[r...@meilk /usr/src/sys/i386/compile/AARON]# make
CC='cc' make -f ../../../dev/aic7xxx/aicasm/Makefile
MAKESRCPATH=../../../dev/aic7xxx/aicasm
Warning: Object directory not changed from original
/usr/src/sys/i386/compile/AARON
cc -O2 -pipe -march=i686 -ffast-math -mfpmath=sse -O3 -nostdinc
On Tue, 2 Mar 2010 23:26:20 +0200, Dan Naumov dan.nau...@gmail.com wrote:
See the section 3.17.14 Intel 386 and AMD x86-64 Options in the gcc
Info manual. It contains a full list of the supported CPU-TYPE values
for the -mtune=CPU-TYPE option. The -march=CPU-TYPE option accepts the
same CPU
applications.
#
.if ${MACHINE_ARCH} == i386 ${CC} != icc
CFLAGS+=-mno-align-long-strings -mpreferred-stack-boundary=2 \
-mno-mmx -mno-3dnow -mno-sse -mno-sse2
INLINE_LIMIT?= 8000
.endif
Trying to override the default compiler flags to force it to use SSE is simply
not going
James Phillips wrote:
I laughed at your question because I remember reading somewhere that using aggressive optimization options is a good way to find compiler bugs. I think that extends of optimizations for new CPU architectures as well.
I also heard kernel code avoids MMX instructions for some
On Sun, 28 Feb 2010 20:38:45 +0800, Aaron Lewis aaron.lewis1...@gmail.com
wrote:
Hi,
I gonna recompile kernel for my core2 CPU , so i'd like to pass some
flags to gcc.
Kinds of -march=core2 , i tried to modify /etc/make.conf
e.gCFLAGS += -march=core2 -O20 -ffast-math
to let gcc select cpu specified asm code ?
Only for some userland stuff like openssl.
Really ? It's bad to use custom flags to compile kernel , why do you
think so ? I'd like to know more about this : )
So setting optimize compiler flags is only useful for userland stuff ?
Please do not post
See the section 3.17.14 Intel 386 and AMD x86-64 Options in the gcc
Info manual. It contains a full list of the supported CPU-TYPE values
for the -mtune=CPU-TYPE option. The -march=CPU-TYPE option accepts the
same CPU types:
`-march=CPU-TYPE'
Generate instructions for the machine
On 28 February 2010 07:38, Aaron Lewis aaron.lewis1...@gmail.com wrote:
Hi,
I gonna recompile kernel for my core2 CPU , so i'd like to pass some flags
to gcc.
Kinds of -march=core2 , i tried to modify /etc/make.conf
e.g CFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
But it
Date: Sun, 28 Feb 2010 22:37:27 +0800
From: Aaron Lewis aaron.lewis1...@gmail.com
Subject: Re: Compiler Flags problem with core2 CPU
To: Paul B Mahol one...@gmail.com
Cc: freebsd-questions@freebsd.org
Message-ID: 4b8a7fa7.1070...@gmail.com
Content-Type: text/plain; charset=ISO-8859-1
Hi,
I gonna recompile kernel for my core2 CPU , so i'd like to pass some
flags to gcc.
Kinds of -march=core2 , i tried to modify /etc/make.conf
e.gCFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
But it fails .. bad arch switch , core2 cpu is not supported ?
And is
On 2/28/10, Aaron Lewis aaron.lewis1...@gmail.com wrote:
Hi,
I gonna recompile kernel for my core2 CPU , so i'd like to pass some
flags to gcc.
Kinds of -march=core2 , i tried to modify /etc/make.conf
e.gCFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
But it fails
Really ? It's bad to use custom flags to compile kernel , why do you
think so ?
I'd like to know more about this : )
So setting optimize compiler flags is only useful for userland stuff ?
Paul B Mahol wrote:
On 2/28/10, Aaron Lewis aaron.lewis1...@gmail.com wrote:
Hi,
I gonna
Do not top post.
On 2/28/10, Aaron Lewis aaron.lewis1...@gmail.com wrote:
Really ? It's bad to use custom flags to compile kernel , why do you
think so ?
I'd like to know more about this : )
Use google.
So setting optimize compiler flags is only useful for userland stuff ?
Paul B Mahol
I am attempting to redo a Gateway GT5220 PC. The CPU is recognized as:
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ (2009.16-MHz 686-class CPU)
Now, would it be advantageous to set the CPU type in the
'/etc/make.conf' and possibly '/etc/src.conf' files.
According to the
On Sunday 28 February 2010 15:31:55 Jerry wrote:
I am attempting to redo a Gateway GT5220 PC. The CPU is recognized as:
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ (2009.16-MHz 686-class
CPU)
Now, would it be advantageous to set the CPU type in the
'/etc/make.conf' and possibly
On Mon, 19 Feb 2007 12:45:51 -0500 Kris Kennaway wrote:
Has anyone got any ideas on how to go on with this?
You'll have to look at the compiler spec and how it is bootstrapped.
That could become quite a project.
FWIW, I don't think there are any secret flags you can set to improve
the
on sparc64 produces v7 code (for sun4/4c) by
default, I went about trying to improve that as v7 code is known to be a
fair bit slower as v9 (sun4u) code. The improvement can be as much as
100% for some apps like OpenSSL or OpenSSH.
I went about trying some Compiler flags. -mcpu=ultrasparc and -mcpu
to improve that as v7 code is known to be a
fair bit slower as v9 (sun4u) code. The improvement can be as much as
100% for some apps like OpenSSL or OpenSSH.
I went about trying some Compiler flags. -mcpu=ultrasparc and -mcpu=v9
both came into mind. However this lead to several problems of programs
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