Added the ability to disable the prefix byte.

Any instructions that either have a register size of
8 bits, use implied addressing, or branch can save a
byte by disabling the prefix byte.

It does this by checking if the first three bits are
all set to 1.
If true, then it will treat it as a prefix
byte, otherwise, it will treat it as an opcode.

1 files changed, 1 insertions, 0 deletions

diff --git a/opcode.h b/opcode.h
index d83b74c..5203fa9 100644
--- a/opcode.h
+++ b/opcode.h
@@ -97,6 +97,7 @@ struct sux;
 
 uint8_t *addr; /* Address Space. */
 uint64_t clk; /* Clock cycles. */
+uint8_t ibcount; /* Number of bytes taken up by instruction. */
 
 struct sux {
 	uint64_t ps; /* The processor status register. */