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Intel が提供する SSE2 を使用する乱数ジェネレーター関数をコンパイルしようとしています。次のコードをコンパイルしようとすると:

/////////////////////////////////////////////////////////////////////////////
// The Software is provided "AS IS" and possibly with faults. 
// Intel disclaims any and all warranties and guarantees, express, implied or
// otherwise, arising, with respect to the software delivered hereunder,
// including but not limited to the warranty of merchantability, the warranty
// of fitness for a particular purpose, and any warranty of non-infringement
// of the intellectual property rights of any third party.
// Intel neither assumes nor authorizes any person to assume for it any other
// liability. Customer will use the software at its own risk. Intel will not
// be liable to customer for any direct or indirect damages incurred in using
// the software. In no event will Intel be liable for loss of profits, loss of
// use, loss of data, business interruption, nor for punitive, incidental,
// consequential, or special damages of any kind, even if advised of
// the possibility of such damages.
//
// Copyright (c) 2003 Intel Corporation
//
// Third-party brands and names are the property of their respective owners
//
///////////////////////////////////////////////////////////////////////////
// Random Number Generation for SSE / SSE2
// Source File
// Version 0.1
// Author Kipp Owens, Rajiv Parikh
////////////////////////////////////////////////////////////////////////



#ifndef RAND_SSE_H
#define RAND_SSE_H
#include "emmintrin.h"
#include <time.h>

//#define COMPATABILITY
//define this if you wish to return values similar to the standard rand();


void srand_sse( unsigned int seed );
void rand_sse( unsigned int* );

__declspec( align(16) ) static __m128i cur_seed;

void srand_sse( unsigned int seed ) {
    cur_seed = _mm_set_epi32( seed, seed+1, seed, seed+1 );
}

inline void rand_sse( unsigned int* result ) {
    __declspec( align(16) ) __m128i cur_seed_split;
    __declspec( align(16) ) __m128i multiplier;
    __declspec( align(16) ) __m128i adder;
    __declspec( align(16) ) __m128i mod_mask;
    __declspec( align(16) ) __m128i sra_mask;
    __declspec( align(16) ) __m128i sseresult;
    __declspec( align(16) ) static const unsigned int mult[4] = { 214013, 17405, 214013, 69069 };
    __declspec( align(16) ) static const unsigned int gadd[4] = { 2531011, 10395331, 13737667, 1 };
    __declspec( align(16) ) static const unsigned int mask[4] = { 0xFFFFFFFF, 0, 0xFFFFFFFF, 0 };
    __declspec( align(16) ) static const unsigned int masklo[4] = { 0x00007FFF, 0x00007FFF, 0x00007FFF, 0x00007FFF };

    adder = _mm_load_si128( (__m128i*) gadd);
    multiplier = _mm_load_si128( (__m128i*) mult);
    mod_mask = _mm_load_si128( (__m128i*) mask);
    sra_mask = _mm_load_si128( (__m128i*) masklo);
    cur_seed_split = _mm_shuffle_epi32( cur_seed, _MM_SHUFFLE( 2, 3, 0, 1 ) );

    cur_seed = _mm_mul_epu32( cur_seed, multiplier );
    multiplier = _mm_shuffle_epi32( multiplier, _MM_SHUFFLE( 2, 3, 0, 1 ) );
    cur_seed_split = _mm_mul_epu32( cur_seed_split, multiplier );

    cur_seed = _mm_and_si128( cur_seed, mod_mask);
    cur_seed_split = _mm_and_si128( cur_seed_split, mod_mask );
    cur_seed_split = _mm_shuffle_epi32( cur_seed_split, _MM_SHUFFLE( 2, 3, 0, 1 ) );
    cur_seed = _mm_or_si128( cur_seed, cur_seed_split );
    cur_seed = _mm_add_epi32( cur_seed, adder);

    #ifdef COMPATABILITY

    // Add the lines below if you wish to reduce your results to 16-bit vals...
    sseresult = _mm_srai_epi32( cur_seed, 16);
    sseresult = _mm_and_si128( sseresult, sra_mask );
    _mm_storeu_si128( (__m128i*) result, sseresult );
    return;

    #endif

    _mm_storeu_si128( (__m128i*) result, cur_seed);
    return;
}

#endif

int main() {
    srand_see(time(0));

    return 0;
}

エラーが発生します：

rand_sse.cpp:40:11: error: expected constructor, destructor, or type conversion before ‘(’ token
rand_sse.cpp: In function ‘void srand_sse(unsigned int)’:
rand_sse.cpp:43:5: error: ‘cur_seed’ was not declared in this scope
rand_sse.cpp: In function ‘void rand_sse(unsigned int*)’:
rand_sse.cpp:47:25: error: ‘align’ was not declared in this scope
rand_sse.cpp:47:27: error: ‘__declspec’ was not declared in this scope
rand_sse.cpp:47:29: error: expected ‘;’ before ‘__m128i’
rand_sse.cpp:48:29: error: expected ‘;’ before ‘__m128i’
rand_sse.cpp:49:29: error: expected ‘;’ before ‘__m128i’
rand_sse.cpp:50:29: error: expected ‘;’ before ‘__m128i’
rand_sse.cpp:51:29: error: expected ‘;’ before ‘__m128i’
rand_sse.cpp:52:29: error: expected ‘;’ before ‘__m128i’
rand_sse.cpp:53:29: error: expected ‘;’ before ‘static’
rand_sse.cpp:54:29: error: expected ‘;’ before ‘static’
rand_sse.cpp:55:29: error: expected ‘;’ before ‘static’
rand_sse.cpp:56:29: error: expected ‘;’ before ‘static’
rand_sse.cpp:58:5: error: ‘adder’ was not declared in this scope
rand_sse.cpp:58:40: error: ‘gadd’ was not declared in this scope
rand_sse.cpp:59:5: error: ‘multiplier’ was not declared in this scope
rand_sse.cpp:59:45: error: ‘mult’ was not declared in this scope
rand_sse.cpp:60:5: error: ‘mod_mask’ was not declared in this scope
rand_sse.cpp:60:43: error: ‘mask’ was not declared in this scope
rand_sse.cpp:61:5: error: ‘sra_mask’ was not declared in this scope
rand_sse.cpp:61:43: error: ‘masklo’ was not declared in this scope
rand_sse.cpp:62:5: error: ‘cur_seed_split’ was not declared in this scope
rand_sse.cpp:62:41: error: ‘cur_seed’ was not declared in this scope

コードは以下から取得されます: Intel Ubuntu 64 ビットおよび GCC 4.6.3 で次のコマンドを使用してコンパイルされます。

g++ rand_sse.cpp -O2 -march=core2 -msse2 -o rand_sse

私は何が欠けていますか？私が間違っていることについてのアドバイスは非常に役に立ちます。ありがとう！

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1 に答える 1

10

__declspec (align(16))パーツを外すだけ。types__m128などは、適切な配置で既に宣言されています。

PS。OK、いくつかの配列もあります.GCCの方法は__attribute__ ((aligned(16))).

その配置属性がなくても問題なく機能しますが、効率は低下します。

于 2012-11-29T14:47:14.363 に答える