http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56788
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Marc Glisse from comment #1) > _mm_frcz_ss is inconsistent between compilers. Microsoft gives it 2 > arguments and movss-like semantics, whereas clang gives it a single > argument. AMD doesn't document intrinsics, and I can't find any relevant > Intel doc. clang is wrong, please see "Return value" section in [1]: A 128-bit result r that contains four 32-bit floating-point values. r[0] := fractional_part_of(src[0]); r[i] := high[i]; // i = 1,2,3 [1] http://msdn.microsoft.com/en-us/library/vstudio/gg445126%28v=vs.100%29.aspx
