On 29/03/13 09:59, Terry Guo wrote:
Hello,
The attached pipeline patch intends to turn following code generation
ldr r5, [r4, #12]
adds r2, r2, #16
str r5, [r3, #8]
to
ldr r5, [r4, #12]
str r5, [r3, #8]
adds r2, r2, #16
The reason is that the STR can be started from the second cycle of its
p
6:00 PM
> To: gcc-patches@gcc.gnu.org
> Subject: [Patch/ARM] Cortex-M4 core pipeline patch to tune LDR/STR pairs
>
> Hello,
>
> The attached pipeline patch intends to turn following code generation
>
> ldr r5, [r4, #12]
> adds r2, r2, #16
> str r5, [r3, #8]
>
Hello,
The attached pipeline patch intends to turn following code generation
ldr r5, [r4, #12]
adds r2, r2, #16
str r5, [r3, #8]
to
ldr r5, [r4, #12]
str r5, [r3, #8]
adds r2, r2, #16
The reason is that the STR can be started from the second cycle of its
preceding LDR which takes 2 cycles, as
