JP5069476B2 - プログラマブルロジックデバイスのための特殊処理ブロック - Google Patents
プログラマブルロジックデバイスのための特殊処理ブロック Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/499—Denomination or exception handling, e.g. rounding or overflow
- G06F7/49942—Significance control
- G06F7/49947—Rounding
- G06F7/49963—Rounding to nearest
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/499—Denomination or exception handling, e.g. rounding or overflow
- G06F7/49905—Exception handling
- G06F7/4991—Overflow or underflow
- G06F7/49921—Saturation, i.e. clipping the result to a minimum or maximum value
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/499—Denomination or exception handling, e.g. rounding or overflow
- G06F7/49942—Significance control
- G06F7/49947—Rounding
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
- G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
- G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
- G06F7/5443—Sum of products
Description
本出願は、同時係属の共有に係る米国仮出願番号第60/771,989号(2006年2月9日出願)の利益を主張し、その全体において、本明細書において参照により援用される。
(項目1)
プログラマブルロジックデバイスのための特殊処理ブロックであって、該特殊処理ブロックは、
結果を出力するために、入力の積および該積の和を提供するための算術回路網と、
該結果を、(a)直近の整数、および(b)直近の偶数のうちの一つに、選択可能なように丸めるための丸め回路網と
を備える、特殊処理ブロック。
(項目2)
上記丸め回路網は、上記結果の選択可能なビット位置において上記丸めることを実行する、項目1に記載の特殊処理ブロック。
(項目3)
上記算術回路網は、最も高い正の値にまで延びている範囲および最も高い負の値にまで延びている範囲内の値において演算し、該特殊処理ブロックは、上記結果を該範囲内の値にクリッピングする飽和回路網をさらに備える、項目1に記載の特殊処理ブロック。
(項目4)
上記飽和回路網は、上記結果の選択可能なビット位置にて上記クリッピングすることを実行する、項目3に記載の特殊処理ブロック。
(項目5)
上記飽和回路網は上記結果を対称的にクリッピングする、項目3に記載の特殊処理ブロック。
(項目6)
上記飽和回路網は上記結果を非対称的にクリッピングする、項目3に記載の特殊処理ブロック。
(項目7)
上記飽和回路網は、上記丸め回路網の後に演算する、項目3に記載の特殊処理ブロック。
(項目8)
上記丸め回路網は、上記特殊処理ブロックの演算を最適化するために、プログラム可能なように位置され得る、項目1に記載の特殊処理ブロック。
(項目9)
上記丸め回路網の少なくとも第1の部分は、ルックアヘッドモードにて演算をするために、上記算術回路網の少なくとも一部と並列に、プログラム可能なように位置され得る、項目8に記載の特殊処理ブロック。
(項目10)
上記算術回路網の上記部分は丸め無しの上記結果を計算し、
上記丸め回路網の上記第1の部分は、丸めと、丸め無しに該結果の該算術回路網の該部分による計算とを並列に用いた該結果を計算し、
該丸め回路網は、丸めを用いた該結果と丸め無しの結果との間において選択する第2の部分をさらに備える、
項目9に記載の特殊処理ブロック。
(項目11)
上記算術回路網は、臨界タイミング経路を作成するレジスタを含み、
上記丸め回路網は、該臨界タイミング経路にプログラム可能なように含まれ得、および該臨界タイミング経路から排除され得るように、該レジスタの(a)前、および(b)後のうちの少なくとも一つである少なくとも一つの位置にプログラム可能なように位置可能である、
項目8に記載の特殊処理ブロック。
(項目12)
上記臨界タイミング経路は、別の上記特殊処理ブロックから結合された結果を含む、項目11に記載の特殊処理ブロック。
(項目13)
項目1に記載の特殊処理ブロックを備える、プログラマブルロジックデバイス。
(項目14)
処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている項目13に記載のプログラマブルロジックデバイスと
を備える、デジタル処理システム。
(項目15)
項目13に記載のプログラマブルロジックデバイスを実装したプリント回路基板。
(項目16)
上記プリント回路基板に実装され、上記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに備える、項目15に記載のプリント回路基板。
(項目17)
上記プリント回路基板に実装され、上記メモリ回路網に結合されている処理回路網をさらに備える、項目16に記載のプリント回路基板。
(項目18)
項目1に記載の特殊処理ブロックを備える、集積回路デバイス。
(項目19)
処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている項目18に記載の集積回路デバイスと
を備える、デジタル処理システム。
(項目20)
項目19に記載の集積回路デバイスを実装したプリント回路基板。
(項目21)
上記プリント回路基板に実装され、上記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに備える、項目20に記載のプリント回路基板。
(項目22)
上記プリント回路基板に実装され、上記メモリ回路網に結合されている処理回路網をさらに備える、項目21に記載のプリント回路基板。
(項目23)
プログラマブルロジックデバイスのための特殊処理ブロックであって、該特殊処理ブロックは、
結果を出力するために、入力の積および該積の和を提供するための算術回路網と、
該結果を、(a)直近の整数、および(b)直近の偶数のうちの一つに、選択可能なように丸めるための丸め回路網と
を備える、特殊処理ブロック。
(項目24)
上記算術回路網は、最も高い正の値にまで延びている範囲および最も高い負の値にまで延びている範囲内の値において演算し、該特殊処理ブロックは、上記結果を該範囲内の値にクリッピングする飽和回路網をさらに備える、項目23に記載の特殊処理ブロック。
(項目25)
上記飽和回路網は、上記結果の選択可能なビット位置にて上記クリッピングすることを実行する、項目24に記載の特殊処理ブロック。
(項目26)
上記飽和回路網は上記結果を対称的にクリッピングする、項目24に記載の特殊処理ブロック。
(項目27)
上記飽和回路網は上記結果を非対称的にクリッピングする、項目24に記載の特殊処理ブロック。
(項目28)
項目23に記載の特殊処理ブロックを備える、プログラマブルロジックデバイス。
(項目29)
処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている項目28に記載のプログラマブルロジックデバイスと
を備える、デジタル処理システム。
(項目30)
項目28に記載のプログラマブルロジックデバイスを実装したプリント回路基板。
(項目31)
上記プリント回路基板に実装され、上記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに備える、項目30に記載のプリント回路基板。
(項目32)
上記プリント回路基板に実装され、上記メモリ回路網に結合されている処理回路網をさらに備える、項目31に記載のプリント回路基板。
(項目33)
項目23に記載の特殊処理ブロックを備える、集積回路デバイス。
(項目34)
処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている項目33に記載の集積回路デバイスと
を備える、デジタル処理システム。
(項目35)
項目34に記載の集積回路デバイスを実装したプリント回路基板。
(項目36)
上記プリント回路基板に実装され、上記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに備える、項目35に記載のプリント回路基板。
(項目37)
上記プリント回路基板に実装され、上記メモリ回路網に結合されている処理回路網をさらに備える、項目36に記載のプリント回路基板。
プログラマブルロジックデバイスのための特殊処理ブロックは、乗算およびその和を実行する回路網、およびその結果を丸める回路網を含む。丸め回路網は、直近への丸めおよび直近への丸め−偶数の演算を選択可能なように実行する。さらに、丸めが生じるビット位置は好適に選択可能である。特殊処理ブロックはまた、好適には、オーバーフローおよびアンダーフローを防ぐために飽和回路を含み、飽和が生じるビット位置もまた好適に選択可能である。丸め位置および飽和位置の両方の選択可能性は、出力データワード幅の制御を提供する。丸めおよび飽和回路網は、タイミングの必要性に基づき、異なる位置において選択可能なように位置され得る。同様に、丸めは、丸めの結果および丸め無しの結果の両方が、これらの結果の間において選択する丸めロジックを用いて並列に計算される、ルックアヘッドモードを用いることによって加速され得る。
対称飽和:Max=0x7FFF、Min=0x8001
ここにおいて、本発明は、図1〜11を参照して説明される。
虚数結果=Im[(a+jb)×(c+jd)]=(ad+bc)
この複素演算は4つの18×18乗算、従って、8つの18ビット入力を必要とする。しかしながら、4つの一意の18ビット共有入力のみしかないため、入力マルチプレクシング段13は、入力a、b、cおよびdをとり、それらの4つの入力が実数および虚数の計算の各々のために正確な乗算器に適切にルートされるように必要な複製を実行する。同様に、9および12ビットモード演算に対しては、入力プレMUX段11および/または入力マルチプレクシング段13は、正確な結果を得るために入力ビットの正確な整列を保証する。
分の1であるか否かに関らず結果は切り上げられる必要があり、よって625にてRNDSELは1に設定される。
11 プレMUX
12 I/P レジスタ段
13 I/P MUX
14 段乗算
15 パイプラインレジスタ段
30 基本処理ユニット
50 FIRフィルタ
Claims (36)
- プログラマブルロジックデバイスのための特殊処理ブロックであって、該特殊処理ブロックは、
入力の積および該積の和を提供することにより、結果を出力するための算術回路網
を含み、
該算術回路網は、複数の基本処理ユニットを含み、該複数の基本処理ユニットの各々は、
複数の部分的積生成器であって、該複数の部分的積生成器のうちのそれぞれ1つは、該複数の部分的積生成器のうちの他のそれぞれの入力とは異なるそれぞれ一対の入力を有し、それぞれの部分的積を表すそれぞれの複数のベクトルを提供する、複数の部分的積生成器と、
それぞれの複数のベクトルの各々を、該それぞれの部分的積を表すより少ない数のベクトルに圧縮するための圧縮器回路網と、
該複数の部分的積生成器の全てによって生成された該より少ない数のベクトルによって表された部分的積を、一演算において、加算するための回路網と
を含み、
該加算するための回路網は、該複数の部分的積生成器の全ての部分的積の全ての合計のみを出力し、
該それぞれの部分的積の各々は、該特殊処理ブロックの出力に送られることが不可能であり、これにより、該加算するための回路網によって該それぞれの部分的積の各々が該それぞれの部分的積のうちの他のものに加算された後を除いて、該それぞれの部分的積の各々は、出力のために利用することが不可能であり、
該特殊処理ブロックは、
該結果を(a)直近の整数、および、(b)直近の偶数のうちの一つに選択可能に丸めるための丸め回路網をさらに含む、特殊処理ブロック。 - 前記丸め回路網は、前記結果の選択可能なビット位置において前記丸めることを実行する、請求項1に記載の特殊処理ブロック。
- 前記算術回路網は、最大で最も大きい正の値にまで及び、かつ、最小で最も小さい負の値にまで及ぶ範囲内の値において演算し、前記特殊処理ブロックは、前記結果を該範囲内の値にクリッピングするための飽和回路網をさらに含む、請求項1に記載の特殊処理ブロック。
- 前記飽和回路網は、前記結果の選択可能なビット位置において前記クリッピングすることを実行する、請求項3に記載の特殊処理ブロック。
- 前記飽和回路網は、前記結果を対称的にクリッピングする、請求項3に記載の特殊処理ブロック。
- 前記飽和回路網は、前記結果を非対称的にクリッピングする、請求項3に記載の特殊処理ブロック。
- 前記飽和回路網は、前記丸め回路網の後に演算する、請求項3に記載の特殊処理ブロック。
- 前記丸め回路網は、前記特殊処理ブロックの演算を最適化するように、プログラム可能に位置付けすることが可能である、請求項1に記載の特殊処理ブロック。
- 前記丸め回路網の少なくとも第1の部分は、ルックアヘッドモードにおいて演算するように、前記算術回路網の少なくとも一部分と並列に、プログラム可能に位置付けすることが可能である、請求項8に記載の特殊処理ブロック。
- 前記算術回路網の前記一部分は、丸め無しで前記結果を計算し、
前記丸め回路網の前記第1の部分は、該算術回路網の該一部分による丸め無しの該結果の計算と並列して、丸めを用いて該結果を計算し、
該丸め回路網は、丸めを用いた該結果と丸め無しの該結果との間で選択する第2の部分をさらに含む、請求項9に記載の特殊処理ブロック。 - 前記算術回路網は、臨界タイミング経路を作成するレジスタを含み、
前記丸め回路網は、該臨界タイミング経路にプログラム可能に含まれること、および、該臨界タイミング経路からプログラム可能に排除されることが可能なように、該レジスタの(a)前、および、(b)後のうちの少なくとも一つである少なくとも一つの位置にプログラム可能に位置付けすることが可能である、請求項8に記載の特殊処理ブロック。 - 前記臨界タイミング経路は、別の前記特殊処理ブロックからチェーン状に結合された結果を含む、請求項11に記載の特殊処理ブロック。
- 請求項1に記載の特殊処理ブロックを含む、プログラマブルロジックデバイス。
- 処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている請求項13に記載のプログラマブルロジックデバイスと
を含む、デジタル処理システム。 - 請求項13に記載のプログラマブルロジックデバイスを実装したプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに含む、請求項15に記載のプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記メモリ回路網に結合されている処理回路網をさらに含む、請求項16に記載のプリント回路基板。
- 請求項1に記載の特殊処理ブロックを含む、集積回路デバイス。
- 処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている請求項18に記載の集積回路デバイスと
を含む、デジタル処理システム。 - 請求項19に記載の集積回路デバイスを実装したプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに含む、請求項20に記載のプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記メモリ回路網に結合されている処理回路網をさらに含む、請求項21に記載のプリント回路基板。
- プログラマブルロジックデバイスのための特殊処理ブロックであって、該特殊処理ブロックは、
入力の積および該積の和を提供することにより、結果を出力するための算術回路網であって、該算術回路網は、最大で最も大きい正の値にまで及び、かつ、最小で最も小さい負の値にまで及ぶ範囲内の値において演算する、算術回路網
を含み、
該算術回路網は、複数の基本処理ユニットを含み、該複数の基本処理ユニットの各々は、
複数の部分的積生成器であって、該複数の部分的積生成器のうちのそれぞれ1つは、該複数の部分的積生成器のうちの他のそれぞれの入力とは異なるそれぞれ一対の入力を有し、それぞれの部分的積を表すそれぞれの複数のベクトルを提供する、複数の部分的積生成器と、
それぞれの複数のベクトルの各々を、該それぞれの部分的積を表すより少ない数のベクトルに圧縮するための圧縮器回路網と、
該複数の部分的積生成器の全てによって生成された該より少ない数のベクトルによって表された部分的積を、一演算において、加算するための回路網と
を含み、
該加算するための回路網は、該複数の部分的積生成器の全ての部分的積の全ての合計のみを出力し、
該それぞれの部分的積の各々は、該特殊処理ブロックの出力に送られることが不可能であり、これにより、該加算するための回路網によって該それぞれの部分的積の各々が該それぞれの部分的積のうちの他のものに加算された後を除いて、該それぞれの部分的積の各々は、出力するために利用することが不可能であり、
該特殊処理ブロックは、
該結果を該範囲内の値にクリッピングするための飽和回路網をさらに含む、特殊処理ブロック。 - 前記飽和回路網は、前記結果の選択可能なビット位置において前記クリッピングすることを実行する、請求項23に記載の特殊処理ブロック。
- 前記飽和回路網は、前記結果を対称的にクリッピングする、請求項23に記載の特殊処理ブロック。
- 前記飽和回路網は、前記結果を非対称的にクリッピングする、請求項23に記載の特殊処理ブロック。
- 請求項23に記載の特殊処理ブロックを含む、プログラマブルロジックデバイス。
- 処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている請求項27に記載のプログラマブルロジックデバイスと
を含む、デジタル処理システム。 - 請求項27に記載のプログラマブルロジックデバイスを実装したプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに含む、請求項29に記載のプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記メモリ回路網に結合されている処理回路網をさらに含む、請求項30に記載のプリント回路基板。
- 請求項23に記載の特殊処理ブロックを含む、集積回路デバイス。
- 処理回路網と、
該処理回路網に結合されているメモリと、
該処理回路網および該メモリに結合されている請求項32に記載の集積回路デバイスと
を含む、デジタル処理システム。 - 請求項33に記載の集積回路デバイスを実装したプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記プログラマブルロジックデバイスに結合されているメモリ回路網をさらに含む、請求項34に記載のプリント回路基板。
- 前記プリント回路基板に実装され、かつ、前記メモリ回路網に結合されている処理回路網をさらに含む、請求項35に記載のプリント回路基板。
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2006
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US20070185951A1 (en) | 2007-08-09 |
CN101042583B (zh) | 2011-03-02 |
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EP1830252A3 (en) | 2009-02-04 |
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