Re: [PATCH,ARM][4/n] Add negdi_extend patterns

2013-03-26 Thread Ramana Radhakrishnan
On Mon, Feb 18, 2013 at 6:40 PM, Greta Yorsh wrote: > This patch adds patterns to handle negation of an extended 32-bit value more > efficiently. > > For example, > > (set (reg:DI r0) (neg:DI (sign_extend:DI (reg:SI r0))) > > The compiler currently generates > mov r1, r0, asr #31 >

[PATCH,ARM][4/n] Add negdi_extend patterns

2013-02-18 Thread Greta Yorsh
This patch adds patterns to handle negation of an extended 32-bit value more efficiently. For example, (set (reg:DI r0) (neg:DI (sign_extend:DI (reg:SI r0))) The compiler currently generates mov r1, r0, asr #31 rsbsr0, r0, #0 rsc r1, r1, #0 and after the patch