PFRCPIT2
Usage: PFRCPIT2 dest,src Modifies flags: None
Performs the second and final intermediate step in the Newton-Raphson iteration to refine the reciprocal or reciprocal square root approximation produced by the PFRCP and PFSQRT instructions, respectively.
Packed Single-Precision FP Reciprocal/ Reciprocal Square Root, Second Iteration Step
PFRCPIT2 mm1,mm2/m64 ; 0F 0F /r B6 [PENT,3DNOW]
PFRCPIT2 performs the second and final intermediate step in the calculation of a reciprocal or reciprocal square root, refining the values returned by the PFRCP and PFRSQRT instructions, respectively.
The first source value (mm1) is the output of either a PFRCPIT1 or a PFRSQIT1 instruction, and the second source is the output of either the PFRCP or the PFRSQRT instruction. For more details, see the AMD 3DNow! technology manual.
Example:
pfrcpit2 mm1 mm2
PFRCPIT2
Usage: PFRCPIT2 dest,src Modifies flags: None
Performs the second and final intermediate step in the Newton-Raphson iteration to refine the reciprocal or reciprocal square root approximation produced by the PFRCP and PFSQRT instructions, respectively.
Packed Single-Precision FP Reciprocal/ Reciprocal Square Root, Second Iteration Step
PFRCPIT2 mm1,mm2/m64 ; 0F 0F /r B6 [PENT,3DNOW]
PFRCPIT2 performs the second and final intermediate step in the calculation of a reciprocal or reciprocal square root, refining the values returned by the PFRCP and PFRSQRT instructions, respectively.
The first source value (mm1) is the output of either a PFRCPIT1 or a PFRSQIT1 instruction, and the second source is the output of either the PFRCP or the PFRSQRT instruction. For more details, see the AMD 3DNow! technology manual.
Example:
pfrcpit2 mm1 mm2
PFRCPIT2
Usage: PFRCPIT2 dest,src Modifies flags: None
Performs the second and final intermediate step in the Newton-Raphson iteration to refine the reciprocal or reciprocal square root approximation produced by the PFRCP and PFSQRT instructions, respectively.
Packed Single-Precision FP Reciprocal/ Reciprocal Square Root, Second Iteration Step
PFRCPIT2 mm1,mm2/m64 ; 0F 0F /r B6 [PENT,3DNOW]
PFRCPIT2 performs the second and final intermediate step in the calculation of a reciprocal or reciprocal square root, refining the values returned by the PFRCP and PFRSQRT instructions, respectively.
The first source value (mm1) is the output of either a PFRCPIT1 or a PFRSQIT1 instruction, and the second source is the output of either the PFRCP or the PFRSQRT instruction. For more details, see the AMD 3DNow! technology manual.
Example:
pfrcpit2 mm1 mm2