1. 09 9月, 2020 1 次提交
  2. 17 8月, 2020 1 次提交
  3. 03 4月, 2018 1 次提交
    • S
      fix fmaf wrong result · 282b1cd2
      Szabolcs Nagy 提交于
      if double precision r=x*y+z is not a half way case between two single
      precision floats or it is an exact result then fmaf returns (float)r.
      
      however the exactness check was wrong when |x*y| < |z| and could cause
      incorrectly rounded result in nearest rounding mode when r is a half
      way case.
      
      fmaf(-0x1.26524ep-54, -0x1.cb7868p+11, 0x1.d10f5ep-29)
      was incorrectly rounded up to 0x1.d117ap-29 instead of 0x1.d1179ep-29.
      (exact result is 0x1.d1179efffffffecp-29, r is 0x1.d1179fp-29)
      282b1cd2
  4. 08 10月, 2013 1 次提交
  5. 19 5月, 2013 1 次提交
    • S
      math: add fma TODO comments about the underflow issue · 1e5eb735
      Szabolcs Nagy 提交于
      The underflow exception is not raised correctly in some
      cornercases (see previous fma commit), added comments
      with examples for fmaf, fmal and non-x86 fma.
      
      In fmaf store the result before returning so it has the
      correct precision when FLT_EVAL_METHOD!=0
      1e5eb735
  6. 13 11月, 2012 1 次提交
  7. 17 3月, 2012 1 次提交
    • R
      make fma and lrint functions build without full fenv support · 2e77dc13
      Rich Felker 提交于
      this is necessary to support archs where fenv is incomplete or
      unavailable (presently arm). fma, fmal, and the lrint family should
      work perfectly fine with this change; fmaf is slightly broken with
      respect to rounding as it depends on non-default rounding modes to do
      its work.
      2e77dc13
  8. 13 3月, 2012 1 次提交
    • R
      first commit of the new libm! · b69f695a
      Rich Felker 提交于
      thanks to the hard work of Szabolcs Nagy (nsz), identifying the best
      (from correctness and license standpoint) implementations from freebsd
      and openbsd and cleaning them up! musl should now fully support c99
      float and long double math functions, and has near-complete complex
      math support. tgmath should also work (fully on gcc-compatible
      compilers, and mostly on any c99 compiler).
      
      based largely on commit 0376d44a890fea261506f1fc63833e7a686dca19 from
      nsz's libm git repo, with some additions (dummy versions of a few
      missing long double complex functions, etc.) by me.
      
      various cleanups still need to be made, including re-adding (if
      they're correct) some asm functions that were dropped.
      b69f695a