Cell 编程登堂入室

[root@wq_desktop ~]# mkdir -p /root/sdk3.0
[root@wq_desktop ~]# cd /root/sdk3.0
[root@wq_desktop sdk3.0]# rpm -ivh cell-install-3.0.0-1.0.noarch.rpm 
warning: cell-install-3.0.0-1.0.noarch.rpm: Header V3 DSA 
signature: NOKEY, key ID 9ac02885
Preparing...                ########################################### [100%]
   1:cell-install           ########################################### [100%]
[root@wq_desktop sdk3.0]# cd /opt/cell
[root@wq_desktop cell]# ./cellsdk --gui --iso /root/sdk3.0 install
cellsdk INFO-2023: Trying to install or update cell-product-license
cellsdk INFO-2015: Calling pirut
Loading "installonlyn" plugin
			

[root@wq_desktop ~]# export PATH=/opt/ibm/systemsim-cell/bin:$PATH
[root@wq_desktop ~]# systemsim -g
GUI Enabled
Licensed Materials - Property of IBM.
(C) Copyright IBM Corporation 2001, 2007
All Rights Reserved.
Using initial run script /opt/ibm/systemsim-cell/bin/../lib/cell/systemsim.tcl
GUI not initialized.  Execute tcl command 'gui_init'.
building tree....
clearing existing Openfirmware tree
done building tree.
LOAD : Opening ELF image file: /opt/ibm/systemsim-cell/bin/../images/cell/vmlinux
Elf text start address saved is 0x0000000001000000
Elf_ReadImage: Opening ELF image file: /opt/ibm/systemsim-cell/bin/../images/cell/vmlinux
Elf_ReadImage: alloc-ed 8522472 bytes for
  /opt/ibm/systemsim-cell/bin/../images/cell/vmlinux 
LOAD : ELF startup: PC=0x0000000001000000, msr=0x1000000000000000
LOAD :              gpr[1]=0x000000000FFFFF90, gpr[2]=0x0000000000000000
systemsim %

[root@wq_desktop ~]# mkdir -p test test/ppu test/spu
[root@wq_desktop ~]# cd test
[root@wq_desktop test]# vi Makefile
[root@wq_desktop test]# vi ppu/Makefile
[root@wq_desktop test]# vi spu/Makefile
[root@wq_desktop test]# vi ppu/test_p.c
[root@wq_desktop test]# vi spu/test_spu.c
[root@wq_desktop test]# make

                
				
[root@wq_desktop test]# more Makefile 
DIRS = spu ppu
include /opt/cell/sdk/buildutils/make.footer

[root@wq_desktop test]# more ppu/Makefile 
PROGRAM_ppu :=  ../test
IMPORTS = ../spu/libtest_spu.a -lspe2 -lpthread
include /opt/cell/sdk/buildutils/make.footer

[root@wq_desktop test]# more spu/Makefile 
PROGRAMS_spu    := test_spu
LIBRARY_embed   := libtest_spu.a
include /opt/cell/sdk/buildutils/make.footer

[root@wq_desktop test]# more ppu/test_p.c
#include <pthread.h>
#include <libspe2.h>

#define SPU_THREADS 2

extern spe_program_handle_t test_spu;

void *ppu_pthread_function(void *arg) 
{
    spe_context_ptr_t ctx;
    unsigned int entry = SPE_DEFAULT_ENTRY;
    ctx = *((spe_context_ptr_t *)arg);

    if (spe_context_run(ctx, &entry, 0, NULL, NULL, NULL) < 0) {
        perror ("Failed running context");
        return NULL;
    }

    pthread_exit(NULL);
}


int main ( )
{
    int i;
    spe_context_ptr_t ctxs[SPU_THREADS];
    pthread_t threads[SPU_THREADS];

    for(i=0; i<SPU_THREADS; i++) 
    {
        if ((ctxs[i] = spe_context_create (0, NULL)) == NULL) 
        {
            perror ("Failed creating context");
            return -1;
        }
        if (spe_program_load (ctxs[i], &test_spu)) 
        {
            perror ("Failed loading program");
            return -1;
        }
        if (pthread_create (&threads[i], NULL, &ppu_pthread_function, &ctxs[i]))
  
        {
            perror ("Failed creating thread");
            return -1;
        }
    }

    for (i=0; i<SPU_THREADS; i++) 
    {
        if (pthread_join (threads[i], NULL)) 
        {
            perror("Failed pthread_join");
            return -1;
        }
    }

    return (0);
}
 
[root@wq_desktop test]# more spu/test_spu.c
#include <stdio.h>

int main()
{
    int a[4] = {120, 230, 580, 970};
    float b[4] = {1.8, 1.98, 0.68, 0.7};
    int c[4] = {0};
    int i = 0;

    for( i = 0; i < 4; i ++ )
    {
        c[i] = a[i] * b[i];
        printf("c[%d] = %d\n", i, c[i]);
    }

    return 0;
}

[root@localhost test]# cp spu/test_spu.c spu/test_spu.c.bak
[root@localhost test]# vi spu/test_spu.c

                
[root@localhost test]# more spu/test_spu.c
#include <stdio.h>

int c[4] __attribute__ ((aligned (128)));

int main()
{
    vector signed int a = {120, 230, 580, 970};
    vector float b = {1.8, 1.98, 0.68, 0.7};
    vector signed int cVec;
    vector float tmp;
    int i = 0;

    tmp = spu_convtf( a, 0 );
    tmp = spu_mul( tmp, b );
    cVec = spu_convts( tmp, 0 );
    *(vector signed int *)c = cVec;
    for( i = 0; i < 4; i ++ )
    {
        printf("c[%d] = %d\n", i, c[i]);
    }

    return 0;
}