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cosmopolitan/libc/intrin/pushpop.internal.h

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Initial import
2020-06-15 14:18:57 +00:00
#ifndef COSMOPOLITAN_LIBC_BITS_PUSHPOP_H_
#define COSMOPOLITAN_LIBC_BITS_PUSHPOP_H_
Replace COSMO define with _COSMO_SOURCE This change might cause ABI breakages for /opt/cosmos. It's needed to help us better conform to header declaration practices.
2023-08-14 03:31:27 +00:00
#ifdef _COSMO_SOURCE
Remove more nonstandard stuff from cosmopolitan.h Fixes #61
2021-03-01 07:42:35 +00:00
#include "libc/macros.internal.h"
Initial import
2020-06-15 14:18:57 +00:00
Fix bugs in termios library and cleanup code This change fixes an issue with the tcflow() magic numbers that was causing bash to freeze up on Linux. While auditing termios polyfills, several other issues were identified with XNU/BSD compatibility. Out of an abundance of caution this change undefines as much surface area from libc/calls/struct/termios.h as possible, so that autoconf scripts are less likely to detect non-POSIX teletypewriter APIs that haven't been polyfilled by Cosmopolitan. This is a *breaking change* for your static archives in /opt/cosmos if you use the cosmocc toolchain. That's because this change disables the ioctl() undiamonding trick for code outside the monorepo, specifically because it'll lead to brittle ABI breakages like this. If you're using the cosmocc toolchain, you'll need to rebuild libraries like ncurses, readline, etc. Yes diamonds cause bloat. To work around that, consider using tcgetwinsize() instead of ioctl(TIOCGWINSZ) since it'll help you avoid pulling every single ioctl-related polyfill into the linkage. The cosmocc script was specifying -DNDEBUG for some reason. It's fixed.
2023-06-15 00:02:57 +00:00
#if !defined(__GNUC__) || defined(__STRICT_ANSI__) || !defined(__x86_64__) || \
!defined(__MNO_RED_ZONE__)
Auto-generate some documentation
2020-12-26 10:09:07 +00:00
#define pushpop(x) (x)
#else
Initial import
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/**
* PushPop
* An elegant weapon for a more civilized age.
*/
Make minor improvements
2020-12-24 07:42:56 +00:00
#define pushpop(x) \
({ \
typeof(x) Popped; \
if (__builtin_constant_p(x) && \
(TYPE_SIGNED(typeof(x)) ? (intptr_t)(x) + 128 < 256 \
: (intptr_t)(x) < 128)) { \
if (x) { \
asm("push\t%1\n\t" \
"pop\t%q0" \
: "=r"(Popped) \
: "ir"(x)); \
} else { \
asm("xor\t%k0,%k0" : "=r"(Popped)); \
} \
} else { \
asm("" : "=r"(Popped) : "0"(x)); \
} \
Popped; \
Initial import
2020-06-15 14:18:57 +00:00
})
#endif
Fix bugs in termios library and cleanup code This change fixes an issue with the tcflow() magic numbers that was causing bash to freeze up on Linux. While auditing termios polyfills, several other issues were identified with XNU/BSD compatibility. Out of an abundance of caution this change undefines as much surface area from libc/calls/struct/termios.h as possible, so that autoconf scripts are less likely to detect non-POSIX teletypewriter APIs that haven't been polyfilled by Cosmopolitan. This is a *breaking change* for your static archives in /opt/cosmos if you use the cosmocc toolchain. That's because this change disables the ioctl() undiamonding trick for code outside the monorepo, specifically because it'll lead to brittle ABI breakages like this. If you're using the cosmocc toolchain, you'll need to rebuild libraries like ncurses, readline, etc. Yes diamonds cause bloat. To work around that, consider using tcgetwinsize() instead of ioctl(TIOCGWINSZ) since it'll help you avoid pulling every single ioctl-related polyfill into the linkage. The cosmocc script was specifying -DNDEBUG for some reason. It's fixed.
2023-06-15 00:02:57 +00:00
#if !defined(__GNUC__) || defined(__STRICT_ANSI__) || !defined(__x86_64__) || \
!defined(__MNO_RED_ZONE__)
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 11:23:25 +00:00
#define pushmov(d, x) (*(d) = (x))
Initial import
2020-06-15 14:18:57 +00:00
#else
Make minor improvements
2020-12-24 07:42:56 +00:00
#define pushmov(d, x) \
({ \
typeof(*(d)) Popped = (x); \
if (__builtin_constant_p(x) && \
(TYPE_SIGNED(typeof(x)) ? (intptr_t)(x) + 128 < 256 \
: (intptr_t)(x) < 128)) { \
asm("pushq\t%1\n\t" \
"popq\t%0" \
: "=m"(*(d)) \
: "ir"(Popped)); \
} else { \
*(d) = Popped; \
} \
Popped; \
Initial import
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})
#endif
Replace COSMO define with _COSMO_SOURCE This change might cause ABI breakages for /opt/cosmos. It's needed to help us better conform to header declaration practices.
2023-08-14 03:31:27 +00:00
#endif /* _COSMO_SOURCE */
Initial import
2020-06-15 14:18:57 +00:00
#endif /* COSMOPOLITAN_LIBC_BITS_PUSHPOP_H_ */
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