gdb-3.3

[deliverable/binutils-gdb.git] / gdb / ns32k-opcode.h

diff --git a/gdb/ns32k-opcode.h b/gdb/ns32k-opcode.h
index f72d013c23ab207408a7355a6efcb6856d542898..3679ef1a3ff201ef8e9c3edc86545805279142ee 100644 (file)
--- a/gdb/ns32k-opcode.h
+++ b/gdb/ns32k-opcode.h
@@ -19,6 +19,25 @@ struct not                   /* ns32k opcode text */
   struct not_wot    detail;    /* rest of opcode table          [datum] */
 };
 
+/* Instructions look like this:
+    
+   basic instruction--1, 2, or 3 bytes
+   index byte for operand A, if operand A is indexed--1 byte
+   index byte for operand B, if operand B is indexed--1 byte
+   addressing extension for operand A
+   addressing extension for operand B
+   implied operands
+
+   Operand A is the operand listed first in the following opcode table.
+   Operand B is the operand listed second in the following opcode table.
+   All instructions have at most 2 general operands, so this is enough.
+   The implied operands are associated with operands other than A and B.
+
+   Each operand has a digit and a letter.
+   
+   The digit gives the position in the assembly language.  The letter,
+   one of the following, tells us what kind of operand it is.  */
+
 /* F : 32 bit float
  * L : 64 bit float
  * B : byte
@@ -229,7 +248,7 @@ notstrs[] =
   { "notd",    14,24,  0x274e, "1D2D" },
   { "orb",      6,16,  0x18,   "1B1B" },
   { "orw",      6,16,  0x19,   "1W1W" },
-  { "ord",      6,16,  0x1b,   "1D1D" },
+  { "ord",      6,16,  0x1b,   "1D2D" },
   { "quob",    14,24,  0x30ce, "1B2B" },
   { "quow",    14,24,  0x31ce, "1W2W" },
   { "quod",    14,24,  0x33ce, "1D2D" },