------- Additional Comments From mmitchel at gcc dot gnu dot org 2005-09-28 01:53 ------- I think the optimal sequence for f3 would look something like this, assuming that EAX contains the low-order word and EDX contains the high-order word after the prologue:
movl %edx, %ebx shrl $23, %ebx sall $9, %edx movl %eax, %ecx shrl $23, %ecx sall $9, %eax orl %ebx, %eax orl %ecx, %edx -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17886
