Commit Graph

7 Commits

Author SHA1 Message Date
Bevin Hansson c4944a6f53 [Fixed Point] Add codegen for conversion between fixed-point and floating point.
The patch adds the required methods to FixedPointBuilder
for converting between fixed-point and floating point,
and uses them from Clang.

This depends on D54749.

Reviewed By: leonardchan

Differential Revision: https://reviews.llvm.org/D86632
2021-01-12 13:53:01 +01:00
Bevin Hansson 9c26eb8b91 Refactor fixed point conversion test.
Differential Revision: https://reviews.llvm.org/D88648
2020-10-09 10:27:42 +02:00
Leonard Chan 8f7caae00a [Fixed Point Arithmetic] Fixed Point and Integer Conversions
This patch includes the necessary code for converting between a fixed point type and integer.
This also includes constant expression evaluation for conversions with these types.

Differential Revision: https://reviews.llvm.org/D56900

llvm-svn: 355462
2019-03-06 00:28:43 +00:00
Leonard Chan d3f3e16293 [Fixed Point Arithmetic] Fixed Point Addition Constant Expression Evaluation
This patch includes logic for constant expression evaluation of fixed point additions.

Differential Revision: https://reviews.llvm.org/D55868

llvm-svn: 351593
2019-01-18 21:04:25 +00:00
Leonard Chan 2044ac89aa [Fixed Point Arithmetic] Fixed Point Addition
This patch covers addition between fixed point types and other fixed point
types or integers, using the conversion rules described in 4.1.4 of N1169.

Usual arithmetic rules do not apply to binary operations when one of the
operands is a fixed point type, and the result of the operation must be
calculated with the full precision of the operands, so we should not perform
any casting to a common type.

This patch does not include constant expression evaluation for addition of
fixed point types. That will be addressed in another patch since I think this
one is already big enough.

Differential Revision: https://reviews.llvm.org/D53738

llvm-svn: 351364
2019-01-16 18:13:59 +00:00
Bjorn Pettersson b25340236c [Fixed Point Arithmetic] Refactor fixed point casts
Summary:
- Added names for some emitted values (such as "tobool" for
  the result of a cast to boolean).
- Replaced explicit IRBuilder request for doing sext/zext/trunc
  by using CreateIntCast instead.
- Simplify code for emitting satuation into one if-statement
  for clamping to max, and one if-statement for clamping to min.

Reviewers: leonardchan, ebevhan

Reviewed By: leonardchan

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D53707

llvm-svn: 345398
2018-10-26 16:12:12 +00:00
Leonard Chan 99bda375a1 [Fixed Point Arithmetic] FixedPointCast
This patch is a part of https://reviews.llvm.org/D48456 in an attempt to
split them up. This contains the code for casting between fixed point types
and other fixed point types.

The method for converting between fixed point types is based off the convert()
method in APFixedPoint.

Differential Revision: https://reviews.llvm.org/D50616

llvm-svn: 344530
2018-10-15 16:07:02 +00:00