[all-commits] [llvm/llvm-project] cc65ec: [libc] fix strtofloat on large exponents

[michaelrj-google via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cc65ecfd08fbcd1dbfa21532830877460432b4da
      https://github.com/llvm/llvm-project/commit/cc65ecfd08fbcd1dbfa21532830877460432b4da
  Author: Michael Jones <michaelrj at google.com>
  Date:   2023-04-05 (Wed, 05 Apr 2023)

  Changed paths:
    M libc/src/__support/str_to_float.h
    M libc/test/src/stdlib/strtod_test.cpp

  Log Message:
  -----------
  [libc] fix strtofloat on large exponents

Previously if you specified an exponent of more than 10000 in string to
float (e.g. "1e10001") it would treat it as 10000. A bug was discovered
where by having more than 10000 zeroes after a decimal point and an
exponent of more than 10000 this would cause the code to return the
incorrect value.

Reviewed By: lntue

Differential Revision: https://reviews.llvm.org/D147474