1 files changed, 139 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/softfloat/source/s_subMagsF128.c b/lib/libutils/isoc/arch/arm/softfloat/source/s_subMagsF128.c
new file mode 100644
index 0000000..c0dfeeb
--- /dev/null
+++ b/lib/libutils/isoc/arch/arm/softfloat/source/s_subMagsF128.c
@@ -0,0 +1,139 @@
+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3a, by John R. Hauser.
+
+Copyright 2011, 2012, 2013, 2014 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"
+
+float128_t
+ softfloat_subMagsF128(
+     uint_fast64_t uiA64,
+     uint_fast64_t uiA0,
+     uint_fast64_t uiB64,
+     uint_fast64_t uiB0,
+     bool signZ
+ )
+{
+    int_fast32_t expA;
+    struct uint128 sigA;
+    int_fast32_t expB;
+    struct uint128 sigB, sigZ;
+    int_fast32_t expDiff, expZ;
+    struct uint128 uiZ;
+    union ui128_f128 uZ;
+
+    expA = expF128UI64( uiA64 );
+    sigA.v64 = fracF128UI64( uiA64 );
+    sigA.v0  = uiA0;
+    expB = expF128UI64( uiB64 );
+    sigB.v64 = fracF128UI64( uiB64 );
+    sigB.v0  = uiB0;
+    sigA = softfloat_shortShiftLeft128( sigA.v64, sigA.v0, 4 );
+    sigB = softfloat_shortShiftLeft128( sigB.v64, sigB.v0, 4 );
+    expDiff = expA - expB;
+    if ( 0 < expDiff ) goto expABigger;
+    if ( expDiff < 0 ) goto expBBigger;
+    if ( expA == 0x7FFF ) {
+        if ( sigA.v64 | sigA.v0 | sigB.v64 | sigB.v0 ) goto propagateNaN;
+        softfloat_raiseFlags( softfloat_flag_invalid );
+        uiZ.v64 = defaultNaNF128UI64;
+        uiZ.v0  = defaultNaNF128UI0;
+        goto uiZ;
+    }
+    expZ = expA;
+    if ( ! expZ ) expZ = 1;
+    if ( sigB.v64 < sigA.v64 ) goto aBigger;
+    if ( sigA.v64 < sigB.v64 ) goto bBigger;
+    if ( sigB.v0 < sigA.v0 ) goto aBigger;
+    if ( sigA.v0 < sigB.v0 ) goto bBigger;
+    uiZ.v64 =
+        packToF128UI64(
+            (softfloat_roundingMode == softfloat_round_min), 0, 0 );
+    uiZ.v0 = 0;
+    goto uiZ;
+ expBBigger:
+    if ( expB == 0x7FFF ) {
+        if ( sigB.v64 | sigB.v0 ) goto propagateNaN;
+        uiZ.v64 = packToF128UI64( signZ ^ 1, 0x7FFF, 0 );
+        uiZ.v0  = 0;
+        goto uiZ;
+    }
+    if ( expA ) {
+        sigA.v64 |= UINT64_C( 0x0010000000000000 );
+    } else {
+        ++expDiff;
+        if ( ! expDiff ) goto newlyAlignedBBigger;
+    }
+    sigA = softfloat_shiftRightJam128( sigA.v64, sigA.v0, -expDiff );
+ newlyAlignedBBigger:
+    expZ = expB;
+    sigB.v64 |= UINT64_C( 0x0010000000000000 );
+ bBigger:
+    signZ ^= 1;
+    sigZ = softfloat_sub128( sigB.v64, sigB.v0, sigA.v64, sigA.v0 );
+    goto normRoundPack;
+ expABigger:
+    if ( expA == 0x7FFF ) {
+        if ( sigA.v64 | sigA.v0 ) goto propagateNaN;
+        uiZ.v64 = uiA64;
+        uiZ.v0  = uiA0;
+        goto uiZ;
+    }
+    if ( expB ) {
+        sigB.v64 |= UINT64_C( 0x0010000000000000 );
+    } else {
+        --expDiff;
+        if ( ! expDiff ) goto newlyAlignedABigger;
+    }
+    sigB = softfloat_shiftRightJam128( sigB.v64, sigB.v0, expDiff );
+ newlyAlignedABigger:
+    expZ = expA;
+    sigA.v64 |= UINT64_C( 0x0010000000000000 );
+ aBigger:
+    sigZ = softfloat_sub128( sigA.v64, sigA.v0, sigB.v64, sigB.v0 );
+ normRoundPack:
+    return softfloat_normRoundPackToF128( signZ, expZ - 5, sigZ.v64, sigZ.v0 );
+ propagateNaN:
+    uiZ = softfloat_propagateNaNF128UI( uiA64, uiA0, uiB64, uiB0 );
+ uiZ:
+    uZ.ui = uiZ;
+    return uZ.f;
+
+}
+