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#include <stdbool.h>
#include <stddef.h>
#include <x86intrin.h>
#include "common.h"
#include "types.h"
#define MIN(x, y) ((x) < (y) ? (x) : (y))
bool
skpcmnt(const uchar **ptr, const uchar *end)
{
int nst = 1;
const uchar *p = *ptr, needles[] = {'/', '*', 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0};
const __m128i set = _mm_loadu_si128((const __m128i *)needles);
while (likely(p < end)) {
ptrdiff_t len = end - p;
size_t blksz = MIN(len, 16);
__m128i blk = _mm_loadu_si128((const __m128i *)p);
int off = _mm_cmpestri(set, 2, blk, blksz, _SIDD_CMP_EQUAL_ANY);
if (off == 16) {
p += 16;
continue;
}
if (p[off] == '*' && p[off + 1] == '/') {
p += off + 2;
if (--nst == 0) {
*ptr = p;
return true;
}
} else if (p[off] == '/' && p[off + 1] == '*') {
p += off + 2;
nst++;
} else
p += off + 1;
}
return false;
}
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