WebSVN - shark - Blame - Rev 56 - /shark/trunk/ports/mesa/src/math/m_debug

Rev	Author	Line No.	Line
56	pj	1	/* $Id: m_debug_util.h,v 1.1 2003-02-28 11:48:05 pj Exp $ */
		2
		3	/*
		4	* Mesa 3-D graphics library
		5	* Version: 3.5
		6	*
		7	* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
		8	*
		9	* Permission is hereby granted, free of charge, to any person obtaining a
		10	* copy of this software and associated documentation files (the "Software"),
		11	* to deal in the Software without restriction, including without limitation
		12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		13	* and/or sell copies of the Software, and to permit persons to whom the
		14	* Software is furnished to do so, subject to the following conditions:
		15	*
		16	* The above copyright notice and this permission notice shall be included
		17	* in all copies or substantial portions of the Software.
		18	*
		19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
		20	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		22	* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
		23	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		24	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		25	*
		26	* Authors:
		27	* Gareth Hughes
		28	*/
		29
		30	#ifndef __M_DEBUG_UTIL_H__
		31	#define __M_DEBUG_UTIL_H__
		32
		33
		34	#ifdef DEBUG /* This code only used for debugging */
		35
		36
		37	/* Comment this out to deactivate the cycle counter.
		38	* NOTE: it works only on CPUs which know the 'rdtsc' command (586 or higher)
		39	* (hope, you don't try to debug Mesa on a 386 ;)
		40	*/
		41	#if defined(__GNUC__) && \
		42	((defined(__i386__) && defined(USE_X86_ASM)) \|\| \
		43	(defined(__sparc__) && defined(USE_SPARC_ASM)))
		44	#define RUN_DEBUG_BENCHMARK
		45	#endif
		46
		47	#define TEST_COUNT 128 /* size of the tested vector array */
		48
		49	#define REQUIRED_PRECISION 10 /* allow 4 bits to miss */
		50	#define MAX_PRECISION 24 /* max. precision possible */
		51
		52
		53	#ifdef RUN_DEBUG_BENCHMARK
		54	/* Overhead of profiling counter in cycles. Automatically adjusted to
		55	* your machine at run time - counter initialization should give very
		56	* consistent results.
		57	*/
		58	extern long counter_overhead;
		59
		60	/* This is the value of the environment variable MESA_PROFILE, and is
		61	* used to determine if we should benchmark the functions as well as
		62	* verify their correctness.
		63	*/
		64	extern char *mesa_profile;
		65
		66	/* Modify the the number of tests if you like.
		67	* We take the minimum of all results, because every error should be
		68	* positive (time used by other processes, task switches etc).
		69	* It is assumed that all calculations are done in the cache.
		70	*/
		71
		72	#if defined(__i386__)
		73
		74	#if 1 /* PPro, PII, PIII version */
		75
		76	/* Profiling on the P6 architecture requires a little more work, due to
		77	* the internal out-of-order execution. We must perform a serializing
		78	* 'cpuid' instruction before and after the 'rdtsc' instructions to make
		79	* sure no other uops are executed when we sample the timestamp counter.
		80	*/
		81	#define INIT_COUNTER() \
		82	do { \
		83	int cycle_i; \
		84	counter_overhead = LONG_MAX; \
		85	for ( cycle_i = 0 ; cycle_i < 8 ; cycle_i++ ) { \
		86	long cycle_tmp1 = 0, cycle_tmp2 = 0; \
		87	__asm__ __volatile__ ( "push %%ebx \n" \
		88	"xor %%eax, %%eax \n" \
		89	"cpuid \n" \
		90	"rdtsc \n" \
		91	"mov %%eax, %0 \n" \
		92	"xor %%eax, %%eax \n" \
		93	"cpuid \n" \
		94	"pop %%ebx \n" \
		95	"push %%ebx \n" \
		96	"xor %%eax, %%eax \n" \
		97	"cpuid \n" \
		98	"rdtsc \n" \
		99	"mov %%eax, %1 \n" \
		100	"xor %%eax, %%eax \n" \
		101	"cpuid \n" \
		102	"pop %%ebx \n" \
		103	: "=m" (cycle_tmp1), "=m" (cycle_tmp2) \
		104	: : "eax", "ecx", "edx" ); \
		105	if ( counter_overhead > (cycle_tmp2 - cycle_tmp1) ) { \
		106	counter_overhead = cycle_tmp2 - cycle_tmp1; \
		107	} \
		108	} \
		109	} while (0)
		110
		111	#define BEGIN_RACE(x) \
		112	x = LONG_MAX; \
		113	for ( cycle_i = 0 ; cycle_i < 10 ; cycle_i++ ) { \
		114	long cycle_tmp1 = 0, cycle_tmp2 = 0; \
		115	__asm__ __volatile__ ( "push %%ebx \n" \
		116	"xor %%eax, %%eax \n" \
		117	"cpuid \n" \
		118	"rdtsc \n" \
		119	"mov %%eax, %0 \n" \
		120	"xor %%eax, %%eax \n" \
		121	"cpuid \n" \
		122	"pop %%ebx \n" \
		123	: "=m" (cycle_tmp1) \
		124	: : "eax", "ecx", "edx" );
		125
		126	#define END_RACE(x) \
		127	__asm__ __volatile__ ( "push %%ebx \n" \
		128	"xor %%eax, %%eax \n" \
		129	"cpuid \n" \
		130	"rdtsc \n" \
		131	"mov %%eax, %0 \n" \
		132	"xor %%eax, %%eax \n" \
		133	"cpuid \n" \
		134	"pop %%ebx \n" \
		135	: "=m" (cycle_tmp2) \
		136	: : "eax", "ecx", "edx" ); \
		137	if ( x > (cycle_tmp2 - cycle_tmp1) ) { \
		138	x = cycle_tmp2 - cycle_tmp1; \
		139	} \
		140	} \
		141	x -= counter_overhead;
		142
		143	#else /* PPlain, PMMX version */
		144
		145	/* To ensure accurate results, we stall the pipelines with the
		146	* non-pairable 'cdq' instruction. This ensures all the code being
		147	* profiled is complete when the 'rdtsc' instruction executes.
		148	*/
		149	#define INIT_COUNTER(x) \
		150	do { \
		151	int cycle_i; \
		152	x = LONG_MAX; \
		153	for ( cycle_i = 0 ; cycle_i < 32 ; cycle_i++ ) { \
		154	long cycle_tmp1, cycle_tmp2, dummy; \
		155	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp1) ); \
		156	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp2) ); \
		157	__asm__ ( "cdq" ); \
		158	__asm__ ( "cdq" ); \
		159	__asm__ ( "rdtsc" : "=a" (cycle_tmp1), "=d" (dummy) ); \
		160	__asm__ ( "cdq" ); \
		161	__asm__ ( "cdq" ); \
		162	__asm__ ( "rdtsc" : "=a" (cycle_tmp2), "=d" (dummy) ); \
		163	if ( x > (cycle_tmp2 - cycle_tmp1) ) \
		164	x = cycle_tmp2 - cycle_tmp1; \
		165	} \
		166	} while (0)
		167
		168	#define BEGIN_RACE(x) \
		169	x = LONG_MAX; \
		170	for ( cycle_i = 0 ; cycle_i < 16 ; cycle_i++ ) { \
		171	long cycle_tmp1, cycle_tmp2, dummy; \
		172	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp1) ); \
		173	__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp2) ); \
		174	__asm__ ( "cdq" ); \
		175	__asm__ ( "cdq" ); \
		176	__asm__ ( "rdtsc" : "=a" (cycle_tmp1), "=d" (dummy) );
		177
		178
		179	#define END_RACE(x) \
		180	__asm__ ( "cdq" ); \
		181	__asm__ ( "cdq" ); \
		182	__asm__ ( "rdtsc" : "=a" (cycle_tmp2), "=d" (dummy) ); \
		183	if ( x > (cycle_tmp2 - cycle_tmp1) ) \
		184	x = cycle_tmp2 - cycle_tmp1; \
		185	} \
		186	x -= counter_overhead;
		187
		188	#endif
		189
		190	#elif defined(__sparc__)
		191
		192	#define INIT_COUNTER() \
		193	do { counter_overhead = 5; } while(0)
		194
		195	#define BEGIN_RACE(x) \
		196	x = LONG_MAX; \
		197	for (cycle_i = 0; cycle_i <10; cycle_i++) { \
		198	register long cycle_tmp1 asm("l0"); \
		199	register long cycle_tmp2 asm("l1"); \
		200	/* rd %tick, %l0 */ \
		201	__asm__ __volatile__ (".word 0xa1410000" : "=r" (cycle_tmp1)); /* save timestamp */
		202
		203	#define END_RACE(x) \
		204	/* rd %tick, %l1 */ \
		205	__asm__ __volatile__ (".word 0xa3410000" : "=r" (cycle_tmp2)); \
		206	if (x > (cycle_tmp2-cycle_tmp1)) x = cycle_tmp2 - cycle_tmp1; \
		207	} \
		208	x -= counter_overhead;
		209
		210	#else
		211	#error Your processor is not supported for RUN_XFORM_BENCHMARK
		212	#endif
		213
		214	#else
		215
		216	#define BEGIN_RACE(x)
		217	#define END_RACE(x)
		218
		219	#endif
		220
		221
		222	/* =============================================================
		223	* Helper functions
		224	*/
		225
		226	static GLfloat rnd( void )
		227	{
		228	GLfloat f = (GLfloat)rand() / (GLfloat)RAND_MAX;
		229	GLfloat gran = (GLfloat)(1 << 13);
		230
		231	f = (GLfloat)(GLint)(f * gran) / gran;
		232
		233	return f * 2.0 - 1.0;
		234	}
		235
		236	static int significand_match( GLfloat a, GLfloat b )
		237	{
		238	GLfloat d = a - b;
		239	int a_ex, b_ex, d_ex;
		240
		241	if ( d == 0.0F ) {
		242	return MAX_PRECISION; /* Exact match */
		243	}
		244
		245	if ( a == 0.0F \|\| b == 0.0F ) {
		246	/* It would probably be better to check if the
		247	* non-zero number is denormalized and return
		248	* the index of the highest set bit here.
		249	*/
		250	return 0;
		251	}
		252
		253	frexp( a, &a_ex );
		254	frexp( b, &b_ex );
		255	frexp( d, &d_ex );
		256
		257	if ( a_ex < b_ex ) {
		258	return a_ex - d_ex;
		259	} else {
		260	return b_ex - d_ex;
		261	}
		262	}
		263
		264	enum { NIL = 0, ONE = 1, NEG = -1, VAR = 2 };
		265
		266	/* Ensure our arrays are correctly aligned.
		267	*/
		268	#if defined(__GNUC__)
		269	# define ALIGN16 __attribute__ ((aligned (16)))
		270	#elif defined(__MSC__)
		271	# define ALIGN16 __declspec(align(16)) /* GH: Does this work? */
		272	#else
		273	# warning "ALIGN16 will not 16-byte align!\n"
		274	# define ALIGN16
		275	#endif
		276
		277
		278	#endif /* DEBUG */
		279
		280	#endif /* __M_DEBUG_UTIL_H__ */

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