0,0 → 1,320 |
/* |
* Mesa 3-D graphics library |
* Version: 6.1 |
* |
* Copyright (C) 1999-2004 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 |
*/ |
|
#ifndef __M_DEBUG_UTIL_H__ |
#define __M_DEBUG_UTIL_H__ |
|
|
#ifdef DEBUG_MATH /* 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 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(__x86_64__) |
|
#define rdtscll(val) do { \ |
unsigned int a,d; \ |
__asm__ volatile("rdtsc" : "=a" (a), "=d" (d)); \ |
(val) = ((unsigned long)a) | (((unsigned long)d)<<32); \ |
} while(0) |
|
/* Copied from i386 PIII version */ |
#define INIT_COUNTER() \ |
do { \ |
int cycle_i; \ |
counter_overhead = LONG_MAX; \ |
for ( cycle_i = 0 ; cycle_i < 16 ; cycle_i++ ) { \ |
unsigned long cycle_tmp1, cycle_tmp2; \ |
rdtscll(cycle_tmp1); \ |
rdtscll(cycle_tmp2); \ |
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++ ) { \ |
unsigned long cycle_tmp1, cycle_tmp2; \ |
rdtscll(cycle_tmp1); \ |
|
#define END_RACE(x) \ |
rdtscll(cycle_tmp2); \ |
if ( x > (cycle_tmp2 - cycle_tmp1) ) { \ |
x = cycle_tmp2 - cycle_tmp1; \ |
} \ |
} \ |
x -= counter_overhead; |
|
#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; |
} |
|
FREXPF( a, &a_ex ); |
FREXPF( b, &b_ex ); |
FREXPF( 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(type, array) type array __attribute__ ((aligned (16))) |
#elif defined(_MSC_VER) |
# define ALIGN16(type, array) type array __declspec(align(16)) /* GH: Does this work? */ |
#elif defined(__WATCOMC__) |
# define ALIGN16(type, array) /* Watcom does not support this */ |
#elif defined(__xlC__) |
# define ALIGN16(type, array) type __align (16) array |
#else |
# warning "ALIGN16 will not 16-byte align!\n" |
# define ALIGN16 |
#endif |
|
|
#endif /* DEBUG_MATH */ |
|
#endif /* __M_DEBUG_UTIL_H__ */ |