U64
DivPow10(U64 a, S64 index)
{
ASSERT(index >= 0 && index < 19);
// Generated using libdivide's reference implementation adapted to 64-bit unsigned integers.
static const struct { U64 mul; U32 shr1; U32 shr2; } kPow10Magics[19] = {
{ 0xcccccccccccccccd, 0, 3 }, // 10^1
{ 0x28f5c28f5c28f5c3, 2, 2 }, // 10^2
Loïc Molinari loicmolinari
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| /* Add extension flags to the bitfield that 'flags_out' points to. 'table' | |
| * stores extension names and flags to check for and 'extensions' is the list | |
| * usually returned by the EGL or GL implementation. New flags are stored using | |
| * a binary OR in order to keep flags set from a previous call. Caller must | |
| * ensure the bitfield is set to 0 at first call. | |
| */ | |
| void | |
| gl_extensions_add(const struct gl_extension_table *table, | |
| const char *extensions, | |
| uint64_t *flags_out) |
loicmolinari
/ boilerplate.py
Last active
March 10, 2022 16:11
Boilerplate Python script for a CLI that reads from an input file and writes to an output file with default files set to stdin and stdout and with standard option names. Provides basic support for parsing command-line parameters of different types (integers, reals, flags, positional parameters, etc).
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| #!/usr/bin/env python3 | |
| import os | |
| import sys | |
| from typing import Tuple, List, Iterator, IO, Callable, Any | |
| # Terminal ECMA-48 SGR escape sequences. | |
| ECMA48_BOLD: str = '\x1b[01m' | |
| ECMA48_RESET: str = '\x1b[00m' |
loicmolinari
/ fast_pow10_division.md
Created
May 22, 2020 13:23
Fast power-of-10 division using multiply and shift magic constants in a look-up table instead of a costly division operation.
loicmolinari
/ branch_free_4xU8_cache.md
Created
May 22, 2020 13:09
Branch free 4xU8 elements ring buffer cache
typedef struct {
U32 elements;
S32 position;
} Cache;
void
CacheInit(Cache* cache)
{
ASSERT(cache);
loicmolinari
/ wat2wasm_write_funcs_to_linking_section_symbol_table.diff
Last active
May 22, 2019 13:36
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| diff --git a/src/binary-writer.cc b/src/binary-writer.cc | |
| index 3155c206..7ffc2c6d 100644 | |
| --- a/src/binary-writer.cc | |
| +++ b/src/binary-writer.cc | |
| @@ -809,13 +809,17 @@ void BinaryWriter::WriteLinkingSection() { | |
| } | |
| } | |
| stream_->WriteU8Enum(sym.type, "symbol type"); | |
| - WriteU32Leb128(stream_, is_defined ? 0 : WABT_SYMBOL_FLAG_UNDEFINED, | |
| + WriteU32Leb128(stream_, is_defined ? |
loicmolinari
/ x86-64_asm_sheet.md
Last active
September 8, 2025 14:31
loicmolinari
/ building_ripgrep_avx.md
Last active
March 5, 2018 15:04
Building ripgrep with AVX support