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# ECT 464 PowerPoint PPT Presentation

ECT 464. Lecture 12 Advanced Math Instructions. Today’s Quote: It’s the little things in life that determine the big things.

ECT 464

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## ECT 464

Lecture 12

Today’s Quote:

It’s the little things in life that determine the big things.

His master replied, 'Well done, good and faithful servant! You have been faithful with a few things; I will put you in charge of many things. Come and share your master's happiness!'

Matthew 25:21

### Scale Data (SCL)

• The SCL instruction is used to produce a scaled output value that has a linear relationship.

• Source and Destination must be addresses.

• Rate is divided by 10000.

• Offset can be an address or constant

• Changes Carry, Overflow, Zero, and Sign bits

### Scale with Parameters (SCP)

• The SCP instruction is used to produce a scaled output value that has a linear relationship between the input and scaled values.

• Input and Output Values must be addresses.

• Input Min and Max can be addresses or constants.

• Scaled Min and Max can be addresses or constants.

• Changes Carry, Overflow, Zero, and Sign bits

### Absolute (ABS)

• The ABS instruction takes the absolute value of the Source and places it in the Destination.

• Source and Destination must be addresses.

• Changes Carry, Overflow, Zero, and Sign bits

### Compute (CPT)

• The CPT instruction performs copy, arithmetic, logical, and conversion operations. You define the operation in the expression and the result is written in the destination.

• Changes Carry, Overflow, Zero, and Sign bits

• Example Expression:

SQR((N7:1 ** 2) + (N7:2 ** 2))

** means ^

### Swap (SWP)

• Use the SWP instruction to swap the low and high bytes of a specified number of words in a bit, integer, or string file. The SWP instruction has 2 operands:

• Source is the word address containing the words to be swapped.

• Length is the number of words to be swapped, regardless of the file type.

### Sine (SIN)

• Use the SIN instruction to take the sine of a number and store the result in the destination.

• Source must be between -205887 and 205887.

• Changes Carry, Overflow, Zero, and Sign bits

### Arc Sine (ASN)

• Use the ASN instruction to take the arc sine of a number and store the result in the destination.

• Source must be between -1 and 1.

• Changes Carry, Overflow, Zero, and Sign bits

### Cosine (COS)

• Use the COS instruction to take the cosine of a number and store the result in the destination.

• Source must be between -205887 and 205887.

• Changes Carry, Overflow, Zero, and Sign bits

### Arc Cosine (ACS)

• Use the ACS instruction to take the arc cosine of a number and store the result in the destination.

• Source must be between -1 and 1.

• Changes Carry, Overflow, Zero, and Sign bits

### Tangent (TAN)

• Use the TAN instruction to take the tangent of a number and store the result in the destination.

• Source must be between -205887 and 205887.

• Changes Carry, Overflow, Zero, and Sign bits

### Arc Tangent (ATN)

• Use the ATN instruction to take the arc tangent of a number and store the result in the destination.

• Source must be between -1 and 1.

• Changes Carry, Overflow, Zero, and Sign bits

### Natural Log (LN)

• Use the LN instruction to take the natural log of a number and store the result in the destination.

• Source must be between -87 and 88.

• Changes Carry, Overflow, Zero, and Sign bits

### Log to the Base 10 (LOG)

• Use the LOG instruction to take the log base 10 of a number and store the result in the destination.

• Source must be between -38 and 38.

• Changes Carry, Overflow, Zero, and Sign bits

### X to the Power of Y (XPY)

• Use the XPY instruction to raise a value (Source A) to a power (Source B) and store the result in the destination.

• Changes Carry, Overflow, Zero, and Sign bits

• The XPY instruction uses the following algorithm:

XPY = 2 ** (Y log2(X))