Upgrade to softfloat3e.

This should solve licensing problems as well.
2024-06-09 23:08:46 +02:00
parent 4b77ef6823
commit 0f29bcddf1
271 changed files with 25882 additions and 10441 deletions
--- a/src/cpu/softfloat3e/extF80_scale.cc
+++ b/src/cpu/softfloat3e/extF80_scale.cc
@@ -0,0 +1,136 @@
+/*============================================================================
+
+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, 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 <stdint.h>
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+/*----------------------------------------------------------------------------
+| Scales extended double-precision floating-point value in operand `a' by
+| value `b'. The function truncates the value in the second operand 'b' to
+| an integral value and adds that value to the exponent of the operand 'a'.
+| The operation performed according to the IEC/IEEE Standard for Binary
+| Floating-Point Arithmetic.
+*----------------------------------------------------------------------------*/
+
+extFloat80_t extF80_scale(extFloat80_t a, extFloat80_t b, struct softfloat_status_t *status)
+{
+    uint16_t uiA64;
+    uint64_t uiA0;
+    bool signA;
+    int32_t expA;
+    uint64_t sigA;
+    uint16_t uiB64;
+    uint64_t uiB0;
+    bool signB;
+    int32_t expB;
+    uint64_t sigB;
+    struct exp32_sig64 normExpSig;
+
+    // handle unsupported extended double-precision floating encodings
+    if (extF80_isUnsupported(a) || extF80_isUnsupported(b)) {
+invalid:
+        softfloat_raiseFlags(status, softfloat_flag_invalid);
+        return packToExtF80_twoargs(defaultNaNExtF80UI64, defaultNaNExtF80UI0);
+    }
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uiA64 = a.signExp;
+    uiA0  = a.signif;
+    signA = signExtF80UI64(uiA64);
+    expA  = expExtF80UI64(uiA64);
+    sigA  = uiA0;
+    uiB64 = b.signExp;
+    uiB0  = b.signif;
+    signB = signExtF80UI64(uiB64);
+    expB  = expExtF80UI64(uiB64);
+    sigB  = uiB0;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+
+    if (expA == 0x7FFF) {
+        if ((sigA<<1) || ((expB == 0x7FFF) && (sigB<<1))) {
+            return softfloat_propagateNaNExtF80UI(uiA64, uiA0, uiB64, uiB0, status);
+        }
+        if ((expB == 0x7FFF) && signB) goto invalid;
+        if (sigB && !expB) softfloat_raiseFlags(status, softfloat_flag_denormal);
+        return a;
+    }
+    if (expB == 0x7FFF) {
+        if (sigB<<1) {
+            return softfloat_propagateNaNExtF80UI(uiA64, uiA0, uiB64, uiB0, status);
+        }
+        if ((expA | sigA) == 0) {
+            if (! signB) goto invalid;
+            return a;
+        }
+        if (sigA && !expA) softfloat_raiseFlags(status, softfloat_flag_denormal);
+        if (signB) return packToExtF80(signA, 0, 0);
+        return packToExtF80(signA, 0x7FFF, BX_CONST64(0x8000000000000000));
+    }
+    if (! expA) {
+        if (sigB && !expB) softfloat_raiseFlags(status, softfloat_flag_denormal);
+        if (! sigA) return a;
+        softfloat_raiseFlags(status, softfloat_flag_denormal);
+        normExpSig = softfloat_normSubnormalExtF80Sig(sigA);
+        expA = normExpSig.exp + 1;
+        sigA = normExpSig.sig;
+        if (expB < 0x3FFF)
+            return softfloat_normRoundPackToExtF80(signA, expA, sigA, 0, 80, status);
+    }
+    if (!expB) {
+        if (!sigB) return a;
+        softfloat_raiseFlags(status, softfloat_flag_denormal);
+        normExpSig = softfloat_normSubnormalExtF80Sig(sigB);
+        expB = normExpSig.exp + 1;
+        sigB = normExpSig.sig;
+    }
+
+    if (expB > 0x400E) {
+        /* generate appropriate overflow/underflow */
+        return softfloat_roundPackToExtF80(signA, signB ? -0x3FFF : 0x7FFF, sigA, 0, 80, status);
+    }
+
+    if (expB < 0x3FFF) return a;
+
+    int shiftCount = 0x403E - expB;
+    sigB >>= shiftCount;
+    int32_t scale = (int32_t) sigB;
+    if (signB) scale = -scale; /* -32768..32767 */
+
+    return softfloat_roundPackToExtF80(signA, expA + scale, sigA, 0, 80, status);
+}