| /* |
| * 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(__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__) |
| # 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__ */ |
