libvpx[loongarch]: Add loongarch support.

LSX and LASX are enabled by default if compiler supports them.

Bug: webm:1754

Change-Id: Ic36b113bc4313c50e9d2bbab91199b3aa46d00dc

1 files changed, 47 insertions, 0 deletions

diff --git a/build/make/rtcd.pl b/build/make/rtcd.pl
index acb9f6e46..8ed776add 100755
--- a/build/make/rtcd.pl
+++ b/build/make/rtcd.pl
@@ -387,6 +387,37 @@ EOF
   common_bottom;
 }
 
+sub loongarch() {
+  determine_indirection("c", @ALL_ARCHS);
+
+  # Assign the helper variable for each enabled extension
+  foreach my $opt (@ALL_ARCHS) {
+    my $opt_uc = uc $opt;
+    eval "\$have_${opt}=\"flags & HAS_${opt_uc}\"";
+  }
+
+  common_top;
+  print <<EOF;
+#include "vpx_config.h"
+
+#ifdef RTCD_C
+#include "vpx_ports/loongarch.h"
+static void setup_rtcd_internal(void)
+{
+    int flags = loongarch_cpu_caps();
+
+    (void)flags;
+EOF
+
+  set_function_pointers("c", @ALL_ARCHS);
+
+  print <<EOF;
+}
+#endif
+EOF
+  common_bottom;
+}
+
 sub unoptimized() {
   determine_indirection "c";
   common_top;
@@ -462,6 +493,22 @@ if ($opts{arch} eq 'x86') {
 } elsif ($opts{arch} =~ /^ppc/ ) {
   @ALL_ARCHS = filter(qw/vsx/);
   ppc;
+} elsif ($opts{arch} =~ /loongarch/ ) {
+  @ALL_ARCHS = filter("$opts{arch}");
+  open CONFIG_FILE, $opts{config} or
+    die "Error opening config file '$opts{config}': $!\n";
+  while (<CONFIG_FILE>) {
+    if (/HAVE_LSX=yes/) {
+      @ALL_ARCHS = filter("$opts{arch}", qw/lsx/);
+      last;
+    }
+    if (/HAVE_LASX=yes/) {
+      @ALL_ARCHS = filter("$opts{arch}", qw/lasx/);
+      last;
+    }
+  }
+  close CONFIG_FILE;
+  loongarch;
 } else {
   unoptimized;
 }