x86: AVX instruction set decoder support

Add Intel AVX(Advanced Vector Extensions) instruction set
support to x86 instruction decoder. This adds insn.vex_prefix
field for storing VEX prefixes, and introduces some original
tags for expressing opcodes attributes.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
LKML-Reference: <20091027204226.30545.23451.stgit@harusame>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 70 insertions, 24 deletions

diff --git a/arch/x86/tools/gen-insn-attr-x86.awk b/arch/x86/tools/gen-insn-attr-x86.awk
index 7d5492951e22..e34e92a28eb6 100644
--- a/arch/x86/tools/gen-insn-attr-x86.awk
+++ b/arch/x86/tools/gen-insn-attr-x86.awk
@@ -13,6 +13,18 @@ function check_awk_implement() {
         return ""
 }
 
+# Clear working vars
+function clear_vars() {
+        delete table
+        delete lptable2
+        delete lptable1
+        delete lptable3
+        eid = -1 # escape id
+        gid = -1 # group id
+        aid = -1 # AVX id
+        tname = ""
+}
+
 BEGIN {
         # Implementation error checking
         awkchecked = check_awk_implement()
@@ -24,11 +36,15 @@ BEGIN {
 
         # Setup generating tables
         print "/* x86 opcode map generated from x86-opcode-map.txt */"
-        print "/* Do not change this code. */"
+        print "/* Do not change this code. */\n"
         ggid = 1
         geid = 1
+        gaid = 0
+        delete etable
+        delete gtable
+        delete atable
 
-        opnd_expr = "^[[:alpha:]]"
+        opnd_expr = "^[[:alpha:]/]"
         ext_expr = "^\\("
         sep_expr = "^\\|$"
         group_expr = "^Grp[[:alnum:]]+"
@@ -46,19 +62,19 @@ BEGIN {
         imm_flag["Ob"] = "INAT_MOFFSET"
         imm_flag["Ov"] = "INAT_MOFFSET"
 
-        modrm_expr = "^([CDEGMNPQRSUVW][[:lower:]]+|NTA|T[012])"
+        modrm_expr = "^([CDEGMNPQRSUVW/][[:lower:]]+|NTA|T[012])"
         force64_expr = "\\([df]64\\)"
         rex_expr = "^REX(\\.[XRWB]+)*"
         fpu_expr = "^ESC" # TODO
 
         lprefix1_expr = "\\(66\\)"
-        delete lptable1
-        lprefix2_expr = "\\(F2\\)"
-        delete lptable2
-        lprefix3_expr = "\\(F3\\)"
-        delete lptable3
+        lprefix2_expr = "\\(F3\\)"
+        lprefix3_expr = "\\(F2\\)"
         max_lprefix = 4
 
+        vexok_expr = "\\(VEX\\)"
+        vexonly_expr = "\\(oVEX\\)"
+
         prefix_expr = "\\(Prefix\\)"
         prefix_num["Operand-Size"] = "INAT_PFX_OPNDSZ"
         prefix_num["REPNE"] = "INAT_PFX_REPNE"
@@ -71,12 +87,10 @@ BEGIN {
         prefix_num["SEG=GS"] = "INAT_PFX_GS"
         prefix_num["SEG=SS"] = "INAT_PFX_SS"
         prefix_num["Address-Size"] = "INAT_PFX_ADDRSZ"
+        prefix_num["2bytes-VEX"] = "INAT_PFX_VEX2"
+        prefix_num["3bytes-VEX"] = "INAT_PFX_VEX3"
 
-        delete table
-        delete etable
-        delete gtable
-        eid = -1
-        gid = -1
+        clear_vars()
 }
 
 function semantic_error(msg) {
@@ -97,14 +111,12 @@ function array_size(arr,   i,c) {
 
 /^Table:/ {
         print "/* " $0 " */"
+        if (tname != "")
+                semantic_error("Hit Table: before EndTable:.");
 }
 
 /^Referrer:/ {
-        if (NF == 1) {
-                # primary opcode table
-                tname = "inat_primary_table"
-                eid = -1
-        } else {
+        if (NF != 1) {
                 # escape opcode table
                 ref = ""
                 for (i = 2; i <= NF; i++)
@@ -114,6 +126,19 @@ function array_size(arr,   i,c) {
         }
 }
 
+/^AVXcode:/ {
+        if (NF != 1) {
+                # AVX/escape opcode table
+                aid = $2
+                if (gaid <= aid)
+                        gaid = aid + 1
+                if (tname == "")        # AVX only opcode table
+                        tname = sprintf("inat_avx_table_%d", $2)
+        }
+        if (aid == -1 && eid == -1)     # primary opcode table
+                tname = "inat_primary_table"
+}
+
 /^GrpTable:/ {
         print "/* " $0 " */"
         if (!($2 in group))
@@ -162,30 +187,33 @@ function print_table(tbl,name,fmt,n)
                         print_table(table, tname "[INAT_OPCODE_TABLE_SIZE]",
                                     "0x%02x", 256)
                         etable[eid,0] = tname
+                        if (aid >= 0)
+                                atable[aid,0] = tname
                 }
                 if (array_size(lptable1) != 0) {
                         print_table(lptable1,tname "_1[INAT_OPCODE_TABLE_SIZE]",
                                     "0x%02x", 256)
                         etable[eid,1] = tname "_1"
+                        if (aid >= 0)
+                                atable[aid,1] = tname "_1"
                 }
                 if (array_size(lptable2) != 0) {
                         print_table(lptable2,tname "_2[INAT_OPCODE_TABLE_SIZE]",
                                     "0x%02x", 256)
                         etable[eid,2] = tname "_2"
+                        if (aid >= 0)
+                                atable[aid,2] = tname "_2"
                 }
                 if (array_size(lptable3) != 0) {
                         print_table(lptable3,tname "_3[INAT_OPCODE_TABLE_SIZE]",
                                     "0x%02x", 256)
                         etable[eid,3] = tname "_3"
+                        if (aid >= 0)
+                                atable[aid,3] = tname "_3"
                 }
         }
         print ""
-        delete table
-        delete lptable1
-        delete lptable2
-        delete lptable3
-        gid = -1
-        eid = -1
+        clear_vars()
 }
 
 function add_flags(old,new) {
@@ -284,6 +312,14 @@ function convert_operands(opnd,       i,imm,mod)
                 if (match(opcode, fpu_expr))
                         flags = add_flags(flags, "INAT_MODRM")
 
+                # check VEX only code
+                if (match(ext, vexonly_expr))
+                        flags = add_flags(flags, "INAT_VEXOK | INAT_VEXONLY")
+
+                # check VEX only code
+                if (match(ext, vexok_expr))
+                        flags = add_flags(flags, "INAT_VEXOK")
+
                 # check prefixes
                 if (match(ext, prefix_expr)) {
                         if (!prefix_num[opcode])
@@ -330,5 +366,15 @@ END {
                 for (j = 0; j < max_lprefix; j++)
                         if (gtable[i,j])
                                 print " ["i"]["j"] = "gtable[i,j]","
+        print "};\n"
+        # print AVX opcode map's array
+        print "/* AVX opcode map array */"
+        print "const insn_attr_t const *inat_avx_tables[X86_VEX_M_MAX + 1]"\
+              "[INAT_LSTPFX_MAX + 1] = {"
+        for (i = 0; i < gaid; i++)
+                for (j = 0; j < max_lprefix; j++)
+                        if (atable[i,j])
+                                print " ["i"]["j"] = "atable[i,j]","
         print "};"
 }
+