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software/libbase: double precision FP glue

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This commit is contained in:
Sebastien Bourdeauducq 2012-05-24 23:47:32 +02:00
parent 275caae7f0
commit 78d5645236
1 changed files with 164 additions and 36 deletions
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200
software/libbase/softfloat-glue.c
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@ -1,14 +1,72 @@
/* $NetBSD: fplib_glue.c,v 1.2 2000/02/22 01:18:28 mycroft Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Neil A. Carson and Mark Brinicombe
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
#include "milieu.h"
#include "softfloat.h"
int __eqsf2(float32 a,float32 b);
int __eqdf2(float64 a,float64 b);
int __nesf2(float32 a,float32 b);
int __nedf2(float64 a,float64 b);
int __gtsf2(float32 a,float32 b);
int __gtdf2(float64 a,float64 b);
int __gesf2(float32 a,float32 b);
int __gedf2(float64 a,float64 b);
int __ltsf2(float32 a,float32 b);
int __ltdf2(float64 a,float64 b);
int __lesf2(float32 a,float32 b);
int __ledf2(float64 a,float64 b);
float32 __negsf2(float32 a);
float64 __negdf2(float64 a);
/********************************* COMPARISONS ********************************/
/*
* 'Equal' wrapper. This returns 0 if the numbers are equal, or (1 | -1)
* otherwise. So we need to invert the output.
*/
flag __eqsf2(float32 a, float32 b);
flag __eqsf2(float32 a, float32 b)
{
return !float32_eq(a, b);
int __eqsf2(float32 a,float32 b) {
return float32_eq(a,b)?0:1;
}
int __eqdf2(float64 a,float64 b) {
return float64_eq(a,b)?0:1;
}
/*
@ -17,10 +75,12 @@ flag __eqsf2(float32 a, float32 b)
* to use an 'equal' call and invert the result. The result is already
* inverted though! Confusing?!
*/
flag __nesf2(float32 a, float32 b);
flag __nesf2(float32 a, float32 b)
{
return !float32_eq(a, b);
int __nesf2(float32 a,float32 b) {
return float32_eq(a,b)?0:-1;
}
int __nedf2(float64 a,float64 b) {
return float64_eq(a,b)?0:-1;
}
/*
@ -30,38 +90,46 @@ flag __nesf2(float32 a, float32 b)
* make up our mind. This means that we can call 'less than or equal' and
* invert the result.
*/
flag __gtsf2(float32 a, float32 b);
flag __gtsf2(float32 a, float32 b)
{
return !float32_le(a, b);
int __gtsf2(float32 a,float32 b) {
return float32_le(a,b)?0:1;
}
int __gtdf2(float64 a,float64 b) {
return float64_le(a,b)?0:1;
}
/*
* 'Greater Than or Equal' wrapper. We emulate this by inverting the result
* of a 'less than' call.
*/
flag __gesf2(float32 a, float32 b);
flag __gesf2(float32 a, float32 b)
{
return !float32_lt(a, b);
int __gesf2(float32 a,float32 b) {
return float32_lt(a,b)?-1:0;
}
int __gedf2(float64 a,float64 b) {
return float64_lt(a,b)?-1:0;
}
/*
* 'Less Than' wrapper.
* 'Less Than' wrapper. A 1 from the ARM code needs to be turned into -1.
*/
flag __ltsf2(float32 a, float32 b);
flag __ltsf2(float32 a, float32 b)
{
return float32_lt(a, b);
int __ltsf2(float32 a,float32 b) {
return float32_lt(a,b)?-1:0;
}
int __ltdf2(float64 a,float64 b) {
return float64_lt(a,b)?-1:0;
}
/*
* 'Less Than or Equal' wrapper. A 0 must turn into a 1, and a 1 into a 0.
*/
flag __lesf2(float32 a, float32 b);
flag __lesf2(float32 a, float32 b)
{
return !float32_le(a, b);
int __lesf2(float32 a,float32 b) {
return float32_le(a,b)?0:1;
}
int __ledf2(float64 a,float64 b) {
return float64_le(a,b)?0:1;
}
/*
@ -70,14 +138,17 @@ flag __lesf2(float32 a, float32 b)
* position in the registers of arguments, the double precision version can
* go here too ;-)
*/
float32 __negsf2(float32 x);
float32 __negsf2(float32 x)
{
return x ^ 0x80000000;
float32 __negsf2(float32 a) {
return (a ^ 0x80000000);
}
float64 __negdf2(float64 a) {
a.high ^= 0x80000000;
return a;
}
/*
* 32-bit operations.
* 32-bit operations. This is not BSD code.
*/
float32 __addsf3(float32 a, float32 b);
float32 __addsf3(float32 a, float32 b)
@ -103,20 +174,20 @@ float32 __divsf3(float32 a, float32 b)
return float32_div(a, b);
}
float32 __floatsisf(int x);
float32 __floatsisf(int x)
float32 __floatsisf(int32 x);
float32 __floatsisf(int32 x)
{
return int32_to_float32(x);
}
int __fixsfsi(float32 x);
int __fixsfsi(float32 x)
int32 __fixsfsi(float32 x);
int32 __fixsfsi(float32 x)
{
return float32_to_int32_round_to_zero(x);
}
unsigned int __fixunssfsi(float32 x);
unsigned int __fixunssfsi(float32 x)
uint32 __fixunssfsi(float32 x);
uint32 __fixunssfsi(float32 x)
{
return float32_to_int32_round_to_zero(x); // XXX
}
@ -132,3 +203,60 @@ flag __unordsf2(float32 a, float32 b)
*/
return 1 ^ (float32_eq(a, a) & float32_eq(b, b));
}
/*
* 64-bit operations. This is not BSD code.
*/
float64 __adddf3(float64 a, float64 b);
float64 __adddf3(float64 a, float64 b)
{
return float64_add(a, b);
}
float64 __subdf3(float64 a, float64 b);
float64 __subdf3(float64 a, float64 b)
{
return float64_sub(a, b);
}
float64 __muldf3(float64 a, float64 b);
float64 __muldf3(float64 a, float64 b)
{
return float64_mul(a, b);
}
float64 __divdf3(float64 a, float64 b);
float64 __divdf3(float64 a, float64 b)
{
return float64_div(a, b);
}
float64 __floatsidf(int32 x);
float64 __floatsidf(int32 x)
{
return int32_to_float64(x);
}
int32 __fixdfsi(float64 x);
int32 __fixdfsi(float64 x)
{
return float64_to_int32_round_to_zero(x);
}
uint32 __fixunsdfsi(float64 x);
uint32 __fixunsdfsi(float64 x)
{
return float64_to_int32_round_to_zero(x); // XXX
}
flag __unorddf2(float64 a, float64 b);
flag __unorddf2(float64 a, float64 b)
{
/*
* The comparison is unordered if either input is a NaN.
* Test for this by comparing each operand with itself.
* We must perform both comparisons to correctly check for
* signalling NaNs.
*/
return 1 ^ (float64_eq(a, a) & float64_eq(b, b));
}