listing: add the -L+ option to enable all listing options

-L+ or %pragma list options ++ will enable all possible listing
 options.

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

asm/listing.h

@@ -130,7 +130,11 @@ extern uint64_t list_options, active_list_options;
  * (with two bits left over for future use! This isn't particularly
  * efficient code, but just about every instance of it should be
  * fed a constant, so the entire function can be precomputed at
- * compile time.
+ * compile time. The only cases where the full computation is needed
+ * is when parsing the -L option or %pragma list options, neither of
+ * which is in any way performance critical.
+ *
+ * The character + represents ALL listing options.
  *
  * This returns 0 for invalid values, so that no bit is accessed
  * for unsupported characters.
@@ -149,6 +153,8 @@ static inline const_func uint64_t list_option_mask(unsigned char x)
         if (x > '9')
             return 0;
         x = x - '0' + 26*2;
+    } else if (x == '+') {
+        return ~UINT64_C(0);
     } else {
         return 0;
     }

asm/nasm.c

@@ -2025,6 +2025,7 @@ static void help(FILE *out)
         "       -Lf        ignore .nolist (force output)\n"
         "       -Lm        show all single-line macro definitions\n"
         "       -Lp        output a list file every pass, in case of errors\n"
+        "       -L+        enable all listing options (very verbose!)\n"
         "\n"
         "    -Oflags...    optimize opcodes, immediates and branch offsets\n"
         "       -O0        no optimization\n"

test/Makefile

@@ -2,7 +2,7 @@
 
 NASMDEP = ../nasm
 NASM	= ../nasm
-NASMOPT = -Ox -I../misc $(OPT)
+NASMOPT = -Ox -I../misc -L+ $(OPT)
 PERL	= perl
 TESTS	= $(wildcard *.asm)
 RM_F	= rm -f