or

Parameter	Description
input ports	2 input port(s) declared.

Parameter	Description
output ports	1 output port(s) declared.

📄Description

Outputs the logical OR of two inputs.

Module	`nflow_blocks`
Library	Logic blocks
Type	`or`
Label	OR

Description

Logical OR block. Returns 1.0 when any input is non-zero, otherwise 0.0.

Ports

Input(s)

Port	Role	Side	Position
Port_1	Numeric signal read by the block.	left	x=0, y=20
Port_2	Numeric signal read by the block.	left	x=0, y=60

Output(s)

Port	Role	Side	Position
Port_1	Numeric signal produced by the block.	right	x=80, y=40

Parameters

No block parameters are declared in the manifest.

Block Characteristics

Block type	or
Family	Logic blocks
Rendered size	80 x 80
Phases	ALGEBRAIC
Direct feedthrough	yes
Internal state or history	not observed in the documented runtime
Signal data type	double numeric values

Algorithms

Algebraic boolean block.
The output is true when at least one input is true.

Equation or Rule

$$y = \operatorname{bool}(u_1) \lor \operatorname{bool}(u_2)$$

Extended Capabilities

This page describes the native runtime behavior observed in the module C++ sources. Declared phases indicate when the simulation engine calls the block.

Code generation: supported for C and Rust.

Implementation Sources

Manifestmodules/nflow_blocks/libraries/logic/library.json

{
  "id": "builtin.logic",
  "title": "Logic / Bit Operations",
  "version": "0.1.0",
  "format": "nflow-2",
  "builtin": true,
  "blocks": [
    {
      "type": "and",
      "label": "AND",
      "icon": "and.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 80,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 20,
          "side": "left"
        },
        {
          "x": 0,
          "y": 60,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 80,
          "y": 40,
          "side": "right"
        }
      ],
      "render": {
        "type": "math",
        "bodyClass": "block-body",
        "mathGroupClass": "and-math",
        "formula": "\\text{AND}",
        "textSize": "16px"
      }
    },
    {
      "type": "or",
      "label": "OR",
      "icon": "or.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 80,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 20,
          "side": "left"
        },
        {
          "x": 0,
          "y": 60,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 80,
          "y": 40,
          "side": "right"
        }
      ],
      "render": {
        "type": "math",
        "bodyClass": "block-body",
        "mathGroupClass": "or-math",
        "formula": "\\text{OR}",
        "textSize": "16px"
      }
    },
    {
      "type": "xor",
      "label": "XOR",
      "icon": "xor.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 80,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 20,
          "side": "left"
        },
        {
          "x": 0,
          "y": 60,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 80,
          "y": 40,
          "side": "right"
        }
      ],
      "render": {
        "type": "math",
        "bodyClass": "block-body",
        "mathGroupClass": "xor-math",
        "formula": "\\text{XOR}",
        "textSize": "16px"
      }
    },
    {
      "type": "not",
      "label": "NOT",
      "icon": "not.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 80,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 80,
          "y": 40,
          "side": "right"
        }
      ],
      "render": {
        "type": "math",
        "bodyClass": "block-body",
        "mathGroupClass": "not-math",
        "formula": "\\text{NOT}",
        "textSize": "16px"
      }
    },
    {
      "type": "compareToConstant",
      "label": "Compare Const",
      "icon": "compareToConstant.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 100,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 100,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "relop": "ge",
        "const": 0
      },
      "render": {
        "type": "image",
        "src": "exports/compareToConstant.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 100,
        "height": 80
      }
    },
    {
      "type": "intervalTest",
      "label": "Interval Test",
      "icon": "intervalTest.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 100,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 100,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "LowerLimit": 0,
        "UpperLimit": 1,
        "IntervalClosedLeft": 1,
        "IntervalClosedRight": 1
      },
      "render": {
        "type": "image",
        "src": "exports/intervalTest.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 100,
        "height": 80
      }
    },
    {
      "type": "intervalTestDynamic",
      "label": "Interval Test Dynamic",
      "icon": "intervalTestDynamic.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 100,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 20,
          "side": "left"
        },
        {
          "x": 0,
          "y": 40,
          "side": "left"
        },
        {
          "x": 0,
          "y": 60,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 100,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "IntervalClosedLeft": 1,
        "IntervalClosedRight": 1
      },
      "render": {
        "type": "image",
        "src": "exports/intervalTestDynamic.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 100,
        "height": 80
      }
    },
    {
      "type": "bitwiseOperator",
      "label": "Bitwise Operator",
      "icon": "bitwiseOperator.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 90,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 90,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "Operation": "AND",
        "BitMask": 0,
        "NumBits": 32
      },
      "render": {
        "type": "image",
        "src": "exports/bitwiseOperator.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 90,
        "height": 80
      }
    },
    {
      "type": "bitSet",
      "label": "Bit Set",
      "icon": "bitSet.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 80,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 80,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "BitIndex": 0,
        "NumBits": 32
      },
      "render": {
        "type": "image",
        "src": "exports/bitSet.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 80,
        "height": 80
      }
    },
    {
      "type": "bitClear",
      "label": "Bit Clear",
      "icon": "bitClear.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 80,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 80,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "BitIndex": 0,
        "NumBits": 32
      },
      "render": {
        "type": "image",
        "src": "exports/bitClear.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 80,
        "height": 80
      }
    },
    {
      "type": "extractBits",
      "label": "Extract Bits",
      "icon": "extractBits.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 90,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 90,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "StartBit": 0,
        "NumBitsToExtract": 8,
        "NumBits": 32,
        "OutputScaling": "keepWeight"
      },
      "render": {
        "type": "image",
        "src": "exports/extractBits.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 90,
        "height": 80
      }
    },
    {
      "type": "shiftArithmetic",
      "label": "Shift Arithmetic",
      "icon": "shiftArithmetic.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 90,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 90,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "ShiftDirection": "Left",
        "ShiftNumber": 1
      },
      "render": {
        "type": "image",
        "src": "exports/shiftArithmetic.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 90,
        "height": 80
      }
    },
    {
      "type": "combinatorialLogic",
      "label": "Combinatorial Logic",
      "icon": "combinatorialLogic.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 90,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 90,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "TruthTable": [
          0,
          1,
          1,
          0
        ]
      },
      "render": {
        "type": "image",
        "src": "exports/combinatorialLogic.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 90,
        "height": 80
      }
    },
    {
      "type": "compareToZero",
      "label": "Compare Zero",
      "icon": "compareToZero.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 100,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 100,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "relop": "ne"
      },
      "render": {
        "type": "image",
        "src": "exports/compareToZero.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 100,
        "height": 80
      }
    },
    {
      "type": "relationalOperator",
      "label": "Relational",
      "icon": "relationalOperator.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 100,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 30,
          "side": "left"
        },
        {
          "x": 0,
          "y": 50,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 100,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "Operator": "ge"
      },
      "render": {
        "type": "image",
        "src": "exports/relationalOperator.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 100,
        "height": 80
      }
    },
    {
      "type": "switchCase",
      "label": "Switch Case",
      "icon": "switchCase.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 100,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 40,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 100,
          "y": 30,
          "side": "right"
        },
        {
          "x": 100,
          "y": 50,
          "side": "right"
        }
      ],
      "defaultParams": {
        "CaseConditions": "{1}",
        "ShowDefaultCase": "on"
      },
      "render": {
        "type": "image",
        "src": "exports/switchCase.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 100,
        "height": 80
      }
    },
    {
      "type": "if",
      "label": "If",
      "icon": "if.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 100,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 30,
          "side": "left"
        },
        {
          "x": 0,
          "y": 50,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 100,
          "y": 30,
          "side": "right"
        },
        {
          "x": 100,
          "y": 50,
          "side": "right"
        }
      ],
      "defaultParams": {
        "IfExpression": "u1 > 0",
        "ElseIfExpressions": "",
        "ShowElse": "on"
      },
      "render": {
        "type": "image",
        "src": "exports/if.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 100,
        "height": 80
      }
    },
    {
      "type": "logicalOperator",
      "label": "Logical Operator",
      "icon": "logicalOperator.svg",
      "phases": [
        "ALGEBRAIC"
      ],
      "width": 80,
      "height": 80,
      "inputs": [
        {
          "x": 0,
          "y": 30,
          "side": "left"
        },
        {
          "x": 0,
          "y": 50,
          "side": "left"
        }
      ],
      "outputs": [
        {
          "x": 80,
          "y": 40,
          "side": "right"
        }
      ],
      "defaultParams": {
        "Operator": "AND"
      },
      "render": {
        "type": "image",
        "src": "exports/logicalOperator.svg",
        "svgMode": "element",
        "preserveAspectRatio": "none",
        "x": 0,
        "y": 0,
        "width": 80,
        "height": 80
      }
    }
  ]
}

Runtimemodules/nflow_blocks/src/cpp/logic/or.cpp

//=============================================================================
// Copyright (c) 2016-present Allan CORNET (Nelson)
//=============================================================================
// This file is part of Nelson.
//=============================================================================
// LICENCE_BLOCK_BEGIN
// SPDX-License-Identifier: LGPL-3.0-or-later
// LICENCE_BLOCK_END
//=============================================================================
#include "SimEngineTypes.hpp"
#include "BlockRegistry.hpp"
#include "FieldNames.hpp"
#include "NFlowBlockDescriptor.hpp"
#include <cstdint>
#include <cmath>
#include "logic_blocks.hpp"
//=============================================================================
bool
Nelson::NFlow::handleOr(SimCtx& ctx, const Block& b, Phase phase)
{
    if (phase != Phase::ALGEBRAIC) {
        return false;
    }
    int n = numInputs(ctx, b.nid);
    std::vector<SigView> ins(n);
    for (int i = 0; i < n; ++i) {
        ins[i] = getInputSig(ctx, b.nid, i);
    }
    return emitElementwise(ctx, b.nid, [&](int k) {
        for (int i = 0; i < n; ++i) {
            double v = sigAt(ins[i], k);
            if (!std::isnan(v) && v != 0.0) {
                return 1.0;
            }
        }
        return 0.0;
    });
}
//=============================================================================
Nelson::NFlow::BlockCodegenTemplate
Nelson::NFlow::getCodeGenCOr()
{
    BlockCodegenTemplate t;
    t.step = "out_{id} = (({in0} != 0.0) || ({in1} != 0.0)) ? 1.0 : 0.0;";
    return t;
}
//=============================================================================
Nelson::NFlow::BlockCodegenTemplate
Nelson::NFlow::getCodeGenRustOr()
{
    BlockCodegenTemplate t;
    t.step = "out_{id} = if {in0} != 0.0_f64 || {in1} != 0.0_f64 { 1.0_f64 } else { 0.0_f64 };";
    return t;
}
//=============================================================================