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/f64_to_f128.cc
+++ b/src/cpu/softfloat3e/f64_to_f128.cc
@@ -0,0 +1,89 @@
+/*============================================================================
+
+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 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 "primitives.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+float128_t f64_to_f128(float64 a, struct softfloat_status_t *status)
+{
+    bool sign;
+    int16_t exp;
+    uint64_t frac;
+    struct commonNaN commonNaN;
+    struct uint128 uiZ;
+    struct exp16_sig64 normExpSig;
+    struct uint128 frac128;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    sign = signF64UI(a);
+    exp  = expF64UI(a);
+    frac = fracF64UI(a);
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (exp == 0x7FF) {
+        if (frac) {
+            softfloat_f64UIToCommonNaN(a, &commonNaN, status);
+            uiZ = softfloat_commonNaNToF128UI(&commonNaN);
+        } else {
+            uiZ.v64 = packToF128UI64(sign, 0x7FFF, 0);
+            uiZ.v0  = 0;
+        }
+        return uiZ;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    if (! exp) {
+        if (! frac) {
+            uiZ.v64 = packToF128UI64(sign, 0, 0);
+            uiZ.v0  = 0;
+            return uiZ;
+        }
+        softfloat_raiseFlags(status, softfloat_flag_denormal);
+        normExpSig = softfloat_normSubnormalF64Sig(frac);
+        exp = normExpSig.exp - 1;
+        frac = normExpSig.sig;
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    frac128 = softfloat_shortShiftLeft128(0, frac, 60);
+    uiZ.v64 = packToF128UI64(sign, exp + 0x3C00, frac128.v64);
+    uiZ.v0  = frac128.v0;
+    return uiZ;
+}