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GNU C Library Sees Up to 12.9x Improvement with New Generic FMA Implementation

14 days ago
https://www.phoronix.com/news/Glibc-New-Generic-FMA
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  • #FMA
  • #GNU C Library
  • #performance
  • Adhemerval Zanella contributed a new generic FMA implementation to the GNU C Library.
  • The new implementation uses mostly integer arithmetic, avoiding the performance overhead of setting rounding modes.
  • Fixes include signaling NaN issues, use of math_uint128.h for 64-bit multiplication, and arm32 rounding mode fixes.
  • The implementation shows significant performance improvements, up to 12.9x in some cases.
  • Glibc 2.43 will include additional optimized math functions from the CORE-MATH project.
  • Optimized implementations for functions like remainder, frexpf, and others have been added.
  • SVID handling for various functions was moved to compat symbols, improving performance.
  • Glibc 2.43 is scheduled for release in February.
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