+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.1
- *
- * Copyright (C) 1999-2006 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.
- */
-
-/**
- * \file common_x86.c
- *
- * Check CPU capabilities & initialize optimized funtions for this particular
- * processor.
- *
- * Changed by Andre Werthmann for using the new SSE functions.
- *
- * \author Holger Waechtler <holger@akaflieg.extern.tu-berlin.de>
- * \author Andre Werthmann <wertmann@cs.uni-potsdam.de>
- */
-
-/* XXX these includes should probably go into imports.h or glheader.h */
-#if defined(USE_SSE_ASM) && defined(__linux__)
-#include <linux/version.h>
-#endif
-#if defined(USE_SSE_ASM) && defined(__FreeBSD__)
-#include <sys/types.h>
-#include <sys/sysctl.h>
-#endif
-#if defined(USE_SSE_ASM) && defined(__OpenBSD__)
-#include <sys/param.h>
-#include <sys/sysctl.h>
-#include <machine/cpu.h>
-#endif
-
-#include "main/imports.h"
-#include "common_x86_asm.h"
-
-#include <pseh/pseh2.h>
-
-
-/** Bitmask of X86_FEATURE_x bits */
-int _mesa_x86_cpu_features = 0x0;
-
-static int detection_debug = GL_FALSE;
-
-/* No reason for this to be public.
- */
-extern GLuint _ASMAPI _mesa_x86_has_cpuid(void);
-extern void _ASMAPI _mesa_x86_cpuid(GLuint op, GLuint *reg_eax, GLuint *reg_ebx, GLuint *reg_ecx, GLuint *reg_edx);
-extern GLuint _ASMAPI _mesa_x86_cpuid_eax(GLuint op);
-extern GLuint _ASMAPI _mesa_x86_cpuid_ebx(GLuint op);
-extern GLuint _ASMAPI _mesa_x86_cpuid_ecx(GLuint op);
-extern GLuint _ASMAPI _mesa_x86_cpuid_edx(GLuint op);
-
-
-#if defined(USE_SSE_ASM)
-/*
- * We must verify that the Streaming SIMD Extensions are truly supported
- * on this processor before we go ahead and hook out the optimized code.
- *
- * However, I have been told by Alan Cox that all 2.4 (and later) Linux
- * kernels provide full SSE support on all processors that expose SSE via
- * the CPUID mechanism.
- */
-
-/* These are assembly functions: */
-extern void _mesa_test_os_sse_support( void );
-extern void _mesa_test_os_sse_exception_support( void );
-
-
-/**
- * Check if SSE is supported.
- * If not, turn off the X86_FEATURE_XMM flag in _mesa_x86_cpu_features.
- */
-void _mesa_check_os_sse_support( void )
-{
-#if defined(__FreeBSD__)
- {
- int ret, enabled;
- unsigned int len;
- len = sizeof(enabled);
- ret = sysctlbyname("hw.instruction_sse", &enabled, &len, NULL, 0);
- if (ret || !enabled)
- _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
- }
-#elif defined (__NetBSD__)
- {
- int ret, enabled;
- size_t len = sizeof(enabled);
- ret = sysctlbyname("machdep.sse", &enabled, &len, (void *)NULL, 0);
- if (ret || !enabled)
- _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
- }
-#elif defined(__OpenBSD__)
- {
- int mib[2];
- int ret, enabled;
- size_t len = sizeof(enabled);
-
- mib[0] = CTL_MACHDEP;
- mib[1] = CPU_SSE;
-
- ret = sysctl(mib, 2, &enabled, &len, NULL, 0);
- if (ret || !enabled)
- _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
- }
-#elif defined(WIN32)
- if ( cpu_has_xmm ) {
- _mesa_debug(NULL, "Testing OS support for SSE...\n");
-
- _SEH2_TRY
- {
- _mesa_test_os_sse_support();
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- if(_SEH2_GetExceptionCode() == EXCEPTION_ILLEGAL_INSTRUCTION)
- _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
- }
- _SEH2_END;
-
- if ( cpu_has_xmm ) {
- _mesa_debug(NULL, "Yes.\n");
- } else {
- _mesa_debug(NULL, "No!\n");
- }
- }
-
- if ( cpu_has_xmm ) {
- _mesa_debug(NULL, "Testing OS support for SSE unmasked exceptions...\n");
-
- _SEH2_TRY
- {
- _mesa_test_os_sse_exception_support();
- }
- _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
- {
- if(_SEH2_GetExceptionCode() == EXCEPTION_ILLEGAL_INSTRUCTION)
- _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
- }
- _SEH2_END;
-
- if ( cpu_has_xmm ) {
- _mesa_debug(NULL, "Yes.\n");
- } else {
- _mesa_debug(NULL, "No!\n");
- }
- }
-
- if ( cpu_has_xmm ) {
- _mesa_debug(NULL, "Tests of OS support for SSE passed.\n");
- } else {
- _mesa_debug(NULL, "Tests of OS support for SSE failed!\n");
- }
-#else
- /* Do nothing on other platforms for now.
- */
- if (detection_debug)
- _mesa_debug(NULL, "Not testing OS support for SSE, leaving enabled.\n");
-#endif /* __FreeBSD__ */
-}
-
-#endif /* USE_SSE_ASM */
-
-
-/**
- * Initialize the _mesa_x86_cpu_features bitfield.
- * This is a no-op if called more than once.
- */
-void
-_mesa_get_x86_features(void)
-{
- static int called = 0;
-
- if (called)
- return;
-
- called = 1;
-
-#ifdef USE_X86_ASM
- _mesa_x86_cpu_features = 0x0;
-
- if (_mesa_getenv( "MESA_NO_ASM")) {
- return;
- }
-
- if (!_mesa_x86_has_cpuid()) {
- _mesa_debug(NULL, "CPUID not detected\n");
- }
- else {
- GLuint cpu_features;
- GLuint cpu_ext_features;
- GLuint cpu_ext_info;
- char cpu_vendor[13];
- GLuint result;
-
- /* get vendor name */
- _mesa_x86_cpuid(0, &result, (GLuint *)(cpu_vendor + 0), (GLuint *)(cpu_vendor + 8), (GLuint *)(cpu_vendor + 4));
- cpu_vendor[12] = '\0';
-
- if (detection_debug)
- _mesa_debug(NULL, "CPU vendor: %s\n", cpu_vendor);
-
- /* get cpu features */
- cpu_features = _mesa_x86_cpuid_edx(1);
-
- if (cpu_features & X86_CPU_FPU)
- _mesa_x86_cpu_features |= X86_FEATURE_FPU;
- if (cpu_features & X86_CPU_CMOV)
- _mesa_x86_cpu_features |= X86_FEATURE_CMOV;
-
-#ifdef USE_MMX_ASM
- if (cpu_features & X86_CPU_MMX)
- _mesa_x86_cpu_features |= X86_FEATURE_MMX;
-#endif
-
-#ifdef USE_SSE_ASM
- if (cpu_features & X86_CPU_XMM)
- _mesa_x86_cpu_features |= X86_FEATURE_XMM;
- if (cpu_features & X86_CPU_XMM2)
- _mesa_x86_cpu_features |= X86_FEATURE_XMM2;
-#endif
-
- /* query extended cpu features */
- if ((cpu_ext_info = _mesa_x86_cpuid_eax(0x80000000)) > 0x80000000) {
- if (cpu_ext_info >= 0x80000001) {
-
- cpu_ext_features = _mesa_x86_cpuid_edx(0x80000001);
-
- if (cpu_features & X86_CPU_MMX) {
-
-#ifdef USE_3DNOW_ASM
- if (cpu_ext_features & X86_CPUEXT_3DNOW)
- _mesa_x86_cpu_features |= X86_FEATURE_3DNOW;
- if (cpu_ext_features & X86_CPUEXT_3DNOW_EXT)
- _mesa_x86_cpu_features |= X86_FEATURE_3DNOWEXT;
-#endif
-
-#ifdef USE_MMX_ASM
- if (cpu_ext_features & X86_CPUEXT_MMX_EXT)
- _mesa_x86_cpu_features |= X86_FEATURE_MMXEXT;
-#endif
- }
- }
-
- /* query cpu name */
- if (cpu_ext_info >= 0x80000002) {
- GLuint ofs;
- char cpu_name[49];
- for (ofs = 0; ofs < 3; ofs++)
- _mesa_x86_cpuid(0x80000002+ofs, (GLuint *)(cpu_name + (16*ofs)+0), (GLuint *)(cpu_name + (16*ofs)+4), (GLuint *)(cpu_name + (16*ofs)+8), (GLuint *)(cpu_name + (16*ofs)+12));
- cpu_name[48] = '\0'; /* the name should be NULL terminated, but just to be sure */
-
- if (detection_debug)
- _mesa_debug(NULL, "CPU name: %s\n", cpu_name);
- }
- }
-
- }
-
-#ifdef USE_MMX_ASM
- if ( cpu_has_mmx ) {
- if ( _mesa_getenv( "MESA_NO_MMX" ) == 0 ) {
- if (detection_debug)
- _mesa_debug(NULL, "MMX cpu detected.\n");
- } else {
- _mesa_x86_cpu_features &= ~(X86_FEATURE_MMX);
- }
- }
-#endif
-
-#ifdef USE_3DNOW_ASM
- if ( cpu_has_3dnow ) {
- if ( _mesa_getenv( "MESA_NO_3DNOW" ) == 0 ) {
- if (detection_debug)
- _mesa_debug(NULL, "3DNow! cpu detected.\n");
- } else {
- _mesa_x86_cpu_features &= ~(X86_FEATURE_3DNOW);
- }
- }
-#endif
-
-#ifdef USE_SSE_ASM
- if ( cpu_has_xmm ) {
- if ( _mesa_getenv( "MESA_NO_SSE" ) == 0 ) {
- if (detection_debug)
- _mesa_debug(NULL, "SSE cpu detected.\n");
- if ( _mesa_getenv( "MESA_FORCE_SSE" ) == 0 ) {
- _mesa_check_os_sse_support();
- }
- } else {
- _mesa_debug(NULL, "SSE cpu detected, but switched off by user.\n");
- _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
- }
- }
-#endif
-
-#endif /* USE_X86_ASM */
-
- (void) detection_debug;
-}
projects / reactos.git / blobdiff