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NE10_init.c
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/*
* Copyright 2011-12 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "NE10.h"
#include <stdio.h>
#define CPUINFO_BUFFER_SIZE (1024*4)
// This local variable indicates whether or not the running platform supports ARM NEON
arm_result_t is_NEON_available = NE10_ERR;
arm_result_t NE10_HasNEON()
{
return is_NEON_available;
}
arm_result_t NE10_init()
{
FILE* infofile = NULL; // To open the file /proc/cpuinfo
char cpuinfo[CPUINFO_BUFFER_SIZE]; // The buffer to read in the string
size_t bytes = 0; // Numbers of bytes read from the file
int i = 0; // Temporary loop counter
memset( cpuinfo, 0, CPUINFO_BUFFER_SIZE );
infofile = fopen( "/proc/cpuinfo", "r" );
bytes = fread( cpuinfo, 1, sizeof(cpuinfo), infofile );
fclose( infofile );
if( 0 == bytes || CPUINFO_BUFFER_SIZE == bytes )
{
fprintf( stderr, "ERROR: Couldn't read the file \"/proc/cpuinfo\". NE10_init() failed.\n");
return NE10_ERR;
}
while( '\0' != cpuinfo[i] ) cpuinfo[i++] = (char)tolower(cpuinfo[i]);
if ( 0 != strstr(cpuinfo, "neon") )
{
is_NEON_available = NE10_OK;
}
if ( NE10_OK == NE10_HasNEON() )
{
addc_float = addc_float_neon;
addc_vec2f = addc_vec2f_neon;
addc_vec3f = addc_vec3f_neon;
addc_vec4f = addc_vec4f_neon;
subc_float = subc_float_neon;
subc_vec2f = subc_vec2f_neon;
subc_vec3f = subc_vec3f_neon;
subc_vec4f = subc_vec4f_neon;
rsbc_float = rsbc_float_neon;
rsbc_vec2f = rsbc_vec2f_neon;
rsbc_vec3f = rsbc_vec3f_neon;
rsbc_vec4f = rsbc_vec4f_neon;
mulc_float = mulc_float_neon;
mulc_vec2f = mulc_vec2f_neon;
mulc_vec3f = mulc_vec3f_neon;
mulc_vec4f = mulc_vec4f_neon;
divc_float = divc_float_neon;
divc_vec2f = divc_vec2f_neon;
divc_vec3f = divc_vec3f_neon;
divc_vec4f = divc_vec4f_neon;
setc_float = setc_float_neon;
setc_vec2f = setc_vec2f_neon;
setc_vec3f = setc_vec3f_neon;
setc_vec4f = setc_vec4f_neon;
mlac_float = mlac_float_neon;
mlac_vec2f = mlac_vec2f_neon;
mlac_vec3f = mlac_vec3f_neon;
mlac_vec4f = mlac_vec4f_neon;
add_float = add_float_neon;
sub_float = sub_float_neon;
mul_float = mul_float_neon;
div_float = div_float_neon;
mla_float = mla_float_neon;
abs_float = abs_float_neon;
len_vec2f = len_vec2f_neon;
len_vec3f = len_vec3f_neon;
len_vec4f = len_vec4f_neon;
normalize_vec2f = normalize_vec2f_neon;
normalize_vec3f = normalize_vec3f_neon;
normalize_vec4f = normalize_vec4f_neon;
}
else
{
addc_float = addc_float_c;
addc_vec2f = addc_vec2f_c;
addc_vec3f = addc_vec3f_c;
addc_vec4f = addc_vec4f_c;
subc_float = subc_float_c;
subc_vec2f = subc_vec2f_c;
subc_vec3f = subc_vec3f_c;
subc_vec4f = subc_vec4f_c;
rsbc_float = rsbc_float_c;
rsbc_vec2f = rsbc_vec2f_c;
rsbc_vec3f = rsbc_vec3f_c;
rsbc_vec4f = rsbc_vec4f_c;
mulc_float = mulc_float_c;
mulc_vec2f = mulc_vec2f_c;
mulc_vec3f = mulc_vec3f_c;
mulc_vec4f = mulc_vec4f_c;
divc_float = divc_float_c;
divc_vec2f = divc_vec2f_c;
divc_vec3f = divc_vec3f_c;
divc_vec4f = divc_vec4f_c;
setc_float = setc_float_c;
setc_vec2f = setc_vec2f_c;
setc_vec3f = setc_vec3f_c;
setc_vec4f = setc_vec4f_c;
mlac_float = mlac_float_c;
mlac_vec2f = mlac_vec2f_c;
mlac_vec3f = mlac_vec3f_c;
mlac_vec4f = mlac_vec4f_c;
add_float = add_float_c;
sub_float = sub_float_c;
mul_float = mul_float_c;
div_float = div_float_c;
mla_float = mla_float_c;
abs_float = abs_float_c;
len_vec2f = len_vec2f_c;
len_vec3f = len_vec3f_c;
len_vec4f = len_vec4f_c;
normalize_vec2f = normalize_vec2f_c;
normalize_vec3f = normalize_vec3f_c;
normalize_vec4f = normalize_vec4f_c;
}
}
// These are actual definitions of our function pointers that are declared in inc/NE10.h
arm_result_t (*addc_float)(arm_float_t * dst, arm_float_t * src, const arm_float_t cst, unsigned int count);
arm_result_t (*addc_vec2f)(arm_vec2f_t * dst, arm_vec2f_t * src, const arm_vec2f_t * cst, unsigned int count);
arm_result_t (*addc_vec3f)(arm_vec3f_t * dst, arm_vec3f_t * src, const arm_vec3f_t * cst, unsigned int count);
arm_result_t (*addc_vec4f)(arm_vec4f_t * dst, arm_vec4f_t * src, const arm_vec4f_t * cst, unsigned int count);
arm_result_t (*subc_float)(arm_float_t * dst, arm_float_t * src, const arm_float_t cst, unsigned int count);
arm_result_t (*subc_vec2f)(arm_vec2f_t * dst, arm_vec2f_t * src, const arm_vec2f_t * cst, unsigned int count);
arm_result_t (*subc_vec3f)(arm_vec3f_t * dst, arm_vec3f_t * src, const arm_vec3f_t * cst, unsigned int count);
arm_result_t (*subc_vec4f)(arm_vec4f_t * dst, arm_vec4f_t * src, const arm_vec4f_t * cst, unsigned int count);
arm_result_t (*rsbc_float)(arm_float_t * dst, arm_float_t *src, const arm_float_t cst, unsigned int count);
arm_result_t (*rsbc_vec2f)(arm_vec2f_t * dst, arm_vec2f_t * src, const arm_vec2f_t * cst, unsigned int count);
arm_result_t (*rsbc_vec3f)(arm_vec3f_t * dst, arm_vec3f_t * src, const arm_vec3f_t * cst, unsigned int count);
arm_result_t (*rsbc_vec4f)(arm_vec4f_t * dst, arm_vec4f_t * src, const arm_vec4f_t * cst, unsigned int count);
arm_result_t (*mulc_float)(arm_float_t * dst, arm_float_t * src, const arm_float_t cst, unsigned int count);
arm_result_t (*mulc_vec2f)(arm_vec2f_t * dst, arm_vec2f_t * src, const arm_vec2f_t * cst, unsigned int count);
arm_result_t (*mulc_vec3f)(arm_vec3f_t * dst, arm_vec3f_t * src, const arm_vec3f_t * cst, unsigned int count);
arm_result_t (*mulc_vec4f)(arm_vec4f_t * dst, arm_vec4f_t * src, const arm_vec4f_t * cst, unsigned int count);
arm_result_t (*divc_float)(arm_float_t * dst, arm_float_t * src, const arm_float_t cst, unsigned int count);
arm_result_t (*divc_vec2f)(arm_vec2f_t * dst, arm_vec2f_t * src, const arm_vec2f_t * cst, unsigned int count);
arm_result_t (*divc_vec3f)(arm_vec3f_t * dst, arm_vec3f_t * src, const arm_vec3f_t * cst, unsigned int count);
arm_result_t (*divc_vec4f)(arm_vec4f_t * dst, arm_vec4f_t * src, const arm_vec4f_t * cst, unsigned int count);
arm_result_t (*setc_float)(arm_float_t * dst, const arm_float_t cst, unsigned int count);
arm_result_t (*setc_vec2f)(arm_vec2f_t * dst, const arm_vec2f_t * cst, unsigned int count);
arm_result_t (*setc_vec3f)(arm_vec3f_t * dst, const arm_vec3f_t * cst, unsigned int count);
arm_result_t (*setc_vec4f)(arm_vec4f_t * dst, const arm_vec4f_t * cst, unsigned int count);
arm_result_t (*mlac_float)(arm_float_t * dst, arm_float_t * acc, arm_float_t * src, const arm_float_t cst, unsigned int count);
arm_result_t (*mlac_vec2f)(arm_vec2f_t * dst, arm_vec2f_t * acc, arm_vec2f_t * src, const arm_vec2f_t * cst, unsigned int count);
arm_result_t (*mlac_vec3f)(arm_vec3f_t * dst, arm_vec3f_t * acc, arm_vec3f_t * src, const arm_vec3f_t * cst, unsigned int count);
arm_result_t (*mlac_vec4f)(arm_vec4f_t * dst, arm_vec4f_t * acc, arm_vec4f_t * src, const arm_vec4f_t * cst, unsigned int count);
arm_result_t (*add_float)(arm_float_t * dst, arm_float_t * src1, arm_float_t * src2, unsigned int count);
arm_result_t (*sub_float)(arm_float_t * dst, arm_float_t * src1, arm_float_t * src2, unsigned int count);
arm_result_t (*mul_float)(arm_float_t * dst, arm_float_t * src1, arm_float_t * src2, unsigned int count);
arm_result_t (*div_float)(arm_float_t * dst, arm_float_t * src1, arm_float_t * src2, unsigned int count);
arm_result_t (*mla_float)(arm_float_t * dst, arm_float_t * acc, arm_float_t * src1, arm_float_t * src2, unsigned int count);
arm_result_t (*abs_float)(arm_float_t * dst, arm_float_t * src, unsigned int count);
arm_result_t (*len_vec2f)(arm_float_t * dst, arm_vec2f_t * src, unsigned int count);
arm_result_t (*len_vec3f)(arm_float_t * dst, arm_vec3f_t * src, unsigned int count);
arm_result_t (*len_vec4f)(arm_float_t * dst, arm_vec4f_t * src, unsigned int count);
arm_result_t (*normalize_vec2f)(arm_vec2f_t * dst, arm_vec2f_t * src, unsigned int count);
arm_result_t (*normalize_vec3f)(arm_vec3f_t * dst, arm_vec3f_t * src, unsigned int count);
arm_result_t (*normalize_vec4f)(arm_vec4f_t * dst, arm_vec4f_t * src, unsigned int count);