ext: Update softfloat to 3d full version

* Add all softfloat source files without any change. * Remove useless file softfloat.mk.in, since gem5 use Scons. * Add `use_fast_int64` in SConscript to distinguish src of two strategies for data larger than 64 bits. * The SoftFloat library uses two strategies to handle data larger than 64bit. One is spliting data into `fast_int64`, and the other is using pointer. Two strategies are distinguished by macro `SOFTFLOAT_FAST_INT64`. But not all "*.c" files are guarded by this macro, which leads to including useless files in compiling progress and compiling error. `use_fast_int64` used in SConscript can exclude unnecessary files. Change-Id: I7cec10412c00a35c247299cd92d83cdee9066410 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/66552 Maintainer: Jason Lowe-Power <[email protected]> Tested-by: kokoro <[email protected]> Reviewed-by: Hoa Nguyen <[email protected]>
trollet91 · Mar 28, 2023 · 461520d · 461520d
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diff --git a/ext/softfloat/SConscript b/ext/softfloat/SConscript
diff --git a/ext/softfloat/extF80M_add.c b/ext/softfloat/extF80M_add.c
@@ -0,0 +1,100 @@
+
+/*============================================================================
+
+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 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 <stdbool.h>
+#include "platform.h"
+#include "internals.h"
+#include "softfloat.h"
+
+#ifdef SOFTFLOAT_FAST_INT64
+
+void
+ extF80M_add(
+     const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr )
+{
+    const struct extFloat80M *aSPtr, *bSPtr;
+    uint_fast16_t uiA64;
+    uint_fast64_t uiA0;
+    bool signA;
+    uint_fast16_t uiB64;
+    uint_fast64_t uiB0;
+    bool signB;
+#if ! defined INLINE_LEVEL || (INLINE_LEVEL < 2)
+    extFloat80_t
+        (*magsFuncPtr)(
+            uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool );
+#endif
+
+    aSPtr = (const struct extFloat80M *) aPtr;
+    bSPtr = (const struct extFloat80M *) bPtr;
+    uiA64 = aSPtr->signExp;
+    uiA0  = aSPtr->signif;
+    signA = signExtF80UI64( uiA64 );
+    uiB64 = bSPtr->signExp;
+    uiB0  = bSPtr->signif;
+    signB = signExtF80UI64( uiB64 );
+#if defined INLINE_LEVEL && (2 <= INLINE_LEVEL)
+    if ( signA == signB ) {
+        *zPtr = softfloat_addMagsExtF80( uiA64, uiA0, uiB64, uiB0, signA );
+    } else {
+        *zPtr = softfloat_subMagsExtF80( uiA64, uiA0, uiB64, uiB0, signA );
+    }
+#else
+    magsFuncPtr =
+        (signA == signB) ? softfloat_addMagsExtF80 : softfloat_subMagsExtF80;
+    *zPtr = (*magsFuncPtr)( uiA64, uiA0, uiB64, uiB0, signA );
+#endif
+
+}
+
+#else
+
+void
+ extF80M_add(
+     const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr )
+{
+
+    softfloat_addExtF80M(
+        (const struct extFloat80M *) aPtr,
+        (const struct extFloat80M *) bPtr,
+        (struct extFloat80M *) zPtr,
+        false
+    );
+
+}
+
+#endif
+
diff --git a/ext/softfloat/extF80M_div.c b/ext/softfloat/extF80M_div.c
@@ -0,0 +1,194 @@
+
+/*============================================================================
+
+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 <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+#ifdef SOFTFLOAT_FAST_INT64
+
+void
+ extF80M_div(
+     const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr )
+{
+
+    *zPtr = extF80_div( *aPtr, *bPtr );
+
+}
+
+#else
+
+void
+ extF80M_div(
+     const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr )
+{
+    const struct extFloat80M *aSPtr, *bSPtr;
+    struct extFloat80M *zSPtr;
+    uint_fast16_t uiA64;
+    int32_t expA;
+    uint_fast16_t uiB64;
+    int32_t expB;
+    bool signZ;
+    uint64_t sigA, x64;
+    int32_t expZ;
+    int shiftDist;
+    uint32_t y[3], recip32, sigB[3];
+    int ix;
+    uint32_t q, qs[2];
+    uint_fast16_t uiZ64;
+    uint64_t uiZ0;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    aSPtr = (const struct extFloat80M *) aPtr;
+    bSPtr = (const struct extFloat80M *) bPtr;
+    zSPtr = (struct extFloat80M *) zPtr;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uiA64 = aSPtr->signExp;
+    expA = expExtF80UI64( uiA64 );
+    uiB64 = bSPtr->signExp;
+    expB = expExtF80UI64( uiB64 );
+    signZ = signExtF80UI64( uiA64 ) ^ signExtF80UI64( uiB64 );
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( (expA == 0x7FFF) || (expB == 0x7FFF) ) {
+        if ( softfloat_tryPropagateNaNExtF80M( aSPtr, bSPtr, zSPtr ) ) return;
+        if ( expA == 0x7FFF ) {
+            if ( expB == 0x7FFF ) goto invalid;
+            goto infinity;
+        }
+        goto zero;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    sigA = aSPtr->signif;
+    x64 = bSPtr->signif;
+    if ( ! expB ) expB = 1;
+    if ( ! (x64 & UINT64_C( 0x8000000000000000 )) ) {
+        if ( ! x64 ) {
+            if ( ! sigA ) goto invalid;
+            softfloat_raiseFlags( softfloat_flag_infinite );
+            goto infinity;
+        }
+        expB += softfloat_normExtF80SigM( &x64 );
+    }
+    if ( ! expA ) expA = 1;
+    if ( ! (sigA & UINT64_C( 0x8000000000000000 )) ) {
+        if ( ! sigA ) goto zero;
+        expA += softfloat_normExtF80SigM( &sigA );
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    expZ = expA - expB + 0x3FFF;
+    shiftDist = 29;
+    if ( sigA < x64 ) {
+        --expZ;
+        shiftDist = 30;
+    }
+    softfloat_shortShiftLeft64To96M( sigA, shiftDist, y );
+    recip32 = softfloat_approxRecip32_1( x64>>32 );
+    sigB[indexWord( 3, 0 )] = (uint32_t) x64<<30;
+    x64 >>= 2;
+    sigB[indexWord( 3, 2 )] = x64>>32;
+    sigB[indexWord( 3, 1 )] = x64;
+    ix = 2;
+    for (;;) {
+        x64 = (uint64_t) y[indexWordHi( 3 )] * recip32;
+        q = (x64 + 0x80000000)>>32;
+        --ix;
+        if ( ix < 0 ) break;
+        softfloat_remStep96MBy32( y, 29, sigB, q, y );
+        if ( y[indexWordHi( 3 )] & 0x80000000 ) {
+            --q;
+            softfloat_add96M( y, sigB, y );
+        }
+        qs[ix] = q;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( ((q + 1) & 0x3FFFFF) < 2 ) {
+        softfloat_remStep96MBy32( y, 29, sigB, q, y );
+        if ( y[indexWordHi( 3 )] & 0x80000000 ) {
+            --q;
+            softfloat_add96M( y, sigB, y );
+        } else if ( softfloat_compare96M( sigB, y ) <= 0 ) {
+            ++q;
+            softfloat_sub96M( y, sigB, y );
+        }
+        if (
+            y[indexWordLo( 3 )] || y[indexWord( 3, 1 )] || y[indexWord( 3, 2 )]
+        ) {
+            q |= 1;
+        }
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    x64 = (uint64_t) q<<9;
+    y[indexWord( 3, 0 )] = x64;
+    x64 = ((uint64_t) qs[0]<<6) + (x64>>32);
+    y[indexWord( 3, 1 )] = x64;
+    y[indexWord( 3, 2 )] = (qs[1]<<3) + (x64>>32);
+    softfloat_roundPackMToExtF80M(
+        signZ, expZ, y, extF80_roundingPrecision, zSPtr );
+    return;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ invalid:
+    softfloat_invalidExtF80M( zSPtr );
+    return;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ infinity:
+    uiZ64 = packToExtF80UI64( signZ, 0x7FFF );
+    uiZ0  = UINT64_C( 0x8000000000000000 );
+    goto uiZ;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ zero:
+    uiZ64 = packToExtF80UI64( signZ, 0 );
+    uiZ0  = 0;
+ uiZ:
+    zSPtr->signExp = uiZ64;
+    zSPtr->signif  = uiZ0;
+
+}
+
+#endif
+
diff --git a/ext/softfloat/extF80M_eq.c b/ext/softfloat/extF80M_eq.c
@@ -0,0 +1,98 @@
+
+/*============================================================================
+
+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 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 <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+#ifdef SOFTFLOAT_FAST_INT64
+
+bool extF80M_eq( const extFloat80_t *aPtr, const extFloat80_t *bPtr )
+{
+
+    return extF80_eq( *aPtr, *bPtr );
+
+}
+
+#else
+
+bool extF80M_eq( const extFloat80_t *aPtr, const extFloat80_t *bPtr )
+{
+    const struct extFloat80M *aSPtr, *bSPtr;
+    uint_fast16_t uiA64;
+    uint64_t uiA0;
+    uint_fast16_t uiB64;
+    uint64_t uiB0;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    aSPtr = (const struct extFloat80M *) aPtr;
+    bSPtr = (const struct extFloat80M *) bPtr;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uiA64 = aSPtr->signExp;
+    uiA0  = aSPtr->signif;
+    uiB64 = bSPtr->signExp;
+    uiB0  = bSPtr->signif;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( isNaNExtF80UI( uiA64, uiA0 ) || isNaNExtF80UI( uiB64, uiB0 ) ) {
+        if (
+               softfloat_isSigNaNExtF80UI( uiA64, uiA0 )
+            || softfloat_isSigNaNExtF80UI( uiB64, uiB0 )
+        ) {
+            softfloat_raiseFlags( softfloat_flag_invalid );
+        }
+        return false;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( uiA0 == uiB0 ) {
+        return (uiA64 == uiB64) || ! uiA0;
+    } else {
+        if ( ! ((uiA0 & uiB0) & UINT64_C( 0x8000000000000000 )) ) {
+            return ! softfloat_compareNonnormExtF80M( aSPtr, bSPtr );
+        }
+        return false;
+    }
+
+}
+
+#endif
+