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- Better Altivec detection, code from David Woodhouse

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This commit is contained in:
Bastien Nocera 2008-03-11 16:04:13 +00:00
parent 57066f742d
commit b96e1b9e65
2 changed files with 76 additions and 0 deletions
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69
libvisual-0.4.0-better-altivec-detection.patch Normal file
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@ -0,0 +1,69 @@
--- libvisual-0.4.0/libvisual/lv_cpu.c.orig 2006-01-22 13:23:37.000000000 +0000
+++ libvisual-0.4.0/libvisual/lv_cpu.c 2008-03-11 16:00:56.000000000 +0000
@@ -50,8 +50,19 @@
#endif
#if defined(VISUAL_OS_LINUX)
+#if defined(VISUAL_ARCH_POWERPC)
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include <linux/auxvec.h>
+#include <asm/cputable.h>
+#else /* VISUAL_ARCH_POWERPC */
#include <signal.h>
#endif
+#endif
#if defined(VISUAL_OS_WIN32)
#include <windows.h>
@@ -154,6 +165,46 @@ static void check_os_altivec_support( vo
if (err == 0)
if (has_vu != 0)
__lv_cpu_caps.hasAltiVec = 1;
+#elif defined (VISUAL_OS_LINUX)
+ static int available = -1;
+ int new_avail = 0;
+ char fname[64];
+ unsigned long buf[64];
+ ssize_t count;
+ pid_t pid;
+ int fd, i;
+
+ if (available != -1)
+ return;
+
+ pid = getpid();
+ snprintf(fname, sizeof(fname)-1, "/proc/%d/auxv", pid);
+
+ fd = open(fname, O_RDONLY);
+ if (fd < 0)
+ goto out;
+more:
+ count = read(fd, buf, sizeof(buf));
+ if (count < 0)
+ goto out_close;
+
+ for (i=0; i < (count / sizeof(unsigned long)); i += 2) {
+ if (buf[i] == AT_HWCAP) {
+ new_avail = !!(buf[i+1] & PPC_FEATURE_HAS_ALTIVEC);
+ goto out_close;
+ } else if (buf[i] == AT_NULL) {
+ goto out_close;
+ }
+ }
+
+ if (count == sizeof(buf))
+ goto more;
+out_close:
+ close(fd);
+out:
+ available = new_avail;
+ if (available)
+ __lv_cpu_caps.hasAltiVec = 1;
#else /* !VISUAL_OS_DARWIN */
/* no Darwin, do it the brute-force way */
/* this is borrowed from the libmpeg2 library */

7
libvisual.spec
View File

@ -12,6 +12,9 @@ Source0: http://dl.sf.net/libvisual/libvisual-0.4.0.tar.gz
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
BuildRequires: xorg-x11-proto-devel
# https://bugzilla.redhat.com/show_bug.cgi?id=435771
Patch0: libvisual-0.4.0-better-altivec-detection.patch
%description
Libvisual is an abstraction library that comes between applications and
@ -39,6 +42,7 @@ This package contains the files needed to build an application with libvisual.
%prep
%setup -q
%patch0 -p1 -b .altivec-detection
%build
%ifarch i386
@ -80,6 +84,9 @@ rm -rf $RPM_BUILD_ROOT
%changelog
* Tue Mar 11 2008 - Bastien Nocera <bnocera@redhat.com> - 0.4.0-6
- Better Altivec detection, code from David Woodhouse
* Mon Feb 18 2008 Fedora Release Engineering <rel-eng@fedoraproject.org> - 0.4.0-5
- Autorebuild for GCC 4.3