Improve MIPS32 support

diff --git a/gas/ChangeLog b/gas/ChangeLog
index caed5bc..9c8a3df 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -4,6 +4,15 @@
         don't accept as constant the difference between the
         addresses of symbols in two different sections.
 
+        * config/tc-mips.c (macro_build): Add new 'U' and 'J' operand
+        specifiers.
+        (validate_mips_insn): Likewise.  Also, update 'B' operand
+        specifier to use OP_*_CODE20 constants and delete 'm' operand
+        specifier.
+        (mips_ip): Remove 'm' operand specifier, add 'U' and 'J'
+        operand specifiers.  Change warning generated by 'B' operand
+        specifier to reflect its new multi-purpose usage.
+
 2000-12-01      Joel Sherrill <joel@OARcorp.com>
 
        * configure.in (arm-*-rtems*, a29k-*rtems*, h8300-*-rtems*):

diff --git a/gas/config/tc-mips.c b/gas/config/tc-mips.c
index ef6304d..568d261 100644 (file)
--- a/gas/config/tc-mips.c
+++ b/gas/config/tc-mips.c
@@ -2597,6 +2597,15 @@ macro_build (place, counter, ep, name, fmt, va_alist)
          insn.insn_opcode |= va_arg (args, int) << 11;
          continue;
 
+       case 'U':
+         {
+           int tmp = va_arg (args, int);
+
+           insn.insn_opcode |= tmp << 16;
+           insn.insn_opcode |= tmp << 11;
+           continue; 
+         }
+
        case 'V':
        case 'S':
          insn.insn_opcode |= va_arg (args, int) << 11;
@@ -2617,6 +2626,10 @@ macro_build (place, counter, ep, name, fmt, va_alist)
          insn.insn_opcode |= va_arg (args, int) << 6;
          continue;
 
+       case 'J':
+         insn.insn_opcode |= va_arg (args, int) << 6;
+         continue;
+
        case 'q':
          insn.insn_opcode |= va_arg (args, int) << 6;
          continue;
@@ -6976,7 +6989,7 @@ validate_mips_insn (opc)
       case '<': USE_BITS (OP_MASK_SHAMT,       OP_SH_SHAMT);   break;
       case '>':        USE_BITS (OP_MASK_SHAMT,        OP_SH_SHAMT);   break;
       case 'A': break;
-      case 'B':        USE_BITS (OP_MASK_SYSCALL,      OP_SH_SYSCALL); break;
+      case 'B': USE_BITS (OP_MASK_CODE20,       OP_SH_CODE20);  break;
       case 'C':        USE_BITS (OP_MASK_COPZ,         OP_SH_COPZ);    break;
       case 'D':        USE_BITS (OP_MASK_FD,           OP_SH_FD);      break;
       case 'E':        USE_BITS (OP_MASK_RT,           OP_SH_RT);      break;
@@ -6984,6 +6997,7 @@ validate_mips_insn (opc)
       case 'G':        USE_BITS (OP_MASK_RD,           OP_SH_RD);      break;
       case 'H': USE_BITS (OP_MASK_SEL,         OP_SH_SEL);     break;
       case 'I': break;
+      case 'J':       USE_BITS (OP_MASK_CODE19,       OP_SH_CODE19);  break;
       case 'L': break;
       case 'M':        USE_BITS (OP_MASK_CCC,          OP_SH_CCC);     break;
       case 'N':        USE_BITS (OP_MASK_BCC,          OP_SH_BCC);     break;
@@ -7002,7 +7016,6 @@ validate_mips_insn (opc)
       case 'j':        USE_BITS (OP_MASK_DELTA,        OP_SH_DELTA);   break;
       case 'k':        USE_BITS (OP_MASK_CACHE,        OP_SH_CACHE);   break;
       case 'l': break;
-      case 'm': USE_BITS (OP_MASK_CODE20,      OP_SH_CODE20);  break;
       case 'o': USE_BITS (OP_MASK_DELTA,       OP_SH_DELTA);   break;
       case 'p':        USE_BITS (OP_MASK_DELTA,        OP_SH_DELTA);   break;
       case 'q':        USE_BITS (OP_MASK_CODE2,        OP_SH_CODE2);   break;
@@ -7015,6 +7028,8 @@ validate_mips_insn (opc)
       case 'x': break;
       case 'z': break;
       case 'P': USE_BITS (OP_MASK_PERFREG,     OP_SH_PERFREG); break;
+      case 'U': USE_BITS (OP_MASK_RD,           OP_SH_RD);
+               USE_BITS (OP_MASK_RT,           OP_SH_RT);      break;
       default:
        as_bad (_("internal: bad mips opcode (unknown operand type `%c'): %s %s"),
                c, opc->name, opc->args);
@@ -7268,29 +7283,11 @@ mips_ip (str, ip)
              s = expr_end;
              continue;
 
-           case 'm':           /* Full 20 bit break code.  */
+           case 'B':           /* 20-bit syscall/break code.  */
              my_getExpression (&imm_expr, s);
-
              check_absolute_expr (ip, &imm_expr);
-
              if ((unsigned) imm_expr.X_add_number > 0xfffff)
-               {
-                 as_warn (_("Illegal break code (%ld)"),
-                          (long) imm_expr.X_add_number);
-                 imm_expr.X_add_number &= 0xfffff;
-               }
-
-             ip->insn_opcode |= imm_expr.X_add_number << 6;
-             imm_expr.X_op = O_absent;
-             s = expr_end;
-
-             continue;
-
-           case 'B':           /* syscall code */
-             my_getExpression (&imm_expr, s);
-             check_absolute_expr (ip, &imm_expr);
-             if ((unsigned) imm_expr.X_add_number > 0xfffff)
-               as_warn (_("Illegal syscall code (%ld)"),
+               as_warn (_("Illegal 20-bit code (%ld)"),
                         (long) imm_expr.X_add_number);
              ip->insn_opcode |= imm_expr.X_add_number << 6;
              imm_expr.X_op = O_absent;
@@ -7311,6 +7308,17 @@ mips_ip (str, ip)
               s = expr_end;
               continue;
 
+           case 'J':           /* 19-bit wait code.  */
+             my_getExpression (&imm_expr, s);
+             check_absolute_expr (ip, &imm_expr);
+             if ((unsigned) imm_expr.X_add_number > 0x7ffff)
+               as_warn (_("Illegal 19-bit code (%ld)"),
+                        (long) imm_expr.X_add_number);
+             ip->insn_opcode |= imm_expr.X_add_number << 6;
+             imm_expr.X_op = O_absent;
+             s = expr_end;
+             continue;
+
            case 'P':           /* Performance register */
               my_getExpression (&imm_expr, s);
              check_absolute_expr (ip, &imm_expr);
@@ -7336,6 +7344,7 @@ mips_ip (str, ip)
            case 'G':           /* coprocessor destination register */
            case 'x':           /* ignore register name */
            case 'z':           /* must be zero register */
+           case 'U':           /* destination register (clo/clz).  */
              s_reset = s;
              if (s[0] == '$')
                {
@@ -7450,6 +7459,10 @@ mips_ip (str, ip)
                    case 'G':
                      ip->insn_opcode |= regno << 11;
                      break;
+                   case 'U':
+                     ip->insn_opcode |= regno << 11;
+                     ip->insn_opcode |= regno << 16;
+                     break;
                    case 'w':
                    case 't':
                    case 'E':

diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 32e2baf..902544a 100644 (file)
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,13 @@
+2000-12-01  Chris Demetriou  <cgd@sibyte.com>
+
+        mips.h (OP_MASK_SYSCALL, OP_SH_SYSCALL): Delete.
+        (OP_MASK_CODE20, OP_SH_CODE20): Define, with values of old
+        OP_*_SYSCALL definitions.
+        (OP_SH_CODE19, OP_MASK_CODE19): Define, for use as
+        19 bit wait codes.
+        (MIPS operand specifier comments): Remove 'm', add 'U' and
+        'J', and update the meaning of 'B' so that it's more general.
+
 2000-10-20  Jakub Jelinek  <jakub@redhat.com>
 
        * sparc.h (enum sparc_opcode_arch_val): Add SPARC_OPCODE_ARCH_V9B.

diff --git a/include/opcode/mips.h b/include/opcode/mips.h
index 95415e0..61931f6 100644 (file)
--- a/include/opcode/mips.h
+++ b/include/opcode/mips.h
@@ -48,9 +48,11 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  *
    breakpoint instruction are not defined; Kane says the breakpoint
    code field in BREAK is 20 bits; yet MIPS assemblers and debuggers
    only use ten bits).  An optional two-operand form of break/sdbbp
-   allows the lower ten bits to be set too.
+   allows the lower ten bits to be set too, and MIPS32 and later
+   architectures allow 20 bits to be set with a signal operand
+   (using CODE20).
 
-   The syscall instruction uses SYSCALL.
+   The syscall instruction uses CODE20.
 
    The general coprocessor instructions use COPZ.  */
 
@@ -82,8 +84,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  *
 #define OP_SH_PREFX            11
 #define OP_MASK_CCC            0x7
 #define OP_SH_CCC              8
-#define OP_MASK_SYSCALL                0xfffff
-#define OP_SH_SYSCALL          6
+#define OP_MASK_CODE20         0xfffff /* 20 bit syscall/breakpoint code.  */
+#define OP_SH_CODE20           6
 #define OP_MASK_SHAMT          0x1f
 #define OP_SH_SHAMT            6
 #define OP_MASK_FD             0x1f
@@ -100,17 +102,17 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  *
 #define OP_SH_FUNCT            0
 #define OP_MASK_SPEC           0x3f
 #define OP_SH_SPEC             0
-#define OP_SH_LOCC              8       /* FP condition code */
-#define OP_SH_HICC              18      /* FP condition code */
+#define OP_SH_LOCC              8       /* FP condition code.  */
+#define OP_SH_HICC              18      /* FP condition code.  */
 #define OP_MASK_CC              0x7
-#define OP_SH_COP1NORM          25      /* Normal COP1 encoding */
-#define OP_MASK_COP1NORM        0x1     /* a single bit */
-#define OP_SH_COP1SPEC          21      /* COP1 encodings */
+#define OP_SH_COP1NORM          25      /* Normal COP1 encoding.  */
+#define OP_MASK_COP1NORM        0x1     /* a single bit.  */
+#define OP_SH_COP1SPEC          21      /* COP1 encodings.  */
 #define OP_MASK_COP1SPEC        0xf
 #define OP_MASK_COP1SCLR        0x4
 #define OP_MASK_COP1CMP         0x3
 #define OP_SH_COP1CMP           4
-#define OP_SH_FORMAT            21      /* FP short format field */
+#define OP_SH_FORMAT            21      /* FP short format field.  */
 #define OP_MASK_FORMAT          0x7
 #define OP_SH_TRUE              16
 #define OP_MASK_TRUE            0x1
@@ -120,16 +122,17 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  *
 #define OP_MASK_UNSIGNED        0x1
 #define OP_SH_HINT              16
 #define OP_MASK_HINT            0x1f
-#define OP_SH_MMI               0       /* Multimedia (parallel) op */
+#define OP_SH_MMI               0       /* Multimedia (parallel) op.  */
 #define OP_MASK_MMI             0x3f 
 #define OP_SH_MMISUB            6
 #define OP_MASK_MMISUB          0x1f
-#define OP_MASK_PERFREG                0x1f    /* Performance monitoring */
+#define OP_MASK_PERFREG                0x1f    /* Performance monitoring.  */
 #define OP_SH_PERFREG          1
-#define OP_SH_SEL              0       /* Coprocessor select field */
-#define OP_MASK_SEL            0x7     /* The sel field of mfcZ and mtcZ. */
-#define OP_SH_CODE20           6       /* 20 bit breakpoint code */
-#define OP_MASK_CODE20         0xfffff
+#define OP_SH_SEL              0       /* Coprocessor select field.  */
+#define OP_MASK_SEL            0x7     /* The sel field of mfcZ and mtcZ.  */
+#define OP_SH_CODE19           6       /* 19 bit wait code.  */
+#define OP_MASK_CODE19         0x7ffff
+
 
 /* This structure holds information for a particular instruction.  */
 
@@ -176,7 +179,6 @@ struct mips_opcode
    "i" 16 bit unsigned immediate (OP_*_IMMEDIATE)
    "j" 16 bit signed immediate (OP_*_DELTA)
    "k" 5 bit cache opcode in target register position (OP_*_CACHE)
-   "m" 20 bit breakpoint code (OP_*_CODE20)
    "o" 16 bit signed offset (OP_*_DELTA)
    "p" 16 bit PC relative branch target address (OP_*_DELTA)
    "q" 10 bit extra breakpoint code (OP_*_CODE2)
@@ -186,8 +188,11 @@ struct mips_opcode
    "u" 16 bit upper 16 bits of address (OP_*_IMMEDIATE)
    "v" 5 bit same register used as both source and destination (OP_*_RS)
    "w" 5 bit same register used as both target and destination (OP_*_RT)
+   "U" 5 bit same destination register in both OP_*_RD and OP_*_RT
+       (used by clo and clz)
    "C" 25 bit coprocessor function code (OP_*_COPZ)
-   "B" 20 bit syscall function code (OP_*_SYSCALL)
+   "B" 20 bit syscall/breakpoint function code (OP_*_CODE20)
+   "J" 19 bit wait function code (OP_*_CODE19)
    "x" accept and ignore register name
    "z" must be zero register
 
@@ -221,8 +226,8 @@ struct mips_opcode
 
    Characters used so far, for quick reference when adding more:
    "<>(),"
-   "ABCDEFGHILMNPSTRVW"
-   "abcdfhijklmopqrstuvwxz"
+   "ABCDEFGHIJLMNPRSTUVW"
+   "abcdfhijklopqrstuvwxz"
 */
 
 /* These are the bits which may be set in the pinfo field of an

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index ba54c74..debb7fb 100644 (file)
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,17 @@
+2000-12-01  Chris Demetriou <cgd@sibyte.com>
+
+        mips-dis.c (print_insn_arg): Handle new 'U' and 'J' argument
+        specifiers.  Update 'B' for new constant names, and remove
+        'm'.
+        mips-opc.c (mips_builtin_opcodes): Place "pref" and "ssnop"
+        near the top of the array, so they are disassembled properly.
+        Enable "ssnop" for MIPS32.  Add "break" variant with 20 bit
+        code for MIPS32.  Update "clo" and "clz" to use 'U' operand
+        specifier.  Add 'H' format specifier variants for "mfc1,"
+        "mfc2," "mfc3," "mtc1," "mtc2," and "mtc3" for MIPS32.  Update
+        MIPS32 "sdbbp" to use 'B' operand specifier.  Add MIPS32
+        "wait" variant which uses 'J' operand specifier.
+        
 2000-11-28  Hans-Peter Nilsson  <hp@bitrange.com>
 
        * sh-dis.c (print_insn_ddt): Make insn_x, insn_y unsigned.

diff --git a/opcodes/mips-dis.c b/opcodes/mips-dis.c
index 4c76cde..39bcf33 100644 (file)
--- a/opcodes/mips-dis.c
+++ b/opcodes/mips-dis.c
@@ -157,6 +157,30 @@ print_insn_arg (d, l, pc, info)
                             reg_names[(l >> OP_SH_RD) & OP_MASK_RD]);
       break;
 
+    case 'U':
+      {
+      /* First check for both rd and rt being equal. */
+      int reg = (l >> OP_SH_RD) & OP_MASK_RD;
+      if (reg == ((l >> OP_SH_RT) & OP_MASK_RT))
+        (*info->fprintf_func) (info->stream, "$%s",
+                               reg_names[reg]);
+      else                        
+        {
+          /* If one is zero use the other. */
+          if (reg == 0)
+            (*info->fprintf_func) (info->stream, "$%s",
+                                   reg_names[(l >> OP_SH_RT) & OP_MASK_RT]);
+          else if (((l >> OP_SH_RT) & OP_MASK_RT) == 0)
+            (*info->fprintf_func) (info->stream, "$%s",
+                                   reg_names[reg]);
+          else /* Bogus, result depends on processor. */
+            (*info->fprintf_func) (info->stream, "$%s or $%s",
+                                   reg_names[reg],
+                                   reg_names[(l >> OP_SH_RT) & OP_MASK_RT]);
+          }
+      }
+      break;
+
     case 'z':
       (*info->fprintf_func) (info->stream, "$%s", reg_names[0]);
       break;
@@ -171,17 +195,11 @@ print_insn_arg (d, l, pc, info)
                             (l >> OP_SH_CODE) & OP_MASK_CODE);
       break;
 
-
     case 'q':
       (*info->fprintf_func) (info->stream, "0x%x",
                             (l >> OP_SH_CODE2) & OP_MASK_CODE2);
       break;
 
-    case 'm':
-      (*info->fprintf_func) (info->stream, "0x%x",
-                            (l >> OP_SH_CODE20) & OP_MASK_CODE20);
-      break;
-
     case 'C':
       (*info->fprintf_func) (info->stream, "0x%x",
                             (l >> OP_SH_COPZ) & OP_MASK_COPZ);
@@ -189,7 +207,12 @@ print_insn_arg (d, l, pc, info)
 
     case 'B':
       (*info->fprintf_func) (info->stream, "0x%x",
-                            (l >> OP_SH_SYSCALL) & OP_MASK_SYSCALL);
+                            (l >> OP_SH_CODE20) & OP_MASK_CODE20);
+      break;
+
+    case 'J':
+      (*info->fprintf_func) (info->stream, "0x%x",
+                            (l >> OP_SH_CODE19) & OP_MASK_CODE19);
       break;
 
     case 'S':
@@ -198,7 +221,6 @@ print_insn_arg (d, l, pc, info)
                             (l >> OP_SH_FS) & OP_MASK_FS);
       break;
 
-
     case 'T':
     case 'W':
       (*info->fprintf_func) (info->stream, "$f%d",

diff --git a/opcodes/mips-opc.c b/opcodes/mips-opc.c
index 1c2a249..3e19ffa 100644 (file)
--- a/opcodes/mips-opc.c
+++ b/opcodes/mips-opc.c
@@ -107,12 +107,15 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  *
    Many instructions are short hand for other instructions (i.e., The
    jal <register> instruction is short for jalr <register>).  */
 
-const struct mips_opcode mips_builtin_opcodes[] = {
+const struct mips_opcode mips_builtin_opcodes[] =
+{
 /* These instructions appear first so that the disassembler will find
    them first.  The assemblers uses a hash table based on the
    instruction name anyhow.  */
 /* name,    args,      match,      mask,       pinfo,          membership */
-{"nop",     "",                0x00000000, 0xffffffff, 0,              I1      },
+{"pref",    "k,o(b)",   0xcc000000, 0xfc000000, RD_b,           G3|M1|P4},
+{"nop",     "",         0x00000000, 0xffffffff, 0,              I1      },
+{"ssnop",   "",         0x00000040, 0xffffffff, 0,              M1|P4   },
 {"li",      "t,j",      0x24000000, 0xffe00000, WR_t,          I1      }, /* addiu */
 {"li",     "t,i",      0x34000000, 0xffe00000, WR_t,           I1      }, /* ori */
 {"li",      "t,I",     0,    (int) M_LI,       INSN_MACRO,     I1      },
@@ -220,6 +223,7 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"bnel",    "s,t,p",   0x54000000, 0xfc000000, CBL|RD_s|RD_t,  I2|T3   },
 {"bnel",    "s,I,p",   0,    (int) M_BNEL_I,   INSN_MACRO,     I2      },
 {"break",   "",                0x0000000d, 0xffffffff, TRAP,           I1      },
+{"break",   "B",        0x0000000d, 0xfc00003f, TRAP,           P4      },
 {"break",   "c",       0x0000000d, 0xfc00ffff, TRAP,           I1      },
 {"break",   "c,q",     0x0000000d, 0xfc00003f, TRAP,           I1      },
 {"c.f.d",   "S,T",     0x46200030, 0xffe007ff, RD_S|RD_T|WR_CC|FP_D,   I1      },
@@ -328,8 +332,8 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"cfc1",    "t,S",     0x44400000, 0xffe007ff, LCD|WR_t|RD_C1|FP_S,    I1      },
 {"cfc2",    "t,G",     0x48400000, 0xffe007ff, LCD|WR_t|RD_C2, I1      },
 {"cfc3",    "t,G",     0x4c400000, 0xffe007ff, LCD|WR_t|RD_C3, I1      },
-{"clo",     "d,s",     0x70000021, 0xfc1f07ff, WR_d|RD_s,      P4      },
-{"clz",     "d,s",     0x70000020, 0xfc1f07ff, WR_d|RD_s,      P4      },
+{"clo",     "U,s",      0x70000021, 0xfc0007ff, WR_d|RD_s,      P4      },
+{"clz",     "U,s",      0x70000020, 0xfc0007ff, WR_d|RD_s,      P4      },
 {"ctc0",    "t,G",     0x40c00000, 0xffe007ff, COD|RD_t|WR_CC, I1      },
 {"ctc1",    "t,G",     0x44c00000, 0xffe007ff, COD|RD_t|WR_CC|FP_S,    I1      },
 {"ctc1",    "t,S",     0x44c00000, 0xffe007ff, COD|RD_t|WR_CC|FP_S,    I1      },
@@ -545,8 +549,11 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"mfc0",    "t,G,H",   0x40000000, 0xffe007f8, LCD|WR_t|RD_C0, P4      },
 {"mfc1",    "t,S",     0x44000000, 0xffe007ff, LCD|WR_t|RD_S|FP_S,     I1},
 {"mfc1",    "t,G",     0x44000000, 0xffe007ff, LCD|WR_t|RD_S|FP_S,     I1},
+{"mfc1",    "t,G,H",    0x44000000, 0xffe007f8, LCD|WR_t|RD_S|FP_S,     P4},
 {"mfc2",    "t,G",     0x48000000, 0xffe007ff, LCD|WR_t|RD_C2, I1      },
+{"mfc2",    "t,G,H",    0x48000000, 0xffe007f8, LCD|WR_t|RD_C2, P4      },
 {"mfc3",    "t,G",     0x4c000000, 0xffe007ff, LCD|WR_t|RD_C3, I1      },
+{"mfc3",    "t,G,H",    0x4c000000, 0xffe007f8, LCD|WR_t|RD_C3, P4      },
 {"mfhi",    "d",       0x00000010, 0xffff07ff, WR_d|RD_HI,     I1      },
 {"mflo",    "d",       0x00000012, 0xffff07ff, WR_d|RD_LO,     I1      },
 {"mov.d",   "D,S",     0x46200006, 0xffff003f, WR_D|RD_S|FP_D, I1      },
@@ -580,8 +587,11 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"mtc0",    "t,G,H",   0x40800000, 0xffe007f8, COD|RD_t|WR_C0|WR_CC,   P4      },
 {"mtc1",    "t,S",     0x44800000, 0xffe007ff, COD|RD_t|WR_S|FP_S,     I1      },
 {"mtc1",    "t,G",     0x44800000, 0xffe007ff, COD|RD_t|WR_S|FP_S,     I1      },
+{"mtc1",    "t,G,H",    0x44800000, 0xffe007f8, COD|RD_t|WR_S|FP_S,     P4      },
 {"mtc2",    "t,G",     0x48800000, 0xffe007ff, COD|RD_t|WR_C2|WR_CC,   I1      },
+{"mtc2",    "t,G,H",    0x48800000, 0xffe007f8, COD|RD_t|WR_C2|WR_CC,   P4      },
 {"mtc3",    "t,G",     0x4c800000, 0xffe007ff, COD|RD_t|WR_C3|WR_CC,   I1      },
+{"mtc3",    "t,G,H",    0x4c800000, 0xffe007f8, COD|RD_t|WR_C3|WR_CC,   P4      },
 {"mthi",    "s",       0x00000011, 0xfc1fffff, RD_s|WR_HI,     I1      },
 {"mtlo",    "s",       0x00000013, 0xfc1fffff, RD_s|WR_LO,     I1      },
 {"mul.d",   "D,V,T",   0x46200002, 0xffe0003f, WR_D|RD_S|RD_T|FP_D,    I1      },
@@ -620,7 +630,7 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"pll.ps",  "D,V,T",   0x46c0002c, 0xffe0003f, WR_D|RD_S|RD_T|FP_D,    I5},
 {"plu.ps",  "D,V,T",   0x46c0002d, 0xffe0003f, WR_D|RD_S|RD_T|FP_D,    I5},
 
-{"pref",    "k,o(b)",  0xcc000000, 0xfc000000, RD_b,           G3|M1|P4        },
+/* pref is at the start of the table.  */
 {"prefx",   "h,t(b)",  0x4c00000f, 0xfc0007ff, RD_b|RD_t,      I4      },
 
 {"pul.ps",  "D,V,T",   0x46c0002e, 0xffe0003f, WR_D|RD_S|RD_T|FP_D,    I5},
@@ -657,7 +667,7 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"sdbbp",   "",                0x0000000e, 0xffffffff, TRAP,           G2|M1   },
 {"sdbbp",   "c",       0x0000000e, 0xfc00ffff, TRAP,           G2|M1   },
 {"sdbbp",   "c,q",     0x0000000e, 0xfc00003f, TRAP,           G2|M1   },
-{"sdbbp",   "m",       0x7000003f, 0xfc00003f, TRAP,           P4      },
+{"sdbbp",   "B",        0x7000003f, 0xfc00003f, TRAP,           P4      },
 {"sdc1",    "T,o(b)",  0xf4000000, 0xfc000000, SM|RD_T|RD_b|FP_D,      I2      },
 {"sdc1",    "E,o(b)",  0xf4000000, 0xfc000000, SM|RD_T|RD_b|FP_D,      I2      },
 {"sdc1",    "T,A(b)",  0,    (int) M_SDC1_AB,  INSN_MACRO,     I2      },
@@ -711,7 +721,7 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"srlv",    "d,t,s",   0x00000006, 0xfc0007ff, WR_d|RD_t|RD_s, I1      },
 {"srl",     "d,w,s",   0x00000006, 0xfc0007ff, WR_d|RD_t|RD_s, I1      }, /* srlv */
 {"srl",     "d,w,<",   0x00000002, 0xffe0003f, WR_d|RD_t,      I1      },
-{"ssnop",     "",      0x00000040, 0xffffffff, 0,              M1      },
+/* ssnop is at the start of the table.  */
 {"standby", "",         0x42000021, 0xffffffff,        0,              V1      },
 {"sub",     "d,v,t",   0x00000022, 0xfc0007ff, WR_d|RD_s|RD_t, I1      },
 {"sub",     "d,v,I",   0,    (int) M_SUB_I,    INSN_MACRO,     I1      },
@@ -810,6 +820,7 @@ const struct mips_opcode mips_builtin_opcodes[] = {
 {"xor",     "t,r,I",   0,    (int) M_XOR_I,    INSN_MACRO,     I1      },
 {"xori",    "t,r,i",   0x38000000, 0xfc000000, WR_t|RD_s,      I1      },
 {"wait",    "",                0x42000020, 0xffffffff, TRAP,   I3|M1|P4        },
+{"wait",    "J",        0x42000020, 0xfe00003f, TRAP,   P4      },
 {"waiti",   "",                0x42000020, 0xffffffff, TRAP,   L1      },
 {"wb",             "o(b)",     0xbc040000, 0xfc1f0000, SM|RD_b,        L1      },
 /* No hazard protection on coprocessor instructions--they shouldn't