x86-64: Use long NOPs for Intel Core processors

Use long NOPs for Intel Core processors since they are faster than
multiple NOPs.  Don't use them for 64-bit processors by default since
Intel Atom processors can only decode 4 prefixes in 1 cycle.

	* config/tc-i386.c (alt64_9): New.
	(alt64_10): Likewise.
	(alt64_11): Likewise.
	(alt64_12): Likewise.
	(alt64_13): Likewise.
	(alt64_14): Likewise.
	(alt64_15): Likewise.
	(alt64_patt): Likewise.
	(i386_generate_nops): Use alt64_patt for Intel Core processors
	in 64-bit mode.
	* testsuite/gas/i386/x86-64-nops-1-core2.d: Expect long NOPs.
	* testsuite/gas/i386/x86-64-nops-4-core2.d: Likewise.
	* testsuite/gas/i386/ilp32/x86-64-nops-1-core2.d: Replace
	../x86-64-nops-1.d with ../x86-64-nops-1-core2.d.
	* testsuite/gas/i386/ilp32/x86-64-nops-4-core2.d: Replace
	../x86-64-nops-4.d with ../x86-64-nops-4-core2.d.

diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 8f6337b34af46f021713038faf6484a7bc74ead4..56b2431b1bcbdaf2d6378b0e9ce0d03d4669431b 100644 (file)
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -1356,6 +1356,25 @@ static const unsigned char *const alt_patt[] = {
   f32_1, f32_2, alt_3, alt_4, alt_5, alt_6, alt_7, alt_8,
   alt_9, alt_10, alt_11
 };
+#define alt64_9 (alt64_15 + 6)         /* nopq 0L(%rax,%rax,1)  */
+#define alt64_10 (alt64_15 + 5)                /* cs nopq 0L(%rax,%rax,1)  */
+/* data16 cs nopq 0L(%rax,%rax,1)  */
+#define alt64_11 (alt64_15 + 4)
+/* data16 data16 cs nopq 0L(%rax,%rax,1)  */
+#define alt64_12 (alt64_15 + 3)
+/* data16 data16 data16 cs nopq 0L(%rax,%rax,1)  */
+#define alt64_13 (alt64_15 + 2)
+/* data16 data16 data16 data16 cs nopq 0L(%rax,%rax,1)  */
+#define alt64_14 (alt64_15 + 1)
+/* data16 data16 data16 data16 data16 cs nopq 0L(%rax,%rax,1)  */
+static const unsigned char alt64_15[] =
+  {0x66,0x66,0x66,0x66,0x66,0x2e,0x48,
+   0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00};
+/* Long 64-bit NOPs patterns.  */
+static const unsigned char *const alt64_patt[] = {
+  f32_1, f32_2, alt_3, alt_4, alt_5, alt_6, alt_7, alt_8,
+  alt64_9, alt64_10, alt64_11,alt64_12, alt64_13, alt64_14, alt64_15
+};
 
 /* Genenerate COUNT bytes of NOPs to WHERE from PATT with the maximum
    size of a single NOP instruction MAX_SINGLE_NOP_SIZE.  */
@@ -1466,12 +1485,21 @@ i386_generate_nops (fragS *fragP, char *where, offsetT count, int limit)
                patt = alt_patt;
              break;
 
-           case PROCESSOR_PENTIUMPRO:
-           case PROCESSOR_PENTIUM4:
-           case PROCESSOR_NOCONA:
            case PROCESSOR_CORE:
            case PROCESSOR_CORE2:
            case PROCESSOR_COREI7:
+             if (fragP->tc_frag_data.cpunop)
+               {
+                 if (fragP->tc_frag_data.code == CODE_64BIT)
+                   patt = alt64_patt;
+                 else
+                   patt = alt_patt;
+               }
+             break;
+
+           case PROCESSOR_PENTIUMPRO:
+           case PROCESSOR_PENTIUM4:
+           case PROCESSOR_NOCONA:
            case PROCESSOR_GENERIC64:
            case PROCESSOR_K6:
            case PROCESSOR_ATHLON:
@@ -1517,7 +1545,7 @@ i386_generate_nops (fragS *fragP, char *where, offsetT count, int limit)
            }
        }
 
-      if (patt != alt_patt)
+      if (patt != alt_patt && patt != alt64_patt)
        {
          max_single_nop_size = patt == f32_patt ? ARRAY_SIZE (f32_patt)
                                                 : ARRAY_SIZE (f64_patt);
@@ -1526,7 +1554,9 @@ i386_generate_nops (fragS *fragP, char *where, offsetT count, int limit)
        }
       else
        {
-         max_single_nop_size = sizeof (alt_patt) / sizeof (alt_patt[0]);
+         max_single_nop_size = patt == alt_patt
+                               ? ARRAY_SIZE (alt_patt)
+                               : ARRAY_SIZE (alt64_patt);
          /* Limit number of NOPs to 7 for newer processors.  */
          max_number_of_nops = 7;
        }

diff --git a/gas/testsuite/gas/i386/ilp32/x86-64-nops-1-core2.d b/gas/testsuite/gas/i386/ilp32/x86-64-nops-1-core2.d
index aec0817e292708e0083b117b24d138673aac0cbf..81aa9dc8353d926fc0511bfa15bbceb8d3f399f8 100644 (file)
--- a/gas/testsuite/gas/i386/ilp32/x86-64-nops-1-core2.d
+++ b/gas/testsuite/gas/i386/ilp32/x86-64-nops-1-core2.d
@@ -2,4 +2,4 @@
 #as: -mtune=core2
 #objdump: -drw
 #name: x86-64 (ILP32) -mtune=core2 nops 1
-#dump: ../x86-64-nops-1.d
+#dump: ../x86-64-nops-1-core2.d

diff --git a/gas/testsuite/gas/i386/ilp32/x86-64-nops-4-core2.d b/gas/testsuite/gas/i386/ilp32/x86-64-nops-4-core2.d
index 324267a501ecc46ac898c1cf5fd8a3a990c3a6b6..246c7e8c0b09ac4e9cfa3840d55af988f6911fca 100644 (file)
--- a/gas/testsuite/gas/i386/ilp32/x86-64-nops-4-core2.d
+++ b/gas/testsuite/gas/i386/ilp32/x86-64-nops-4-core2.d
@@ -2,4 +2,4 @@
 #as: -mtune=core2
 #objdump: -drw
 #name: x86-64 (ILP32) nops -mtune=core2 4
-#dump: ../x86-64-nops-4.d
+#dump: ../x86-64-nops-4-core2.d

diff --git a/gas/testsuite/gas/i386/x86-64-nops-1-core2.d b/gas/testsuite/gas/i386/x86-64-nops-1-core2.d
index ec632b29cf521151d9e6d66d9048ea2f103b7465..3fe7f3f6f31176971663986de7d0fb99cc7f22ec 100644 (file)
--- a/gas/testsuite/gas/i386/x86-64-nops-1-core2.d
+++ b/gas/testsuite/gas/i386/x86-64-nops-1-core2.d
@@ -2,4 +2,156 @@
 #source: nops-1.s
 #objdump: -drw
 #name: x86-64 -mtune=core2 nops 1
-#dump: x86-64-nops-1.d
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <nop15>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+10 <nop14>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00       data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+20 <nop13>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 2e 48 0f 1f 84 00 00 00 00 00  data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+30 <nop12>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 2e 48 0f 1f 84 00 00 00 00 00     data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+40 <nop11>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 2e 48 0f 1f 84 00 00 00 00 00        data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+50 <nop10>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   2e 48 0f 1f 84 00 00 00 00 00   cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+60 <nop9>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   48 0f 1f 84 00 00 00 00 00      nopq   (0x)?0\(%rax,%rax,1\)
+
+0+70 <nop8>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   0f 1f 84 00 00 00 00 00         nopl   (0x)?0\(%rax,%rax,1\)
+
+0+80 <nop7>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   0f 1f 80 00 00 00 00    nopl   (0x)?0\(%rax\)
+
+0+90 <nop6>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 0f 1f 44 00 00       nopw   (0x)?0\(%rax,%rax,1\)
+
+0+a0 <nop5>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   0f 1f 44 00 00          nopl   (0x)?0\(%rax,%rax,1\)
+
+0+b0 <nop4>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   0f 1f 40 00             nopl   (0x)?0\(%rax\)
+
+0+c0 <nop3>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   0f 1f 00                nopl   \(%rax\)
+
+0+d0 <nop2>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 90                   xchg   %ax,%ax
+#pass

diff --git a/gas/testsuite/gas/i386/x86-64-nops-4-core2.d b/gas/testsuite/gas/i386/x86-64-nops-4-core2.d
index 010b686db2f6059edf42607389288acd6a1fae26..8154ca9eb6b4e430e85528272f91d97ef8ceaa4b 100644 (file)
--- a/gas/testsuite/gas/i386/x86-64-nops-4-core2.d
+++ b/gas/testsuite/gas/i386/x86-64-nops-4-core2.d
@@ -2,4 +2,210 @@
 #source: nops-4.s
 #objdump: -drw
 #name: x86-64 nops -mtune=core2 4
-#dump: x86-64-nops-4.d
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <nop31>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   90                      nop
+
+0+20 <nop30>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+40 <nop29>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00       data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+60 <nop28>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 66 66 2e 48 0f 1f 84 00 00 00 00 00  data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+80 <nop27>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 66 2e 48 0f 1f 84 00 00 00 00 00     data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+a0 <nop26>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 2e 48 0f 1f 84 00 00 00 00 00        data16 cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+c0 <nop25>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   2e 48 0f 1f 84 00 00 00 00 00   cs nopq (0x)?0\(%rax,%rax,1\)
+
+0+e0 <nop24>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   48 0f 1f 84 00 00 00 00 00      nopq   (0x)?0\(%rax,%rax,1\)
+
+0+100 <nop23>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   0f 1f 84 00 00 00 00 00         nopl   (0x)?0\(%rax,%rax,1\)
+
+0+120 <nop22>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   0f 1f 80 00 00 00 00    nopl   (0x)?0\(%rax\)
+
+0+140 <nop21>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 0f 1f 44 00 00       nopw   (0x)?0\(%rax,%rax,1\)
+
+0+160 <nop20>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   0f 1f 44 00 00          nopl   (0x)?0\(%rax,%rax,1\)
+
+0+180 <nop19>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   0f 1f 40 00             nopl   (0x)?0\(%rax\)
+
+0+1a0 <nop18>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   0f 1f 00                nopl   \(%rax\)
+
+0+1c0 <nop17>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   66 90                   xchg   %ax,%ax
+
+0+1e0 <nop16>:
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   90                      nop
+ +[a-f0-9]+:   66 66 66 66 66 2e 48 0f 1f 84 00 00 00 00 00    data16 data16 data16 data16 data16 cs nopq (0x)?0\(%rax,%rax,1\)
+ +[a-f0-9]+:   90                      nop
+#pass