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rvv: extend softfloat to support 16-64 min/max function 

Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
pull/303/head
Chih-Min Chao 7 years ago
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887dbf2949
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b96463c921
3 changed files with 88 additions and 0 deletions
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  1. 81
      softfloat/fall_maxmin.c
  2. 6
      softfloat/softfloat.h
  3. 1
      softfloat/softfloat.mk.in

81
softfloat/fall_maxmin.c
View File

@ -0,0 +1,81 @@
/*============================================================================
This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
Package, Release 3d, by John R. Hauser.
Copyright 2011, 2012, 2013, 2014, 2015, 2016 The Regents of the University of
California. All rights reserved.
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. Neither the name of the University 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 REGENTS 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 REGENTS 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 <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include "platform.h"
#include "internals.h"
#include "specialize.h"
#include "softfloat.h"
#define COMPARE_MAX(a, b, bits) \
float ## bits ## _t f ## bits ## _max( float ## bits ## _t a, float ## bits ## _t b ) \
{ \
if (isNaNF ## bits ## UI(a.v) && isNaNF ## bits ## UI(b.v)) { \
union ui ## bits ## _f ## bits ui; \
ui.ui = defaultNaNF ## bits ## UI; \
return ui.f; \
} \
\
bool greater = f ## bits ## _lt_quiet(b, a) || \
(f ## bits ## _eq(b, a) && signF ## bits ## UI(b.v)); \
\
return greater || isNaNF ## bits ## UI((b).v) ? a : b; \
}
#define COMPARE_MIN(a, b, bits) \
float ## bits ## _t f ## bits ## _min( float ## bits ## _t a, float ## bits ## _t b ) \
{ \
if (isNaNF ## bits ## UI(a.v) && isNaNF ## bits ## UI(b.v)) { \
union ui ## bits ## _f ## bits ui; \
ui.ui = defaultNaNF ## bits ## UI; \
return ui.f; \
} \
\
bool greater = f ## bits ## _lt_quiet(a, b) || \
(f ## bits ## _eq(a, b) && signF ## bits ## UI(a.v)); \
\
return greater || isNaNF ## bits ## UI((b).v) ? a : b; \
}
COMPARE_MAX(a, b, 16);
COMPARE_MAX(a, b, 32);
COMPARE_MAX(a, b, 64);
COMPARE_MIN(a, b, 16);
COMPARE_MIN(a, b, 32);
COMPARE_MIN(a, b, 64);

6
softfloat/softfloat.h
View File

@ -160,6 +160,8 @@ void f16_to_f128M( float16_t, float128_t * );
float16_t f16_roundToInt( float16_t, uint_fast8_t, bool );
float16_t f16_add( float16_t, float16_t );
float16_t f16_sub( float16_t, float16_t );
float16_t f16_max( float16_t, float16_t );
float16_t f16_min( float16_t, float16_t );
float16_t f16_mul( float16_t, float16_t );
float16_t f16_mulAdd( float16_t, float16_t, float16_t );
float16_t f16_div( float16_t, float16_t );
@ -195,6 +197,8 @@ void f32_to_f128M( float32_t, float128_t * );
float32_t f32_roundToInt( float32_t, uint_fast8_t, bool );
float32_t f32_add( float32_t, float32_t );
float32_t f32_sub( float32_t, float32_t );
float32_t f32_max( float32_t, float32_t );
float32_t f32_min( float32_t, float32_t );
float32_t f32_mul( float32_t, float32_t );
float32_t f32_mulAdd( float32_t, float32_t, float32_t );
float32_t f32_div( float32_t, float32_t );
@ -231,6 +235,8 @@ void f64_to_f128M( float64_t, float128_t * );
float64_t f64_roundToInt( float64_t, uint_fast8_t, bool );
float64_t f64_add( float64_t, float64_t );
float64_t f64_sub( float64_t, float64_t );
float64_t f64_max( float64_t, float64_t );
float64_t f64_min( float64_t, float64_t );
float64_t f64_mul( float64_t, float64_t );
float64_t f64_mulAdd( float64_t, float64_t, float64_t );
float64_t f64_div( float64_t, float64_t );

1
softfloat/softfloat.mk.in
View File

@ -117,6 +117,7 @@ softfloat_c_srcs = \
f64_to_ui32_r_minMag.c \
f64_to_ui64.c \
f64_to_ui64_r_minMag.c \
fall_maxmin.c \
i32_to_f128.c \
i32_to_f16.c \
i32_to_f32.c \

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