From 4bba68155df1ff42f84c1dab62423444cde7ea02 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Sat, 12 May 2001 12:07:10 +0000
Subject: [PATCH] 	* i386-dis.c (twobyte_has_modrm): Update table. 
 (need_modrm): Give it file scope. 	(MODRM_CHECK): Define. 	(dofloat): Use
 MODRM_CHECK. 	(OP_E): Likewise. 	(OP_EM): Likewise. 	(OP_EX):
 Likewise. and fix testsuite yet again now that we are getting correct
 disassembly.

---
 gas/testsuite/ChangeLog       |  2 +-
 gas/testsuite/gas/i386/sse2.d |  2 +-
 opcodes/ChangeLog             |  7 +++++++
 opcodes/i386-dis.c            | 28 ++++++++++++++++++++--------
 4 files changed, 29 insertions(+), 10 deletions(-)

diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index c1d821ba74e..51785868aaa 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,7 +1,7 @@
 2001-05-12  Alan Modra  <amodra@one.net.au>
 
 	* gas/i386/sse2.s: Correct cvtps2dq, movdq2q, and movq2dq
-	* gas/i386/sse2.d: Likewise.  Fix pmuludq too.
+	* gas/i386/sse2.d: Likewise.  Fix pmuludq and punpckhqdq too.
 
 	* gas/i386/ssemmx2.d: Correct movq.
 
diff --git a/gas/testsuite/gas/i386/sse2.d b/gas/testsuite/gas/i386/sse2.d
index 4e9365fcce7..b7aa48909d2 100644
--- a/gas/testsuite/gas/i386/sse2.d
+++ b/gas/testsuite/gas/i386/sse2.d
@@ -152,5 +152,5 @@ Disassembly of section .text:
  26b:	f2 0f 70 c8 01[ 	]+pshuflw \$0x1,%xmm0,%xmm1
  270:	66 0f 73 f8 01[ 	]+pslldq \$0x1,%xmm0
  275:	66 0f 73 d8 01[ 	]+psrldq \$0x1,%xmm0
- 27a:	66 0f 6d c8[ 	]+punpckhqdq %xmm0,%xmm3
+ 27a:	66 0f 6d c8[ 	]+punpckhqdq %xmm0,%xmm1
  27e:	89 f6[ 	]+mov[ 	]+%esi,%esi
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index b4f61fc4ce7..ed1b0a87016 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -2,6 +2,13 @@
 
 	* i386-dis.c (prefix_user_table): Correct movq2dq, movdq2q, and
 	movq operands.
+	(twobyte_has_modrm): Update table.
+	(need_modrm): Give it file scope.
+	(MODRM_CHECK): Define.
+	(dofloat): Use MODRM_CHECK.
+	(OP_E): Likewise.
+	(OP_EM): Likewise.
+	(OP_EX): Likewise.
 
 2001-05-07  Frank Ch. Eigler  <fche@redhat.com>
 
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index f1d9e140559..4eb57da3823 100644
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -2228,20 +2228,20 @@ static const unsigned char twobyte_has_modrm[256] = {
   /*       -------------------------------        */
   /* 00 */ 1,1,1,1,0,0,0,0,0,0,0,0,0,1,0,1, /* 0f */
   /* 10 */ 1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0, /* 1f */
-  /* 20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 2f */
+  /* 20 */ 1,1,1,1,1,0,1,0,1,1,1,1,1,1,1,1, /* 2f */
   /* 30 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 3f */
   /* 40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 4f */
-  /* 50 */ 1,1,1,1,1,1,1,1,1,1,0,0,1,1,1,1, /* 5f */
-  /* 60 */ 1,1,1,1,1,1,1,1,1,1,1,1,0,0,1,1, /* 6f */
+  /* 50 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 5f */
+  /* 60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 6f */
   /* 70 */ 1,1,1,1,1,1,1,0,0,0,0,0,0,0,1,1, /* 7f */
   /* 80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 8f */
   /* 90 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 9f */
-  /* a0 */ 0,0,0,1,1,1,1,1,0,0,0,1,1,1,1,1, /* af */
+  /* a0 */ 0,0,0,1,1,1,0,0,0,0,0,1,1,1,1,1, /* af */
   /* b0 */ 1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,1, /* bf */
   /* c0 */ 1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0, /* cf */
-  /* d0 */ 0,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1, /* df */
-  /* e0 */ 1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1, /* ef */
-  /* f0 */ 0,1,1,1,0,1,1,1,1,1,1,1,1,1,1,0  /* ff */
+  /* d0 */ 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* df */
+  /* e0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* ef */
+  /* f0 */ 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0  /* ff */
   /*       -------------------------------        */
   /*       0 1 2 3 4 5 6 7 8 9 a b c d e f        */
 };
@@ -2279,8 +2279,14 @@ static disassemble_info *the_info;
 static int mod;
 static int rm;
 static int reg;
+static unsigned char need_modrm;
 static void oappend PARAMS ((const char *s));
 
+/* If we are accessing mod/rm/reg without need_modrm set, then the
+   values are stale.  Hitting this abort likely indicates that you
+   need to update onebyte_has_modrm or twobyte_has_modrm.  */
+#define MODRM_CHECK  if (!need_modrm) abort ()
+
 static const char *names64[] = {
   "%rax","%rcx","%rdx","%rbx", "%rsp","%rbp","%rsi","%rdi",
   "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
@@ -2989,7 +2995,6 @@ print_insn_i386 (pc, info)
   int two_source_ops;
   char *first, *second, *third;
   int needcomma;
-  unsigned char need_modrm;
   unsigned char uses_SSE_prefix;
   VOLATILE int sizeflag;
   VOLATILE int orig_sizeflag;
@@ -3624,6 +3629,8 @@ dofloat (sizeflag)
         OP_E (v_mode, sizeflag);
       return;
     }
+  /* skip mod/rm byte */
+  MODRM_CHECK;
   codep++;
 
   dp = &float_reg[floatop - 0xd8][reg];
@@ -4038,6 +4045,7 @@ OP_E (bytemode, sizeflag)
     add += 8;
 
   /* skip mod/rm byte */
+  MODRM_CHECK;
   codep++;
 
   if (mod == 3)
@@ -4927,6 +4935,8 @@ OP_EM (bytemode, sizeflag)
   if (rex & REX_EXTZ)
     add = 8;
 
+  /* skip mod/rm byte */
+  MODRM_CHECK;
   codep++;
   used_prefixes |= (prefixes & PREFIX_DATA);
   if (prefixes & PREFIX_DATA)
@@ -4951,6 +4961,8 @@ OP_EX (bytemode, sizeflag)
   if (rex & REX_EXTZ)
     add = 8;
 
+  /* skip mod/rm byte */
+  MODRM_CHECK;
   codep++;
   sprintf (scratchbuf, "%%xmm%d", rm + add);
   oappend (scratchbuf);
-- 
2.30.2