aqrit

/*
    convert integer to ascii

    see also:
        https://johnnylee-sde.github.io/Fast-unsigned-integer-to-string/
        http://www.numberworld.org/y-cruncher/internals/radix-conversion.html
*/

#include <stdio.h>
#include <stdint.h>

aqrit

#include <stddef.h>
#include <stdint.h>


/// flags
#define SVB_NORMAL           0
#define SVB_SPECIALCASEZERO  1
#define SVB_DELTAASCENDING   2
#define SVB_DELTADESCENDING  4
#define SVB_VARSIGNEXTEND    8

aqrit

#include <stdint.h>
#include <immintrin.h>


// credit: YumiYumiYumi
// (fixed by aqrit) 
__m128i _mm_tzcnt_epi32(__m128i v) {
    __m128i mask = _mm_set1_epi32(0xffffff81);
    v = _mm_and_si128(v, _mm_sign_epi32(v, mask));
    v = _mm_castps_si128(_mm_cvtepi32_ps(v));

aqrit

/*
* various methods to strip whitespace from text
* (aka. despace, leftpack, copy_if)
*
* 'whitespace' is considered the following bytes:
* 0x09 - tab
* 0x20 - space
* 0x0A - line feed
* 0x0D - carriage return
*/

aqrit

; Base64 decoder test using SSE2 instructions
; the program doesn't do '=' chars, bad chars, or bounds checks...
;
; License: WTFPL
; by: aqrit <bitpatch.com> in 2016
;
; build instructions:
; yasm -f x64 -m AMD64 base64_decode_sse2_x64.asm
; Golink base64_decode_sse2_x64.obj kernel32.dll user32.dll
;;;;;;;;;;;;;;;;