mad.cc GPU Virtual ISA NVIDIA

mad.cc Extended-Precision Integer Arithmetic Instructions

mad{.hi,.lo}.cc.type d, a, b, c;

Multiplies two values, extracts either the high or low part of the result, and adds a third value.

Encoding

PTX is a virtual instruction set. It has no single, stable native binary encoding - the compiler lowers this instruction to different native machine code depending on the selected NVIDIA target architecture (compute capability). This page intentionally shows no bit-diagram; see the target/version requirements below for what governs how this instruction compiles.
PTX ISA Version Introduced PTX ISA 3.0
Minimum Target sm_10

Syntax Forms

One mnemonic covers many type / state-space / scope / modifier combinations - each row below is an independently valid form.

Syntax Data Types State Space(s) Modifiers Min. Target Description
mad{.hi,.lo}.cc.type d, a, b, c; sm_10 Multiplies two values, extracts either the high or low part of the result, and adds a third value. (see the official PTX ISA docs for the full description)

Operands

  • d
    Destination register
  • a
    Source operand
  • b
    Source operand
  • c
    Source operand

At a Glance

Data Types -

Related

More in Extended-Precision Integer Arithmetic Instructions

Reference

NVIDIA PTX ISA

Description

Multiplies two values, extracts either the high or low part of the result, and adds a third value. Writes the result to the destination register and the carry-out from the addition into the condition code register.

Semantics

t = a * b; d = t<63..32> + c; // for .hi variant d = t<31..0> + c; // for .lo variant

Examples

@p  mad.lo.cc.u32 d,a,b,c;
    mad.lo.cc.u32 r,p,q,r;

Reproduced from NVIDIA's official PTX ISA documentation for technical accuracy.

Sources