RE: question of Md

["Chan, Sun C" <sun.c.chan@xxxxxxxxx>]

I really don't have a good answer to your question. My guess would be that TOP's like

add_1, mix1_1,... (Instruction_Group: O_40) does not get generated by the compiler

and TOP_add, TOP_andcm,... do. So they are grouped slightly different.

Its not immediately clear the comment:

/* ==== (<%pr%p6>) <r7>=<%o1%r7>,<%o2%r7> ==== */

what exactly %o1 and %o2 means.

Perhaps Mike or Ken can help you.

 

Sun

-----Original Message-----
From: llx [mailto:llx@xxxxxxxxx]
Sent: Wednesday, December 20, 2000 11:51 PM
To: sun Chan
Subject: question of Md

Hi,sun:

   I have some question about the part of Machine description:

        1)Why the operands between operate code "add" and "add_1" are different. In the files (targ_isa_operands.c,h) of PRO64,"add"             belongs to Operands type :O63,but the opcode "add_1" belongs to O40. Two operands types have different operands use. I also want         to know the usage of operand use