Floating-point Merge InstructionFloating-point Merge Instructionfmerge
Instruction Type F
Format
(qp) fmerge.ns f1 = f2, f3 neg_sign_form
(qp) fmerge.s f1 = f2, f3 sign_form
(qp) fmerge.se f1 = f2, f3 sign_exp_form
Description
Sign, exponent and significand fields are extracted from f2 and FR f3, combined, and the result is placed in FR f1.
For the neg_sign_form, the sign of FR f2 is negated and concatenated with the exponent and the significand of FR f3. This form can be used to negate a floating-point number by using the same register for FR f2 and FR f3.
For the sign_form, the sign of FR f2 is concatenated with the exponent and the significand of FR f3.
For the sign_exp_form, the sign and exponent of FR f2 is concatenated with the significand of FR f3.
For all three forms, if the value in either FR f2 or in FR f3 is NaTVal, then FR f1 is set to NaTVal.
Click to see examples of all forms of fmerge operation together.
fabs - Floating-point Absolute Value Instruction
fadd - Floating-point Add Instruction
famax - Floating-point Absolute Maximum Instruction
famin - Floating-point Absolute Minimum Instruction
fchkf - Floating-point Check Flags Instruction
fclass - Floating-point Class Instruction
fclrf - Floating-point Clear Flags Instruction
fcmp - Floating-point Compare Instruction
fcvt.xuf - Convert Unsigned Integer to Floating-point Instruction
Floating-Point Arithmetic Instructions
Floating-Point Memory Access Instructions
Floating-Point Non-Arithmetic Instructions
Floating-Point Pseudo-Operations
Floating-Point Register Transfer Instructions
Floating-Point Status Register (FPSR) Status Field Instructions
fma - Floating-point Multiply Add Instruction
fmax - Floating-point Maximum Instruction
fmin - Floating-point Minimum Instruction
fmix - Floating-point Mix Instruction
fmpy - Floating-point Multiply Instruction
fms - Floating-point Multiply Subtract Instruction
fneg - Floating-point Negate Instruction
fnegabs - Floating-point Negate Absolute Value Instruction
fnma - Floating-point Negative Multiply Add Instruction
fnmpy - Floating-point Negative Multiply Instruction
fnorm - Floating-point Normalize Instruction
for - Floating-point OR Instruction
fpabs - Floating-point Parallel Absolute Value Instruction
fpack - Floating-point Pack Instruction
fpamax - Floating-point Parallel Absolute Value Maximum Instruction
fpamin - Floating-point Parallel Absolute Value Minimum Instruction
fpcmp - Floating-point Parallel Compare Instruction
fpcvt.fx - Convert Parallel Floating-point to Integer Instruction
fpma - Floating-point Parallel Multiply Add Instruction
fpmax - Floating-point Parallel Maximum Instruction
fpmerge - Floating-point Parallel Merge Instructions
fpmin - Floating-point Parallel Minimum Instruction
fpmpy - Floating-point Parallel Multiply Instruction
fpms - Floating-point Parallel Multiply Subtract Instruction
fpneg - Floating-point Parallel Negate Instruction
fpnegabs - Floating-point Parallel Negate Absolute Value Instruction
fpnma - Floating-point Parallel Negative Multiply Add Instruction
fpnmpy - Floating-point Parallel Negative Multiply Instruction
fprcpa - Floating-point Parallel Reciprocal Approximation Instruction
fprsqrta - Floating-point Parallel Reciprocal Square Root Approximation Instruction
frcpa - Floating-point Reciprocal Approximation Instruction
frsqrta - Floating-point Reciprocal Square Root Approximation Instruction
fselect - Floating-point Select Instruction
fsetc - Floating-point Set Controls Instruction
fsub - Floating-point Subtract Instruction
fswap - Floating-point Swap Instruction
fsxt - Floating-point Sign Extend Instruction
fwb - Flush Write Buffers Instruction
fxor - Floating-point Exclusive Or Instruction
getf - Get Floating-point Value or Exponent or Significand Instruction
Integer Multiply and Add (in FP Unit) Instructions
ldf - Floating-point Load Instruction
ldfp - Floating-point Load Pair Instruction
mov fr - Move Floating-point Register Instruction
psad1 - Parallel Sum of Absolute Difference Instruction
setf - Set Floating-point Value, Exponent, or Significand Instruction