From: Sebastian <git@sraa.de>
Date: Fri, 25 Jul 2014 14:07:09 +0000 (+0000)
Subject: Makefile: run everything internally with float
X-Git-Url: http://sraa.de/git/?a=commitdiff_plain;h=57534c6c26fafacd5344bfd09d5bf486327e659d;p=lattice-boltzmann-epiphany.git

Makefile: run everything internally with float

- treat floating point constants as single precision
  (this removes all dependencies for double)
- use internal.ldf linker script
  (puts libc functions in local memory)

speedup is immense. running code from external memory
is extremely slow, especially when all cores fight for it.
---

diff --git a/lb/Makefile b/lb/Makefile
index 4bb87ae..17728e9 100644
--- a/lb/Makefile
+++ b/lb/Makefile
@@ -9,8 +9,8 @@ ECHO	= /bin/echo -e
 # target toolchain
 ECC	= e-gcc
 EOC	= e-objcopy
-ECFLAGS	= -Os -std=c99 -falign-loops=8 -falign-functions=8 -Wall
-ELFLAGS	= -T$(EPIPHANY_HOME)/bsps/current/fast.ldf -le-lib
+ECFLAGS	= -Os -std=c99 -falign-loops=8 -falign-functions=8 -Wall -fsingle-precision-constant -ffast-math
+ELFLAGS	= -T$(EPIPHANY_HOME)/bsps/current/internal.ldf -le-lib
 EOFLAGS	= -R .shared_dram
 
 # host application