
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src0 += vl, src1 += vl, len += vl; |
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} while (len < 256); |
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return 256; |
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} |
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Z_INTERNAL uint32_t compare256_rvv(const uint8_t *src0, const uint8_t *src1) { |
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return compare256_rvv_static(src0, src1); |
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} |
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#define LONGEST_MATCH longest_match_rvv |
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#define COMPARE256 compare256_rvv_static |
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#include "match_tpl.h" |
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#define LONGEST_MATCH_SLOW |
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#define LONGEST_MATCH longest_match_slow_rvv |
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#define COMPARE256 compare256_rvv_static |
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#include "match_tpl.h" |
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#endif // RISCV_RVV
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