------- Additional Comments From uros at kss-loka dot si 2004-11-30 14:58
-------
'gcc -O -march=pentium4 -fomit-frame-pointer -S t32.c' now produces:
.file "t32.c"
.text
.globl old_64_to_32
.type old_64_to_32, @function
old_64_to_32:
subl $12, %esp
movq %mm0, (%esp)
movl (%esp), %eax
addl $12, %esp
ret
.size old_64_to_32, .-old_64_to_32
.globl new_64_to_32
.type new_64_to_32, @function
new_64_to_32:
subl $12, %esp
movq %mm0, (%esp)
movl (%esp), %eax
addl $12, %esp
ret
.size new_64_to_32, .-new_64_to_32
.globl old_32_to_64
.type old_32_to_64, @function
old_32_to_64:
movl 4(%esp), %eax
movd 8(%esp), %mm0
movq %mm0, (%eax)
ret $4
.size old_32_to_64, .-old_32_to_64
.globl new_32_to_64
.type new_32_to_64, @function
new_32_to_64:
movl 4(%esp), %eax
movd 8(%esp), %mm0
movq %mm0, (%eax)
ret $4
.size new_32_to_64, .-new_32_to_64
.ident "GCC: (GNU) 4.0.0 20041130 (experimental)"
.section .note.GNU-stack,"",@progbits
new_* and old_* functions produce the same code.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11628
