/* * Written by Ian Ollmann. * Copyright © 2005 Apple Computer Inc. */ #include <machine/asm.h> #include "abi.h" #if defined (__LP64__ ) #error this code not LP64 aware #endif ENTRY(rintl) fldt 4(%esp) frndint ret ENTRY( nearbyintl ) subl $28, %esp fldt 32( %esp ) //{f} //read fpcw + fpsw fnstenv (%esp) movw (%esp), %eax //or it with 0x20 movl %eax, %edx orl $0x20, %eax //stick it back int the fpcw movw %eax, (%esp) fldenv (%esp) //round frndint //{ result } //reset fpsw and fpcw movw %edx, (%esp) fldenv (%esp) addl $28, %esp ret //a short routine to get the local address local_addr: movl (%esp), %ebx ret ENTRY( llrintl ) pushl $0x5f000000 //0x1.0p63f subl $8, %esp xor %edx, %edx flds 8(%esp) //{0x1.0p63 } fldt 16( %esp ) //{f, 0x1.0p63} fucomi %ST(1), %ST //{f, 0x1.0p63} f>=0x1.0p63 fistpll (%esp) //{0x1.0p63} fstp %ST(0) //{} setnb %dl negl %edx movl (%esp), %eax xorl %edx, %eax xorl 4(%esp), %edx addl $12, %esp ret ENTRY( lrintl ) pushl $0x4f000000 //0x1.0p31f subl $8, %esp xor %edx, %edx flds 8(%esp) //{0x1.0p31f } fldt 16( %esp ) //{f, 0x1.0p31f} fucomi %ST(1), %ST //{f, 0x1.0p31f} f>=0x1.0p31f test for overflow fistpl (%esp) //{0x1.0p31f} fstp %ST(0) //{} setnb %dl negl %edx movl (%esp), %eax xorl %edx, %eax addl $12, %esp ret