公开(公告)号：US10514891B1

公开(公告)日：2019-12-24

申请号：US16435075

申请日：2019-06-07

Applicant: Google LLC

Inventor： Hsin-Jung Yang ,  Andrew Everett Phelps

IPC: G06F7/485 ,  G06F7/499 ,  G06F9/30

Abstract: Methods, systems, and apparatus, including an apparatus for adding three or more floating-point numbers. In one aspect, a method includes receiving, for each of three or more operands, a set of bits that include a floating-point representation of the operand. A given operand is identified. For each other operand, the mantissa bits of the operand are shifted such that the bits of the operand align with the bits of the given operand. A sticky bit for each other operand is determined. An overall sticky bit value is determined based on each sticky bit. The overall sticky bit value is zero whenever all of the sticky bits are zero or at least two sticky bits are non-zero and do not match. The overall sticky bit value matches the value of each non-zero sticky bit whenever all of the non-zero sticky bits match or there is only one non-zero sticky bit.

公开(公告)号：US20200371748A1

公开(公告)日：2020-11-26

申请号：US16719954

申请日：2019-12-18

Applicant: Google LLC

Inventor： Hsin-Jung Yang ,  Andrew Everett Phelps

IPC: G06F7/499 ,  G06F7/485 ,  G06F9/30

Abstract: Methods, systems, and apparatus, including an apparatus for adding three or more floating-point numbers. In one aspect, a method includes receiving, for each of three or more operands, a set of bits that include a floating-point representation of the operand. A given operand is identified. For each other operand, the mantissa bits of the operand are shifted such that the bits of the operand align with the bits of the given operand. A sticky bit for each other operand is determined. An overall sticky bit value is determined based on each sticky bit. The overall sticky bit value is zero whenever all of the sticky bits are zero or at least two sticky bits are non-zero and do not match. The overall sticky bit value matches the value of each non-zero sticky bit whenever all of the non-zero sticky bits match or there is only one non-zero sticky bit.