Upgrade to SoftFloat 3e

1 files changed, 158 insertions, 0 deletions

diff --git a/softfloat/extF80_mul.c b/softfloat/extF80_mul.c
new file mode 100644
index 0000000..c0c50a6
--- /dev/null
+++ b/softfloat/extF80_mul.c
@@ -0,0 +1,158 @@
+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3e, 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"
+
+extFloat80_t extF80_mul( extFloat80_t a, extFloat80_t b )
+{
+    union { struct extFloat80M s; extFloat80_t f; } uA;
+    uint_fast16_t uiA64;
+    uint_fast64_t uiA0;
+    bool signA;
+    int_fast32_t expA;
+    uint_fast64_t sigA;
+    union { struct extFloat80M s; extFloat80_t f; } uB;
+    uint_fast16_t uiB64;
+    uint_fast64_t uiB0;
+    bool signB;
+    int_fast32_t expB;
+    uint_fast64_t sigB;
+    bool signZ;
+    uint_fast64_t magBits;
+    struct exp32_sig64 normExpSig;
+    int_fast32_t expZ;
+    struct uint128 sig128Z, uiZ;
+    uint_fast16_t uiZ64;
+    uint_fast64_t uiZ0;
+    union { struct extFloat80M s; extFloat80_t f; } uZ;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uA.f = a;
+    uiA64 = uA.s.signExp;
+    uiA0  = uA.s.signif;
+    signA = signExtF80UI64( uiA64 );
+    expA  = expExtF80UI64( uiA64 );
+    sigA  = uiA0;
+    uB.f = b;
+    uiB64 = uB.s.signExp;
+    uiB0  = uB.s.signif;
+    signB = signExtF80UI64( uiB64 );
+    expB  = expExtF80UI64( uiB64 );
+    sigB  = uiB0;
+    signZ = signA ^ signB;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( expA == 0x7FFF ) {
+        if (
+               (sigA & UINT64_C( 0x7FFFFFFFFFFFFFFF ))
+            || ((expB == 0x7FFF) && (sigB & UINT64_C( 0x7FFFFFFFFFFFFFFF )))
+        ) {
+            goto propagateNaN;
+        }
+        magBits = expB | sigB;
+        goto infArg;
+    }
+    if ( expB == 0x7FFF ) {
+        if ( sigB & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) goto propagateNaN;
+        magBits = expA | sigA;
+        goto infArg;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ( ! expA ) expA = 1;
+    if ( ! (sigA & UINT64_C( 0x8000000000000000 )) ) {
+        if ( ! sigA ) goto zero;
+        normExpSig = softfloat_normSubnormalExtF80Sig( sigA );
+        expA += normExpSig.exp;
+        sigA = normExpSig.sig;
+    }
+    if ( ! expB ) expB = 1;
+    if ( ! (sigB & UINT64_C( 0x8000000000000000 )) ) {
+        if ( ! sigB ) goto zero;
+        normExpSig = softfloat_normSubnormalExtF80Sig( sigB );
+        expB += normExpSig.exp;
+        sigB = normExpSig.sig;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    expZ = expA + expB - 0x3FFE;
+    sig128Z = softfloat_mul64To128( sigA, sigB );
+    if ( sig128Z.v64 < UINT64_C( 0x8000000000000000 ) ) {
+        --expZ;
+        sig128Z =
+            softfloat_add128(
+                sig128Z.v64, sig128Z.v0, sig128Z.v64, sig128Z.v0 );
+    }
+    return
+        softfloat_roundPackToExtF80(
+            signZ, expZ, sig128Z.v64, sig128Z.v0, extF80_roundingPrecision );
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ propagateNaN:
+    uiZ = softfloat_propagateNaNExtF80UI( uiA64, uiA0, uiB64, uiB0 );
+    uiZ64 = uiZ.v64;
+    uiZ0  = uiZ.v0;
+    goto uiZ;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ infArg:
+    if ( ! magBits ) {
+        softfloat_raiseFlags( softfloat_flag_invalid );
+        uiZ64 = defaultNaNExtF80UI64;
+        uiZ0  = defaultNaNExtF80UI0;
+    } else {
+        uiZ64 = packToExtF80UI64( signZ, 0x7FFF );
+        uiZ0  = UINT64_C( 0x8000000000000000 );
+    }
+    goto uiZ;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ zero:
+    uiZ64 = packToExtF80UI64( signZ, 0 );
+    uiZ0  = 0;
+ uiZ:
+    uZ.s.signExp = uiZ64;
+    uZ.s.signif  = uiZ0;
+    return uZ.f;
+
+}
+