gas/testsuite/

[binutils-gdb.git] / opcodes / i386-dis.c

diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index 24e5a393ed211e9712ea1fd71810a87f0ca5f897..a2a5a06f72612bf9fff4814ddd3e2d5811ac93bf 100644 (file)
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -97,6 +97,7 @@ static void SIMD_Fixup (int, int);
 static void PNI_Fixup (int, int);
 static void INVLPG_Fixup (int, int);
 static void BadOp (void);
+static void SEG_Fixup (int, int);
 
 struct dis_private {
   /* Points to first byte not fetched.  */
@@ -221,6 +222,7 @@ fetch_data (struct disassemble_info *info, bfd_byte *addr)
 #define Cm OP_C, m_mode
 #define Dm OP_D, m_mode
 #define Td OP_T, d_mode
+#define Sv SEG_Fixup, v_mode
 
 #define RMeAX OP_REG, eAX_reg
 #define RMeBX OP_REG, eBX_reg
@@ -642,9 +644,9 @@ static const struct dis386 dis386[] = {
   { "movS",            Ev, Gv, XX },
   { "movB",            Gb, Eb, XX },
   { "movS",            Gv, Ev, XX },
-  { "movQ",            Ev, Sw, XX },
+  { "movQ",            Sv, Sw, XX },
   { "leaS",            Gv, M, XX },
-  { "movQ",            Sw, Ev, XX },
+  { "movQ",            Sw, Sv, XX },
   { "popU",            Ev, XX, XX },
   /* 90 */
   { "nop",             NOP_Fixup, 0, XX, XX },
@@ -4411,3 +4413,52 @@ BadOp (void)
   codep = insn_codep + 1;
   oappend ("(bad)");
 }
+
+static void
+SEG_Fixup (int extrachar, int sizeflag)
+{
+  if (mod == 3)
+    {
+      /* We need to add a proper suffix with
+
+               movw %ds,%ax
+               movl %ds,%eax
+               movq %ds,%rax
+               movw %ax,%ds
+               movl %eax,%ds
+               movq %rax,%ds
+       */
+      const char *suffix;
+
+      if (prefixes & PREFIX_DATA)
+       suffix = "w";
+      else
+       {
+         USED_REX (REX_MODE64);
+         if (rex & REX_MODE64)
+           suffix = "q";
+         else
+           suffix = "l";
+       }
+      strcat (obuf, suffix);
+    }
+  else
+    {
+      /* We need to fix the suffix for
+
+               movw %ds,(%eax)
+               movw %ds,(%rax)
+               movw (%eax),%ds
+               movw (%rax),%ds
+
+        Override "mov[l|q]".  */
+      char *p = obuf + strlen (obuf) - 1;
+
+      /* We might not have a suffix.  */
+      if (*p == 'v')
+       ++p;
+      *p = 'w';
+    }
+
+  OP_E (extrachar, sizeflag);
+}