On Friday, 20 July 2018 at 11:11:12 UTC, Mike Franklin wrote:
I ask for any insight you might have, should you wish to give
this your attention. Regardless, I'll keep investigating.
Just to follow up, after I enabled `-funroll-loops` for GDC, it
was almost twice as fast as LDC, though the co
On Friday, 20 July 2018 at 12:49:59 UTC, Mike Franklin wrote:
GDC
---
arm-none-eabi-gdc -c -O2 -nophoboslib -nostdinc -nodefaultlibs
-nostdlib -mthumb -mcpu=cortex-m4 -mtune=cortex-m4
-mfloat-abi=hard -Isource/runtime -fno-bounds-check
-ffunction-sections -fdata-sections -fno-weak
_D5board3
Actually the assembly output from objdump isn't quite accurate.
Here's the generated assembly from the compiler.
LDC
---
ldc2 -conf= -disable-simplify-libcalls -c -Os
-mtriple=thumb-none-eabi -float-abi=hard -mcpu=cortex-m4
-Isource/runtime -boundscheck=off
_D5board3lcd8fillRectFiikktZv:
I've finally succeeded in getting a build of my STM32 ARM
Cortex-M proof of concept in LDC and GDC, thanks to the recent
changes in both compilers. So, I now have a way to compare code
generation between the two compilers.
The project is extremely simple; it just generates a bunch of
random
