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/f32_frc.c
+++ b/src/cpu/softfloat3e/f32_frc.c
@@ -0,0 +1,101 @@
+/*============================================================================
+
+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 <stdbool.h>
+#include <stdint.h>
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+/*----------------------------------------------------------------------------
+| Extracts the fractional portion of single-precision floating-point value `a',
+| and returns the result  as a  single-precision  floating-point value. The
+| fractional results are precise. The operation is performed according to the
+| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
+*----------------------------------------------------------------------------*/
+
+float32 f32_frc(float32 a, struct softfloat_status_t *status)
+{
+    int roundingMode = softfloat_getRoundingMode(status);
+
+    bool signA;
+    int16_t expA;
+    uint32_t sigA;
+    uint32_t lastBitMask;
+    uint32_t roundBitsMask;
+
+    signA = signF32UI(a);
+    expA  = expF32UI(a);
+    sigA  = fracF32UI(a);
+
+    if (expA == 0xFF) {
+        if (sigA) return softfloat_propagateNaNF32UI(a, 0, status);
+        softfloat_raiseFlags(status, softfloat_flag_invalid);
+        return defaultNaNF32UI;
+    }
+
+    if (expA >= 0x96) {
+        return packToF32UI(roundingMode == softfloat_round_down, 0, 0);
+    }
+
+    if (expA < 0x7F) {
+        if (! expA) {
+            if (! sigA || softfloat_denormalsAreZeros(status))
+                return packToF32UI(roundingMode == softfloat_round_down, 0, 0);
+
+            softfloat_raiseFlags(status, softfloat_flag_denormal);
+            if (! softfloat_isMaskedException(status, softfloat_flag_underflow))
+                softfloat_raiseFlags(status, softfloat_flag_underflow);
+
+            if (softfloat_flushUnderflowToZero(status)) {
+                softfloat_raiseFlags(status, softfloat_flag_underflow | softfloat_flag_inexact);
+                return packToF32UI(signA, 0, 0);
+            }
+        }
+        return a;
+    }
+
+    lastBitMask = 1 << (0x96 - expA);
+    roundBitsMask = lastBitMask - 1;
+
+    sigA &= roundBitsMask;
+    sigA <<= 7;
+    expA--;
+
+    if (! sigA)
+       return packToF32UI(roundingMode == softfloat_round_down, 0, 0);
+
+    return softfloat_normRoundPackToF32(signA, expA, sigA, status);
+}