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Diffstat (limited to 'src/mesa/x86/common_x86.c')
| -rw-r--r-- | src/mesa/x86/common_x86.c | 448 |
1 files changed, 0 insertions, 448 deletions
diff --git a/src/mesa/x86/common_x86.c b/src/mesa/x86/common_x86.c deleted file mode 100644 index 0ff7fd51a6d..00000000000 --- a/src/mesa/x86/common_x86.c +++ /dev/null @@ -1,448 +0,0 @@ -/* - * Mesa 3-D graphics library - * Version: 6.0.1 - * - * 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. - */ - -/** - * \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 <[email protected]> - * \author Andre Werthmann <[email protected]> - */ - -/* XXX these includes should probably go into imports.h or glheader.h */ -#if defined(USE_SSE_ASM) && defined(__linux__) -#include <signal.h> -#endif -#if defined(USE_SSE_ASM) && defined(__FreeBSD__) -#include <sys/types.h> -#include <sys/sysctl.h> -#endif - -#include "common_x86_asm.h" -#include "imports.h" - - -int _mesa_x86_cpu_features = 0; - -/* 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); - -static void message( const char *msg ) -{ - GLboolean debug; -#ifdef DEBUG - debug = GL_TRUE; -#else - if ( _mesa_getenv( "MESA_DEBUG" ) ) { - debug = GL_TRUE; - } else { - debug = GL_FALSE; - } -#endif - if ( debug ) { - fprintf( stderr, "%s", msg ); - } -} - -#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. - * Unfortunately, the CPUID bit isn't enough, as the OS must set the - * OSFXSR bit in CR4 if it supports the extended FPU save and restore - * required to use SSE. Unfortunately, we can't just go ahead and read - * this register, as only the kernel can do that. Similarly, we must - * verify that the OSXMMEXCPT bit in CR4 has been set by the OS, - * signifying that it supports unmasked SIMD FPU exceptions. If we take - * an unmasked exception and the OS doesn't correctly support them, the - * best we'll get is a SIGILL and the worst we'll get is an infinite - * loop in the signal delivery from the kernel as we can't interact with - * the SIMD FPU state to clear the exception bits. Either way, this is - * not good. - * - * 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. It just so happens that this is the exact set of - * kernels supported DRI. Therefore, when building for DRI the funky SSE - * exception test is omitted. - */ - -extern void _mesa_test_os_sse_support( void ); -extern void _mesa_test_os_sse_exception_support( void ); - -#if defined(__linux__) && defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC) \ - && !defined(IN_DRI_DRIVER) -static void sigill_handler( int signal, struct sigcontext sc ) -{ - message( "SIGILL, " ); - - /* Both the "xorps %%xmm0,%%xmm0" and "divps %xmm0,%%xmm1" - * instructions are 3 bytes long. We must increment the instruction - * pointer manually to avoid repeated execution of the offending - * instruction. - * - * If the SIGILL is caused by a divide-by-zero when unmasked - * exceptions aren't supported, the SIMD FPU status and control - * word will be restored at the end of the test, so we don't need - * to worry about doing it here. Besides, we may not be able to... - */ - sc.eip += 3; - - _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM); -} - -static void sigfpe_handler( int signal, struct sigcontext sc ) -{ - message( "SIGFPE, " ); - - if ( sc.fpstate->magic != 0xffff ) { - /* Our signal context has the extended FPU state, so reset the - * divide-by-zero exception mask and clear the divide-by-zero - * exception bit. - */ - sc.fpstate->mxcsr |= 0x00000200; - sc.fpstate->mxcsr &= 0xfffffffb; - } else { - /* If we ever get here, we're completely hosed. - */ - message( "\n\n" ); - _mesa_problem( NULL, "SSE enabling test failed badly!" ); - } -} -#endif /* __linux__ && _POSIX_SOURCE && X86_FXSR_MAGIC */ - -#if defined(WIN32) -#ifndef STATUS_FLOAT_MULTIPLE_TRAPS -# define STATUS_FLOAT_MULTIPLE_TRAPS (0xC00002B5L) -#endif -static LONG WINAPI ExceptionFilter(LPEXCEPTION_POINTERS exp) -{ - PEXCEPTION_RECORD rec = exp->ExceptionRecord; - PCONTEXT ctx = exp->ContextRecord; - - if ( rec->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION ) { - message( "EXCEPTION_ILLEGAL_INSTRUCTION, " ); - _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM); - } else if ( rec->ExceptionCode == STATUS_FLOAT_MULTIPLE_TRAPS ) { - message( "STATUS_FLOAT_MULTIPLE_TRAPS, " ); - /* Windows seems to clear the exception flag itself, we just have to increment Eip */ - } else { - message( "UNEXPECTED EXCEPTION (0x%08x), terminating!" ); - return EXCEPTION_EXECUTE_HANDLER; - } - - if ( (ctx->ContextFlags & CONTEXT_CONTROL) != CONTEXT_CONTROL ) { - message( "Context does not contain control registers, terminating!" ); - return EXCEPTION_EXECUTE_HANDLER; - } - ctx->Eip += 3; - - return EXCEPTION_CONTINUE_EXECUTION; -} -#endif /* WIN32 */ - - -/* If we're running on a processor that can do SSE, let's see if we - * are allowed to or not. This will catch 2.4.0 or later kernels that - * haven't been configured for a Pentium III but are running on one, - * and RedHat patched 2.2 kernels that have broken exception handling - * support for user space apps that do SSE. - * - * GH: Isn't this just awful? - */ -static void check_os_sse_support( void ) -{ -#if defined(__linux__) && !defined(IN_DRI_DRIVER) -#if defined(_POSIX_SOURCE) && defined(X86_FXSR_MAGIC) - struct sigaction saved_sigill; - struct sigaction saved_sigfpe; - - /* Save the original signal handlers. - */ - sigaction( SIGILL, NULL, &saved_sigill ); - sigaction( SIGFPE, NULL, &saved_sigfpe ); - - signal( SIGILL, (void (*)(int))sigill_handler ); - signal( SIGFPE, (void (*)(int))sigfpe_handler ); - - /* Emulate test for OSFXSR in CR4. The OS will set this bit if it - * supports the extended FPU save and restore required for SSE. If - * we execute an SSE instruction on a PIII and get a SIGILL, the OS - * doesn't support Streaming SIMD Exceptions, even if the processor - * does. - */ - if ( cpu_has_xmm ) { - message( "Testing OS support for SSE... " ); - - _mesa_test_os_sse_support(); - - if ( cpu_has_xmm ) { - message( "yes.\n" ); - } else { - message( "no!\n" ); - } - } - - /* Emulate test for OSXMMEXCPT in CR4. The OS will set this bit if - * it supports unmasked SIMD FPU exceptions. If we unmask the - * exceptions, do a SIMD divide-by-zero and get a SIGILL, the OS - * doesn't support unmasked SIMD FPU exceptions. If we get a SIGFPE - * as expected, we're okay but we need to clean up after it. - * - * Are we being too stringent in our requirement that the OS support - * unmasked exceptions? Certain RedHat 2.2 kernels enable SSE by - * setting CR4.OSFXSR but don't support unmasked exceptions. Win98 - * doesn't even support them. We at least know the user-space SSE - * support is good in kernels that do support unmasked exceptions, - * and therefore to be safe I'm going to leave this test in here. - */ - if ( cpu_has_xmm ) { - message( "Testing OS support for SSE unmasked exceptions... " ); - - _mesa_test_os_sse_exception_support(); - - if ( cpu_has_xmm ) { - message( "yes.\n" ); - } else { - message( "no!\n" ); - } - } - - /* Restore the original signal handlers. - */ - sigaction( SIGILL, &saved_sigill, NULL ); - sigaction( SIGFPE, &saved_sigfpe, NULL ); - - /* If we've gotten to here and the XMM CPUID bit is still set, we're - * safe to go ahead and hook out the SSE code throughout Mesa. - */ - if ( cpu_has_xmm ) { - message( "Tests of OS support for SSE passed.\n" ); - } else { - message( "Tests of OS support for SSE failed!\n" ); - } -#else - /* We can't use POSIX signal handling to test the availability of - * SSE, so we disable it by default. - */ - message( "Cannot test OS support for SSE, disabling to be safe.\n" ); - _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM); -#endif /* _POSIX_SOURCE && X86_FXSR_MAGIC */ -#elif 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(WIN32) - LPTOP_LEVEL_EXCEPTION_FILTER oldFilter; - - /* Install our ExceptionFilter */ - oldFilter = SetUnhandledExceptionFilter( ExceptionFilter ); - - if ( cpu_has_xmm ) { - message( "Testing OS support for SSE... " ); - - _mesa_test_os_sse_support(); - - if ( cpu_has_xmm ) { - message( "yes.\n" ); - } else { - message( "no!\n" ); - } - } - - if ( cpu_has_xmm ) { - message( "Testing OS support for SSE unmasked exceptions... " ); - - _mesa_test_os_sse_exception_support(); - - if ( cpu_has_xmm ) { - message( "yes.\n" ); - } else { - message( "no!\n" ); - } - } - - /* Restore previous exception filter */ - SetUnhandledExceptionFilter( oldFilter ); - - if ( cpu_has_xmm ) { - message( "Tests of OS support for SSE passed.\n" ); - } else { - message( "Tests of OS support for SSE failed!\n" ); - } -#else - /* Do nothing on other platforms for now. - */ - message( "Not testing OS support for SSE, leaving enabled.\n" ); -#endif /* __linux__ */ -} - -#endif /* USE_SSE_ASM */ - - -void _mesa_init_all_x86_transform_asm( void ) -{ - (void) message; /* silence warning */ -#ifdef USE_X86_ASM - _mesa_x86_cpu_features = 0; - - if (!_mesa_x86_has_cpuid()) { - message("CPUID not detected"); - } - 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'; - - message("cpu vendor: "); - message(cpu_vendor); - message("\n"); - - /* 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 */ - - message("cpu name: "); - message(cpu_name); - message("\n"); - } - } - - } - - if ( _mesa_getenv( "MESA_NO_ASM" ) ) { - _mesa_x86_cpu_features = 0; - } - - if ( _mesa_x86_cpu_features ) { - _mesa_init_x86_transform_asm(); - } - -#ifdef USE_MMX_ASM - if ( cpu_has_mmx ) { - if ( _mesa_getenv( "MESA_NO_MMX" ) == 0 ) { - message( "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 ) { - message( "3DNow! cpu detected.\n" ); - _mesa_init_3dnow_transform_asm(); - } else { - _mesa_x86_cpu_features &= ~(X86_FEATURE_3DNOW); - } - } -#endif - -#ifdef USE_SSE_ASM - if ( cpu_has_xmm ) { - if ( _mesa_getenv( "MESA_NO_SSE" ) == 0 ) { - message( "SSE cpu detected.\n" ); - if ( _mesa_getenv( "MESA_FORCE_SSE" ) == 0 ) { - check_os_sse_support(); - } - if ( cpu_has_xmm ) { - _mesa_init_sse_transform_asm(); - } - } else { - message( "SSE cpu detected, but switched off by user.\n" ); - _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM); - } - } -#endif -#endif -} - |