revert app change

sw/applications/example_asm/add.s

@@ -2,21 +2,5 @@
     .globl add_asm_function
 
 add_asm_function:
-    flw	f0,0(a0)
-    flw	f1,0(a1)
-    #check if it gets executed in a branch shadow
-    li t0, 100
-    loop1:
-    fadd.s fa0, f0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    addi t0,t0,-1
-    bnez t0, loop1
+    add a0, a0, a1   # Add the values in a0 and a1, store the result in a0
     ret              # Return from the function

sw/applications/example_asm/main.c

@@ -1,11 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include "constants.h"
-#include "csr.h"
 #include "x-heep.h"
-#include "timer_sdk.h"
-
-#define FS_INITIAL 0x01
 
 /* By default, printfs are activated for FPGA and disabled for simulation. */
 #define PRINTF_IN_FPGA  1
@@ -19,35 +15,17 @@
     #define PRINTF(...)
 #endif
 
-void __attribute__((aligned(4), interrupt)) handler_irq_timer(void) {
-    timer_arm_stop();
-    timer_irq_clear();
-    return;   
-}
-
-extern float add_asm_function(float* a, float* b);
-extern float add_asm_function2(float* a, float* b);
+extern int add_asm_function(int a, int b);
+extern int mul_by_const_asm_function( int a);
 
 int main() {
+    int num1 = 10;
+    int num2 = 20;
+    int sum = add_asm_function(num1, num2);
+    int mul = mul_by_const_asm_function(num2);
 
-    //enable FP operations
-    CSR_SET_BITS(CSR_REG_MSTATUS, (FS_INITIAL << 13));
-    CSR_SET_BITS(CSR_REG_MSTATUS, 0x8);
-    // Set mie.MEIE bit to one to enable machine-level external interrupts
-    const uint32_t mask = 1 << 7;
-    CSR_SET_BITS(CSR_REG_MIE, mask);
-
-    timer_init();
-    timer_irq_enable();
-    timer_arm_start(4);
-
-    float num1 = 10.0;
-    float num2 = 20.0;
-    float sum = add_asm_function2(&num1, &num2);
-//    int mul = mul_by_const_asm_function(num2);
-
-//    PRINTF("%d+%d=%d\n", num1, num2, sum);
-//    PRINTF("%d*%d=%d\n", num2, MULTIPLY_CONSTANT, mul );
+    PRINTF("%d+%d=%d\n", num1, num2, sum);
+    PRINTF("%d*%d=%d\n", num2, MULTIPLY_CONSTANT, mul );
 
-    return (sum == num1+num2) ? EXIT_SUCCESS : EXIT_FAILURE;   
+    return (sum == num1+num2) && (mul == num2*MULTIPLY_CONSTANT) ? EXIT_SUCCESS : EXIT_FAILURE;   
 }

sw/applications/example_asm/multiply.S

@@ -1,24 +1,9 @@
+#include "constants.h"
+
     .section .text
-    .globl add_asm_function2
+    .globl mul_by_const_asm_function
 
-add_asm_function2:
-    flw	f0,0(a0)
-    flw	f1,0(a1)
-    #check if it gets executed in a branch shadow
-    cv.starti 0, start_loop
-    cv.endi   0, end_loop
-    cv.counti  0, 100
-    start_loop:
-    .balign 4
-    fadd.s fa0, f0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    fadd.s fa0, fa0, f1   # Add the values in a0 and a1, store the result in a0
-    end_loop:
-    ret              # Return from the function
+mul_by_const_asm_function:
+    li t0, MULTIPLY_CONSTANT    # Load the constant into temporary register t0
+    mul a0, a0, t0              # Multiply the value in a0 by the constant in t0
+    ret                         # Return from the function