[llvm-bugs] [Bug 43896] New: Implement ISO/IEC JTC1 SC22 WG14 N1169 fixed-point types and arithmetic

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https://bugs.llvm.org/show_bug.cgi?id=43896

            Bug ID: 43896
           Summary: Implement ISO/IEC JTC1 SC22 WG14 N1169 fixed-point
                    types and arithmetic
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: bevin.hansson at ericsson.com
                CC: llvm-bugs at lists.llvm.org, neeilans at live.com,
                    richard-llvm at metafoo.co.uk

This is a ticket to track the remaining work required for supporting the
ISO/IEC JTC1 SC22 WG14 N1169 fixed-point types and arithmetic.

Although this ticket is filed under Clang Frontend, the remaining work also
includes patches to LLVM and other parts of Clang.

The currently estimated work that remains is:

LLVM:
* Intrinsic for fixed-point [saturating] division
* Possibly intrinsics for floating point/fixed-point conversion
* Possibly intrinsic for saturating left shift

Clang:
* Precision/limits macros (stdfix.h)
* Constant evaluation
** Subtraction
** Multiplication
** Division
** Shift
** Floating point conversion
* Compound assignment
* Codegen
** Multiplication
** Division
** Shift
** Unary operations
** Floating point conversion

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