Thanks Ali. You are always helpful.
Inside buildMultInst(), there is call to templates defined in
src/arch/arm/isa/templates/multi.isa, but I cannot find connection
between src/arch/arm/isa/format/mult.isa and
src/arch/arm/isa/insts/mult.isa.
So what's the link among those files under /format, /templates and
/insts directories?
On 6/25/2013 11:32 PM, Ali Saidi wrote:
That code ends up in src/arch/arm/isa/insts/mult.isa which ultimately
calls buildMultInst() and that function emits two versions of Mul one
that sets the condition codes and one that does not. The prior has Cc
appended to the name.
Ali
On Jun 24, 2013, at 4:13 PM, Jianghao <guojh...@gmail.com
<mailto:guojh...@gmail.com>> wrote:
I have a questions about ARM ISA implementation.
From the document, instruction "format" is basically a Python
function to generate up to four pieces of C++ code.
If it's nested format structure like following code, which one will
be used, DataOp, ArmMultAndMultAcc or both for the multiply instruction?
decode COND_CODE {
0xF: ArmUnconditional::armUnconditional();
default: decode ENCODING {
format DataOp {
0x0: decode SEVEN_AND_FOUR {
1: decode MISC_OPCODE {
0x9: decode PREPOST {
0: ArmMultAndMultAcc::armMultAndMultAcc();
1: ArmSyncMem::armSyncMem();
}
0xb, 0xd, 0xf: AddrMode3::addrMode3();
}
When I take a look of ArmMultAndMultAcc format code, there are return
statements like following
"return new MulCc(machInst, rd, rm, rn);"
What's the meaning of this? I even cannot grep any definition of
MulCc in src directory.
Thanks
_______________________________________________
gem5-users mailing list
gem5-users@gem5.org <mailto:gem5-users@gem5.org>
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
_______________________________________________
gem5-users mailing list
gem5-users@gem5.org
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
_______________________________________________
gem5-users mailing list
gem5-users@gem5.org
http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
