-/* $Id: common_x86.c,v 1.7 2000/10/23 00:16:28 gareth Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 6.5.1
*
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
+ * 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"),
* 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.
*
- * Written by Holger Waechtler <holger@akaflieg.extern.tu-berlin.de>
- * Changed by Andre Werthmann <wertmann@cs.uni-potsdam.de> for using the
- * new Katmai functions.
+ * 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>
*/
-#include <stdlib.h>
-#include <stdio.h>
+/* 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"
-int gl_x86_cpu_features = 0;
+/** Bitmask of X86_FEATURE_x bits */
+int _mesa_x86_cpu_features = 0x0;
+
+
/* No reason for this to be public.
*/
-extern int gl_identify_x86_cpu_features( void );
+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 );
-static void message( const char *msg )
+
+#if defined(WIN32)
+#ifndef STATUS_FLOAT_MULTIPLE_TRAPS
+# define STATUS_FLOAT_MULTIPLE_TRAPS (0xC00002B5L)
+#endif
+static LONG WINAPI ExceptionFilter(LPEXCEPTION_POINTERS exp)
{
- if ( getenv( "MESA_DEBUG" ) ) {
- fprintf( stderr, "%s\n", msg );
+ PEXCEPTION_RECORD rec = exp->ExceptionRecord;
+ PCONTEXT ctx = exp->ContextRecord;
+
+ if ( rec->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION ) {
+ _mesa_debug(NULL, "EXCEPTION_ILLEGAL_INSTRUCTION\n" );
+ _mesa_x86_cpu_features &= ~(X86_FEATURE_XMM);
+ } else if ( rec->ExceptionCode == STATUS_FLOAT_MULTIPLE_TRAPS ) {
+ _mesa_debug(NULL, "STATUS_FLOAT_MULTIPLE_TRAPS\n");
+ /* Windows seems to clear the exception flag itself, we just have to increment Eip */
+ } else {
+ _mesa_debug(NULL, "UNEXPECTED EXCEPTION (0x%08x), terminating!\n" );
+ return EXCEPTION_EXECUTE_HANDLER;
+ }
+
+ if ( (ctx->ContextFlags & CONTEXT_CONTROL) != CONTEXT_CONTROL ) {
+ _mesa_debug(NULL, "Context does not contain control registers, terminating!\n");
+ return EXCEPTION_EXECUTE_HANDLER;
}
+ ctx->Eip += 3;
+
+ return EXCEPTION_CONTINUE_EXECUTION;
}
+#endif /* WIN32 */
-void gl_init_all_x86_transform_asm( 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 )
{
-#ifdef USE_X86_ASM
- gl_x86_cpu_features = gl_identify_x86_cpu_features();
-
- if ( getenv( "MESA_NO_ASM" ) ) {
- gl_x86_cpu_features = 0;
+#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);
- if ( gl_x86_cpu_features ) {
- gl_init_x86_transform_asm();
+ 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)
+ LPTOP_LEVEL_EXCEPTION_FILTER oldFilter;
+
+ /* Install our ExceptionFilter */
+ oldFilter = SetUnhandledExceptionFilter( ExceptionFilter );
+
+ if ( cpu_has_xmm ) {
+ _mesa_debug(NULL, "Testing OS support for SSE...\n");
-#ifdef USE_MMX_ASM
- if ( cpu_has_mmx ) {
- if ( getenv( "MESA_NO_MMX" ) == 0 ) {
- message( "MMX cpu detected." );
+ _mesa_test_os_sse_support();
+
+ if ( cpu_has_xmm ) {
+ _mesa_debug(NULL, "Yes.\n");
} else {
- gl_x86_cpu_features &= ~(X86_FEATURE_MMX);
+ _mesa_debug(NULL, "No!\n");
}
}
-#endif
-#ifdef USE_3DNOW_ASM
- if ( cpu_has_3dnow ) {
- if ( getenv( "MESA_NO_3DNOW" ) == 0 ) {
- message( "3Dnow cpu detected." );
- gl_init_3dnow_transform_asm();
+ if ( cpu_has_xmm ) {
+ _mesa_debug(NULL, "Testing OS support for SSE unmasked exceptions...\n");
+
+ _mesa_test_os_sse_exception_support();
+
+ if ( cpu_has_xmm ) {
+ _mesa_debug(NULL, "Yes.\n");
} else {
- gl_x86_cpu_features &= ~(X86_FEATURE_3DNOW);
+ _mesa_debug(NULL, "No!\n");
}
}
-#endif
-#ifdef USE_KATMAI_ASM
+ /* Restore previous exception filter */
+ SetUnhandledExceptionFilter( oldFilter );
+
if ( cpu_has_xmm ) {
- if ( getenv( "MESA_NO_KATMAI" ) == 0 ) {
- message( "Katmai cpu detected." );
- gl_init_katmai_transform_asm();
- } else {
- gl_x86_cpu_features &= ~(X86_FEATURE_XMM);
- }
+ _mesa_debug(NULL, "Tests of OS support for SSE passed.\n");
+ } else {
+ _mesa_debug(NULL, "Tests of OS support for SSE failed!\n");
}
-#endif
-#endif
+#else
+ /* Do nothing on other platforms for now.
+ */
+ _mesa_debug(NULL, "Not testing OS support for SSE, leaving enabled.\n");
+#endif /* __FreeBSD__ */
}
-/* Note: the above function must be called before this one, so that
- * gl_x86_cpu_features gets correctly initialized.
+#endif /* USE_SSE_ASM */
+
+
+/**
+ * Initialize the _mesa_x86_cpu_features bitfield.
+ * This is a no-op if called more than once.
*/
-void gl_init_all_x86_vertex_asm( void )
+void
+_mesa_get_x86_features(void)
{
+ static int called = 0;
+
+ if (called)
+ return;
+
+ called = 1;
+
#ifdef USE_X86_ASM
- if ( gl_x86_cpu_features ) {
- gl_init_x86_vertex_asm();
+ _mesa_x86_cpu_features = 0x0;
+
+ if (_mesa_getenv( "MESA_NO_ASM")) {
+ return;
}
-#ifdef USE_3DNOW_ASM
- if ( cpu_has_3dnow && getenv( "MESA_NO_3DNOW" ) == 0 ) {
- gl_init_3dnow_vertex_asm();
+ 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';
+
+ _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_KATMAI_ASM
- if ( cpu_has_xmm && getenv( "MESA_NO_KATMAI" ) == 0 ) {
- gl_init_katmai_vertex_asm();
- }
+#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 */
+
+ _mesa_debug(NULL, "CPU name: %s\n", cpu_name);
+ }
+ }
+
+ }
+#endif /* USE_X86_ASM */
}
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