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Get rid of some legacy code

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Justine Tunney 2024-08-24 17:53:30 -07:00
parent 37ca1badaf
commit 38cc4b3c68
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GPG key ID: BE714B4575D6E328
27 changed files with 123 additions and 600 deletions
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29
libc/x/utf16to8.c
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@ -17,21 +17,13 @@
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/bsr.h"
#include "libc/intrin/packsswb.h"
#include "libc/intrin/pandn.h"
#include "libc/intrin/pcmpgtb.h"
#include "libc/intrin/pcmpgtw.h"
#include "libc/intrin/pmovmskb.h"
#include "libc/intrin/punpckhbw.h"
#include "libc/intrin/punpcklbw.h"
#include "libc/mem/mem.h"
#include "libc/serialize.h"
#include "libc/str/str.h"
#include "libc/str/thompike.h"
#include "libc/str/utf16.h"
#include "libc/x/x.h"
static const int16_t kDel16[8] = {127, 127, 127, 127, 127, 127, 127, 127};
#include "third_party/intel/emmintrin.internal.h"
/**
* Transcodes UTF-16 to UTF-8.
@ -45,28 +37,27 @@ char *utf16to8(const char16_t *p, size_t n, size_t *z) {
char *r, *q;
wint_t x, y;
const char16_t *e;
int16_t v1[8], v2[8], v3[8], vz[8];
if (z)
*z = 0;
if (n == -1)
n = p ? strlen16(p) : 0;
if ((q = r = malloc(n * 4 + 8 + 1))) {
for (e = p + n; p < e;) {
if (p + 8 < e) { /* 17x ascii */
bzero(vz, 16);
#if defined(__x86_64__)
if (p + 8 < e) {
do {
memcpy(v1, p, 16);
pcmpgtw(v2, v1, vz);
pcmpgtw(v3, v1, kDel16);
pandn((void *)v2, (void *)v3, (void *)v2);
if (pmovmskb((void *)v2) != 0xFFFF)
__m128i v1 = _mm_loadu_si128((__m128i *)p);
__m128i v2 = _mm_cmpgt_epi16(v1, _mm_setzero_si128());
__m128i v3 = _mm_cmpgt_epi16(v1, _mm_set1_epi16(127));
v2 = _mm_andnot_si128(v3, v2);
if (_mm_movemask_epi8(v2) != 0xFFFF)
break;
packsswb((void *)v1, v1, v1);
memcpy(q, v1, 8);
_mm_storel_epi64((__m128i *)q, _mm_packs_epi16(v1, v1));
p += 8;
q += 8;
} while (p + 8 < e);
}
#endif
x = *p++ & 0xffff;
if (!IsUcs2(x)) {
if (p < e) {