/* * 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 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(__amd64__) #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__) # 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__ */