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Rev	Author	Line No.	Line
1901	serge	1	/*
		2	* Mesa 3-D graphics library
		3	* Version: 6.1
		4	*
		5	* Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
		6	*
		7	* Permission is hereby granted, free of charge, to any person obtaining a
		8	* copy of this software and associated documentation files (the "Software"),
		9	* to deal in the Software without restriction, including without limitation
		10	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		11	* and/or sell copies of the Software, and to permit persons to whom the
		12	* Software is furnished to do so, subject to the following conditions:
		13	*
		14	* The above copyright notice and this permission notice shall be included
		15	* in all copies or substantial portions of the Software.
		16	*
		17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
		18	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		20	* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
		21	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		22	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		23	*
		24	* Authors:
		25	* Gareth Hughes
		26	*/
		27
		28	#ifndef __M_DEBUG_UTIL_H__
		29	#define __M_DEBUG_UTIL_H__
		30
		31
		32	#ifdef DEBUG_MATH /* This code only used for debugging */
		33
		34
		35	/* Comment this out to deactivate the cycle counter.
		36	* NOTE: it works only on CPUs which know the 'rdtsc' command (586 or higher)
		37	* (hope, you don't try to debug Mesa on a 386 ;)
		38	*/
		39	#if defined(__GNUC__) && \
		40	((defined(__i386__) && defined(USE_X86_ASM)) \|\| \
		41	(defined(__sparc__) && defined(USE_SPARC_ASM)))
		42	#define RUN_DEBUG_BENCHMARK
		43	#endif
		44
		45	#define TEST_COUNT 128 /* size of the tested vector array */
		46
		47	#define REQUIRED_PRECISION 10 /* allow 4 bits to miss */
		48	#define MAX_PRECISION 24 /* max. precision possible */
		49
		50
		51	#ifdef RUN_DEBUG_BENCHMARK
		52	/* Overhead of profiling counter in cycles. Automatically adjusted to
		53	* your machine at run time - counter initialization should give very
		54	* consistent results.
		55	*/
		56	extern long counter_overhead;
		57
		58	/* This is the value of the environment variable MESA_PROFILE, and is
		59	* used to determine if we should benchmark the functions as well as
		60	* verify their correctness.
		61	*/
		62	extern char *mesa_profile;
		63
		64	/* Modify the number of tests if you like.
		65	* We take the minimum of all results, because every error should be
		66	* positive (time used by other processes, task switches etc).
		67	* It is assumed that all calculations are done in the cache.
		68	*/
		69
		70	#if defined(__i386__)
		71
		72	#if 1 /* PPro, PII, PIII version */
		73
		74	/* Profiling on the P6 architecture requires a little more work, due to
		75	* the internal out-of-order execution. We must perform a serializing
		76	* 'cpuid' instruction before and after the 'rdtsc' instructions to make
		77	* sure no other uops are executed when we sample the timestamp counter.
		78	*/
		79	#define INIT_COUNTER() \
		80	do { \
		81	int cycle_i; \
		82	counter_overhead = LONG_MAX; \
		83	for ( cycle_i = 0 ; cycle_i < 8 ; cycle_i++ ) { \
		84	long cycle_tmp1 = 0, cycle_tmp2 = 0; \
		85	__asm__ __volatile__ ( "push %%ebx \n" \
		86	"xor %%eax, %%eax \n" \
		87	"cpuid \n" \
		88	"rdtsc \n" \
		89	"mov %%eax, %0 \n" \
		90	"xor %%eax, %%eax \n" \
		91	"cpuid \n" \
		92	"pop %%ebx \n" \
		93	"push %%ebx \n" \
		94	"xor %%eax, %%eax \n" \
		95	"cpuid \n" \
		96	"rdtsc \n" \
		97	"mov %%eax, %1 \n" \
		98	"xor %%eax, %%eax \n" \
		99	"cpuid \n" \
		100	"pop %%ebx \n" \
		101	: "=m" (cycle_tmp1), "=m" (cycle_tmp2) \
		102	: : "eax", "ecx", "edx" ); \
		103	if ( counter_overhead > (cycle_tmp2 - cycle_tmp1) ) { \
		104	counter_overhead = cycle_tmp2 - cycle_tmp1; \
		105	} \
		106	} \
		107	} while (0)
		108
		109	#define BEGIN_RACE(x) \
		110	x = LONG_MAX; \
		111	for ( cycle_i = 0 ; cycle_i < 10 ; cycle_i++ ) { \
		112	long cycle_tmp1 = 0, cycle_tmp2 = 0; \
		113	__asm__ __volatile__ ( "push %%ebx \n" \
		114	"xor %%eax, %%eax \n" \
		115	"cpuid \n" \
		116	"rdtsc \n" \
		117	"mov %%eax, %0 \n" \
		118	"xor %%eax, %%eax \n" \
		119	"cpuid \n" \
		120	"pop %%ebx \n" \
		121	: "=m" (cycle_tmp1) \
		122	: : "eax", "ecx", "edx" );
		123
		124	#define END_RACE(x) \
		125	__asm__ __volatile__ ( "push %%ebx \n" \
		126	"xor %%eax, %%eax \n" \
		127	"cpuid \n" \
		128	"rdtsc \n" \
		129	"mov %%eax, %0 \n" \
		130	"xor %%eax, %%eax \n" \
		131	"cpuid \n" \
		132	"pop %%ebx \n" \
		133	: "=m" (cycle_tmp2) \
		134	: : "eax", "ecx", "edx" ); \
		135	if ( x > (cycle_tmp2 - cycle_tmp1) ) { \
		136	x = cycle_tmp2 - cycle_tmp1; \
		137	} \
		138	} \
		139	x -= counter_overhead;
		140
		141	#else /* PPlain, PMMX version */
		142
		143	/* To ensure accurate results, we stall the pipelines with the
		144	* non-pairable 'cdq' instruction. This ensures all the code being
		145	* profiled is complete when the 'rdtsc' instruction executes.
		146	*/
		147	#define INIT_COUNTER(x) \
		148	do { \
		149	int cycle_i; \
		150	x = LONG_MAX; \
		151	for ( cycle_i = 0 ; cycle_i < 32 ; cycle_i++ ) { \
		152	long cycle_tmp1, cycle_tmp2, dummy; \
		153	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp1) ); \
		154	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp2) ); \
		155	__asm__ ( "cdq" ); \
		156	__asm__ ( "cdq" ); \
		157	__asm__ ( "rdtsc" : "=a" (cycle_tmp1), "=d" (dummy) ); \
		158	__asm__ ( "cdq" ); \
		159	__asm__ ( "cdq" ); \
		160	__asm__ ( "rdtsc" : "=a" (cycle_tmp2), "=d" (dummy) ); \
		161	if ( x > (cycle_tmp2 - cycle_tmp1) ) \
		162	x = cycle_tmp2 - cycle_tmp1; \
		163	} \
		164	} while (0)
		165
		166	#define BEGIN_RACE(x) \
		167	x = LONG_MAX; \
		168	for ( cycle_i = 0 ; cycle_i < 16 ; cycle_i++ ) { \
		169	long cycle_tmp1, cycle_tmp2, dummy; \
		170	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp1) ); \
		171	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp2) ); \
		172	__asm__ ( "cdq" ); \
		173	__asm__ ( "cdq" ); \
		174	__asm__ ( "rdtsc" : "=a" (cycle_tmp1), "=d" (dummy) );
		175
		176
		177	#define END_RACE(x) \
		178	__asm__ ( "cdq" ); \
		179	__asm__ ( "cdq" ); \
		180	__asm__ ( "rdtsc" : "=a" (cycle_tmp2), "=d" (dummy) ); \
		181	if ( x > (cycle_tmp2 - cycle_tmp1) ) \
		182	x = cycle_tmp2 - cycle_tmp1; \
		183	} \
		184	x -= counter_overhead;
		185
		186	#endif
		187
		188	#elif defined(__x86_64__)
		189
		190	#define rdtscll(val) do { \
		191	unsigned int a,d; \
		192	__asm__ volatile("rdtsc" : "=a" (a), "=d" (d)); \
		193	(val) = ((unsigned long)a) \| (((unsigned long)d)<<32); \
		194	} while(0)
		195
		196	/* Copied from i386 PIII version */
		197	#define INIT_COUNTER() \
		198	do { \
		199	int cycle_i; \
		200	counter_overhead = LONG_MAX; \
		201	for ( cycle_i = 0 ; cycle_i < 16 ; cycle_i++ ) { \
		202	unsigned long cycle_tmp1, cycle_tmp2; \
		203	rdtscll(cycle_tmp1); \
		204	rdtscll(cycle_tmp2); \
		205	if ( counter_overhead > (cycle_tmp2 - cycle_tmp1) ) { \
		206	counter_overhead = cycle_tmp2 - cycle_tmp1; \
		207	} \
		208	} \
		209	} while (0)
		210
		211
		212	#define BEGIN_RACE(x) \
		213	x = LONG_MAX; \
		214	for ( cycle_i = 0 ; cycle_i < 10 ; cycle_i++ ) { \
		215	unsigned long cycle_tmp1, cycle_tmp2; \
		216	rdtscll(cycle_tmp1); \
		217
		218	#define END_RACE(x) \
		219	rdtscll(cycle_tmp2); \
		220	if ( x > (cycle_tmp2 - cycle_tmp1) ) { \
		221	x = cycle_tmp2 - cycle_tmp1; \
		222	} \
		223	} \
		224	x -= counter_overhead;
		225
		226	#elif defined(__sparc__)
		227
		228	#define INIT_COUNTER() \
		229	do { counter_overhead = 5; } while(0)
		230
		231	#define BEGIN_RACE(x) \
		232	x = LONG_MAX; \
		233	for (cycle_i = 0; cycle_i <10; cycle_i++) { \
		234	register long cycle_tmp1 __asm__("l0"); \
		235	register long cycle_tmp2 __asm__("l1"); \
		236	/* rd %tick, %l0 */ \
		237	__asm__ __volatile__ (".word 0xa1410000" : "=r" (cycle_tmp1)); /* save timestamp */
		238
		239	#define END_RACE(x) \
		240	/* rd %tick, %l1 */ \
		241	__asm__ __volatile__ (".word 0xa3410000" : "=r" (cycle_tmp2)); \
		242	if (x > (cycle_tmp2-cycle_tmp1)) x = cycle_tmp2 - cycle_tmp1; \
		243	} \
		244	x -= counter_overhead;
		245
		246	#else
		247	#error Your processor is not supported for RUN_XFORM_BENCHMARK
		248	#endif
		249
		250	#else
		251
		252	#define BEGIN_RACE(x)
		253	#define END_RACE(x)
		254
		255	#endif
		256
		257
		258	/* =============================================================
		259	* Helper functions
		260	*/
		261
		262	static GLfloat rnd( void )
		263	{
		264	GLfloat f = (GLfloat)rand() / (GLfloat)RAND_MAX;
		265	GLfloat gran = (GLfloat)(1 << 13);
		266
		267	f = (GLfloat)(GLint)(f * gran) / gran;
		268
		269	return f * 2.0 - 1.0;
		270	}
		271
		272	static int significand_match( GLfloat a, GLfloat b )
		273	{
		274	GLfloat d = a - b;
		275	int a_ex, b_ex, d_ex;
		276
		277	if ( d == 0.0F ) {
		278	return MAX_PRECISION; /* Exact match */
		279	}
		280
		281	if ( a == 0.0F \|\| b == 0.0F ) {
		282	/* It would probably be better to check if the
		283	* non-zero number is denormalized and return
		284	* the index of the highest set bit here.
		285	*/
		286	return 0;
		287	}
		288
		289	FREXPF( a, &a_ex );
		290	FREXPF( b, &b_ex );
		291	FREXPF( d, &d_ex );
		292
		293	if ( a_ex < b_ex ) {
		294	return a_ex - d_ex;
		295	} else {
		296	return b_ex - d_ex;
		297	}
		298	}
		299
		300	enum { NIL = 0, ONE = 1, NEG = -1, VAR = 2 };
		301
		302	/* Ensure our arrays are correctly aligned.
		303	*/
		304	#if defined(__GNUC__)
		305	# define ALIGN16(type, array) type array __attribute__ ((aligned (16)))
		306	#elif defined(_MSC_VER)
		307	# define ALIGN16(type, array) type array __declspec(align(16)) /* GH: Does this work? */
		308	#elif defined(__WATCOMC__)
		309	# define ALIGN16(type, array) /* Watcom does not support this */
		310	#elif defined(__xlC__)
		311	# define ALIGN16(type, array) type __align (16) array
		312	#else
		313	# warning "ALIGN16 will not 16-byte align!\n"
		314	# define ALIGN16
		315	#endif
		316
		317
		318	#endif /* DEBUG_MATH */
		319
		320	#endif /* __M_DEBUG_UTIL_H__ */

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(root)/programs/develop/libraries/Mesa/src/mesa/math/m_debug_util.h – Rev 1901