Remove unused softfloat implementation.

The softfloat functionality is unused, not installed and incomplete.
On platforms without floating point units, the compiler provides a softfloat
implementation so there is no point in carrying this code around locally.

doc/avutil.txt

@@ -19,7 +19,6 @@ integer.c               128bit integer math
 lls.c
 mathematics.c           greatest common divisor, integer sqrt, integer log2, ...
 mem.c                   memory allocation routines with guaranteed alignment
-softfloat.c
 
 Headers:
 bswap.h                 big/little/native-endian conversion code

libavutil/Makefile

@@ -75,7 +75,7 @@ OBJS-$(ARCH_ARM) += arm/cpu.o
 OBJS-$(ARCH_PPC) += ppc/cpu.o
 OBJS-$(ARCH_X86) += x86/cpu.o
 
-TESTPROGS = adler32 aes base64 cpu crc des lls md5 pca sha softfloat tree
+TESTPROGS = adler32 aes base64 cpu crc des lls md5 pca sha tree
 TESTPROGS-$(HAVE_LZO1X_999_COMPRESS) += lzo
 
 DIRS = arm bfin sh4 x86

libavutil/softfloat.c

@@ -1,72 +0,0 @@
-/*
- * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * Libav is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <inttypes.h>
-#include <stdio.h>
-#include <assert.h>
-#include "softfloat.h"
-#include "common.h"
-#include "log.h"
-
-#undef printf
-
-int main(void){
-    SoftFloat one= av_int2sf(1, 0);
-    SoftFloat sf1, sf2;
-    double d1, d2;
-    int i, j;
-    av_log_set_level(AV_LOG_DEBUG);
-
-    d1= 1;
-    for(i= 0; i<10; i++){
-        d1= 1/(d1+1);
-    }
-    printf("test1 double=%d\n", (int)(d1 * (1<<24)));
-
-    sf1= one;
-    for(i= 0; i<10; i++){
-        sf1= av_div_sf(one, av_normalize_sf(av_add_sf(one, sf1)));
-    }
-    printf("test1 sf    =%d\n", av_sf2int(sf1, 24));
-
-
-    for(i= 0; i<100; i++){
-        START_TIMER
-        d1= i;
-        d2= i/100.0;
-        for(j= 0; j<1000; j++){
-            d1= (d1+1)*d2;
-        }
-        STOP_TIMER("float add mul")
-    }
-    printf("test2 double=%d\n", (int)(d1 * (1<<24)));
-
-    for(i= 0; i<100; i++){
-        START_TIMER
-        sf1= av_int2sf(i, 0);
-        sf2= av_div_sf(av_int2sf(i, 2), av_int2sf(200, 3));
-        for(j= 0; j<1000; j++){
-            sf1= av_mul_sf(av_add_sf(sf1, one),sf2);
-        }
-        STOP_TIMER("softfloat add mul")
-    }
-    printf("test2 sf    =%d (%d %d)\n", av_sf2int(sf1, 24), sf1.exp, sf1.mant);
-    return 0;
-}

libavutil/softfloat.h

@@ -1,126 +0,0 @@
-/*
- * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
- *
- * This file is part of Libav.
- *
- * Libav is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * Libav is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVUTIL_SOFTFLOAT_H
-#define AVUTIL_SOFTFLOAT_H
-
-#include <stdint.h>
-#include "common.h"
-
-#define MIN_EXP -126
-#define MAX_EXP  126
-#define ONE_BITS 29
-
-typedef struct SoftFloat{
-    int32_t  exp;
-    int32_t mant;
-}SoftFloat;
-
-static av_const SoftFloat av_normalize_sf(SoftFloat a){
-    if(a.mant){
-#if 1
-        while((a.mant + 0x20000000U)<0x40000000U){
-            a.mant += a.mant;
-            a.exp  -= 1;
-        }
-#else
-        int s=ONE_BITS + 1 - av_log2(a.mant ^ (a.mant<<1));
-        a.exp   -= s;
-        a.mant <<= s;
-#endif
-        if(a.exp < MIN_EXP){
-            a.exp = MIN_EXP;
-            a.mant= 0;
-        }
-    }else{
-        a.exp= MIN_EXP;
-    }
-    return a;
-}
-
-static inline av_const SoftFloat av_normalize1_sf(SoftFloat a){
-#if 1
-    if(a.mant + 0x40000000 < 0){
-        a.exp++;
-        a.mant>>=1;
-    }
-    return a;
-#elif 1
-    int t= a.mant + 0x40000000 < 0;
-    return (SoftFloat){a.exp+t, a.mant>>t};
-#else
-    int t= (a.mant + 0x40000000U)>>31;
-    return (SoftFloat){a.exp+t, a.mant>>t};
-#endif
-}
-
-/**
- * @return Will not be more denormalized than a+b. So if either input is
- *         normalized, then the output will not be worse then the other input.
- *         If both are normalized, then the output will be normalized.
- */
-static inline av_const SoftFloat av_mul_sf(SoftFloat a, SoftFloat b){
-    a.exp += b.exp;
-    a.mant = (a.mant * (int64_t)b.mant) >> ONE_BITS;
-    return av_normalize1_sf(a);
-}
-
-/**
- * b has to be normalized and not zero.
- * @return Will not be more denormalized than a.
- */
-static av_const SoftFloat av_div_sf(SoftFloat a, SoftFloat b){
-    a.exp -= b.exp+1;
-    a.mant = ((int64_t)a.mant<<(ONE_BITS+1)) / b.mant;
-    return av_normalize1_sf(a);
-}
-
-static inline av_const int av_cmp_sf(SoftFloat a, SoftFloat b){
-    int t= a.exp - b.exp;
-    if(t<0) return (a.mant >> (-t)) -  b.mant      ;
-    else    return  a.mant          - (b.mant >> t);
-}
-
-static inline av_const SoftFloat av_add_sf(SoftFloat a, SoftFloat b){
-    int t= a.exp - b.exp;
-    if(t<0) return av_normalize1_sf((SoftFloat){b.exp, b.mant + (a.mant >> (-t))});
-    else    return av_normalize1_sf((SoftFloat){a.exp, a.mant + (b.mant >>   t )});
-}
-
-static inline av_const SoftFloat av_sub_sf(SoftFloat a, SoftFloat b){
-    return av_add_sf(a, (SoftFloat){b.exp, -b.mant});
-}
-
-//FIXME sqrt, log, exp, pow, sin, cos
-
-static inline av_const SoftFloat av_int2sf(int v, int frac_bits){
-    return av_normalize_sf((SoftFloat){ONE_BITS-frac_bits, v});
-}
-
-/**
- * Rounding is to -inf.
- */
-static inline av_const int av_sf2int(SoftFloat v, int frac_bits){
-    v.exp += frac_bits - ONE_BITS;
-    if(v.exp >= 0) return v.mant <<  v.exp ;
-    else           return v.mant >>(-v.exp);
-}
-
-#endif /* AVUTIL_SOFTFLOAT_H */