From 50a81414a7023c6574ec69af784db97de349bc75 Mon Sep 17 00:00:00 2001
From: Thierry-Santos <thierrybarbosasantos@gmail.com>
Date: Wed, 28 Mar 2018 10:06:40 -0300
Subject: [PATCH] Tarefa 1,2

---
 ex2.c   | 45 +++++++++++++++++++++++++++++++++++++++++++++
 ex3.1.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 ex3.2.c | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 133 insertions(+)
 create mode 100644 ex2.c
 create mode 100644 ex3.1.c
 create mode 100644 ex3.2.c

diff --git a/ex2.c b/ex2.c
new file mode 100644
index 0000000..72d32e0
--- /dev/null
+++ b/ex2.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+
+#include <immintrin.h>
+
+void crepusculo(float *imgin, float *imgout, __m256 intens)
+{
+  __m256 vimgin = _mm256_load_ps (imgin);
+  __m256 vimgout = _mm256_add_ps (vimgin, intens);
+  _mm256_store_ps(imgout, vimgout);
+
+  /* Equivalente Assembly 
+  ** mov eax, a
+  ** mov edx, b 
+  ** mov ecx, c
+  ** movaps xmm0, XMMWORD PTR [eax]
+  ** addps xmm0, XMMWORD PTR [edx]
+  ** movaps XMMWORD PTR [ecx], xmm0
+  */
+}
+
+int main (int argc, char *argv[])
+{
+
+    __m256 intens = _mm256_set1_ps(50);
+
+  float *imgin = (float*)_mm_malloc (sizeof(float) *96, 32); //aloca um vetor de 32 bytes (256 bits) alinhado em endereços múltiplos de 16 bytes.
+  float *imgout = (float*)_mm_malloc (sizeof(float) *96, 32);
+  
+  int i = 0;
+  
+    for (i = 0; i < 96; ++i) {
+      imgin[i] = i;
+    }
+
+  for (i = 0; i <= 96 - 8; i+=8) {
+      crepusculo(&imgin[i], &imgout[i], intens);
+  }
+
+  printf("Vai da certo");
+
+      for (i = 0; i < 96; ++i) {
+        printf("%f\n",imgout[i]);
+      }
+
+  }
\ No newline at end of file
diff --git a/ex3.1.c b/ex3.1.c
new file mode 100644
index 0000000..be6f458
--- /dev/null
+++ b/ex3.1.c
@@ -0,0 +1,49 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <limits.h>
+#include <immintrin.h> // AVX MUITO LOCO - novo Hero da Marvel
+#define MAX 50000
+
+void produtoEscalar(int imgIn[], int mult[], int result[], int n)
+{
+   	int  i, j;
+    for (i = 0; i < n; i++){
+    	for(j=0;j<3;j++){
+   	    	result[i] += imgIn[i]*mult[j];
+   		}
+    }
+}
+
+
+int main()
+{
+	int i = 0;
+	srand(time(NULL));
+	int imgIn[MAX]; 
+  	int result[MAX];
+  	int mult[3] = {1,2,3};
+
+  	for(i=0;i<MAX;i++){
+		result[i] = 0;	
+	}
+
+	for(i=0;i<MAX;i++){
+		imgIn[i] = rand() % 10;	
+	}
+
+
+	clock_t tic = clock();
+
+	for(i=0;i<50;i++){
+
+		produtoEscalar(imgIn, mult, result, MAX);   
+
+	}
+
+    clock_t toc = clock();
+
+    printf("Elapsed: %f seconds\n", (double)(toc - tic) / CLOCKS_PER_SEC);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/ex3.2.c b/ex3.2.c
new file mode 100644
index 0000000..613cf9e
--- /dev/null
+++ b/ex3.2.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <limits.h>
+#include <immintrin.h> // AVX MUITO LOCO - novo Hero da Marvel
+#define MAX 50000
+
+int main(){
+
+	float *imgIn = (float*)_mm_malloc (sizeof(float) * MAX, 32);
+  	float *imgOut = (float*)_mm_malloc (sizeof(float) * MAX, 32);
+  	float *mult = (float*)_mm_malloc (sizeof(float) * 8, 32);
+  	mult[0] = 1;
+  	mult[1] = 2;
+  	mult[2] = 3;
+  	int i = 0, j = 0, k = 0;
+
+	for (i = 0; i < MAX; i++) {
+   		imgOut[i] = 0;
+  	} 	
+  	
+  	__m256 vImgIn = _mm256_load_ps(imgIn);
+  	__m256 vImgOut = _mm256_load_ps(imgOut);  	
+	__m256 vmult = _mm256_load_ps(mult);
+	
+ 	clock_t tic = clock();
+ 	
+	for(k = 0;k<50;k++){	
+	  	for(i=0;i<=MAX-8;i+=8){
+	  		for(j=0;j<3;j++){
+	  			vImgOut += _mm256_mul_ps(vImgIn, vmult);
+	  		}
+	  	}
+	}
+	clock_t toc = clock();
+
+  	printf("\n\n Essa bagaca demorou: %f fuking segundos\n", (double)(toc - tic) / CLOCKS_PER_SEC);
+
+}