New stuff for SH.

1 files changed, 703 insertions, 0 deletions

diff --git a/sim/sh/gencode.c b/sim/sh/gencode.c
new file mode 100644
index 0000000000..8b495e5dad
--- /dev/null
+++ b/sim/sh/gencode.c
@@ -0,0 +1,703 @@
+/* Simulator/Opcode generator for the Hitachi Super-H architecture.
+
+   Written by Steve Chamberlain of Cygnus Support.
+   sac@cygnus.com
+
+   This file is part of SH sim
+
+
+		THIS SOFTWARE IS NOT COPYRIGHTED
+
+   Cygnus offers the following for use in the public domain.  Cygnus
+   makes no warranty with regard to the software or it's performance
+   and the user accepts the software "AS IS" with all faults.
+
+   CYGNUS DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD TO
+   THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+   MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+
+*/
+
+/* This program generates the opcode table for the assembler and
+   the simulator code
+
+   -t		prints a pretty table for the assembler manual
+   -s		generates the simulator code jump table
+   -x		generates the simulator code switch statement
+   default 	generates the opcode tables
+
+*/
+
+typedef struct
+{
+  char *name;
+  char *code;
+  char *stuff[10];
+  int index;
+}
+
+op;
+
+
+op tab[] =
+{
+
+  {"add #<imm>,<REG_N>", "0111nnnni8*1....", "R[n] += SEXT(i);"},
+  {"add <REG_M>,<REG_N>", "0011nnnnmmmm1100", "R[n] += R[m];"},
+  {"addc <REG_M>,<REG_N>", "0011nnnnmmmm1110", "ult = R[n]; R[n] += (R[m]+T); T = ult>R[n];"},
+  {"addv <REG_M>,<REG_N>", "0011nnnnmmmm1111",
+   "long ans;",
+   "ans = R[n] + R[m];",
+   "T = ((~R[n] & R[m] & ans) | (R[n] & R[m] & ~ans)) >>31;",
+   "R[n] = ans;"},
+
+  {"and #<imm>,R0", "11001001i8*1....", "R0&=i;"},
+  {"and <REG_M>,<REG_N>", "0010nnnnmmmm1001", "R[n]&=R[m];"},
+  {"and.b #<imm>,@(R0,GBR)", "11001101i8*1....", "WBAT(GBR+R0, RBAT(GBR+R0) & i);"},
+
+  {"bf <bdisp8>", "10001011i8p1....", "if(T==0) {PC+=(SEXT(i)<<1)+2;C+=2;}"},
+  {"bra <bdisp12>", "1010i12.........", "ult = PC; PC=PC+(i<<1)+2;SL(ult+2);"},
+  {"bsr <bdisp12>", "1011i12.........", "PR = PC; PC=PC+(i<<1)+2;SL(PR+2);"},
+  {"bt <bdisp8>", "10001001i8p1....", "if(T==1) {PC+=(SEXT(i)<<1)+2;C+=2;}"},
+  {"clrmac", "0000000000101000", "MACH = MACL = 0;"},
+  {"clrt", "0000000000001000", "T= 0;"},
+  {"cmp/eq #<imm>,R0", "10001000i8*1....", "T = R0 == SEXT(i);"},
+  {"cmp/eq <REG_M>,<REG_N>", "0011nnnnmmmm0000", "T=R[n]==R[m];"},
+  {"cmp/ge <REG_M>,<REG_N>", "0011nnnnmmmm0011", "T=R[n]>=R[m];"},
+  {"cmp/gt <REG_M>,<REG_N>", "0011nnnnmmmm0111", "T=R[n]>R[m];"},
+  {"cmp/hi <REG_M>,<REG_N>", "0011nnnnmmmm0110", "T=UR[n]>UR[m];"},
+  {"cmp/hs <REG_M>,<REG_N>", "0011nnnnmmmm0010", "T=UR[n]>=UR[m];"},
+  {"cmp/pl <REG_N>", "0100nnnn00010101", "T = R[n]>0;"},
+  {"cmp/pz <REG_N>", "0100nnnn00010001", "T = R[n]>=0;"},
+  {"cmp/str <REG_M>,<REG_N>", "0010nnnnmmmm1100", "ult = R[n] ^ R[m]; T=((ult&0xff000000)==0) |((ult&0xff0000)==0) |((ult&0xff00)==0) |((ult&0xff)==0); "},
+  {"div0s <REG_M>,<REG_N>", "0010nnnnmmmm0111", "Q=R[n]<0; M=R[m]<0; T=M!=Q;;"},
+  {"div0u", "0000000000011001", "M=Q=T=0;"},
+  {"div1 <REG_M>,<REG_N>", "0011nnnnmmmm0100", "T=div1(R,n,m,T);"},
+  {"exts.b <REG_M>,<REG_N>", "0110nnnnmmmm1110", "R[n] = SEXT(R[m]);"},
+  {"exts.w <REG_M>,<REG_N>", "0110nnnnmmmm1111", "R[n] = SEXTW(R[m]);"},
+  {"extu.b <REG_M>,<REG_N>", "0110nnnnmmmm1100", "R[n] = R[m] & 0xff;"},
+  {"extu.w <REG_M>,<REG_N>", "0110nnnnmmmm1101", "R[n] = R[m] & 0xffff;"},
+  {"jmp @<REG_N>", "0100nnnn00101011", "ult = PC; PC=R[n]-2; SL(ult+2);"},
+  {"jsr @<REG_N>", "0100nnnn00001011", "PR = PC; PC=R[n]-2; SL(PR+2);"},
+  {"ldc <REG_N>,GBR", "0100nnnn00011110", "GBR=R[n];"},
+  {"ldc <REG_N>,SR", "0100nnnn00001110", "SET_SR(R[n]);"},
+  {"ldc <REG_N>,VBR", "0100nnnn00101110", "VBR=R[n];"},
+  {"ldc.l @<REG_N>+,GBR", "0100nnnn00010111", "GBR=RLAT(R[n]);R[n]+=4;;"},
+  {"ldc.l @<REG_N>+,SR", "0100nnnn00000111", "SET_SR(RLAT(R[n]));R[n]+=4;;"},
+  {"ldc.l @<REG_N>+,VBR", "0100nnnn00100111", "VBR=RLAT(R[n]);R[n]+=4;;"},
+  {"lds <REG_N>,MACH", "0100nnnn00001010", "MACH = SEXT(R[n]);"},
+  {"lds <REG_N>,MACL", "0100nnnn00011010", "MACL= R[n];"},
+  {"lds <REG_N>,PR", "0100nnnn00101010", "PR = R[n];"},
+  {"lds.l @<REG_N>+,MACH", "0100nnnn00000110", "MACH = SEXT(RLAT(R[n]));R[n]+=4;"},
+  {"lds.l @<REG_N>+,MACL", "0100nnnn00010110", "MACL = RLAT(R[n]);R[n]+=4;"},
+  {"lds.l @<REG_N>+,PR", "0100nnnn00100110", "PR = RLAT(R[n]);R[n]+=4;;"},
+  {"mac.w @<REG_M>+,@<REG_N>+", "0100nnnnmmmm1111", "abort();"},
+  {"mov #<imm>,<REG_N>", "1110nnnni8*1....", "R[n] = SEXT(i);"},
+  {"mov <REG_M>,<REG_N>", "0110nnnnmmmm0011", "R[n] = R[m];"},
+{"mov.b <REG_M>,@(R0,<REG_N>)", "0000nnnnmmmm0100", "WBAT(R[n]+R0, R[m]);"},
+{"mov.b <REG_M>,@-<REG_N>", "0010nnnnmmmm0100", "R[n]--; WBAT(R[n], R[m]);"},
+  {"mov.b <REG_M>,@<REG_N>", "0010nnnnmmmm0000", "WBAT(R[n], R[m]);"},
+  {"mov.b @(<disp>,<REG_M>),R0", "10000100mmmmi4*1", "R0=RBAT(i+R[m]);"},
+  {"mov.b @(<disp>,GBR),R0", "11000100i8*1....", "R0=RBAT(i+GBR);"},
+  {"mov.b @(R0,<REG_M>),<REG_N>", "0000nnnnmmmm1100", "R[n]=RBAT(R0+R[m]);"},
+{"mov.b @<REG_M>+,<REG_N>", "0110nnnnmmmm0100", "R[n] = RBAT(R[m]);R[m]++;"},
+  {"mov.b @<REG_M>,<REG_N>", "0110nnnnmmmm0000", "R[n]=RBAT(R[m]);"},
+  {"mov.b R0,@(<disp>,<REG_M>)", "10000000mmmmi4*1", "R0=RBAT(i+R[m]);"},
+  {"mov.b R0,@(<disp>,GBR)", "11000000i8*1....", "R0 = RBAT(i+GBR);"},
+  {"mov.l <REG_M>,@(<disp>,<REG_N>)", "0001nnnnmmmmi4*4", "WLAT(i+R[n],R[m]);"},
+  {"mov.l <REG_M>,@(R0,<REG_N>)", "0000nnnnmmmm0110", "WLAT(R0+R[n],R[m]);"},
+{"mov.l <REG_M>,@-<REG_N>", "0010nnnnmmmm0110", "R[n]-=4;WLAT(R[n],R[m]);"},
+  {"mov.l <REG_M>,@<REG_N>", "0010nnnnmmmm0010", "WLAT(R[n], R[m]);"},
+  {"mov.l @(<disp>,<REG_N>),<REG_M>", "0101nnnnmmmmi4*4", "R[m]=RLAT(i+R[n]);"},
+  {"mov.l @(<disp>,GBR),R0", "11000110i4*4", "R0=RLAT(i+GBR);"},
+  {"mov.l @(<disp>,PC),<REG_N>", "1101nnnni8p4....", "R[n]=RLAT(i+4+PC);"},
+  {"mov.l @(R0,<REG_M>),<REG_N>", "0000nnnnmmmm1110", "R[n]=RLAT(R0+R[m]);"},
+{"mov.l @<REG_M>+,<REG_N>", "0110nnnnmmmm0110", "R[n]=RLAT(R[m]);R[m]+=4;"},
+  {"mov.l @<REG_M>,<REG_N>", "0110nnnnmmmm0010", "R[n]=RLAT(R[m]);"},
+  {"mov.l R0,@(<disp>,GBR)", "11000010i8*4....", "R0=RLAT(R0+GBR);"},
+  {"mov.w <REG_M>,@(R0,<REG_N>)", "0000nnnnmmmm0101", "WWAT(R0+R[n],R[m]);"},
+{"mov.w <REG_M>,@-<REG_N>", "0010nnnnmmmm0101", "R[n]-=2;WWAT(R[n],R[m]);"},
+  {"mov.w <REG_M>,@<REG_N>", "0010nnnnmmmm0001", "WWAT(R[n],R[m]);"},
+  {"mov.w @(<disp>,<REG_M>),R0", "10000101mmmmi4*2", "R0=RSWAT(i+R[m]);"},
+  {"mov.w @(<disp>,GBR),R0", "11000101i8*2....", "R0=RSWAT(i+GBR);"},
+  {"mov.w @(<disp>,PC),<REG_N>", "1001nnnni8p2....", "R[n]=RSWAT(PC+i+4);"},
+{"mov.w @(R0,<REG_M>),<REG_N>", "0000nnnnmmmm1101", "R[n]=RSWAT(R0+R[m]);"},
+{"mov.w @<REG_M>+,<REG_N>", "0110nnnnmmmm0101", "R[n]=RSWAT(R[m]);R[m]+=2;"},
+  {"mov.w @<REG_M>,<REG_N>", "0110nnnnmmmm0001", "R[n]=RSWAT(R[m]);"},
+  {"mov.w R0,@(<disp>,<REG_M>)", "10000001mmmmi4*2", "R0=RSWAT(i+R[m]);"},
+  {"mov.w R0,@(<disp>,GBR)", "11000001i8*2....", "R0=RSWAT(i+GBR);"},
+  {"mova @(<disp>,PC),R0", "11000111i8p4....", "R0=i+4+PC;"},
+  {"movt <REG_N>", "0000nnnn00101001", "R[n]=T;"},
+  {"muls <REG_M>,<REG_N>", "0010nnnnmmmm1111",
+   "MACL=((long)(short)R[n])*((long)(short)R[m]);"},
+{"mulu <REG_M>,<REG_N>","0010nnnnmmmm1110", "MACL=((unsigned long)(unsigned short)R[n])*((unsigned long)(unsigned short)R[m]);"},  
+  {"neg <REG_M>,<REG_N>", "0110nnnnmmmm1011", "R[n] = - R[m];"},
+  {"negc <REG_M>,<REG_N>", "0110nnnnmmmm1010",  "ult=0-R[m];R[n]=ult-T;T=SBIT(R[n])!=SBIT(ult);"},
+  {"nop", "0000000000001001", ""},
+  {"not <REG_M>,<REG_N>", "0110nnnnmmmm0111", "R[n]=~R[m];"},
+  {"or #<imm>,R0", "11001011i8*1....", "R0|=i;"},
+  {"or <REG_M>,<REG_N>", "0010nnnnmmmm1011", "R[n]|=R[m];"},
+  {"or.b #<imm>,@(R0,GBR)", "11001111i8*1....", "WBAT(R0+GBR,RBAT(R0+GBR)|i);"},
+  {"rotcl <REG_N>", "0100nnnn00100100", "ult = R[n] <0;R[n] = (R[n]<<1)|T;T=ult;"},
+  {"rotcr <REG_N>", "0100nnnn00100101", "ult = R[n]&1;R[n]=(UR[n]>>1)|(T<<31);T=ult;"},
+  {"rotl <REG_N>", "0100nnnn00000100", "T=R[n]<0;R[n]<<=1;R[n]|=T;"},
+  {"rotr <REG_N>", "0100nnnn00000101", "T=R[n]&1;UR[n]>>=1;R[n]|=(T<<31);"},
+  {"rte", "0000000000101011", "abort();"},
+  {"rts", "0000000000001011", "ult=PC;PC=PR+2;SL(ult+2);"},
+  {"sett", "0000000000011000", "T=1;"},
+  {"shal <REG_N>", "0100nnnn00100000", "T=R[n]<0; R[n]<<=1;"},
+  {"shar <REG_N>", "0100nnnn00100001", "T=R[n]&1; R[n]>>=1;"},
+  {"shll <REG_N>", "0100nnnn00000000", "T=R[n]<0; R[n]<<=1;"},
+  {"shll16 <REG_N>", "0100nnnn00101000", "R[n]<<=16;"},
+  {"shll2 <REG_N>", "0100nnnn00001000", "R[n]<<=2;"},
+  {"shll8 <REG_N>", "0100nnnn00011000", "R[n]<<=8;"},
+  {"shlr <REG_N>", "0100nnnn00000001", "T=R[n]&1;R[n]=UR[n]>>1;"},
+  {"shlr16 <REG_N>", "0100nnnn00101001", "R[n]=UR[n]>>16;"},
+  {"shlr2 <REG_N>", "0100nnnn00001001", "R[n]=UR[n]>>2;"},
+  {"shlr8 <REG_N>", "0100nnnn00011001", "R[n]=UR[n]>>8;"},
+  {"sleep", "0000000000011011", "abort();"},
+  {"stc GBR,<REG_N>", "0000nnnn00010010", "R[n]=GBR;"},
+  {"stc SR,<REG_N>", "0000nnnn00000010", "R[n]=GET_SR();"},
+  {"stc VBR,<REG_N>", "0000nnnn00100010", "R[n]=VBR;"},
+  {"stc.l GBR,@-<REG_N>", "0100nnnn00010011", "R[n]-=4;WLAT(R[n],GBR);;"},
+  {"stc.l SR,@-<REG_N>", "0100nnnn00000011", "R[n]-=4;WLAT(R[n],GET_SR());"},
+  {"stc.l VBR,@-<REG_N>", "0100nnnn00100011", "R[n]-=4;WLAT(R[n],VBR);"},
+  {"sts MACH,<REG_N>", "0000nnnn00001010", "R[n]=MACH;"},
+  {"sts MACL,<REG_N>", "0000nnnn00011010", "R[n]=MACL;"},
+  {"sts PR,<REG_N>", "0000nnnn00101010", "R[n]=PR;"},
+  {"sts.l MACH,@-<REG_N>", "0100nnnn00000010", "R[n]-=4;WLAT(R[n],MACH);"},
+  {"sts.l MACL,@-<REG_N>", "0100nnnn00010010", "R[n]-=4;WLAT(R[n],MACL);"},
+  {"sts.l PR,@-<REG_N>", "0100nnnn00100010", "R[n]-=4;WLAT(R[n],PR);"},
+  {"sub <REG_M>,<REG_N>", "0011nnnnmmmm1000", "R[n]-=R[m];"},
+  {"subc <REG_M>,<REG_N>", "0011nnnnmmmm1010", "ult = R[n];R[n]-=R[m]+T;T=ult<UR[n];"},
+  {"subv <REG_M>,<REG_N>", "0011nnnnmmmm1011", "abort();"},
+  {"swap.b <REG_M>,<REG_N>", "0110nnnnmmmm1000", "R[n]=((R[m]<<8)&0xff00)|((R[m]>>8)&0x00ff);"},
+  {"swap.w <REG_M>,<REG_N>", "0110nnnnmmmm1001", "R[n]=((R[m]<<16)&0xffff0000)|((R[m]>>16)&0x00ffff);"},
+  {"tas.b @<REG_N>", "0100nnnn00011011", "ult=RBAT(R[n]);T=ult==0;WBAT(R[n],ult|0x80);"},
+  {"trapa #<imm>", "11000011i8*1....", "trap(i,R);"},
+  {"tst #<imm>,R0", "11001000i8*1....", "T=(R0&i)==0;"},
+  {"tst <REG_M>,<REG_N>", "0010nnnnmmmm1000", "T=(R[n]&R[m])==0;"},
+  {"tst.b #<imm>,@(R0,GBR)", "11001100i8*1....", "T=(RBAT(GBR+R0)&i)==0;"},
+  {"xor #<imm>,R0", "11001010i8*1....", "R0^=i;"},
+  {"xor <REG_M>,<REG_N>", "0010nnnnmmmm1010", "R[n]^=R[m];"},
+  {"xor.b #<imm>,@(R0,GBR)", "11001110i8*1....", "ult=RBAT(GBR+R0);ult^=i;WBAT(GBR+R0,ult);"},
+  {"xtrct <REG_M>,<REG_N>", "0010nnnnmmmm1101", "R[n]=((R[n]>>16)&0xffff)|((R[m]<<16)&0xffff0000);"},
+
+#if 0
+{"mul.l <REG_M>,<REG_N>","0000nnnnmmmm0111","/* mull */"},
+{"dmuls.l <REG_M>,<REG_N>","0011nnnnmmmm1101","/* dmuls.l */"},
+{"dmulu.l <REG_M>,<REG_N>","0011nnnnmmmm0101",""},
+{"mac.l @<REG_M>+,@<REG_N>+","0000nnnnmmmm1111",""},
+{"bt/s <bdisp8>","10001101i8p1....",""},
+{"bf/s <bdisp8>","10001111i8p1....",""},
+{"dt <REG_N>","0100nnnn00010000",""},
+{"braf @<REG_N>","0000nnnn00100011",""},
+{"bsrf @<REG_N>","0000nnnn00000011",""},
+{"mulu <REG_M>,<REG_N>","0010nnnnmmmm1110",""},
+{"muls <REG_M>,<REG_N>","0010nnnnmmmm1111",""},     
+#endif
+
+  {0, 0}};
+
+/* Tables of things to put into enums for sh-opc.h */
+static char *nibble_type_list[] =
+{
+  "HEX_0",
+  "HEX_1",
+  "HEX_2",
+  "HEX_3",
+  "HEX_4",
+  "HEX_5",
+  "HEX_6",
+  "HEX_7",
+  "HEX_8",
+  "HEX_9",
+  "HEX_A",
+  "HEX_B",
+  "HEX_C",
+  "HEX_D",
+  "HEX_E",
+  "HEX_F",
+  "REG_N",
+  "REG_M",
+  "BRANCH_12",
+  "BRANCH_8",
+  "DISP_8",
+  "DISP_4",
+  "IMM_4",
+  "IMM_4BY2",
+  "IMM_4BY4",
+  "PCRELIMM_8BY2",
+  "PCRELIMM_8BY4",
+  "IMM_8",
+  "IMM_8BY2",
+  "IMM_8BY4",
+  0
+};
+static
+char *arg_type_list[] =
+{
+  "A_END",
+  "A_BDISP12",
+  "A_BDISP8",
+  "A_DEC_M",
+  "A_DEC_N",
+  "A_DISP_GBR",
+  "A_DISP_PC",
+  "A_DISP_REG_M",
+  "A_DISP_REG_N",
+  "A_GBR",
+  "A_IMM",
+  "A_INC_M",
+  "A_INC_N",
+  "A_IND_M",
+  "A_IND_N",
+  "A_IND_R0_REG_M",
+  "A_IND_R0_REG_N",
+  "A_MACH",
+  "A_MACL",
+  "A_PR",
+  "A_R0",
+  "A_R0_GBR",
+  "A_REG_M",
+  "A_REG_N",
+  "A_SR",
+  "A_VBR",
+  0,
+};
+
+static void
+make_enum_list (name, s)
+     char *name;
+     char **s;
+{
+  int i = 1;
+  printf ("typedef enum {\n");
+  while (*s)
+    {
+      printf ("\t%s,\n", *s, i);
+      s++;
+      i++;
+    }
+  printf ("} %s;\n", name);
+}
+
+static void
+gengastab ()
+{
+  op *p;
+  sorttab ();
+  for (p = tab; p->name; p++)
+    {
+      printf ("%s %-30s\n", p->code, p->name);
+    }
+
+
+}
+
+
+static void 
+genopc ()
+{
+  op *p;
+  make_enum_list ("sh_nibble_type", nibble_type_list);
+  make_enum_list ("sh_arg_type", arg_type_list);
+
+  printf ("typedef struct {\n");
+  printf ("char *name;\n");
+  printf ("sh_arg_type arg[3];\n");
+  printf ("sh_nibble_type nibbles[4];\n");
+  printf ("} sh_opcode_info;\n");
+  printf ("#ifdef DEFINE_TABLE\n");
+  printf ("sh_opcode_info sh_table[]={\n");
+  for (p = tab; p->name; p++)
+    {
+      printf ("\n\/\* %s %-20s*/", p->code, p->name);
+      think (p);
+    }
+  printf ("0};\n");
+  printf ("#endif\n");
+}
+
+
+m (ptr, a, rep)
+     char **ptr;
+     char *a;
+     char *rep;
+{
+  int l = strlen (a);
+  if (strncmp (*ptr, a, l) == 0)
+    {
+      printf ("%s", rep);
+      *ptr += l;
+      if (**ptr)
+	printf (",");
+    }
+}
+
+think (o)
+     op *o;
+{
+  int t;
+  char *n;
+  char *p;
+
+  printf ("{\"");
+  n = o->name;
+  while (*n && *n != ' ')
+    {
+      printf ("%c", *n);
+      n++;
+    }
+  printf ("\",{");
+
+  p = n;
+
+  if (!*p)
+    {
+      printf ("0");
+    }
+  while (*p)
+    {
+      while (*p == ',' || *p == ' ')
+	p++;
+      m (&p, "#<imm>", "A_IMM");
+      m (&p, "R0", "A_R0");
+      m (&p, "<REG_N>", "A_REG_N");
+      m (&p, "@<REG_N>+", "A_INC_N");
+      m (&p, "@<REG_N>", "A_IND_N");
+      m (&p, "@-<REG_N>", "A_DEC_N");
+      m (&p, "<REG_M>", " A_REG_M");
+      m (&p, "@<REG_M>+", "A_INC_M");
+      m (&p, "@<REG_M>", "A_IND_M");
+      m (&p, "@-<REG_M>", "A_DEC_M");
+      m (&p, "@(<disp>,PC)", "A_DISP_PC");
+      m (&p, "@(<disp>,<REG_M>)", "A_DISP_REG_M");
+      m (&p, "@(<disp>,<REG_N>)", "A_DISP_REG_N");
+      m (&p, "@(R0,<REG_N>)", "A_IND_R0_REG_N");
+      m (&p, "@(R0,<REG_M>)", "A_IND_R0_REG_M");
+      m (&p, "@(<disp>,GBR)", "A_DISP_GBR");
+      m (&p, "@(R0,GBR)", "A_R0_GBR");
+      m (&p, "<bdisp8>", "A_BDISP8");
+      m (&p, "<bdisp12>", "A_BDISP12");
+      m (&p, "SR", "A_SR");
+      m (&p, "GBR", "A_GBR");
+      m (&p, "VBR", "A_VBR");
+      m (&p, "MACH", "A_MACH");
+      m (&p, "MACL", "A_MACL");
+      m (&p, "PR", "A_PR");
+
+    }
+  printf ("},{");
+
+  p = o->code;
+  while (*p)
+    {
+      m (&p, "0000", "HEX_0");
+      m (&p, "0001", "HEX_1");
+      m (&p, "0010", "HEX_2");
+      m (&p, "0011", "HEX_3");
+      m (&p, "0100", "HEX_4");
+      m (&p, "0101", "HEX_5");
+      m (&p, "0110", "HEX_6");
+      m (&p, "0111", "HEX_7");
+
+      m (&p, "1000", "HEX_8");
+      m (&p, "1001", "HEX_9");
+      m (&p, "1010", "HEX_A");
+      m (&p, "1011", "HEX_B");
+      m (&p, "1100", "HEX_C");
+      m (&p, "1101", "HEX_D");
+      m (&p, "1110", "HEX_E");
+      m (&p, "1111", "HEX_F");
+      m (&p, "i8*1....", "IMM_8");
+      m (&p, "i4*1", "IMM_4");
+      m (&p, "i8p4....", "PCRELIMM_8BY4");
+      m (&p, "i8p2....", "PCRELIMM_8BY2");
+      m (&p, "i8*2....", "IMM_8BY2");
+      m (&p, "i4*2", "IMM_4BY2");
+      m (&p, "i8*4....", "IMM_8BY4");
+      m (&p, "i4*4", "IMM_4BY4");
+      m (&p, "i12.........", "BRANCH_12");
+      m (&p, "i8p1....", "BRANCH_8");
+      m (&p, "nnnn", "REG_N");
+      m (&p, "mmmm", "REG_M");
+
+    }
+  printf ("}},\n");
+}
+
+qfunc (a, b)
+     op *a;
+     op *b;
+{
+  char bufa[9];
+  char bufb[9];
+  memcpy (bufa, a->code, 4);
+  memcpy (bufa + 4, a->code + 12, 4);
+  bufa[8] = 0;
+
+  memcpy (bufb, b->code, 4);
+  memcpy (bufb + 4, b->code + 12, 4);
+  bufb[8] = 0;
+  return (strcmp (bufa, bufb));
+}
+
+
+sorttab ()
+{
+  op *p = tab;
+
+  int len = 0;
+
+  while (p->name)
+    {
+      p++;
+      len++;
+    }
+
+  qsort (tab, len, sizeof (*p), qfunc);
+
+}
+
+/* Convert a string of 4 binary digits into an int */
+
+static
+int
+bton (s)
+     char *s;
+
+{
+  int n = 0;
+  int v = 8;
+  while (v)
+    {
+      if (*s == '1')
+	n |= v;
+      v >>= 1;
+      s++;
+    }
+  return n;
+}
+
+static char table[1 << 16];
+
+/* Take an opcode expand all varying fields in it out and fill all the 
+  right entries in 'table' with the opcode index*/
+    
+expand_opcode (shift, val, i, s)
+     char *s;
+{
+  int j;
+
+  if (*s == 0)
+    {
+      table[val] = i;
+    }
+  else
+    {
+      switch (s[0])
+	{
+
+	case '0':
+	case '1':
+	  {
+
+	    int n = bton (s);
+	    if (n >= 0)
+	      {
+		expand_opcode (shift - 4, val | (n << shift), i, s + 4);
+	      }
+	    break;
+	  }
+	case 'n':
+	case 'm':
+	  for (j = 0; j < 16; j++)
+	    {
+	      expand_opcode (shift - 4, val | (j << shift), i, s + 4);
+
+	    }
+	  break;
+
+	default:
+	  for (j = 0; j < (1 << (shift + 4)); j++)
+	    {
+	      table[val | j] = i;
+	    }
+	}
+    }
+}
+
+/* Print the jump table used to index an opcode into a switch
+  statement entry */
+static void
+
+dumptable ()
+{
+  int lump = 256;
+  int online = 16;
+
+  int i = 0;
+
+  while (i < 1 << 16)
+    {
+      int j = 0;
+      int nc = 0;
+
+      printf ("unsigned char sh_jump_table%x[%d]={\n", i, lump);
+
+      while (j < lump)
+	{
+	  int k = 0;
+	  while (k < online)
+	    {
+	      printf ("%2d", table[i + j + k]);
+	      if (j + k < lump)
+		printf (",");
+
+	      k++;
+	    }
+	  j += k;
+	  printf ("\n");
+	}
+      i += j;
+      printf ("};\n");
+    }
+
+}
+
+
+static void
+filltable ()
+{
+  op *p;
+  int index = 1;
+
+  sorttab ();
+  for (p = tab; p->name; p++)
+    {
+      p->index = index++;
+      expand_opcode (12, 0, p->index, p->code);
+    }
+}
+
+static void 
+gensim ()
+{
+  op *p;
+  int j;
+
+  printf ("{\n");
+  printf ("switch (jump_table[iword]) {\n");
+
+  for (p = tab; p->name; p++)
+    {
+      int sextbit = -1;
+   
+      char *s = p->code;
+
+      printf ("\/\* %s %s *\/\n", p->name, p->code);
+      printf ("case %d:      \n", p->index);
+
+      printf ("{\n");
+      while (*s)
+	{
+	  switch (*s)
+	    {
+	    case '0':
+	    case '1':
+	    case '.':
+	      s += 4;
+	      break;
+	    case 'n':
+	      printf ("int n =  (iword >>8) & 0xf;\n");
+	      s += 4;
+	      break;
+	    case 'm':
+	      printf ("int m =  (iword >>4) & 0xf;\n");
+	      s += 4;
+
+	      break;
+
+	    case 'i':
+	      printf ("int i = (iword & 0x");
+
+	      switch (s[1])
+		{
+		case '4':
+		  printf ("f");
+		  break;
+		case '8':
+		  printf ("ff");
+		  break;
+		case '1':
+		  sextbit = 12;
+		  
+		  printf ("fff");
+		  break;
+		}
+	      printf (")");
+
+	      switch (s[3])
+		{
+		case '1':
+		  break;
+		case '2':
+		  printf ("<<1");
+		  break;
+		case '4':
+		  printf ("<<2");
+		  break;
+		}
+	      printf (";\n");
+	      s += 4;
+	    }
+	}
+      if (sextbit>0) 
+	{
+	  printf("i = (i ^ (1<<%d))-(1<<%d);\n",sextbit-1,sextbit-1);
+	}
+      
+      for (j = 0; j < 10; j++)
+	{
+	  if (p->stuff[j])
+	    {
+	      printf ("%s\n", p->stuff[j]);
+	    }
+	}
+      printf ("break;\n", p->stuff);
+      printf ("}\n");
+    }
+  printf ("}\n}\n");
+}
+
+
+int
+main (ac, av)
+     char **av;
+
+{
+  if (ac > 1)
+    {
+      if (strcmp (av[1], "-t") == 0)
+	{
+	  gengastab ();
+	}
+      else if (strcmp (av[1], "-s") == 0)
+	{
+	  filltable ();
+	  dumptable ();
+
+	}
+      else if (strcmp (av[1], "-x") == 0)
+	{
+	  filltable ();
+	  gensim ();
+	}
+    }
+  else
+    {
+      genopc ();
+    }
+  return 0;
+}