公开(公告)号：US20170293470A1

公开(公告)日：2017-10-12

申请号：US15092401

申请日：2016-04-06

Applicant: Apple Inc.

Inventor： Liang-Kai Wang ,  Terence M. Potter ,  Andrew M. Havlir ,  Yu Sun ,  Nicolas X. Pena ,  Xiao-Long Wu ,  Christopher A. Burns

IPC: G06F7/483

CPC classification number: G06F7/483 ,  G06F7/5443

Abstract: Techniques are disclosed relating to floating-point operations with down-conversion. In some embodiments, a floating-point unit is configured to perform fused multiply-addition operations based on first and second different instruction types. In some embodiments, the first instruction type specifies result in the first floating-point format and the second instruction type specifies fused multiply addition of input operands in the first floating-point format to generate a result in a second, lower-precision floating-point format. For example, the first format may be a 32-bit format and the second format may be a 16-bit format. In some embodiments, the floating-point unit includes rounding circuitry, exponent circuitry, and/or increment circuitry configured to generate signals for the second instruction type in the same pipeline stage as for the first instruction type. In some embodiments, disclosed techniques may reduce the number of pipeline stages included in the floating-point circuitry.

公开(公告)号：US11166215B2

公开(公告)日：2021-11-02

申请号：US16882085

申请日：2020-05-22

Applicant: Apple Inc.

Inventor： Xiao Nie ,  Ruirui Zong ,  Yaoqi Yan ,  Tao Xie ,  Shangfeng Li ,  Yu Sun ,  Ye Dai ,  Ying Zhang

IPC: H04W4/00 ,  H04W36/14 ,  H04W36/32 ,  H04W36/30 ,  H04W88/10

Abstract: This disclosure relates to techniques for a wireless device to detect and operate in an elevator or elevator-like conditions. The wireless device may establish a cellular link with a cellular base station. One or more conditions associated with being in an elevator may be detected. The wireless device may determine to operate in an elevator mode based at least in part on detecting the one or more conditions associated with being in an elevator. The wireless device may operate in the elevator mode. One or more conditions associated with exiting an elevator may be detected. The wireless device may determine to operate in a normal mode based at least in part on detecting the one or more conditions associated with exiting an elevator. The wireless device may operate in the normal mode.

公开(公告)号：US10481869B1

公开(公告)日：2019-11-19

申请号：US15809648

申请日：2017-11-10

Applicant: Apple Inc.

Inventor： Liang-Kai Wang ,  Ting Yu ,  Yu Sun

IPC: G06F7/485 ,  G06F9/30 ,  G06F9/38 ,  G06F7/487

Abstract: Techniques are disclosed relating to circuitry configured to perform floating-point operations such as fused multiply-addition (FMA) with multiple paths and power control. In some embodiments, an FMA unit includes a near path and multiple far paths and is configured to select a path based on a determined exponent difference. In some embodiments, the FMA unit is configured to operate portions of non-selected paths in a low power state.

公开(公告)号：US20200383024A1

公开(公告)日：2020-12-03

申请号：US16882085

申请日：2020-05-22

Applicant: Apple Inc.

Inventor： Xiao Nie ,  Ruirui Zong ,  Yaoqi Yan ,  Tao Xie ,  Shangfeng Li ,  Yu Sun ,  Ye Dai ,  Ying Zhang

IPC: H04W36/14 ,  H04W36/30 ,  H04W36/32

Abstract: This disclosure relates to techniques for a wireless device to detect and operate in an elevator or elevator-like conditions. The wireless device may establish a cellular link with a cellular base station. One or more conditions associated with being in an elevator may be detected. The wireless device may determine to operate in an elevator mode based at least in part on detecting the one or more conditions associated with being in an elevator. The wireless device may operate in the elevator mode. One or more conditions associated with exiting an elevator may be detected. The wireless device may determine to operate in a normal mode based at least in part on detecting the one or more conditions associated with exiting an elevator. The wireless device may operate in the normal mode.

公开(公告)号：US10282169B2

公开(公告)日：2019-05-07

申请号：US15092401

申请日：2016-04-06

Applicant: Apple Inc.

Inventor： Liang-Kai Wang ,  Terence M. Potter ,  Andrew M. Havlir ,  Yu Sun ,  Nicolas X. Pena ,  Xiao-Long Wu ,  Christopher A. Burns

IPC: G06F7/483 ,  G06F7/544

Abstract: Techniques are disclosed relating to floating-point operations with down-conversion. In some embodiments, a floating-point unit is configured to perform fused multiply-addition operations based on first and second different instruction types. In some embodiments, the first instruction type specifies result in the first floating-point format and the second instruction type specifies fused multiply addition of input operands in the first floating-point format to generate a result in a second, lower-precision floating-point format. For example, the first format may be a 32-bit format and the second format may be a 16-bit format. In some embodiments, the floating-point unit includes rounding circuitry, exponent circuitry, and/or increment circuitry configured to generate signals for the second instruction type in the same pipeline stage as for the first instruction type. In some embodiments, disclosed techniques may reduce the number of pipeline stages included in the floating-point circuitry.