>>>>> "Andrew" == Andrew Gierth <andrew@tao11.riddles.org.uk> writes:
Andrew> Specifying a recent microarch makes it use 64-bit FP registers
Andrew> rather than 80-bit ones:
Andrew> cc -O2 -m32 -march=skylake flttst.c && ./a.out
Andrew> r1 = 1, r2 = 1
where "recent" means "since about 2000 or so":
cc -O2 -m32 -march=pentium4 flttst.c && ./a.out
r1 = 1, r2 = 1
(the actual requirement is for SSE2 support)
--
Andrew (irc:RhodiumToad)
