x86: re-arrange order of decode for various legacy opcodes

The order of decodes influences the overall number of table entries.
Reduce table size quite a bit by first decoding few-alternatives
attributes common to all valid leaves.

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 7f526d702fd7d9beef447e135a1029fa0f01b644..8c60a69c172df260145451751130e21ab8b7dca8 100644 (file)
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,18 @@
+2021-03-10  Jan Beulich  <jbeulich@suse.com>
+
+       * opcodes/i386-dis.c (REG_0F71, REG_0F72, REG_0F73): Rename to
+       REG_0F71_MOD_0, REG_0F72_MOD_0, and REG_0F73_MOD_0 respectively.
+       (MOD_0F71_REG_2, MOD_0F71_REG_4, MOD_0F71_REG_6, MOD_0F72_REG_2,
+       MOD_0F72_REG_4, MOD_0F72_REG_6, MOD_0F73_REG_2, MOD_0F73_REG_3,
+       MOD_0F73_REG_6, MOD_0F73_REG_7): Delete.
+       (MOD_0F71, MOD_0F72, MOD_0F73): New.
+       (dis386_twobyte): Link to mod_table[] for opcodes 71, 72, and
+       73.
+       (reg_table): No longer link to mod_table[] for opcodes 0F71,
+       0F72, and 0F73.
+       (mod_table): Link to reg_table[] for opcodes 0F71, 0F72, and
+       0F73.
+
 2021-03-10  Jan Beulich  <jbeulich@suse.com>
 
        * opcodes/i386-dis.c (MOD_0F18_REG_4, MOD_0F18_REG_5,

diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index 3d3800efe8e5f354c02561052a2af0594fe87bb0..4f0a4a791216ab4b2550cd3d918ddf15071b0c6a 100644 (file)
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -693,9 +693,9 @@ enum
   REG_0F1E_P_1_MOD_3,
   REG_0F38D8_PREFIX_1,
   REG_0F3A0F_PREFIX_1_MOD_3,
-  REG_0F71,
-  REG_0F72,
-  REG_0F73,
+  REG_0F71_MOD_0,
+  REG_0F72_MOD_0,
+  REG_0F73_MOD_0,
   REG_0FA6,
   REG_0FA7,
   REG_0FAE,
@@ -753,16 +753,9 @@ enum
   MOD_0F2B_PREFIX_2,
   MOD_0F2B_PREFIX_3,
   MOD_0F50,
-  MOD_0F71_REG_2,
-  MOD_0F71_REG_4,
-  MOD_0F71_REG_6,
-  MOD_0F72_REG_2,
-  MOD_0F72_REG_4,
-  MOD_0F72_REG_6,
-  MOD_0F73_REG_2,
-  MOD_0F73_REG_3,
-  MOD_0F73_REG_6,
-  MOD_0F73_REG_7,
+  MOD_0F71,
+  MOD_0F72,
+  MOD_0F73,
   MOD_0FAE_REG_0,
   MOD_0FAE_REG_1,
   MOD_0FAE_REG_2,
@@ -2244,9 +2237,9 @@ static const struct dis386 dis386_twobyte[] = {
   { PREFIX_TABLE (PREFIX_0F6F) },
   /* 70 */
   { PREFIX_TABLE (PREFIX_0F70) },
-  { REG_TABLE (REG_0F71) },
-  { REG_TABLE (REG_0F72) },
-  { REG_TABLE (REG_0F73) },
+  { MOD_TABLE (MOD_0F71) },
+  { MOD_TABLE (MOD_0F72) },
+  { MOD_TABLE (MOD_0F73) },
   { "pcmpeqb",         { MX, EM }, PREFIX_OPCODE },
   { "pcmpeqw",         { MX, EM }, PREFIX_OPCODE },
   { "pcmpeqd",         { MX, EM }, PREFIX_OPCODE },
@@ -2941,36 +2934,36 @@ static const struct dis386 reg_table[][8] = {
   {
     { RM_TABLE (RM_0F3A0F_P_1_MOD_3_REG_0) },
   },
-  /* REG_0F71 */
+  /* REG_0F71_MOD_0 */
   {
     { Bad_Opcode },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F71_REG_2) },
+    { "psrlw",         { MS, Ib }, PREFIX_OPCODE },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F71_REG_4) },
+    { "psraw",         { MS, Ib }, PREFIX_OPCODE },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F71_REG_6) },
+    { "psllw",         { MS, Ib }, PREFIX_OPCODE },
   },
-  /* REG_0F72 */
+  /* REG_0F72_MOD_0 */
   {
     { Bad_Opcode },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F72_REG_2) },
+    { "psrld",         { MS, Ib }, PREFIX_OPCODE },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F72_REG_4) },
+    { "psrad",         { MS, Ib }, PREFIX_OPCODE },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F72_REG_6) },
+    { "pslld",         { MS, Ib }, PREFIX_OPCODE },
   },
-  /* REG_0F73 */
+  /* REG_0F73_MOD_0 */
   {
     { Bad_Opcode },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F73_REG_2) },
-    { MOD_TABLE (MOD_0F73_REG_3) },
+    { "psrlq",         { MS, Ib }, PREFIX_OPCODE },
+    { "psrldq",                { XS, Ib }, PREFIX_DATA },
     { Bad_Opcode },
     { Bad_Opcode },
-    { MOD_TABLE (MOD_0F73_REG_6) },
-    { MOD_TABLE (MOD_0F73_REG_7) },
+    { "psllq",         { MS, Ib }, PREFIX_OPCODE },
+    { "pslldq",                { XS, Ib }, PREFIX_DATA },
   },
   /* REG_0FA6 */
   {
@@ -8261,54 +8254,19 @@ static const struct dis386 mod_table[][2] = {
     { "movmskpX",      { Gdq, XS }, PREFIX_OPCODE },
   },
   {
-    /* MOD_0F71_REG_2 */
+    /* MOD_0F71 */
     { Bad_Opcode },
-    { "psrlw",         { MS, Ib }, PREFIX_OPCODE },
+    { REG_TABLE (REG_0F71_MOD_0) },
   },
   {
-    /* MOD_0F71_REG_4 */
+    /* MOD_0F72 */
     { Bad_Opcode },
-    { "psraw",         { MS, Ib }, PREFIX_OPCODE },
-  },
-  {
-    /* MOD_0F71_REG_6 */
-    { Bad_Opcode },
-    { "psllw",         { MS, Ib }, PREFIX_OPCODE },
+    { REG_TABLE (REG_0F72_MOD_0) },
   },
   {
-    /* MOD_0F72_REG_2 */
+    /* MOD_0F73 */
     { Bad_Opcode },
-    { "psrld",         { MS, Ib }, PREFIX_OPCODE },
-  },
-  {
-    /* MOD_0F72_REG_4 */
-    { Bad_Opcode },
-    { "psrad",         { MS, Ib }, PREFIX_OPCODE },
-  },
-  {
-    /* MOD_0F72_REG_6 */
-    { Bad_Opcode },
-    { "pslld",         { MS, Ib }, PREFIX_OPCODE },
-  },
-  {
-    /* MOD_0F73_REG_2 */
-    { Bad_Opcode },
-    { "psrlq",         { MS, Ib }, PREFIX_OPCODE },
-  },
-  {
-    /* MOD_0F73_REG_3 */
-    { Bad_Opcode },
-    { "psrldq",                { XS, Ib }, PREFIX_DATA },
-  },
-  {
-    /* MOD_0F73_REG_6 */
-    { Bad_Opcode },
-    { "psllq",         { MS, Ib }, PREFIX_OPCODE },
-  },
-  {
-    /* MOD_0F73_REG_7 */
-    { Bad_Opcode },
-    { "pslldq",                { XS, Ib }, PREFIX_DATA },
+    { REG_TABLE (REG_0F73_MOD_0) },
   },
   {
     /* MOD_0FAE_REG_0 */