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-rw-r--r--sem4/embedded/emb_m2/myfloat_red.h69
-rw-r--r--sem4/embedded/emb_m4/jrnl/regs.h146
2 files changed, 105 insertions, 110 deletions
diff --git a/sem4/embedded/emb_m2/myfloat_red.h b/sem4/embedded/emb_m2/myfloat_red.h
index b553233..142d0bc 100644
--- a/sem4/embedded/emb_m2/myfloat_red.h
+++ b/sem4/embedded/emb_m2/myfloat_red.h
@@ -4,54 +4,51 @@
*/
//low precision floating pt type
-typedef struct myfloat
-{
- signed char mantissa;
- signed char exponent;
+typedef struct myfloat {
+ signed char mantissa;
+ signed char exponent;
} myfloat_type;
-
//convert from double to low precision type
void doub2mydouble(double arg, myfloat_type *res)
{
- int exponent;
- double temp;
- exponent = ceil(log(abs(arg))/log(2)); //base 2 logarithm
- temp=arg*pow(2,7-exponent);
- res->mantissa = (signed char)temp;
- res->exponent = exponent-7;
+ int exponent;
+ double temp;
+ exponent = ceil(log(abs(arg)) / log(2)); //base 2 logarithm
+ temp = arg * pow(2, 7 - exponent);
+ res->mantissa = (signed char)temp;
+ res->exponent = exponent - 7;
}
//convert from low precision type to double
double myfloat2double(myfloat_type *arg1)
{
- double res = (double)(arg1->mantissa) * pow(2,arg1->exponent);
- return res;
+ double res = (double)(arg1->mantissa) * pow(2, arg1->exponent);
+ return res;
}
//multiply to low precision types
-void mult_float(myfloat_type *arg1,myfloat_type *arg2,myfloat_type *result)
+void mult_float(myfloat_type *arg1, myfloat_type *arg2, myfloat_type *result)
{
- int temp;
- unsigned char sign;
-
- sign=0x80 & ((unsigned char)arg1-> mantissa ^ (unsigned char)arg2-> mantissa); //find sign of result
-
- char i=0;
- temp = (int)(arg1-> mantissa) * (int)(arg2-> mantissa);
-
- temp = temp & 0x7f00; //take away sign from product
-
- while(abs(temp)>128)
- {
- i++;
- temp=temp>>1;
- }
-
- result->mantissa = (unsigned char) temp;
-
- result->mantissa = result->mantissa | sign; //add recorded sign
-
- result->exponent = arg1->exponent + arg2->exponent + i;
-
+ int temp;
+ unsigned char sign;
+
+ sign = 0x80 & ((unsigned char)arg1->mantissa ^
+ (unsigned char)arg2->mantissa); //find sign of result
+
+ char i = 0;
+ temp = (int)(arg1->mantissa) * (int)(arg2->mantissa);
+
+ temp = temp & 0x7f00; //take away sign from product
+
+ while (abs(temp) > 128) {
+ i++;
+ temp = temp >> 1;
+ }
+
+ result->mantissa = (unsigned char)temp;
+
+ result->mantissa = result->mantissa | sign; //add recorded sign
+
+ result->exponent = arg1->exponent + arg2->exponent + i;
}
diff --git a/sem4/embedded/emb_m4/jrnl/regs.h b/sem4/embedded/emb_m4/jrnl/regs.h
index 3f6ae03..cd475f5 100644
--- a/sem4/embedded/emb_m4/jrnl/regs.h
+++ b/sem4/embedded/emb_m4/jrnl/regs.h
@@ -2,80 +2,78 @@
#define REGS_H
// Taken from Jens
-#define PUSHREGS() __asm__ volatile ( \
- "push r1 \n" \
- "push r0 \n" \
- "in r0, __SREG__ \n" \
- "cli \n" \
- "push r0 \n" \
- "cli \n" \
- "push r2 \n" \
- "push r3 \n" \
- "push r4 \n" \
- "push r5 \n" \
- "push r6 \n" \
- "push r7 \n" \
- "push r8 \n" \
- "push r9 \n" \
- "push r10 \n" \
- "push r11 \n" \
- "push r12 \n" \
- "push r13 \n" \
- "push r14 \n" \
- "push r15 \n" \
- "push r16 \n" \
- "push r17 \n" \
- "push r18 \n" \
- "push r19 \n" \
- "push r20 \n" \
- "push r21 \n" \
- "push r22 \n" \
- "push r23 \n" \
- "push r24 \n" \
- "push r25 \n" \
- "push r26 \n" \
- "push r27 \n" \
- "push r28 \n" \
- "push r29 \n" \
- "push r30 \n" \
- "push r31 \n" \
- )
+#define PUSHREGS() \
+ __asm__ volatile("push r1 \n" \
+ "push r0 \n" \
+ "in r0, __SREG__ \n" \
+ "cli \n" \
+ "push r0 \n" \
+ "cli \n" \
+ "push r2 \n" \
+ "push r3 \n" \
+ "push r4 \n" \
+ "push r5 \n" \
+ "push r6 \n" \
+ "push r7 \n" \
+ "push r8 \n" \
+ "push r9 \n" \
+ "push r10 \n" \
+ "push r11 \n" \
+ "push r12 \n" \
+ "push r13 \n" \
+ "push r14 \n" \
+ "push r15 \n" \
+ "push r16 \n" \
+ "push r17 \n" \
+ "push r18 \n" \
+ "push r19 \n" \
+ "push r20 \n" \
+ "push r21 \n" \
+ "push r22 \n" \
+ "push r23 \n" \
+ "push r24 \n" \
+ "push r25 \n" \
+ "push r26 \n" \
+ "push r27 \n" \
+ "push r28 \n" \
+ "push r29 \n" \
+ "push r30 \n" \
+ "push r31 \n")
-#define POPREGS() __asm__ volatile ( \
- "pop r31 \n" \
- "pop r30 \n" \
- "pop r29 \n" \
- "pop r28 \n" \
- "pop r27 \n" \
- "pop r26 \n" \
- "pop r25 \n" \
- "pop r24 \n" \
- "pop r23 \n" \
- "pop r22 \n" \
- "pop r21 \n" \
- "pop r20 \n" \
- "pop r19 \n" \
- "pop r18 \n" \
- "pop r17 \n" \
- "pop r16 \n" \
- "pop r15 \n" \
- "pop r14 \n" \
- "pop r13 \n" \
- "pop r12 \n" \
- "pop r11 \n" \
- "pop r10 \n" \
- "pop r9 \n" \
- "pop r8 \n" \
- "pop r7 \n" \
- "pop r6 \n" \
- "pop r5 \n" \
- "pop r4 \n" \
- "pop r3 \n" \
- "pop r2 \n" \
- "pop r0 \n" \
- "out __SREG__, r0 \n" \
- "pop r0 \n" \
- "pop r1 \n" \
- )
+#define POPREGS() \
+ __asm__ volatile("pop r31 \n" \
+ "pop r30 \n" \
+ "pop r29 \n" \
+ "pop r28 \n" \
+ "pop r27 \n" \
+ "pop r26 \n" \
+ "pop r25 \n" \
+ "pop r24 \n" \
+ "pop r23 \n" \
+ "pop r22 \n" \
+ "pop r21 \n" \
+ "pop r20 \n" \
+ "pop r19 \n" \
+ "pop r18 \n" \
+ "pop r17 \n" \
+ "pop r16 \n" \
+ "pop r15 \n" \
+ "pop r14 \n" \
+ "pop r13 \n" \
+ "pop r12 \n" \
+ "pop r11 \n" \
+ "pop r10 \n" \
+ "pop r9 \n" \
+ "pop r8 \n" \
+ "pop r7 \n" \
+ "pop r6 \n" \
+ "pop r5 \n" \
+ "pop r4 \n" \
+ "pop r3 \n" \
+ "pop r2 \n" \
+ "pop r0 \n" \
+ "out __SREG__, r0 \n" \
+ "pop r0 \n" \
+ "pop r1 \n")
#endif
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