/* $NetBSD: qp.c,v 1.3 2018/08/27 16:46:13 ryo Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* 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.
*/
#include <sys/cdefs.h>
#include "milieu.h"
#include "softfloat.h"
/*
* This file provides wrappers for the softfloat functions. We can't use
* invoke them directly since long double arguments are passed in FP/SIMD
* as well as being returned in them while float128 arguments are passed
* in normal registers.
*/
long double __addtf3(long double, long double);
long double __divtf3(long double, long double);
long double __modtf3(long double, long double);
long double __multf3(long double, long double);
long double __negtf2(long double);
long double __subtf3(long double, long double);
double __trunctfdf2(long double);
float __trunctfsf2(long double);
long double __extendsftf2(float);
long double __extenddftf2(double);
long double __floatsitf(int32_t);
long double __floatditf(int64_t);
long double __floatunsitf(uint32_t);
long double __floatunditf(uint64_t);
int32_t __fixtfsi(long double);
int64_t __fixtfdi(long double);
uint32_t __fixuntfsi(long double);
uint64_t __fixuntfdi(long double);
#if 0
long double __floattitf(int128_t);
long double __floatuntitf(uint128_t);
int128_t __fixtfti(long double);
uint128_t __fixuntfti(long double);
#endif
union sf_ieee_flt_u {
float fltu_f;
float32 fltu_f32;
};
union sf_ieee_dbl_u {
double dblu_d;
float64 dblu_f64;
};
union sf_ieee_ldbl_u {
long double ldblu_ld;
float128 ldblu_f128;
};
long double
__addtf3(long double ld_a, long double ld_b)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_ldbl_u b = { .ldblu_ld = ld_b };
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = float128_add(a.ldblu_f128, b.ldblu_f128)
};
return c.ldblu_ld;
}
long double
__divtf3(long double ld_a, long double ld_b)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_ldbl_u b = { .ldblu_ld = ld_b };
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = float128_div(a.ldblu_f128, b.ldblu_f128)
};
return c.ldblu_ld;
}
long double
__multf3(long double ld_a, long double ld_b)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_ldbl_u b = { .ldblu_ld = ld_b };
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = float128_mul(a.ldblu_f128, b.ldblu_f128)
};
return c.ldblu_ld;
}
long double
__negtf2(long double ld_a)
{
const union sf_ieee_ldbl_u zero = { .ldblu_ld = 0.0 };
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_ldbl_u b = {
.ldblu_f128 = float128_div(zero.ldblu_f128, a.ldblu_f128)
};
return b.ldblu_ld;
}
long double
__subtf3(long double ld_a, long double ld_b)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_ldbl_u b = { .ldblu_ld = ld_b };
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = float128_sub(a.ldblu_f128, b.ldblu_f128)
};
return c.ldblu_ld;
}
#if 0
int
__cmptf3(float128 *a, float128 *b)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_ldbl_u b = { .ldblu_ld = ld_b };
if (float128_eq(*a, *b))
return 0;
if (float128_le(*a, *b))
return 1;
return 2;
}
/*
* XXX
*/
int
_Qp_cmpe(float128 *a, float128 *b)
{
return _Qp_cmp(a, b);
}
#endif
float
__trunctfsf2(long double ld_a)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_flt_u c = {
.fltu_f32 = float128_to_float32(a.ldblu_f128),
};
return c.fltu_f;
}
double
__trunctfdf2(long double ld_a)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
const union sf_ieee_dbl_u c = {
.dblu_f64 = float128_to_float64(a.ldblu_f128),
};
return c.dblu_d;
}
int32_t
__fixtfsi(long double ld_a)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
return float128_to_int32_round_to_zero(a.ldblu_f128);
}
int64_t
__fixtfdi(long double ld_a)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
return float128_to_int64_round_to_zero(a.ldblu_f128);
}
#if 0
uint32_t
__fixuntfsi(long double ld_a)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
return float128_to_uint32_round_to_zero(a.ldblu_f128);
}
uint64_t
__fixuntfdi(long double ld_a)
{
const union sf_ieee_ldbl_u a = { .ldblu_ld = ld_a };
return float128_to_uint64_round_to_zero(a.ldblu_f128);
}
#endif
long double
__extendsftf2(float f_a)
{
const union sf_ieee_flt_u a = { .fltu_f = f_a };
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = float32_to_float128(a.fltu_f32)
};
return c.ldblu_ld;
}
long double
__extenddftf2(double d_a)
{
const union sf_ieee_dbl_u a = { .dblu_d = d_a };
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = float64_to_float128(a.dblu_f64)
};
return c.ldblu_ld;
}
long double
__floatunsitf(uint32_t a)
{
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = int64_to_float128(a)
};
return c.ldblu_ld;
}
long double
__floatunditf(uint64_t a)
{
union sf_ieee_ldbl_u c;
const uint64_t msb64 = 1LL << 63;
if (a & msb64) {
static const union sf_ieee_ldbl_u two63 = {
.ldblu_ld = 0x1.0p63
};
c.ldblu_f128 = int64_to_float128(a ^ msb64);
c.ldblu_f128 = float128_add(c.ldblu_f128, two63.ldblu_f128);
} else {
c.ldblu_f128 = int64_to_float128(a);
}
return c.ldblu_ld;
}
long double
__floatsitf(int32_t a)
{
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = int64_to_float128(a)
};
return c.ldblu_ld;
}
long double
__floatditf(int64_t a)
{
const union sf_ieee_ldbl_u c = {
.ldblu_f128 = int64_to_float128(a)
};
return c.ldblu_ld;
}