/* $NetBSD: systfloat.S,v 1.3 2008/04/28 20:23:04 martin Exp $ */ /* This is a derivative work. */ /*- * Copyright (c) 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Ross Harvey. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* =============================================================================== This GNU assembler source file is part of TestFloat, Release 2a, a package of programs for testing the correctness of floating-point arithmetic complying to the IEC/IEEE Standard for Floating-Point. Written by John R. Hauser. More information is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'. THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE. Derivative works are acceptable, even for commercial purposes, so long as (1) they include prominent notice that the work is derivative, and (2) they include prominent notice akin to these four paragraphs for those parts of this code that are retained. =============================================================================== */ .text /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ #include <machine/asm.h> ENTRY(syst_int32_to_floatx80) fildl 8(%esp) movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_int64_to_floatx80) fildq 8(%esp) movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_float32_to_floatx80) flds 8(%esp) movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_float64_to_floatx80) fldl 8(%esp) movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_to_int32) fldt 4(%esp) subl $4,%esp fistpl (%esp) movl (%esp),%eax addl $4,%esp ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_to_int64) fldt 4(%esp) subl $8,%esp fistpq (%esp) movl (%esp),%eax movl 4(%esp),%edx addl $8,%esp ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_to_float32) fldt 4(%esp) subl $4,%esp fstps (%esp) movl (%esp),%eax addl $4,%esp ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_to_float64) fldt 4(%esp) subl $8,%esp fstpl (%esp) movl 4(%esp),%edx movl (%esp),%eax addl $8,%esp ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_round_to_int) fldt 8(%esp) frndint movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_add) fldt 8(%esp) fldt 20(%esp) faddp movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_sub) fldt 8(%esp) fldt 20(%esp) fsubrp movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_mul) fldt 8(%esp) fldt 20(%esp) fmulp movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_div) fldt 8(%esp) fldt 20(%esp) fdivrp movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_rem) fldt 20(%esp) fldt 8(%esp) floatx80_rem_loop: fprem1 fnstsw %ax btw $10,%ax jc floatx80_rem_loop movl 4(%esp),%eax fstpt (%eax) fstp %st(0) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_sqrt) fldt 8(%esp) fsqrt movl 4(%esp),%eax fstpt (%eax) ret $4 /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_eq) fldt 16(%esp) fldt 4(%esp) fucompp fnstsw %ax andw $17664,%ax cmpw $16384,%ax seteb %al movzb %al,%eax ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_le) fldt 4(%esp) fldt 16(%esp) fcompp fnstsw %ax notl %eax shrl $8,%eax andl $1,%eax ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_lt) fldt 4(%esp) fldt 16(%esp) fcompp fnstsw %ax andw $17664,%ax setzb %al movzb %al,%eax ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_eq_signaling) fldt 16(%esp) fldt 4(%esp) fcompp fnstsw %ax andw $17664,%ax cmpw $16384,%ax seteb %al movzb %al,%eax ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_le_quiet) fldt 4(%esp) fldt 16(%esp) fucompp fnstsw %ax notl %eax shrl $8,%eax andl $1,%eax ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_lt_quiet) fldt 4(%esp) fldt 16(%esp) fucompp fnstsw %ax andw $17664,%ax setzb %al movzb %al,%eax ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_to_int32_round_to_zero) pushl %ebp movl %esp,%ebp subl $12,%esp fldt 8(%ebp) fnstcw -4(%ebp) movl -4(%ebp),%edx movb $12,%dh movl %edx,-12(%ebp) fldcw -12(%ebp) fistpl -12(%ebp) movl -12(%ebp),%eax fldcw -4(%ebp) leave ret /* ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- */ ENTRY(syst_floatx80_to_int64_round_to_zero) pushl %ebp movl %esp,%ebp subl $12,%esp fldt 8(%ebp) fnstcw -4(%ebp) movl -4(%ebp),%ecx movb $12,%ch movl %ecx,-12(%ebp) fldcw -12(%ebp) fistpq -12(%ebp) movl -12(%ebp),%eax movl -8(%ebp),%edx fldcw -4(%ebp) leave ret
