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/f16_roundToInt.c
+++ b/src/cpu/softfloat3e/f16_roundToInt.c
@@ -0,0 +1,112 @@
+/*============================================================================
+
+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, 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 <stdbool.h>
+#include <stdint.h>
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+float16 f16_roundToInt(float16 a, uint8_t scale, uint8_t roundingMode, bool exact, struct softfloat_status_t *status)
+{
+    int8_t exp;
+    uint16_t frac;
+    bool sign;
+    uint16_t uiZ, lastBitMask, roundBitsMask;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    scale &= 0xF;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    exp = expF16UI(a);
+    frac = fracF16UI(a);
+    sign = signF16UI(a);
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (0x19 <= (exp + scale)) {
+        if ((exp == 0x1F) && frac) {
+            return softfloat_propagateNaNF16UI(a, 0, status);
+        }
+        return a;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (softfloat_denormalsAreZeros(status)) {
+        if (!exp) {
+            frac = 0;
+            a = packToF16UI(sign, 0, 0);
+        }
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if ((exp + scale) <= 0xE) {
+        if (!(exp | frac)) return a;
+        if (exact) softfloat_raiseFlags(status, softfloat_flag_inexact);
+        uiZ = packToF16UI(sign, 0, 0);
+        switch (roundingMode) {
+         case softfloat_round_near_even:
+            if (!frac) break;
+         case softfloat_round_near_maxMag:
+            if ((exp + scale) == 0xE) uiZ |= packToF16UI(0, 0xF - scale, 0);
+            break;
+         case softfloat_round_min:
+            if (uiZ) uiZ = packToF16UI(1, 0xF - scale, 0);
+            break;
+         case softfloat_round_max:
+            if (!uiZ) uiZ = packToF16UI(0, 0xF - scale, 0);
+            break;
+        }
+        return uiZ;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uiZ = a;
+    lastBitMask = (uint16_t) 1<<(0x19 - exp - scale);
+    roundBitsMask = lastBitMask - 1;
+    if (roundingMode == softfloat_round_near_maxMag) {
+        uiZ += lastBitMask>>1;
+    } else if (roundingMode == softfloat_round_near_even) {
+        uiZ += lastBitMask>>1;
+        if (!(uiZ & roundBitsMask)) uiZ &= ~lastBitMask;
+    } else if (roundingMode == (signF16UI(uiZ) ? softfloat_round_min : softfloat_round_max)) {
+        uiZ += roundBitsMask;
+    }
+    uiZ &= ~roundBitsMask;
+    if (uiZ != a) {
+        if (exact) softfloat_raiseFlags(status, softfloat_flag_inexact);
+    }
+    return uiZ;
+}