ref: 3fade2b967f043617a868cc5ea942f0b276732d5
dir: /tests/checkasm/checkasm.h/
/*
* 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 DAV1D_TESTS_CHECKASM_CHECKASM_H
#define DAV1D_TESTS_CHECKASM_CHECKASM_H
#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#if ARCH_X86_64 && defined(_WIN32)
/* setjmp/longjmp on 64-bit Windows will try to use SEH to unwind the stack,
* which doesn't work for assembly functions without unwind information. */
#include <windows.h>
#define checkasm_context CONTEXT
#define checkasm_save_context() RtlCaptureContext(&checkasm_context_buf)
#define checkasm_load_context() RtlRestoreContext(&checkasm_context_buf, NULL)
#else
#include <setjmp.h>
#define checkasm_context jmp_buf
#define checkasm_save_context() setjmp(checkasm_context_buf)
#define checkasm_load_context() longjmp(checkasm_context_buf, 1)
#endif
#include "include/common/attributes.h"
#include "include/common/intops.h"
int xor128_rand(void);
#define rnd xor128_rand
#define decl_check_bitfns(name) \
name##_8bpc(void); \
name##_16bpc(void)
decl_check_bitfns(void checkasm_check_cdef);
decl_check_bitfns(void checkasm_check_ipred);
decl_check_bitfns(void checkasm_check_itx);
decl_check_bitfns(void checkasm_check_loopfilter);
decl_check_bitfns(void checkasm_check_looprestoration);
decl_check_bitfns(void checkasm_check_mc);
void *checkasm_check_func(void *func, const char *name, ...);
int checkasm_bench_func(void);
void checkasm_fail_func(const char *msg, ...);
void checkasm_update_bench(int iterations, uint64_t cycles);
void checkasm_report(const char *name, ...);
void checkasm_set_signal_handler_state(int enabled);
extern checkasm_context checkasm_context_buf;
/* float compare utilities */
int float_near_ulp(float a, float b, unsigned max_ulp);
int float_near_abs_eps(float a, float b, float eps);
int float_near_abs_eps_ulp(float a, float b, float eps, unsigned max_ulp);
int float_near_ulp_array(const float *a, const float *b, unsigned max_ulp,
int len);
int float_near_abs_eps_array(const float *a, const float *b, float eps,
int len);
int float_near_abs_eps_array_ulp(const float *a, const float *b, float eps,
unsigned max_ulp, int len);
static void *func_ref, *func_new;
#define BENCH_RUNS (1 << 12) /* Trade-off between accuracy and speed */
/* Decide whether or not the specified function needs to be tested */
#define check_func(func, ...)\
(func_ref = checkasm_check_func((func_new = func), __VA_ARGS__))
/* Declare the function prototype. The first argument is the return value,
* the remaining arguments are the function parameters. Naming parameters
* is optional. */
#define declare_func(ret, ...)\
declare_new(ret, __VA_ARGS__)\
typedef ret func_type(__VA_ARGS__);\
checkasm_save_context()
/* Indicate that the current test has failed */
#define fail() checkasm_fail_func("%s:%d", __FILE__, __LINE__)
/* Print the test outcome */
#define report checkasm_report
/* Call the reference function */
#define call_ref(...)\
(checkasm_set_signal_handler_state(1),\
((func_type *)func_ref)(__VA_ARGS__));\
checkasm_set_signal_handler_state(0)
#if HAVE_ASM
#if ARCH_X86
#ifdef _MSC_VER
#include <intrin.h>
#define readtime() (_mm_lfence(), __rdtsc())
#else
static inline uint64_t readtime(void) {
uint32_t eax, edx;
__asm__ __volatile__("lfence\nrdtsc" : "=a"(eax), "=d"(edx));
return (((uint64_t)edx) << 32) | eax;
}
#define readtime readtime
#endif
#elif ARCH_AARCH64
#ifdef _MSC_VER
#include <windows.h>
#define readtime() (_InstructionSynchronizationBarrier(), ReadTimeStampCounter())
#else
static inline uint64_t readtime(void) {
uint64_t cycle_counter;
/* This requires enabling user mode access to the cycle counter (which
* can only be done from kernel space).
* This could also read cntvct_el0 instead of pmccntr_el0; that register
* might also be readable (depending on kernel version), but it has much
* worse precision (it's a fixed 50 MHz timer). */
__asm__ __volatile__("isb\nmrs %0, pmccntr_el0"
: "=r"(cycle_counter)
:: "memory");
return cycle_counter;
}
#define readtime readtime
#endif
#elif ARCH_ARM && !defined(_MSC_VER)
static inline uint64_t readtime(void) {
uint32_t cycle_counter;
/* This requires enabling user mode access to the cycle counter (which
* can only be done from kernel space). */
__asm__ __volatile__("isb\nmrc p15, 0, %0, c9, c13, 0"
: "=r"(cycle_counter)
:: "memory");
return cycle_counter;
}
#define readtime readtime
#endif
/* Verifies that clobbered callee-saved registers
* are properly saved and restored */
void checkasm_checked_call(void *func, ...);
#if ARCH_X86_64
/* Evil hack: detect incorrect assumptions that 32-bit ints are zero-extended
* to 64-bit. This is done by clobbering the stack with junk around the stack
* pointer and calling the assembly function through checked_call() with added
* dummy arguments which forces all real arguments to be passed on the stack
* and not in registers. For 32-bit arguments the upper half of the 64-bit
* register locations on the stack will now contain junk which will cause
* misbehaving functions to either produce incorrect output or segfault. Note
* that even though this works extremely well in practice, it's technically
* not guaranteed and false negatives is theoretically possible, but there
* can never be any false positives. */
void checkasm_stack_clobber(uint64_t clobber, ...);
#define declare_new(ret, ...)\
ret (*checked_call)(void *, int, int, int, int, int, __VA_ARGS__) =\
(void *)checkasm_checked_call;
#define CLOB (UINT64_C(0xdeadbeefdeadbeef))
#define call_new(...)\
(checkasm_set_signal_handler_state(1),\
checkasm_stack_clobber(CLOB, CLOB, CLOB, CLOB, CLOB, CLOB, CLOB,\
CLOB, CLOB, CLOB, CLOB, CLOB, CLOB, CLOB,\
CLOB, CLOB, CLOB, CLOB, CLOB, CLOB, CLOB),\
checked_call(func_new, 0, 0, 0, 0, 0, __VA_ARGS__));\
checkasm_set_signal_handler_state(0)
#elif ARCH_X86_32
#define declare_new(ret, ...)\
ret (*checked_call)(void *, __VA_ARGS__) = (void *)checkasm_checked_call;
#define call_new(...)\
(checkasm_set_signal_handler_state(1),\
checked_call(func_new, __VA_ARGS__));\
checkasm_set_signal_handler_state(0)
#elif ARCH_ARM
/* Use a dummy argument, to offset the real parameters by 2, not only 1.
* This makes sure that potential 8-byte-alignment of parameters is kept
* the same even when the extra parameters have been removed. */
void checkasm_checked_call_vfp(void *func, int dummy, ...);
#define declare_new(ret, ...)\
ret (*checked_call)(void *, int dummy, __VA_ARGS__) =\
(void *)checkasm_checked_call_vfp;
#define call_new(...)\
(checkasm_set_signal_handler_state(1),\
checked_call(func_new, 0, __VA_ARGS__));\
checkasm_set_signal_handler_state(0)
#elif ARCH_AARCH64 && !defined(__APPLE__)
void checkasm_stack_clobber(uint64_t clobber, ...);
#define declare_new(ret, ...)\
ret (*checked_call)(void *, int, int, int, int, int, int, int,\
__VA_ARGS__) =\
(void *)checkasm_checked_call;
#define CLOB (UINT64_C(0xdeadbeefdeadbeef))
#define call_new(...)\
(checkasm_set_signal_handler_state(1),\
checkasm_stack_clobber(CLOB, CLOB, CLOB, CLOB, CLOB, CLOB,\
CLOB, CLOB, CLOB, CLOB, CLOB, CLOB,\
CLOB, CLOB, CLOB, CLOB, CLOB, CLOB,\
CLOB, CLOB, CLOB, CLOB, CLOB),\
checked_call(func_new, 0, 0, 0, 0, 0, 0, 0, __VA_ARGS__));\
checkasm_set_signal_handler_state(0)
#else
#define declare_new(ret, ...)
#define call_new(...)\
(checkasm_set_signal_handler_state(1),\
((func_type *)func_new)(__VA_ARGS__));\
checkasm_set_signal_handler_state(0)
#endif
#else /* HAVE_ASM */
#define declare_new(ret, ...)
/* Call the function */
#define call_new(...)\
(checkasm_set_signal_handler_state(1),\
((func_type *)func_new)(__VA_ARGS__));\
checkasm_set_signal_handler_state(0)
#endif /* HAVE_ASM */
/* Benchmark the function */
#ifdef readtime
#define bench_new(...)\
do {\
if (checkasm_bench_func()) {\
checkasm_set_signal_handler_state(1);\
func_type *tfunc = func_new;\
uint64_t tsum = 0;\
int ti, tcount = 0;\
for (ti = 0; ti < BENCH_RUNS; ti++) {\
uint64_t t = readtime();\
tfunc(__VA_ARGS__);\
tfunc(__VA_ARGS__);\
tfunc(__VA_ARGS__);\
tfunc(__VA_ARGS__);\
t = readtime() - t;\
if (t*tcount <= tsum*4 && ti > 0) {\
tsum += t;\
tcount++;\
}\
}\
checkasm_set_signal_handler_state(0);\
checkasm_update_bench(tcount, tsum);\
}\
} while (0)
#else
#define bench_new(...) while (0)
#endif
#endif /* DAV1D_TESTS_CHECKASM_CHECKASM_H */