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Regarding machine modes
- From: "Sivaprasad.pv" <sivaprasad dot pv at redpinesignals dot com>
- To: gcc <gcc-help at gcc dot gnu dot org>
- Date: Thu, 02 Oct 2008 11:04:11 +0530
- Subject: Regarding machine modes
Hi all,
I have little confusion about machine modes.
Initially our architecture supports both 16 & 32 bit registers.
At that time we have used
QImode - char
HImode - intergers (16 bit)
SImode - long interger(32 bit)
Now we are proposed to change all registers to 32 bit registers.We have
corresponding load/store 8/16/32bit instructions available with
sign/zero extension.
Now any data item is represented as 32 bit value in registers.
Can I define a pattern with QImode / HImode/SImode (in .md file) or I
should use only SImode.
Thanks,
Siva Prasad