Perl script used to generate FMA instruction patterns

Small perl script used to generate the FMA instruction patterns.  May
come in useful if the spec changes again.

diff --git a/misc/genfma.pl b/misc/genfma.pl
new file mode 100755 (executable)
index 0000000..5cd1e5b
--- /dev/null
+++ b/misc/genfma.pl
@@ -0,0 +1,72 @@
+#!/usr/bin/perl
+%packed_insns = (
+    'vfmadd'    => 0x98,
+    'vfmaddsub' => 0x96,
+    'vfmsubadd' => 0x97,
+    'vfmsub'    => 0x9a,
+    'vfnmadd'   => 0x9c,
+    'vfnmsub'   => 0x9e
+    );
+
+%scalar_insns = (
+    'vfmadd'    => 0x99,
+    'vfmsub'    => 0x9b,
+    'vfmnadd'   => 0x9c,
+    'vfmnsub'   => 0x9f
+    );
+
+foreach $pi ( sort(keys(%packed_insns)) ) {
+    $op = $packed_insns{$pi};
+    foreach $order ('132', '213', '231') {
+       $xorder = substr($order,1,1).substr($order,0,1).substr($order,2,1);
+       foreach $o ($order, $xorder) {
+           for ($w = 0; $w < 2; $w++) {
+               $suf = $w ? 'pd' : 'ps';
+               $mm  = $w ? 'ymm' : 'xmm';
+               $sx  = $w ? 'SY' : 'SO';
+               $ww  = $w ? 256 : 128;
+               printf "%-15s %-31s %-47s %s\n",
+               "\U${pi}${o}${suf}",
+               "${mm}reg,${mm}reg,${mm}rm",
+               sprintf("[rvm:\tvex.dds.%d.66.0f38.w%d %02x /r]",
+                       $ww, $w, $op),
+               "FMA,SANDYBRIDGE,${sx}";
+               printf "%-15s %-31s %-47s %s\n",
+               "\U${pi}${o}${suf}",
+               "${mm}reg,${mm}rm",
+               sprintf("[r+vm:\tvex.dds.%d.66.0f38.w%d %02x /r]",
+                       $ww, $w, $op),
+               "FMA,SANDYBRIDGE,${sx}";
+           }
+       }
+       $op++;
+    }
+}
+
+foreach $si ( sort(keys(%scalar_insns)) ) {
+    $op = $scalar_insns{$si};
+    foreach $order ('132', '213', '231') {
+       $xorder = substr($order,1,1).substr($order,0,1).substr($order,2,1);
+       foreach $o ($order, $xorder) {
+           for ($w = 0; $w < 2; $w++) {
+               $suf = $w ? 'sd' : 'ss';
+               $mm  = 'xmm';
+               $sx  = $w ? 'SQ' : 'SD';
+               $ww  = 128;
+               printf "%-15s %-31s %-47s %s\n",
+               "\U${si}${o}${suf}",
+               "${mm}reg,${mm}reg,${mm}rm",
+               sprintf("[rvm:\tvex.dds.%d.66.0f38.w%d %02x /r]",
+                       $ww, $w, $op),
+               "FMA,SANDYBRIDGE,${sx}";
+               printf "%-15s %-31s %-47s %s\n",
+               "\U${si}${o}${suf}",
+               "${mm}reg,${mm}rm",
+               sprintf("[r+vm:\tvex.dds.%d.66.0f38.w%d %02x /r]",
+                       $ww, $w, $op),
+               "FMA,SANDYBRIDGE,${sx}";
+           }
+       }
+       $op++;
+    }
+}