[all-commits] [llvm/llvm-project] 173d50: [libc] add printf auto float conversion

[michaelrj-google via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 173d50235fa3c5b028fa3c8efa5beec56b752e75
      https://github.com/llvm/llvm-project/commit/173d50235fa3c5b028fa3c8efa5beec56b752e75
  Author: Michael Jones <michaelrj at google.com>
  Date:   2023-02-03 (Fri, 03 Feb 2023)

  Changed paths:
    M libc/src/__support/float_to_string.h
    M libc/src/stdio/printf_core/converter.cpp
    M libc/src/stdio/printf_core/converter_atlas.h
    M libc/src/stdio/printf_core/float_dec_converter.h
    M libc/test/src/stdio/sprintf_test.cpp

  Log Message:
  -----------
  [libc] add printf auto float conversion

This patch adds the final conversion to printf, %g. This is a floating
point conversion that selects automatically between the %e and %f
formats based on the precision requested and resulting exponent.
Additionally it trims trailing zeroes. With this done all that's left
for finishing printf is adding long double support to the decimal float
conversions.

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D143006