x86_32.h

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/*
 * Copyright © 2025, Niklas Haas
 * Copyright © 2018, VideoLAN and dav1d authors
 * Copyright © 2018, Two Orioles, LLC
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef CHECKASM_PLATFORM_X86_32_H
#define CHECKASM_PLATFORM_X86_32_H
 
#include "checkasm/attributes.h"
#include "checkasm/checkasm.h"
 
CHECKASM_API void checkasm_checked_call(void *func, ...);
CHECKASM_API void checkasm_checked_call_float(void *func, ...);
CHECKASM_API void checkasm_checked_call_emms(void *func, ...);
 
CHECKASM_API void checkasm_empty_mmx(void);
 
#if CHECKASM_HAVE_GENERIC
  #define checked_call_fn(ret)                                                           \
      _Generic((ret (*)(void)) NULL,                                                     \
          float (*)(void): checkasm_checked_call_float,                                  \
          double (*)(void): checkasm_checked_call_float,                                 \
          default: checkasm_checked_call)
#else
  /* Always use float version to not trigger false positives */
  #define checked_call_fn(ret) checkasm_checked_call_float
#endif
 
#define checkasm_declare_impl(ret, ...)                                                  \
    ret (*checked_call)(void *, __VA_ARGS__, int, int, int, int, int, int, int, int,     \
                        int, int, int, int, int, int, int)                               \
        = (ret (*)(void *, __VA_ARGS__, int, int, int, int, int, int, int, int, int,     \
                   int, int, int, int, int, int))(void *) checked_call_fn(ret);          \
    int emms_needed = 0;                                                                 \
    (void) emms_needed
 
#define checkasm_call_checked(func, ...)                                                 \
    (checkasm_set_signal_handler_state(1),                                               \
     checked_call(func, __VA_ARGS__, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2,     \
                  1));                                                                   \
    checkasm_set_signal_handler_state(0)
 
#define checkasm_declare_emms(cpu_flags, ret, ...)                                       \
    checkasm_declare(ret, __VA_ARGS__);                                                  \
    if (checkasm_get_cpu_flags() & (cpu_flags)) {                                        \
        checked_call = (ret (*)(void *, __VA_ARGS__, int, int, int, int, int, int, int,  \
                                int, int, int, int, int, int, int,                       \
                                int))(void *) checkasm_checked_call_emms;                \
        emms_needed  = 1;                                                                \
    }
 
#if defined(__GNUC__) || defined(__clang__)
  #define checkasm_emms() __asm__ volatile("emms" ::: "memory")
#else
  #define checkasm_emms() checkasm_empty_mmx()
#endif
 
#define checkasm_clear_cpu_state()                                                       \
    do {                                                                                 \
        if (emms_needed)                                                                 \
            checkasm_emms();                                                             \
    } while (0)
 
#define CHECKASM_ALIGNMENT 64
 
#endif /* CHECKASM_PLATFORM_X86_32_H */