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fix failing corner case, add pshufb_maskz()

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Konstantinos Margaritis
2021-07-23 18:55:56 +03:00
parent e35b88f2c8
commit 603bc14cdd
4 changed files with 68 additions and 2 deletions
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41
src/nfa/shufti_simd.hpp
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@@ -235,6 +235,44 @@ const u8 *fwdBlockDouble(SuperVector<S> mask1_lo, SuperVector<S> mask1_hi, Super
return firstMatch<S>(buf, z);
}
template <uint16_t S>
static really_inline const u8 *shuftiDoubleMini(SuperVector<S> mask1_lo, SuperVector<S> mask1_hi, SuperVector<S> mask2_lo, SuperVector<S> mask2_hi,
const u8 *buf, const u8 *buf_end){
uintptr_t len = buf_end - buf;
assert(len < S);
const SuperVector<S> low4bits = SuperVector<S>::dup_u8(0xf);
DEBUG_PRINTF("buf %p buf_end %p \n", buf, buf_end);
SuperVector<S> chars = SuperVector<S>::loadu_maskz(buf, len);
chars.print8("chars");
SuperVector<S> chars_lo = chars & low4bits;
chars_lo.print8("chars_lo");
SuperVector<S> chars_hi = chars.rshift64(4) & low4bits;
chars_hi.print8("chars_hi");
SuperVector<S> c1_lo = mask1_lo.pshufb_maskz(chars_lo, len);
c1_lo.print8("c1_lo");
SuperVector<S> c1_hi = mask1_hi.pshufb_maskz(chars_hi, len);
c1_hi.print8("c1_hi");
SuperVector<S> t1 = c1_lo | c1_hi;
t1.print8("t1");
SuperVector<S> c2_lo = mask2_lo.pshufb_maskz(chars_lo, len);
c2_lo.print8("c2_lo");
SuperVector<S> c2_hi = mask2_hi.pshufb_maskz(chars_hi, len);
c2_hi.print8("c2_hi");
SuperVector<S> t2 = c2_lo | c2_hi;
t2.print8("t2");
t2.rshift128(1).print8("t2.rshift128(1)");
SuperVector<S> t = t1 | (t2.rshift128(1));
t.print8("t");
typename SuperVector<S>::movemask_type z = t.eqmask(SuperVector<S>::Ones());
DEBUG_PRINTF(" z: 0x%016llx\n", (u64a)z);
return firstMatch<S>(buf, z);
}
template <uint16_t S>
const u8 *shuftiDoubleExecReal(m128 mask1_lo, m128 mask1_hi, m128 mask2_lo, m128 mask2_hi,
const u8 *buf, const u8 *buf_end) {
@@ -284,8 +322,7 @@ const u8 *shuftiDoubleExecReal(m128 mask1_lo, m128 mask1_hi, m128 mask2_lo, m128
// finish off tail
if (d != buf_end) {
SuperVector<S> chars = SuperVector<S>::loadu(buf_end - S);
rv = fwdBlockDouble(wide_mask1_lo, wide_mask1_hi, wide_mask2_lo, wide_mask2_hi, chars, buf_end - S);
rv = shuftiDoubleMini(wide_mask1_lo, wide_mask1_hi, wide_mask2_lo, wide_mask2_hi, d, buf_end);
DEBUG_PRINTF("rv %p \n", rv);
if (rv >= buf && rv < buf_end) return rv;
}