From 9a3301bc3c239e0e74d6bc20f950b338d31457d9 Mon Sep 17 00:00:00 2001
From: zap <zap@2a61fa91-e63d-0410-b60c-e65103854af9>
Date: Sun, 9 May 2010 13:53:35 +0000
Subject: [PATCH]  * Modified a little the asm instructions for detecting CPU features
  * configure will now print the vectorization instrution sets which will be used

git-svn-id: svn://svn.berlios.de/lensfun/trunk@109 2a61fa91-e63d-0410-b60c-e65103854af9
---
 configure              |    1 +
 libs/lensfun/cpuid.cpp |   28 ++++++++--------------------
 2 files changed, 9 insertions(+), 20 deletions(-)

diff --git a/configure b/configure
index 2439096..8cee50a 100755
--- a/configure
+++ b/configure
@@ -118,4 +118,5 @@ print "Target directory for data files:    " + tibs.DATADIR
 print "Target directory for libraries:     " + tibs.LIBDIR
 print "Target directory for include files: " + tibs.INCLUDEDIR
 print "Target directory for documentation: " + tibs.DOCDIR
+print "Use vector instruction set(-s):     " + ", ".join (x for x in tibs.VECTORIZATION)
 print "--------------------------------------------------------------------"
diff --git a/libs/lensfun/cpuid.cpp b/libs/lensfun/cpuid.cpp
index ed0ecf9..d7f43b3 100644
--- a/libs/lensfun/cpuid.cpp
+++ b/libs/lensfun/cpuid.cpp
@@ -25,17 +25,13 @@
 guint _lf_detect_cpu_features ()
 {
 #define cpuid(cmd) \
-    asm ( \
-        "push %%"R_BX"\n" \
+    __asm volatile ( \
         "cpuid\n" \
-        "pop %%"R_BX"\n" \
        : "=a" (ax), "=c" (cx),  "=d" (dx) \
-       : "0" (cmd))
+       : "0" (cmd) \
+       : R_BX)
 
-    register __SIZE_TYPE__ ax asm (R_AX);
-    register __SIZE_TYPE__ bx asm (R_BX);
-    register __SIZE_TYPE__ dx asm (R_DX);
-    register __SIZE_TYPE__ cx asm (R_CX);
+    __SIZE_TYPE__ ax, cx, dx, tmp;
     static GStaticMutex lock = G_STATIC_MUTEX_INIT;
     static guint cpuflags = -1;
 
@@ -45,7 +41,7 @@ guint _lf_detect_cpu_features ()
         cpuflags = 0;
 
         /* Test cpuid presence by checking bit 21 of eflags */
-        asm (
+        __asm volatile (
             "pushf\n"
             "pop     %0\n"
             "mov     %0, %1\n"
@@ -57,7 +53,7 @@ guint _lf_detect_cpu_features ()
             "cmp     %0, %1\n"
             "setne   %%al\n"
             "movzb   %%al, %0\n"
-            : "=r" (ax), "=r" (bx));
+            : "=r" (ax), "=r" (tmp));
 
         if (ax)
         {
@@ -88,12 +84,12 @@ guint _lf_detect_cpu_features ()
                     cpuflags |= LF_CPU_FLAG_SSE4_2;
             }
 
-            /* Is there extensions */
+            /* Are there extensions? */
             cpuid (0x80000000);
 
             if (ax)
             {
-                /* Request for extensions */
+                /* Ask extensions */
                 cpuid (0x80000001);
 
                 if (dx & 0x80000000)
@@ -112,12 +108,4 @@ guint _lf_detect_cpu_features ()
 #undef cpuid
 }
 
-#else
-
-guint
-rs_detect_cpu_features()
-{
-    return 0;
-}
-
 #endif /* __i386__ || __x86_64__ */
-- 
1.7.2.3

From 19a5478ec455de6a9201d5acf5e844a926761bdb Mon Sep 17 00:00:00 2001
From: zap <zap@2a61fa91-e63d-0410-b60c-e65103854af9>
Date: Wed, 12 May 2010 19:31:09 +0000
Subject: [PATCH]  * cpuid.cpp: push/pop ebx instead of marking it as clobbered, because gcc can't survive that when using -fPIC

git-svn-id: svn://svn.berlios.de/lensfun/trunk@110 2a61fa91-e63d-0410-b60c-e65103854af9
---
 libs/lensfun/cpuid.cpp |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/libs/lensfun/cpuid.cpp b/libs/lensfun/cpuid.cpp
index d7f43b3..491412c 100644
--- a/libs/lensfun/cpuid.cpp
+++ b/libs/lensfun/cpuid.cpp
@@ -26,10 +26,11 @@ guint _lf_detect_cpu_features ()
 {
 #define cpuid(cmd) \
     __asm volatile ( \
+        "push %%"R_BX"\n" \
         "cpuid\n" \
+        "pop %%"R_BX"\n" \
        : "=a" (ax), "=c" (cx),  "=d" (dx) \
-       : "0" (cmd) \
-       : R_BX)
+       : "0" (cmd))
 
     __SIZE_TYPE__ ax, cx, dx, tmp;
     static GStaticMutex lock = G_STATIC_MUTEX_INIT;
-- 
1.7.2.3