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/s_roundPackToF32.c
+++ b/src/cpu/softfloat3e/s_roundPackToF32.c
@@ -0,0 +1,108 @@
+/*============================================================================
+
+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 <stdint.h>
+#include "internals.h"
+#include "primitives.h"
+#include "softfloat.h"
+
+float32 softfloat_roundPackToF32(bool sign, int16_t exp, uint32_t sig, struct softfloat_status_t *status)
+{
+    uint8_t roundingMode;
+    bool roundNearEven;
+    uint8_t roundIncrement, roundBits;
+    bool isTiny;
+    uint32_t uiZ;
+    uint32_t sigRef;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    roundingMode = softfloat_getRoundingMode(status);
+    roundNearEven = (roundingMode == softfloat_round_near_even);
+    roundIncrement = 0x40;
+    if (! roundNearEven && (roundingMode != softfloat_round_near_maxMag)) {
+        roundIncrement =
+            (roundingMode == (sign ? softfloat_round_min : softfloat_round_max)) ? 0x7F : 0;
+    }
+    roundBits = sig & 0x7F;
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (0xFD <= (unsigned int) exp) {
+        if (exp < 0) {
+            /*----------------------------------------------------------------
+            *----------------------------------------------------------------*/
+            isTiny = (exp < -1) || (sig + roundIncrement < 0x80000000);
+            if (isTiny && ! softfloat_isMaskedException(status, softfloat_flag_underflow)) {
+                softfloat_raiseFlags(status, softfloat_flag_underflow);
+                exp += 192;
+            }
+            else {
+                sig = softfloat_shiftRightJam32(sig, -exp);
+                exp = 0;
+                roundBits = sig & 0x7F;
+                if (isTiny) {
+                    if (softfloat_flushUnderflowToZero(status)) {
+                        softfloat_raiseFlags(status, softfloat_flag_underflow | softfloat_flag_inexact);
+                        return packToF32UI(sign, 0, 0);
+                    }
+                    if (roundBits) softfloat_raiseFlags(status, softfloat_flag_underflow);
+                }
+            }
+        } else if ((0xFD < exp) || (0x80000000 <= sig + roundIncrement)) {
+            /*----------------------------------------------------------------
+            *----------------------------------------------------------------*/
+            softfloat_raiseFlags(status, softfloat_flag_overflow);
+            if (roundBits || softfloat_isMaskedException(status, softfloat_flag_overflow)) {
+                softfloat_raiseFlags(status, softfloat_flag_inexact);
+                if (roundIncrement != 0) softfloat_setRoundingUp(status);
+            }
+            uiZ = packToF32UI(sign, 0xFF, 0) - ! roundIncrement;
+            return uiZ;
+        }
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    sigRef = sig;
+    sig = (sig + roundIncrement)>>7;
+    sig &= ~(uint32_t) (! (roundBits ^ 0x40) & roundNearEven);
+    if (! sig) exp = 0;
+    if (roundBits) {
+        softfloat_raiseFlags(status, softfloat_flag_inexact);
+        if ((sig << 7) > sigRef) softfloat_setRoundingUp(status);
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    return packToF32UI(sign, exp, sig);
+}