On 03/08/12 19:10, Richard Henderson wrote:
> On 2012-08-02 09:24, Richard Earnshaw wrote:
>> +/* Extz only supports SImode, but we can coerce the operands
>> + into that mode. */
>> +emit_constant_insn (cond,
>> +gen_extzv_t2 (gen_lowpart (mod
On 2012-08-02 09:24, Richard Earnshaw wrote:
> + /* Extz only supports SImode, but we can coerce the operands
> +into that mode. */
> + emit_constant_insn (cond,
> + gen_extzv_t2 (gen_lowpart (mode, target),
> +
This patch adds the ability to spot and exploit the UBFX instruction
(bit-field extract) to perform AND operations with an immediate which is
2^N - 1. On some benchmarks this can lead to a significant win over the
existing behaviour on Cortex-A15.
Tested on arm-eabi with some additional testing o
