Initial support for PowerPC specific code in Mesa and DRI drivers. DRI

drivers built on PowerPC systems should now show things like "PowerPC" or
"PowerPC/Altivec" in the GL_RENDERER string.

The VMX moniker is used for Altivec/Velocity Engine/VMX SIMD additions.  I
chose this not because I work for IBM but because it's a LOT shorter to
type. :)

5 files changed, 175 insertions, 6 deletions

diff --git a/src/mesa/drivers/dri/common/utils.c b/src/mesa/drivers/dri/common/utils.c
index 59401073ec..0e8e54a202 100644
--- a/src/mesa/drivers/dri/common/utils.c
+++ b/src/mesa/drivers/dri/common/utils.c
@@ -20,11 +20,14 @@
  * 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 utils.c
+ * Utility functions for DRI drivers.
  *
- * Authors:
- *    Ian Romanick <idr@us.ibm.com>
+ * \author Ian Romanick <idr@us.ibm.com>
  */
-/* $XFree86:$ */
 
 #include <string.h>
 #include <stdlib.h>
@@ -40,6 +43,10 @@
 #include "x86/common_x86_asm.h"
 #endif
 
+#if defined(USE_PPC_ASM)
+#include "ppc/common_ppc_features.h"
+#endif
+
 unsigned
 driParseDebugString( const char * debug, 
 		     const struct dri_debug_control * control  )
@@ -141,6 +148,23 @@ driGetRendererString( char * buffer, const char * hardware_name,
    cpu[0] = " SPARC";
    next = 1;
 
+#elif defined(USE_PPC_ASM)
+   if ( _mesa_ppc_cpu_features ) {
+      cpu[next] = (cpu_has_64) ? " PowerPC 64" : " PowerPC";
+      next++;
+   }
+
+# ifdef USE_VMX_ASM
+   if ( cpu_has_vmx ) {
+      cpu[next] = "/Altivec";
+      next++;
+   }
+# endif
+
+   if ( ! cpu_has_fpu ) {
+      cpu[next] = "/No FPU";
+      next++;
+   }
 #endif
 
    for ( i = 0 ; i < next ; i++ ) {
diff --git a/src/mesa/math/m_xform.c b/src/mesa/math/m_xform.c
index c1d543b07e..66dc44d954 100644
--- a/src/mesa/math/m_xform.c
+++ b/src/mesa/math/m_xform.c
@@ -55,6 +55,10 @@
 #include "sparc/sparc.h"
 #endif
 
+#ifdef USE_PPC_ASM
+#include "ppc/common_ppc_features.h"
+#endif
+
 clip_func _mesa_clip_tab[5];
 clip_func _mesa_clip_np_tab[5];
 dotprod_func _mesa_dotprod_tab[5];
@@ -204,9 +208,10 @@ _math_init_transformation( void )
 
 #ifdef USE_X86_ASM
    _mesa_init_all_x86_transform_asm();
-#endif
-#ifdef USE_SPARC_ASM
+#elif defined( USE_SPARC_ASM )
    _mesa_init_all_sparc_transform_asm();
+#elif defined( USE_PPC_ASM )
+   _mesa_init_all_ppc_transform_asm();
 #endif
 }
 
diff --git a/src/mesa/ppc/common_ppc.c b/src/mesa/ppc/common_ppc.c
new file mode 100644
index 0000000000..13526df78c
--- /dev/null
+++ b/src/mesa/ppc/common_ppc.c
@@ -0,0 +1,88 @@
+/*
+ * (C) Copyright IBM Corporation 2004
+ * 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
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, 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 (including the next
+ * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS 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_ppc.c
+ * Check CPU capabilities & initialize optimized funtions for this particular
+ * processor.
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#ifdef USE_PPC_ASM
+#include <elf.h>
+#endif
+
+unsigned long _mesa_ppc_cpu_features = 0;
+
+/**
+ * Detect CPU features and install optimized transform and lighting routines.
+ * Currently, CPU features are only detected.  The optimized routines have
+ * yet to be written.
+ * 
+ * \bug
+ * This routine is highly specific to Linux kernel 2.6.  I'm still waiting
+ * to hear back from the glibc folk on how to do this "right".
+ */
+
+void _mesa_init_all_ppc_transform_asm( void )
+{
+#ifdef USE_PPC_ASM
+   const pid_t  my_pid = getpid();
+   char file_name[32];
+   FILE * f;
+#ifdef __powerpc64__
+   Elf64_auxv_t  v;
+#else
+   Elf32_auxv_t  v;
+#endif
+
+   sprintf( file_name, "/proc/%u/auxv", (unsigned) my_pid );
+   f = fopen( file_name, "rb" );
+   if ( f != NULL ) {
+      while( 1 ) {
+	 ssize_t elem = fread( & v, sizeof( v ), 1, f );
+
+	 if ( elem < 1 ) {
+	    break;
+	 }
+
+	 if ( v.a_type == AT_HWCAP ) {
+	    _mesa_ppc_cpu_features = v.a_un.a_val;
+	    break;
+	 }
+      }
+
+      fclose( f );
+   }
+   
+# ifndef USE_VMX_ASM
+   _mesa_ppc_cpu_features &= ~PPC_FEATURES_HAS_ALTIVEC;
+# endif
+#endif
+}
diff --git a/src/mesa/ppc/common_ppc_features.h b/src/mesa/ppc/common_ppc_features.h
new file mode 100644
index 0000000000..4d46ca04c9
--- /dev/null
+++ b/src/mesa/ppc/common_ppc_features.h
@@ -0,0 +1,51 @@
+/*
+ * (C) Copyright IBM Corporation 2004
+ * 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
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, 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 (including the next
+ * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS 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_ppc_features.h
+ * Interface for determining which CPU features were detected.
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+#ifndef COMMON_PPC_FEATURES_H
+#define COMMON_PPC_FEATURES_H
+
+#ifdef USE_PPC_ASM
+#include <asm/cputable.h>
+
+extern unsigned long _mesa_ppc_cpu_features;
+
+
+/* The PPC_FEATURE_* values come from asm/cputable.h.  Should we define
+ * versions of them here if that file does not exist?  This will only
+ * matter once these code paths are supported on non-Linux platforms.
+ */
+
+#define cpu_has_64  ((_mesa_ppc_cpu_features & PPC_FEATURE_64) != 0)
+#define cpu_has_vmx ((_mesa_ppc_cpu_features & PPC_FEATURE_HAS_ALTIVEC) != 0)
+#define cpu_has_fpu ((_mesa_ppc_cpu_features & PPC_FEATURE_HAS_FPU) != 0)
+
+#endif /* USE_PPC_ASM */
+#endif /* COMMON_PPC_FEATURES_H */
diff --git a/src/mesa/sources b/src/mesa/sources
index 9845dc033b..7013182f6f 100644
--- a/src/mesa/sources
+++ b/src/mesa/sources
@@ -150,7 +150,8 @@ ASM_C_SOURCES =	\
 	x86/x86.c \
 	x86/3dnow.c \
 	x86/sse.c \
-	sparc/sparc.c
+	sparc/sparc.c \
+	ppc/common_ppc.c
 
 X86_SOURCES =			\
 	x86/common_x86_asm.S	\