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957c61cbbf
This change upgrades to GCC 12.3 and GNU binutils 2.42. The GNU linker appears to have changed things so that only a single de-duplicated str table is present in the binary, and it gets placed wherever the linker wants, regardless of what the linker script says. To cope with that we need to stop using .ident to embed licenses. As such, this change does significant work to revamp how third party licenses are defined in the codebase, using `.section .notice,"aR",@progbits`. This new GCC 12.3 toolchain has support for GNU indirect functions. It lets us support __target_clones__ for the first time. This is used for optimizing the performance of libc string functions such as strlen and friends so far on x86, by ensuring AVX systems favor a second codepath that uses VEX encoding. It shaves some latency off certain operations. It's a useful feature to have for scientific computing for the reasons explained by the test/libcxx/openmp_test.cc example which compiles for fifteen different microarchitectures. Thanks to the upgrades, it's now also possible to use newer instruction sets, such as AVX512FP16, VNNI. Cosmo now uses the %gs register on x86 by default for TLS. Doing it is helpful for any program that links `cosmo_dlopen()`. Such programs had to recompile their binaries at startup to change the TLS instructions. That's not great, since it means every page in the executable needs to be faulted. The work of rewriting TLS-related x86 opcodes, is moved to fixupobj.com instead. This is great news for MacOS x86 users, since we previously needed to morph the binary every time for that platform but now that's no longer necessary. The only platforms where we need fixup of TLS x86 opcodes at runtime are now Windows, OpenBSD, and NetBSD. On Windows we morph TLS to point deeper into the TIB, based on a TlsAlloc assignment, and on OpenBSD/NetBSD we morph %gs back into %fs since the kernels do not allow us to specify a value for the %gs register. OpenBSD users are now required to use APE Loader to run Cosmo binaries and assimilation is no longer possible. OpenBSD kernel needs to change to allow programs to specify a value for the %gs register, or it needs to stop marking executable pages loaded by the kernel as mimmutable(). This release fixes __constructor__, .ctor, .init_array, and lastly the .preinit_array so they behave the exact same way as glibc. We no longer use hex constants to define math.h symbols like M_PI.
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
#ifndef COSMOPOLITAN_LIBC_RUNTIME_FENV_H_
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#define COSMOPOLITAN_LIBC_RUNTIME_FENV_H_
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#ifdef __x86_64__
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#define FE_INVALID 1
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#define __FE_DENORM 2
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#define FE_DIVBYZERO 4
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#define FE_OVERFLOW 8
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#define FE_UNDERFLOW 16
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#define FE_INEXACT 32
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#define FE_ALL_EXCEPT 63
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#define FE_TONEAREST 0x0000
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#define FE_DOWNWARD 0x0400
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#define FE_UPWARD 0x0800
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#define FE_TOWARDZERO 0x0c00
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#define FE_DFL_ENV ((const fenv_t *)-1)
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typedef void *fenv_t;
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typedef uint16_t fexcept_t;
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#elif defined(__aarch64__)
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#define FE_INVALID 1
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#define FE_DIVBYZERO 2
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#define FE_OVERFLOW 4
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#define FE_UNDERFLOW 8
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#define FE_INEXACT 16
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#define FE_ALL_EXCEPT 31
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#define FE_TONEAREST 0
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#define FE_DOWNWARD 0x800000
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#define FE_UPWARD 0x400000
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#define FE_TOWARDZERO 0xc00000
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#define FE_DFL_ENV ((const fenv_t *)-1)
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typedef void *fenv_t;
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typedef uint32_t fexcept_t;
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#elif defined(__powerpc64__)
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#define FE_TONEAREST 0
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#define FE_TOWARDZERO 1
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#define FE_UPWARD 2
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#define FE_DOWNWARD 3
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#define FE_INEXACT 0x02000000
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#define FE_DIVBYZERO 0x04000000
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#define FE_UNDERFLOW 0x08000000
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#define FE_OVERFLOW 0x10000000
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#define FE_INVALID 0x20000000
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#define FE_ALL_EXCEPT 0x3e000000
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#define FE_INVALID_SNAN 0x01000000
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#define FE_INVALID_ISI 0x00800000
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#define FE_INVALID_IDI 0x00400000
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#define FE_INVALID_ZDZ 0x00200000
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#define FE_INVALID_IMZ 0x00100000
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#define FE_INVALID_COMPARE 0x00080000
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#define FE_INVALID_SOFTWARE 0x00000400
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#define FE_INVALID_SQRT 0x00000200
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#define FE_INVALID_INTEGER_CONVERSION 0x00000100
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#define FE_ALL_INVALID 0x01f80700
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#define FE_DFL_ENV ((const fenv_t *)-1)
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typedef unsigned fexcept_t;
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typedef double fenv_t;
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#endif /* __x86_64__ */
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#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
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#define FLT_EVAL_METHOD __FLT_EVAL_METHOD_TS_18661_3__
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#elif defined(__FLT_EVAL_METHOD__)
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#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
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#else
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#define FLT_EVAL_METHOD 0
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#endif
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COSMOPOLITAN_C_START_
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#define FLT_ROUNDS (__flt_rounds())
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int feclearexcept(int);
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int fegetenv(fenv_t *);
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int fegetexceptflag(fexcept_t *, int);
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int fegetround(void);
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int feholdexcept(fenv_t *);
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int feraiseexcept(int);
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int fesetenv(const fenv_t *);
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int fesetexceptflag(const fexcept_t *, int);
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int fesetround(int);
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int fetestexcept(int);
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int feupdateenv(const fenv_t *);
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int __flt_rounds(void);
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int __fesetround(int);
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_LIBC_RUNTIME_FENV_H_ */
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