asterwolf · December 9, 2015 19:10 · Dec 9, 2015 · Dec 4, 2015 · Dec 4, 2015
diff --git a/twoDprocessFloat.s b/twoDprocessFloat.s
@@ -36,7 +36,7 @@ LOOP:
 
 L2:
     movb %al, (%edx, %ecx)
-    loop LOOP
+    jmp LOOP
 
 DONE: 
     leave

diff --git a/twoDprocessFloat.s b/twoDprocessFloat.s
@@ -1,4 +1,8 @@
-/** For this assignment you will write an assembly language function (in 32-bit *mode) to manipulate a 2-dimensional array that represents an image. The image *is a bitmapped image, where (at least for the images we will be working with) *each pixel is represented by 3 bytes that indicate how much red, green, and    *blue there is at that location.
+/** For this assignment you will write an assembly language function (in 32-bit 
+* mode) to manipulate a 2-dimensional array that represents an image. The image 
+* is a bitmapped image, where (at least for the images we will be working with) 
+* each pixel is represented by 3 bytes that indicate how much red, green, and    
+* blue there is at that location.
 *  @author:		Diego Diaz
 *  Course:		COMP B13
 *  Created on:  Dec 4, 2015

diff --git a/twoDprocessFloat.s b/twoDprocessFloat.s
@@ -0,0 +1,40 @@
+/** For this assignment you will write an assembly language function (in 32-bit *mode) to manipulate a 2-dimensional array that represents an image. The image *is a bitmapped image, where (at least for the images we will be working with) *each pixel is represented by 3 bytes that indicate how much red, green, and    *blue there is at that location.
+*  @author:		Diego Diaz
+*  Course:		COMP B13
+*  Created on:  Dec 4, 2015
+*  Source File: twoDprocessFloat.s
+*/
+
+    .globl _multiply2Dfloat
+_multiply2Dfloat:
+    pushl %ebp
+    movl %esp, %ebp
+    subl $12, %esp
+
+    flds 20(%ebp)
+    movl 12(%ebp), %eax #stores rows into eax
+    movl 16(%ebp), %ecx #stores cols into ecx
+    imull %eax, %ecx #stores rows * cols into ecx
+    movl 8(%ebp), %edx  #stores array in edx
+
+LOOP:
+    subl $1, %ecx   #decrements 1 from array offset
+    js DONE     #if sign flag is set, array is done and jumps to DONE
+    movzbl (%edx, %ecx), %eax   #stores content of array in eax as a long
+    movl %eax, (%esp)
+    fild (%esp) #loads the content of the array onto the float stack
+    fmul %st(1), %st(0)   #multiplies to content by the factor and stores in %st
+    fistpl (%esp)   #pops the new value off the floating stack
+    movl (%esp), %eax  #stores the new value in eax
+    cmpl $256, %eax #compares the new value to 256
+    jl L2   # if less than 256, jumps to L2 to put in array
+    movl $255, %eax #if greater than or equals to 256, places 255 instead
+
+L2:
+    movb %al, (%edx, %ecx)
+    loop LOOP
+
+DONE: 
+    leave
+    ret
+