On 01/25/13 18:23, Greta Yorsh wrote:
Add bypasses to forward the result of one MAC operation to the accumulator of another MAC operation.Towards this end, we add a new function arm_mac_accumulator_is_result to be used as a guard for bypasses. Existing guard arm_mac_accumulator_is_mul_result requires a multiply operation as the producer and a multiply-accumulate operation as the consumer. The new guard allows more general producers and consumers. It allows the consumer to be a multiply-accumulate or multiply-subtract operation. It allows the producer to be any SET operation, although only MAC operations are used as producers in the pipeline description of Cortex-A7. gcc/ 2013-01-03 Greta Yorsh <greta.yo...@arm.com> * config/arm/arm-protos.h (arm_mac_accumulator_is_result): New declaration. * config/arm/arm.c (arm_mac_accumulator_is_result): New function. * config/arm/cortex-a7.md: New bypasses using arm_mac_accumulator_is_result.
Ok as it only affects Cortex-A7. Ramana
