ia32: Correct AM specification of Bsf, Bsr and Popcnt.

ir/be/ia32/ia32_spec.pl

@@ -1153,7 +1153,7 @@ Bsf => {
 	               out => [ "gp", "flags", "none" ] },
 	ins       => [ "base", "index", "mem", "operand" ],
 	outs      => [ "res", "flags", "M" ],
-	am        => "source,binary",
+	am        => "source,unary",
 	emit      => "bsf%M %AS3, %D0",
 	latency   => 1,
 	mode      => $mode_gp,
@@ -1167,7 +1167,7 @@ Bsr => {
 	               out => [ "gp", "flags", "none" ] },
 	ins       => [ "base", "index", "mem", "operand" ],
 	outs      => [ "res", "flags", "M" ],
-	am        => "source,binary",
+	am        => "source,unary",
 	emit      => "bsr%M %AS3, %D0",
 	latency   => 1,
 	mode      => $mode_gp,
@@ -1184,7 +1184,7 @@ Popcnt => {
 	               out => [ "gp", "flags", "none" ] },
 	ins       => [ "base", "index", "mem", "operand" ],
 	outs      => [ "res", "flags", "M" ],
-	am        => "source,binary",
+	am        => "source,unary",
 	emit      => "popcnt%M %AS3, %D0",
 	latency   => 1,
 	mode      => $mode_gp,