Support NEON based fast forward character search in ARM64. Patch by Sebastian Pop.
This commit is contained in:
zherczeg
parent
131f75bafd
commit
2288475398
@ -5537,7 +5537,7 @@ static BOOL check_fast_forward_char_pair_simd(compiler_common *common, fast_forw
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a2 = chars[i].chars[1];
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a_pri = chars[i].last_count;
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j = i - max_fast_forward_char_pair_sse2_offset();
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j = i - max_fast_forward_char_pair_offset();
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if (j < 0)
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j = 0;
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@ -346,7 +346,7 @@ if (common->utf && offset > 0)
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#ifndef _WIN64
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static SLJIT_INLINE sljit_u32 max_fast_forward_char_pair_sse2_offset(void)
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static SLJIT_INLINE sljit_u32 max_fast_forward_char_pair_offset(void)
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{
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#if PCRE2_CODE_UNIT_WIDTH == 8
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return 15;
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@ -390,7 +390,7 @@ sljit_u8 instruction[8];
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int i;
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SLJIT_ASSERT(common->mode == PCRE2_JIT_COMPLETE && offs1 > offs2);
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SLJIT_ASSERT(diff <= IN_UCHARS(max_fast_forward_char_pair_sse2_offset()));
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SLJIT_ASSERT(diff <= IN_UCHARS(max_fast_forward_char_pair_offset()));
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SLJIT_ASSERT(tmp1_reg_ind < 8 && tmp2_reg_ind == 1);
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/* Initialize. */
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@ -631,3 +631,347 @@ if (common->match_end_ptr != 0)
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#undef SSE2_COMPARE_TYPE_INDEX
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#endif /* SLJIT_CONFIG_X86 && !SUPPORT_VALGRIND */
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#if (defined SLJIT_CONFIG_ARM_64 && SLJIT_CONFIG_ARM_64 && (defined __ARM_NEON || defined __ARM_NEON__))
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#include <arm_neon.h>
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typedef union {
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uint8_t mem[16];
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uint64_t dw[2];
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} quad_word;
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typedef union {
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unsigned int x;
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struct { unsigned char c1, c2, c3, c4; } c;
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} int_char;
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static SLJIT_INLINE void emit_memchr(struct sljit_compiler *compiler, PCRE2_UCHAR char1)
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{
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SLJIT_ASSERT(STR_PTR == SLJIT_R1);
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/* We need to be careful in the order we store argument passing registers, as STR_PTR is same as SLJIT_R1. */
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OP1(SLJIT_MOV, SLJIT_R0, 0, STR_PTR, 0);
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OP2(SLJIT_SUB, SLJIT_R2, 0, STR_END, 0, STR_PTR, 0);
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OP1(SLJIT_MOV_U8, SLJIT_R1, 0, SLJIT_IMM, char1);
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sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_RET(SW) | SLJIT_ARG1(SW) | SLJIT_ARG2(UW) | SLJIT_ARG3(UW),
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SLJIT_IMM, SLJIT_FUNC_OFFSET(memchr));
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}
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static sljit_u8* SLJIT_FUNC sljit_memchr_mask(sljit_u8 *str, sljit_uw n, sljit_u8 c1mask, sljit_u8 mask)
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{
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if (n >= 16)
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{
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quad_word qw;
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uint8x16_t vmask = vdupq_n_u8(mask);
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uint8x16_t vc1mask = vdupq_n_u8(c1mask);
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for (; n >= 16; n -= 16, str += 16)
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{
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uint8x16_t x = vld1q_u8(str);
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uint8x16_t xmask = vorrq_u8(x, vmask);
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uint8x16_t eq = vceqq_u8(xmask, vc1mask);
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vst1q_u8(qw.mem, eq);
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if (qw.dw[0])
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return str + __builtin_ctzll(qw.dw[0]) / 8;
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if (qw.dw[1])
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return str + 8 + __builtin_ctzll(qw.dw[1]) / 8;
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}
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}
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for (; n > 0; --n, ++str)
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if (c1mask == (*str | mask))
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return str;
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return NULL;
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}
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static SLJIT_INLINE void emit_memchr_mask(struct sljit_compiler *compiler, PCRE2_UCHAR char1, PCRE2_UCHAR mask, sljit_s32 offset)
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{
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OP1(SLJIT_MOV_U8, SLJIT_R2, 0, SLJIT_IMM, char1 | mask);
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OP1(SLJIT_MOV_U8, SLJIT_R3, 0, SLJIT_IMM, mask);
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sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_RET(SW) | SLJIT_ARG1(SW) | SLJIT_ARG2(UW) | SLJIT_ARG3(UW) | SLJIT_ARG4(UW),
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SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_memchr_mask));
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}
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/* Like memchr except that we are looking for either one of the two chars c1 or c2. */
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static sljit_u8* SLJIT_FUNC sljit_memchr_2(sljit_u8 *str, sljit_uw n, sljit_u8 c1, sljit_u8 c2)
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{
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if (n >= 16)
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{
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quad_word qw;
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uint8x16_t vc1 = vdupq_n_u8(c1);
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uint8x16_t vc2 = vdupq_n_u8(c2);
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for (; n >= 16; n -= 16, str += 16)
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{
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uint8x16_t x = vld1q_u8(str);
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uint8x16_t eq1 = vceqq_u8(x, vc1);
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uint8x16_t eq2 = vceqq_u8(x, vc2);
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uint8x16_t eq = vorrq_u8(eq1, eq2);
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vst1q_u8(qw.mem, eq);
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if (qw.dw[0])
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return str + __builtin_ctzll(qw.dw[0]) / 8;
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if (qw.dw[1])
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return str + 8 + __builtin_ctzll(qw.dw[1]) / 8;
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}
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}
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for (; n > 0; --n, ++str)
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{
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sljit_u8 x = *str;
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if (x == c1 || x == c2)
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return str;
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}
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return NULL;
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}
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static SLJIT_INLINE void emit_memchr_2(struct sljit_compiler *compiler, PCRE2_UCHAR char1, PCRE2_UCHAR char2)
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{
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OP1(SLJIT_MOV_U8, SLJIT_R2, 0, SLJIT_IMM, char1);
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OP1(SLJIT_MOV_U8, SLJIT_R3, 0, SLJIT_IMM, char2);
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sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_RET(SW) | SLJIT_ARG1(SW) | SLJIT_ARG2(UW) | SLJIT_ARG3(UW) | SLJIT_ARG4(UW),
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SLJIT_IMM, SLJIT_FUNC_OFFSET(sljit_memchr_2));
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}
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#if defined SUPPORT_UNICODE && PCRE2_CODE_UNIT_WIDTH != 32
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static SLJIT_INLINE int utf_continue(sljit_u8 *s)
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{
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#if PCRE2_CODE_UNIT_WIDTH == 8
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return (*s & 0xc0) == 0x80;
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#elif PCRE2_CODE_UNIT_WIDTH == 16
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return (*s & 0xfc00) == 0xdc00;
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#else
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#error "Unknown code width"
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#endif
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}
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static sljit_u8* SLJIT_FUNC exec_memchr_mask_utf(sljit_u8 *str, sljit_uw n, sljit_uw c, sljit_uw offset)
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{
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sljit_u8 c1mask, mask;
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int_char ic;
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ic.x = c;
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c1mask = ic.c.c1;
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mask = ic.c.c2;
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if (n >= 16)
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{
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quad_word qw;
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uint8x16_t vmask = vdupq_n_u8(mask);
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uint8x16_t vc1mask = vdupq_n_u8(c1mask);
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for (; n >= 16; n -= 16, str += 16)
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{
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sljit_u8 *s;
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uint8x16_t x = vld1q_u8(str);
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uint8x16_t xmask = vorrq_u8(x, vmask);
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uint8x16_t eq = vceqq_u8(xmask, vc1mask);
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vst1q_u8(qw.mem, eq);
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if (qw.dw[0] == 0 && qw.dw[1] == 0)
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continue;
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if (qw.dw[0])
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s = str + __builtin_ctzll(qw.dw[0]) / 8;
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else
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s = str + 8 + __builtin_ctzll(qw.dw[1]) / 8;
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if (utf_continue(s - offset))
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{
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/* Increment by 1 over the matching byte (i.e., -15 + 16). */
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str = s - 15;
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continue;
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}
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return s;
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}
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}
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for (; n > 0; --n, ++str)
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{
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if (c1mask != (*str | mask))
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continue;
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if (utf_continue(str - offset))
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continue;
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return str;
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}
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return NULL;
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}
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static SLJIT_INLINE void emit_memchr_mask_utf(struct sljit_compiler *compiler, PCRE2_UCHAR char1, PCRE2_UCHAR mask, sljit_s32 offset)
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{
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int_char ic;
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ic.c.c1 = char1 | mask;
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ic.c.c2 = mask;
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OP1(SLJIT_MOV, SLJIT_R2, 0, SLJIT_IMM, ic.x);
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OP1(SLJIT_MOV, SLJIT_R3, 0, SLJIT_IMM, offset);
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sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_RET(SW) | SLJIT_ARG1(SW) | SLJIT_ARG2(UW) | SLJIT_ARG3(UW) | SLJIT_ARG4(UW),
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SLJIT_IMM, SLJIT_FUNC_OFFSET(exec_memchr_mask_utf));
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}
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/* Like sljit_memchr_2 and handle utf. */
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static sljit_u8* SLJIT_FUNC exec_memchr_2_utf(sljit_u8 *str, sljit_uw n, sljit_uw c, sljit_uw offset)
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{
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sljit_u8 c1, c2;
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int_char ic;
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ic.x = c;
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c1 = ic.c.c1;
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c2 = ic.c.c2;
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if (n >= 16)
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{
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quad_word qw;
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uint8x16_t vc1 = vdupq_n_u8(c1);
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uint8x16_t vc2 = vdupq_n_u8(c2);
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for (; n >= 16; n -= 16, str += 16)
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{
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sljit_u8 *s;
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uint8x16_t x = vld1q_u8(str);
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uint8x16_t eq1 = vceqq_u8(x, vc1);
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uint8x16_t eq2 = vceqq_u8(x, vc2);
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uint8x16_t eq = vorrq_u8(eq1, eq2);
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vst1q_u8(qw.mem, eq);
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if (qw.dw[0])
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s = str + __builtin_ctzll(qw.dw[0]) / 8;
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else if (qw.dw[1])
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s = str + 8 + __builtin_ctzll(qw.dw[1]) / 8;
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else
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continue;
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if (utf_continue(s - offset))
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{
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/* Increment by 1 over the matching byte (i.e., -15 + 16). */
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str = s - 15;
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continue;
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}
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return s;
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}
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}
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for (; n > 0; --n, ++str)
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{
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sljit_u8 x = *str;
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if (x != c1 && x != c2)
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continue;
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if (utf_continue(str - offset))
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continue;
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return str;
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}
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return NULL;
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}
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static SLJIT_INLINE void emit_memchr_2_utf(struct sljit_compiler *compiler, PCRE2_UCHAR char1, PCRE2_UCHAR char2, sljit_s32 offset)
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{
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int_char ic;
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ic.c.c1 = char1;
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ic.c.c2 = char2;
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OP1(SLJIT_MOV, SLJIT_R2, 0, SLJIT_IMM, ic.x);
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OP1(SLJIT_MOV, SLJIT_R3, 0, SLJIT_IMM, offset);
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sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_RET(SW) | SLJIT_ARG1(SW) | SLJIT_ARG2(UW) | SLJIT_ARG3(UW) | SLJIT_ARG4(UW),
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SLJIT_IMM, SLJIT_FUNC_OFFSET(exec_memchr_2_utf));
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}
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/* Like memchr and handle utf. */
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static sljit_u8* SLJIT_FUNC exec_memchr_utf(sljit_u8 *str, sljit_uw n, sljit_u8 c, sljit_uw offset)
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{
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if (n >= 16)
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{
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quad_word qw;
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uint8x16_t vc = vdupq_n_u8(c);
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for (; n >= 16; n -= 16, str += 16)
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{
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sljit_u8 *s;
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uint8x16_t x = vld1q_u8(str);
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uint8x16_t eq = vceqq_u8(x, vc);
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vst1q_u8(qw.mem, eq);
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if (qw.dw[0])
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s = str + __builtin_ctzll(qw.dw[0]) / 8;
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else if (qw.dw[1])
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s = str + 8 + __builtin_ctzll(qw.dw[1]) / 8;
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else
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continue;
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if (utf_continue(s - offset))
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{
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/* Increment by 1 over the matching byte (i.e., -15 + 16). */
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str = s - 15;
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continue;
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}
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return s;
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}
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}
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for (; n > 0; --n, ++str)
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{
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if (*str != c)
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continue;
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if (utf_continue(str - offset))
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continue;
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return str;
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}
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return NULL;
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}
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static SLJIT_INLINE void emit_memchr_utf(struct sljit_compiler *compiler, PCRE2_UCHAR char1, sljit_s32 offset)
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{
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OP1(SLJIT_MOV, SLJIT_R0, 0, STR_PTR, 0);
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OP2(SLJIT_SUB, SLJIT_R1, 0, STR_END, 0, STR_PTR, 0);
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OP1(SLJIT_MOV_U8, SLJIT_R2, 0, SLJIT_IMM, char1);
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OP1(SLJIT_MOV, SLJIT_R3, 0, SLJIT_IMM, offset);
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sljit_emit_icall(compiler, SLJIT_CALL, SLJIT_RET(SW) | SLJIT_ARG1(SW) | SLJIT_ARG2(UW) | SLJIT_ARG3(UW) | SLJIT_ARG4(UW),
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SLJIT_IMM, SLJIT_FUNC_OFFSET(exec_memchr_utf));
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}
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#endif /* SUPPORT_UNICODE && PCRE2_CODE_UNIT_WIDTH != 32 */
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#define JIT_HAS_FAST_FORWARD_CHAR_SIMD 1
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static void fast_forward_char_simd(compiler_common *common, PCRE2_UCHAR char1, PCRE2_UCHAR char2, sljit_s32 offset)
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{
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DEFINE_COMPILER;
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struct sljit_jump *partial_quit;
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/* Save temporary registers. */
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OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_SP), LOCALS0, STR_PTR, 0);
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OP1(SLJIT_MOV, SLJIT_MEM1(SLJIT_SP), LOCALS1, TMP3, 0);
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if (char1 == char2)
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{
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#if defined SUPPORT_UNICODE && PCRE2_CODE_UNIT_WIDTH != 32
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if (common->utf && offset > 0)
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emit_memchr_utf(compiler, char1, offset);
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else
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emit_memchr(compiler, char1);
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#else
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emit_memchr(compiler, char1);
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#endif
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}
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else
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{
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PCRE2_UCHAR mask = char1 ^ char2;
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OP1(SLJIT_MOV, SLJIT_R0, 0, STR_PTR, 0);
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OP2(SLJIT_SUB, SLJIT_R1, 0, STR_END, 0, STR_PTR, 0);
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if (is_powerof2(mask))
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{
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#if defined SUPPORT_UNICODE && PCRE2_CODE_UNIT_WIDTH != 32
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if (common->utf && offset > 0)
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emit_memchr_mask_utf(compiler, char1, mask, offset);
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else
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emit_memchr_mask(compiler, char1, mask, offset);
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#else
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emit_memchr_mask(compiler, char1, mask, offset);
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#endif
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}
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else
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{
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#if defined SUPPORT_UNICODE && PCRE2_CODE_UNIT_WIDTH != 32
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if (common->utf && offset > 0)
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emit_memchr_2_utf(compiler, char1, char2, offset);
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else
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emit_memchr_2(compiler, char1, char2);
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#else
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emit_memchr_2(compiler, char1, char2);
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#endif
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}
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}
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/* Restore registers. */
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OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_MEM1(SLJIT_SP), LOCALS0);
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OP1(SLJIT_MOV, TMP3, 0, SLJIT_MEM1(SLJIT_SP), LOCALS1);
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/* Check return value. */
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partial_quit = CMP(SLJIT_EQUAL, SLJIT_RETURN_REG, 0, SLJIT_IMM, 0);
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if (common->mode == PCRE2_JIT_COMPLETE)
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add_jump(compiler, &common->failed_match, partial_quit);
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/* Fast forward STR_PTR to the result of memchr. */
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OP1(SLJIT_MOV, STR_PTR, 0, SLJIT_RETURN_REG, 0);
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if (common->mode != PCRE2_JIT_COMPLETE)
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JUMPHERE(partial_quit);
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}
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#endif /* SLJIT_CONFIG_ARM_64 && SLJIT_CONFIG_ARM_64 */
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