Revert "tolower/toupper avx2"

This reverts commit 7d76490.

Author: bilam

jsrc/str.c

@@ -131,72 +131,7 @@ static size_t srchr4(unsigned int* str, unsigned int ch, size_t len){
  return 0;
 }
 
-#if C_AVX2 || EMU_AVX2
-
-/* A SIMD function for SSE2 which changes all uppercase ASCII digits to lowercase. */
-void StringToLower(char *str,size_t len){
- while (len >= 32) {
-  __m256i sv = _mm256_loadu_si256(( __m256i*)str);
-  /* From A */
-  __m256i rangeshift = _mm256_sub_epi8(sv, _mm256_set1_epi8((char)('A'+256)));
-  /* To Z */
-  __m256i nomodify = _mm256_cmpgt_epi8(rangeshift, _mm256_set1_epi8(-256 + 25));
-  /* ^ ' ' */
-  _mm_storeu_si256((__m256i*)str, _mm256_xor_si256(sv, _mm256_andnot_si256(nomodify, _mm256_set1_epi8(0x20))));
-  len -= 32;
-  str += 32;
- }
- while (len >= 16) {
-  __m128i sv = _mm_loadu_si128(( __m128i*)str);
-  /* From A */
-  __m128i rangeshift = _mm_sub_epi8(sv, _mm_set1_epi8((char)('A'+128)));
-  /* To Z */
-  __m128i nomodify = _mm_cmpgt_epi8(rangeshift, _mm_set1_epi8(-128 + 25));
-  /* ^ ' ' */
-  _mm_storeu_si128((__m128i*)str, _mm_xor_si128(sv, _mm_andnot_si128(nomodify, _mm_set1_epi8(0x20))));
-  len -= 16;
-  str += 16;
- }
- while (len-- > 0) {
-  *str = tolower(*str);
-  ++str;
- }
-}
-
-/* Same, but to uppercase. */
-void StringToUpper(char *str,size_t len){
- while (len >= 32) {
- // Unaligned load.
- __m256i r0 = _mm256_loadu_si256((__m256i*)str);
- // It is also possible to perform aligned loads by skipping enough characters in the front
-
- // maskaz contains 0x00 where character between 'a' and 'z', 0xff otherwise.
- __m256i maskaz = _mm256_or_si256(_mm256_cmplt_epi8(r0, _mm256_set1_epi8( 'a' )), _mm256_cmpgt_epi8(r0, _mm256_set1_epi8( 'z' )));
-
- // Set the 6th bit to 0 only for lowercase characters.
- _mm_storeu_si256((__m256i*)str, _mm256_andnot_si256(_mm256_andnot_si256(maskaz, _mm256_set1_epi8(0x20)),r0));
-  len -= 32;
-  str += 32;
- }
- while (len >= 16) {
- // Unaligned load.
- __m128i r0 = _mm_loadu_si128((__m128i*)str);
- // It is also possible to perform aligned loads by skipping enough characters in the front
-
- // maskaz contains 0x00 where character between 'a' and 'z', 0xff otherwise.
- __m128i maskaz = _mm_or_si128(_mm_cmplt_epi8(r0, _mm_set1_epi8( 'a' )), _mm_cmpgt_epi8(r0, _mm_set1_epi8( 'z' )));
-
- // Set the 6th bit to 0 only for lowercase characters.
- _mm_storeu_si128((__m128i*)str, _mm_andnot_si128(_mm_andnot_si128(maskaz, _mm_set1_epi8(0x20)),r0));
-  len -= 16;
-  str += 16;
- }
- while (len-- > 0) {
-  *str = toupper(*str);
-  ++str;
- }
-}
-#elif defined(__SSE2__) || EMU_AVX
+#if defined(__SSE2__) || EMU_AVX
 
 /* A SIMD function for SSE2 which changes all uppercase ASCII digits to lowercase. */
 void StringToLower(char *str,size_t len){