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gas feature: support for larger bit immediates in bt
- From: Andi Kleen <ak at suse dot de>
- To: hjl at lucon dot org
- Cc: binutils at sources dot redhat dot com
- Date: Wed, 19 Sep 2007 14:12:39 +0200
- Subject: gas feature: support for larger bit immediates in bt
One feature that gas is currently missing and what would be sometimes nice
to have is to support offsets >31 in the bt etc. family of instructions
by folding the value/32 into an byte memory offset.
e.g. bt $64,(%rax) can be converted to bt $0,8(%rax)
The IA32 instruction reference manual even mentions that some assemblers
support this.
-Andi