kolibrios-fun/programs/develop/libraries/kolibri-libc/source/math/floor.s

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/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
.global floor;
floor:
pushl %ebp
movl %esp,%ebp
subl $8,%esp
fstcw -4(%ebp)
fwait
movw -4(%ebp),%ax
andw $0xf3ff,%ax
orw $0x0400,%ax
movw %ax,-2(%ebp)
fldcw -2(%ebp)
fldl 8(%ebp)
frndint
fldcw -4(%ebp)
movl %ebp,%esp
popl %ebp
ret