Itanium® Architecture for Programmers: Understanding 64-Bit Processors and EPIC Principles

12.5. Floating-Point Parallel Operations

When we first introduced floating-point instructions, we correlated them with their apparent integer equivalents. Similarly, we now introduce the Itanium floating-point parallel operations by analogy to operations on full-width data.

Table 12-3 lists the Itanium instructions that perform operations on two single-precision floating-point values packed in the 82-bit floating-point registers. Analogies are drawn to instructions that operate with double-precision data where appropriate.

Table 12-3. Itanium Floating-Point Parallel Instructions

Instruction Name	Opcode(s)	Analogy
Convert Parallel Floating-Point to Integer	fpcvt.fx, fpcvt.fxu	fcvt.fx, fcvt.fxu
Floating-Point Mix	fmix
Floating-Point Pack	fpack
Floating-Point ...