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cosmopolitan/libc/intrin/bsf.h

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Rename _bsr/_bsf to bsr/bsf Now that these functions are behind _COSMO_SOURCE there's no reason for having the ugly underscore anymore. To use these functions, you need to pass -mcosmo to cosmocc.
2024-03-04 17:33:26 -08:00
#ifdef _COSMO_SOURCE
Initial import
2020-06-15 07:18:57 -07:00
#ifndef COSMOPOLITAN_LIBC_NEXGEN32E_BSF_H_
#define COSMOPOLITAN_LIBC_NEXGEN32E_BSF_H_
COSMOPOLITAN_C_START_
Rename _bsr/_bsf to bsr/bsf Now that these functions are behind _COSMO_SOURCE there's no reason for having the ugly underscore anymore. To use these functions, you need to pass -mcosmo to cosmocc.
2024-03-04 17:33:26 -08:00
libcesque int bsf(int) pureconst;
libcesque int bsfl(long) pureconst;
libcesque int bsfll(long long) pureconst;
Add pseudoteletypewriter to emulator https://justine.storage.googleapis.com/emulator628.mp4
2020-08-26 23:08:08 -07:00
Improve performance of bitscanning intrinsics This change helps spectre more intelligently plan execution, by working around false output dependencies, impacting ops like popcnt bsr and bsf
2021-06-15 06:24:46 -07:00
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
Rename _bsr/_bsf to bsr/bsf Now that these functions are behind _COSMO_SOURCE there's no reason for having the ugly underscore anymore. To use these functions, you need to pass -mcosmo to cosmocc.
2024-03-04 17:33:26 -08:00
#define bsf(x) __builtin_ctz(x)
#define bsfl(x) __builtin_ctzl(x)
#define bsfll(x) __builtin_ctzll(x)
Make progress towards aarch64 build
2023-05-01 19:43:59 -07:00
#endif
Add x86_64-linux-gnu emulator I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
2020-08-25 04:23:25 -07:00
Add deprecated stubs for _bsf / _bsr
2024-03-05 09:45:51 -08:00
/* deprecated */
#define _bsf(x) bsf(x)
#define _bsfl(x) bsfl(x)
#define _bsfll(x) bsfll(x)
Initial import
2020-06-15 07:18:57 -07:00
COSMOPOLITAN_C_END_
#endif /* COSMOPOLITAN_LIBC_NEXGEN32E_BSF_H_ */
Rename _bsr/_bsf to bsr/bsf Now that these functions are behind _COSMO_SOURCE there's no reason for having the ugly underscore anymore. To use these functions, you need to pass -mcosmo to cosmocc.
2024-03-04 17:33:26 -08:00
#endif /* _COSMO_SOURCE */
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