1 files changed, 143 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/s_subMagsF32.c b/src/libs/softfloat-3e/source/s_subMagsF32.c
new file mode 100644
index 00000000..fc8eb0c7
--- /dev/null
+++ b/src/libs/softfloat-3e/source/s_subMagsF32.c
@@ -0,0 +1,143 @@
+
+/*============================================================================
+
+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 "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+float32_t softfloat_subMagsF32( uint_fast32_t uiA, uint_fast32_t uiB SOFTFLOAT_STATE_DECL_COMMA )
+{
+    int_fast16_t expA;
+    uint_fast32_t sigA;
+    int_fast16_t expB;
+    uint_fast32_t sigB;
+    int_fast16_t expDiff;
+    uint_fast32_t uiZ;
+    int_fast32_t sigDiff;
+    bool signZ;
+    int_fast8_t shiftDist;
+    int_fast16_t expZ;
+    uint_fast32_t sigX, sigY;
+    union ui32_f32 uZ;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    expA = expF32UI( uiA );
+    sigA = fracF32UI( uiA );
+    expB = expF32UI( uiB );
+    sigB = fracF32UI( uiB );
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    expDiff = expA - expB;
+    if ( ! expDiff ) {
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        if ( expA == 0xFF ) {
+            if ( sigA | sigB ) goto propagateNaN;
+            softfloat_raiseFlags( softfloat_flag_invalid SOFTFLOAT_STATE_ARG_COMMA );
+            uiZ = defaultNaNF32UI;
+            goto uiZ;
+        }
+        sigDiff = sigA - sigB;
+        if ( ! sigDiff ) {
+            uiZ =
+                packToF32UI(
+                    (softfloat_roundingMode == softfloat_round_min), 0, 0 );
+            goto uiZ;
+        }
+        if ( expA ) --expA;
+        signZ = signF32UI( uiA );
+        if ( sigDiff < 0 ) {
+            signZ = ! signZ;
+            sigDiff = -sigDiff;
+        }
+        shiftDist = softfloat_countLeadingZeros32( sigDiff ) - 8;
+        expZ = expA - shiftDist;
+        if ( expZ < 0 ) {
+            shiftDist = expA;
+            expZ = 0;
+        }
+        uiZ = packToF32UI( signZ, expZ, sigDiff<<shiftDist );
+        goto uiZ;
+    } else {
+        /*--------------------------------------------------------------------
+        *--------------------------------------------------------------------*/
+        signZ = signF32UI( uiA );
+        sigA <<= 7;
+        sigB <<= 7;
+        if ( expDiff < 0 ) {
+            /*----------------------------------------------------------------
+            *----------------------------------------------------------------*/
+            signZ = ! signZ;
+            if ( expB == 0xFF ) {
+                if ( sigB ) goto propagateNaN;
+                uiZ = packToF32UI( signZ, 0xFF, 0 );
+                goto uiZ;
+            }
+            expZ = expB - 1;
+            sigX = sigB | 0x40000000;
+            sigY = sigA + (expA ? 0x40000000 : sigA);
+            expDiff = -expDiff;
+        } else {
+            /*----------------------------------------------------------------
+            *----------------------------------------------------------------*/
+            if ( expA == 0xFF ) {
+                if ( sigA ) goto propagateNaN;
+                uiZ = uiA;
+                goto uiZ;
+            }
+            expZ = expA - 1;
+            sigX = sigA | 0x40000000;
+            sigY = sigB + (expB ? 0x40000000 : sigB);
+        }
+        return
+            softfloat_normRoundPackToF32(
+                signZ, expZ, sigX - softfloat_shiftRightJam32( sigY, expDiff ) SOFTFLOAT_STATE_ARG_COMMA
+            );
+    }
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+ propagateNaN:
+    uiZ = softfloat_propagateNaNF32UI( uiA, uiB SOFTFLOAT_STATE_ARG_COMMA );
+ uiZ:
+    uZ.ui = uiZ;
+    return uZ.f;
+
+}
+