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| author | Kevin O'Connor <kevin@koconnor.net> | 2018-10-12 23:23:15 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2018-10-13 11:52:24 -0400 |
| commit | 67278a6d8abe44a7f15fbbb8cefc334ee53feea3 (patch) | |
| tree | 2a90cb0dd4d9812b750d11d10f2a779b7cfb5ab1 | |
| parent | fb798e3cbafc095f930e2a925b9e0e200395baa4 (diff) | |
| download | kutter-67278a6d8abe44a7f15fbbb8cefc334ee53feea3.tar.gz kutter-67278a6d8abe44a7f15fbbb8cefc334ee53feea3.tar.xz kutter-67278a6d8abe44a7f15fbbb8cefc334ee53feea3.zip | |
sam3x8e: Align loops to a 16 byte boundary
It appears the sam3x8e has a primitive cache prefetch mechanism (it
prefetches 32 bytes at a time aligned to a 16 byte boundary).
Aligning the main loop in timer_dispatch_many() to a 16 byte boundary
significantly improves performance.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
| -rw-r--r-- | src/sam3x8e/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/sam3x8e/Makefile b/src/sam3x8e/Makefile index ee144a02..c5e0607b 100644 --- a/src/sam3x8e/Makefile +++ b/src/sam3x8e/Makefile @@ -6,7 +6,7 @@ CROSS_PREFIX=arm-none-eabi- dirs-y += src/sam3x8e src/generic dirs-y += lib/sam3x/gcc/gcc -CFLAGS += -mthumb -mcpu=cortex-m3 +CFLAGS += -mthumb -mcpu=cortex-m3 -falign-loops=16 CFLAGS += -Ilib/sam3x/include -Ilib/cmsis-core CFLAGS += -D__SAM3X8E__ |