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/* $Id: m_debug_util.h,v 1.5 2002/06/29 19:48:17 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Gareth Hughes <gareth@valinux.com>
*/
#ifndef __M_DEBUG_UTIL_H__
#define __M_DEBUG_UTIL_H__
#ifdef DEBUG /* This code only used for debugging */
/* Comment this out to deactivate the cycle counter.
* NOTE: it works only on CPUs which know the 'rdtsc' command (586 or higher)
* (hope, you don't try to debug Mesa on a 386 ;)
*/
#if defined(__GNUC__) && \
((defined(__i386__) && defined(USE_X86_ASM)) || \
(defined(__sparc__) && defined(USE_SPARC_ASM)))
#define RUN_DEBUG_BENCHMARK
#endif
#define TEST_COUNT 128 /* size of the tested vector array */
#define REQUIRED_PRECISION 10 /* allow 4 bits to miss */
#define MAX_PRECISION 24 /* max. precision possible */
#ifdef RUN_DEBUG_BENCHMARK
/* Overhead of profiling counter in cycles. Automatically adjusted to
* your machine at run time - counter initialization should give very
* consistent results.
*/
extern long counter_overhead;
/* This is the value of the environment variable MESA_PROFILE, and is
* used to determine if we should benchmark the functions as well as
* verify their correctness.
*/
extern char *mesa_profile;
/* Modify the the number of tests if you like.
* We take the minimum of all results, because every error should be
* positive (time used by other processes, task switches etc).
* It is assumed that all calculations are done in the cache.
*/
#if defined(__i386__)
#if 1 /* PPro, PII, PIII version */
/* Profiling on the P6 architecture requires a little more work, due to
* the internal out-of-order execution. We must perform a serializing
* 'cpuid' instruction before and after the 'rdtsc' instructions to make
* sure no other uops are executed when we sample the timestamp counter.
*/
#define INIT_COUNTER() \
do { \
int cycle_i; \
counter_overhead = LONG_MAX; \
for ( cycle_i = 0 ; cycle_i < 8 ; cycle_i++ ) { \
long cycle_tmp1 = 0, cycle_tmp2 = 0; \
__asm__ __volatile__ ( "push %%ebx \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"rdtsc \n" \
"mov %%eax, %0 \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"pop %%ebx \n" \
"push %%ebx \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"rdtsc \n" \
"mov %%eax, %1 \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"pop %%ebx \n" \
: "=m" (cycle_tmp1), "=m" (cycle_tmp2) \
: : "eax", "ecx", "edx" ); \
if ( counter_overhead > (cycle_tmp2 - cycle_tmp1) ) { \
counter_overhead = cycle_tmp2 - cycle_tmp1; \
} \
} \
} while (0)
#define BEGIN_RACE(x) \
x = LONG_MAX; \
for ( cycle_i = 0 ; cycle_i < 10 ; cycle_i++ ) { \
long cycle_tmp1 = 0, cycle_tmp2 = 0; \
__asm__ __volatile__ ( "push %%ebx \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"rdtsc \n" \
"mov %%eax, %0 \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"pop %%ebx \n" \
: "=m" (cycle_tmp1) \
: : "eax", "ecx", "edx" );
#define END_RACE(x) \
__asm__ __volatile__ ( "push %%ebx \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"rdtsc \n" \
"mov %%eax, %0 \n" \
"xor %%eax, %%eax \n" \
"cpuid \n" \
"pop %%ebx \n" \
: "=m" (cycle_tmp2) \
: : "eax", "ecx", "edx" ); \
if ( x > (cycle_tmp2 - cycle_tmp1) ) { \
x = cycle_tmp2 - cycle_tmp1; \
} \
} \
x -= counter_overhead;
#else /* PPlain, PMMX version */
/* To ensure accurate results, we stall the pipelines with the
* non-pairable 'cdq' instruction. This ensures all the code being
* profiled is complete when the 'rdtsc' instruction executes.
*/
#define INIT_COUNTER(x) \
do { \
int cycle_i; \
x = LONG_MAX; \
for ( cycle_i = 0 ; cycle_i < 32 ; cycle_i++ ) { \
long cycle_tmp1, cycle_tmp2, dummy; \
__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp1) ); \
__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp2) ); \
__asm__ ( "cdq" ); \
__asm__ ( "cdq" ); \
__asm__ ( "rdtsc" : "=a" (cycle_tmp1), "=d" (dummy) ); \
__asm__ ( "cdq" ); \
__asm__ ( "cdq" ); \
__asm__ ( "rdtsc" : "=a" (cycle_tmp2), "=d" (dummy) ); \
if ( x > (cycle_tmp2 - cycle_tmp1) ) \
x = cycle_tmp2 - cycle_tmp1; \
} \
} while (0)
#define BEGIN_RACE(x) \
x = LONG_MAX; \
for ( cycle_i = 0 ; cycle_i < 16 ; cycle_i++ ) { \
long cycle_tmp1, cycle_tmp2, dummy; \
__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp1) ); \
__asm__ ( "mov %%eax, %0" : "=a" (cycle_tmp2) ); \
__asm__ ( "cdq" ); \
__asm__ ( "cdq" ); \
__asm__ ( "rdtsc" : "=a" (cycle_tmp1), "=d" (dummy) );
#define END_RACE(x) \
__asm__ ( "cdq" ); \
__asm__ ( "cdq" ); \
__asm__ ( "rdtsc" : "=a" (cycle_tmp2), "=d" (dummy) ); \
if ( x > (cycle_tmp2 - cycle_tmp1) ) \
x = cycle_tmp2 - cycle_tmp1; \
} \
x -= counter_overhead;
#endif
#elif defined(__sparc__)
#define INIT_COUNTER() \
do { counter_overhead = 5; } while(0)
#define BEGIN_RACE(x) \
x = LONG_MAX; \
for (cycle_i = 0; cycle_i <10; cycle_i++) { \
register long cycle_tmp1 asm("l0"); \
register long cycle_tmp2 asm("l1"); \
/* rd %tick, %l0 */ \
__asm__ __volatile__ (".word 0xa1410000" : "=r" (cycle_tmp1)); /* save timestamp */
#define END_RACE(x) \
/* rd %tick, %l1 */ \
__asm__ __volatile__ (".word 0xa3410000" : "=r" (cycle_tmp2)); \
if (x > (cycle_tmp2-cycle_tmp1)) x = cycle_tmp2 - cycle_tmp1; \
} \
x -= counter_overhead;
#else
#error Your processor is not supported for RUN_XFORM_BENCHMARK
#endif
#else
#define BEGIN_RACE(x)
#define END_RACE(x)
#endif
/* =============================================================
* Helper functions
*/
static GLfloat rnd( void )
{
GLfloat f = (GLfloat)rand() / (GLfloat)RAND_MAX;
GLfloat gran = (GLfloat)(1 << 13);
f = (GLfloat)(GLint)(f * gran) / gran;
return f * 2.0 - 1.0;
}
static int significand_match( GLfloat a, GLfloat b )
{
GLfloat d = a - b;
int a_ex, b_ex, d_ex;
if ( d == 0.0F ) {
return MAX_PRECISION; /* Exact match */
}
if ( a == 0.0F || b == 0.0F ) {
/* It would probably be better to check if the
* non-zero number is denormalized and return
* the index of the highest set bit here.
*/
return 0;
}
frexp( a, &a_ex );
frexp( b, &b_ex );
frexp( d, &d_ex );
if ( a_ex < b_ex ) {
return a_ex - d_ex;
} else {
return b_ex - d_ex;
}
}
enum { NIL = 0, ONE = 1, NEG = -1, VAR = 2 };
/* Ensure our arrays are correctly aligned.
*/
#if defined(__GNUC__)
# define ALIGN16 __attribute__ ((aligned (16)))
#elif defined(__MSC__)
# define ALIGN16 __declspec(align(16)) /* GH: Does this work? */
#else
# warning "ALIGN16 will not 16-byte align!\n"
# define ALIGN16
#endif
#endif /* DEBUG */
#endif /* __M_DEBUG_UTIL_H__ */
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