diff options
Diffstat (limited to 'gdb/ns32k-opcode.h')
| -rw-r--r-- | gdb/ns32k-opcode.h | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/gdb/ns32k-opcode.h b/gdb/ns32k-opcode.h index f72d013..3679ef1 100644 --- 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" }, |