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_roundToInt.cc
+++ b/src/cpu/softfloat3e/extF80_roundToInt.cc
@@ -0,0 +1,123 @@
+/*============================================================================
+
+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, 2017 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"
+
+extFloat80_t
+ extF80_roundToInt(extFloat80_t a, uint8_t roundingMode, bool exact, struct softfloat_status_t *status)
+{
+    uint16_t uiA64, signUI64;
+    int32_t exp;
+    uint64_t sigA;
+    uint16_t uiZ64;
+    uint64_t sigZ;
+    uint64_t lastBitMask, roundBitsMask;
+
+    // handle unsupported extended double-precision floating encodings
+    if (extF80_isUnsupported(a)) {
+        softfloat_raiseFlags(status, softfloat_flag_invalid);
+        return packToExtF80_twoargs(defaultNaNExtF80UI64, defaultNaNExtF80UI0);
+    }
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uiA64 = a.signExp;
+    signUI64 = uiA64 & packToExtF80UI64(1, 0);
+    exp = expExtF80UI64(uiA64);
+    sigA = a.signif;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (0x403E <= exp) {
+        if ((exp == 0x7FFF) && (uint64_t) (sigA<<1)) {
+            return softfloat_propagateNaNExtF80UI(uiA64, sigA, 0, 0, status);
+        }
+        return a;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (exp <= 0x3FFE) {
+        if (! exp) {
+            if ((sigA<<1) == 0) return a;
+            softfloat_raiseFlags(status, softfloat_flag_denormal);
+        }
+        if (exact) softfloat_raiseFlags(status, softfloat_flag_inexact);
+        switch (roundingMode) {
+         case softfloat_round_near_even:
+            if (!(sigA & UINT64_C(0x7FFFFFFFFFFFFFFF))) break;
+         case softfloat_round_near_maxMag:
+            if (exp == 0x3FFE) goto mag1;
+            break;
+         case softfloat_round_min:
+            if (signUI64) goto mag1;
+            break;
+         case softfloat_round_max:
+            if (!signUI64) goto mag1;
+            break;
+        }
+        return packToExtF80(signUI64, 0, 0);
+     mag1:
+        softfloat_setRoundingUp(status);
+        return packToExtF80(signUI64, 0x3FFF, UINT64_C(0x8000000000000000));
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uiZ64 = signUI64 | exp;
+    lastBitMask = (uint64_t) 1<<(0x403E - exp);
+    roundBitsMask = lastBitMask - 1;
+    sigZ = sigA;
+    if (roundingMode == softfloat_round_near_maxMag) {
+        sigZ += lastBitMask>>1;
+    } else if (roundingMode == softfloat_round_near_even) {
+        sigZ += lastBitMask>>1;
+        if (!(sigZ & roundBitsMask)) sigZ &= ~lastBitMask;
+    } else if (roundingMode == (signUI64 ? softfloat_round_min : softfloat_round_max)) {
+        sigZ += roundBitsMask;
+    }
+    sigZ &= ~roundBitsMask;
+    if (!sigZ) {
+        ++uiZ64;
+        sigZ = UINT64_C(0x8000000000000000);
+        softfloat_setRoundingUp(status);
+    }
+    if (sigZ != sigA) {
+        if (exact) softfloat_raiseFlags(status, softfloat_flag_inexact);
+        if (sigZ > sigA)
+            softfloat_setRoundingUp(status);
+    }
+    return packToExtF80_twoargs(uiZ64, sigZ);
+}