Re: [Qemu-devel] [PATCH 1/3] tcg: add ext{8,16,32}u_i{32,64} TCG ops

2009-11-10 Thread Aurelien Jarno
On Tue, Nov 10, 2009 at 02:51:21PM +, Paul Brook wrote: > On Wednesday 30 September 2009, Aurelien Jarno wrote: > > Currently zero extensions ops are implemented by a and op with a > > constant. This is then catched in some backend, and replaced by > > a zero extension instruction. While this w

Re: [Qemu-devel] [PATCH 1/3] tcg: add ext{8,16,32}u_i{32,64} TCG ops

2009-11-10 Thread Paul Brook
On Wednesday 30 September 2009, Aurelien Jarno wrote: > Currently zero extensions ops are implemented by a and op with a > constant. This is then catched in some backend, and replaced by > a zero extension instruction. While this works well on RISC > machines, this adds a useless register move on n