From: H. Peter Anvin <hpa@zytor.com>
Date: Sun, 24 Nov 2013 19:49:24 +0000 (-0800)
Subject: iflag: remove C99 constructs, don't hardcode the number of words
X-Git-Tag: nasm-2.11.05~58
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8b0e5a34fcbc66e04cec3fc297c20a34e79c4dc0;p=platform%2Fupstream%2Fnasm.git

iflag: remove C99 constructs, don't hardcode the number of words

Avoid using C99 constructs when not necessary.  Don't hardcode the
number of words when we can autodiscover them.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

diff --git a/iflag.h b/iflag.h
index d08249e..72929ee 100644
--- a/iflag.h
+++ b/iflag.h
@@ -37,10 +37,6 @@ int ilog2_32(uint32_t v);
  *
  * iflag_t is defined to store these flags.
  */
-typedef struct {
-    uint32_t field[4];
-} iflag_t;
-
 #include "iflaggen.h"
 
 #define IF_GENBIT(bit)          (UINT32_C(1) << (bit))
diff --git a/insns-iflags.pl b/insns-iflags.pl
index 77eefee..632bba3 100644
--- a/insns-iflags.pl
+++ b/insns-iflags.pl
@@ -135,6 +135,19 @@ my %insns_flag_bit = (
 
 my %insns_flag_hash = ();
 my @insns_flag_values = ();
+my $iflag_words;
+
+sub get_flag_words() {
+    my $max = -1;
+
+    foreach my $key (keys(%insns_flag_bit)) {
+	if (${$insns_flag_bit{$key}}[0] > $max) {
+	    $max = ${$insns_flag_bit{$key}}[0];
+	}
+    }
+
+    return int($max/32)+1;
+}
 
 sub insns_flag_index(@) {
     return undef if $_[0] eq "ignore";
@@ -143,34 +156,16 @@ sub insns_flag_index(@) {
     my $key = join("", @prekey);
 
     if (not defined($insns_flag_hash{$key})) {
-        my @newkey = ([], [], [], []);
-        my $str = "";
+        my @newkey = (0) x $iflag_words;
 
         for my $i (@prekey) {
             die "No key for $i\n" if not defined($insns_flag_bit{$i});
-            if ($insns_flag_bit{$i}[0] <       32) {
-                push @newkey[0], $insns_flag_bit{$i}[0] -  0;
-            } elsif ($insns_flag_bit{$i}[0] <  64) {
-                push @newkey[1], $insns_flag_bit{$i}[0] - 32;
-            } elsif ($insns_flag_bit{$i}[0] <  96) {
-                push @newkey[2], $insns_flag_bit{$i}[0] - 64;
-            } elsif ($insns_flag_bit{$i}[0] < 128) {
-                push @newkey[3], $insns_flag_bit{$i}[0] - 96;
-            } else {
-                die "Key value is too big ", $insns_flag_bit{$i}[0], "\n";
-            }
-        }
-
-        for my $j (0 .. $#newkey) {
-            my $v = "";
-            if (scalar(@{$newkey[$j]})) {
-                $v = join(" | ", map { map { sprintf("(UINT32_C(1) << %d)", $_) } @$_; } $newkey[$j]);
-            } else {
-                $v = "0";
-            }
-            $str .= sprintf(".field[%d] = %s, ", $j, $v);
+	    $newkey[$insns_flag_bit{$i}[0]/32] |=
+		(1 << ($insns_flag_bit{$i}[0] % 32));
         }
 
+	my $str = join(',', map { sprintf("UINT32_C(0x%08x)",$_) } @newkey);
+	
         push @insns_flag_values, $str;
         $insns_flag_hash{$key} = $#insns_flag_values;
     }
@@ -193,8 +188,12 @@ sub write_iflaggen_h() {
     }
 
     print N "\n";
-    print N sprintf("extern iflag_t insns_flags[%d];\n\n",
-		    $#insns_flag_values + 1);
+    print N "typedef struct {\n";
+    printf N "    uint32_t field[%d];\n", $iflag_words;
+    print N "} iflag_t;\n";
+
+    print N "\n";
+    printf N "extern iflag_t insns_flags[%d];\n\n", $#insns_flag_values + 1;
 
     print N "#endif /* NASM_IFLAGGEN_H */\n";
     close N;
@@ -210,10 +209,12 @@ sub write_iflag_c() {
     print N "/* Global flags referenced from instruction templates */\n";
     print N sprintf("iflag_t insns_flags[%d] = {\n", $#insns_flag_values + 1);
     foreach my $i (0 .. $#insns_flag_values) {
-        print N sprintf("    [%8d] = { %s },\n", $i, $insns_flag_values[$i]);
+        print N sprintf("    /* %4d */ {{ %s }},\n", $i, $insns_flag_values[$i]);
     }
     print N "};\n\n";
     close N;
 }
 
+$iflag_words = get_flag_words();
+
 1;