-\r
-#include <stdbool.h>\r
-#include <stdint.h>\r
-#include "platform.h"\r
-#include "primitives.h"\r
-#include "internals.h"\r
-#include "specialize.h"\r
-\r
-float32_t\r
- softfloat_addMagsF32( uint_fast32_t uiA, uint_fast32_t uiB, bool signZ )\r
-{\r
- int_fast16_t expA;\r
- uint_fast32_t sigA;\r
- int_fast16_t expB;\r
- uint_fast32_t sigB;\r
- int_fast16_t expDiff;\r
- uint_fast32_t uiZ;\r
- int_fast16_t expZ;\r
- uint_fast32_t sigZ;\r
- union ui32_f32 uZ;\r
-\r
- expA = expF32UI( uiA );\r
- sigA = fracF32UI( uiA );\r
- expB = expF32UI( uiB );\r
- sigB = fracF32UI( uiB );\r
- expDiff = expA - expB;\r
- sigA <<= 6;\r
- sigB <<= 6;\r
- if ( ! expDiff ) {\r
- if ( expA == 0xFF ) {\r
- if ( sigA | sigB ) goto propagateNaN;\r
- uiZ = uiA;\r
- goto uiZ;\r
- }\r
- if ( ! expA ) {\r
- uiZ = packToF32UI( signZ, 0, ( uiA + uiB ) & 0x7FFFFFFF );\r
- goto uiZ;\r
- }\r
- expZ = expA;\r
- sigZ = 0x40000000 + sigA + sigB;\r
- } else {\r
- if ( expDiff < 0 ) {\r
- if ( expB == 0xFF ) {\r
- if ( sigB ) goto propagateNaN;\r
- uiZ = packToF32UI( signZ, 0xFF, 0 );\r
- goto uiZ;\r
- }\r
- expZ = expB;\r
- sigA += expA ? 0x20000000 : sigA;\r
- sigA = softfloat_shift32RightJam( sigA, - expDiff );\r
- } else {\r
- if ( expA == 0xFF ) {\r
- if ( sigA ) goto propagateNaN;\r
- uiZ = uiA;\r
- goto uiZ;\r
- }\r
- expZ = expA;\r
- sigB += expB ? 0x20000000 : sigB;\r
- sigB = softfloat_shift32RightJam( sigB, expDiff );\r
- }\r
- sigZ = 0x20000000 + sigA + sigB;\r
- if ( sigZ < 0x40000000 ) {\r
- --expZ;\r
- sigZ <<= 1;\r
- }\r
- }\r
- return softfloat_roundPackToF32( signZ, expZ, sigZ );\r
- propagateNaN:\r
- uiZ = softfloat_propagateNaNF32UI( uiA, uiB );\r
- uiZ:\r
- uZ.ui = uiZ;\r
- return uZ.f;\r
-\r
-}\r
-\r
+
+/*============================================================================
+
+This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
+Package, Release 3d, 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"
+
+float32_t softfloat_addMagsF32( uint_fast32_t uiA, uint_fast32_t uiB )
+{
+ int_fast16_t expA;
+ uint_fast32_t sigA;
+ int_fast16_t expB;
+ uint_fast32_t sigB;
+ int_fast16_t expDiff;
+ uint_fast32_t uiZ;
+ bool signZ;
+ int_fast16_t expZ;
+ uint_fast32_t sigZ;
+ union ui32_f32 uZ;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expA = expF32UI( uiA );
+ sigA = fracF32UI( uiA );
+ expB = expF32UI( uiB );
+ sigB = fracF32UI( uiB );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ expDiff = expA - expB;
+ if ( ! expDiff ) {
+ /*--------------------------------------------------------------------
+ *--------------------------------------------------------------------*/
+ if ( ! expA ) {
+ uiZ = uiA + sigB;
+ goto uiZ;
+ }
+ if ( expA == 0xFF ) {
+ if ( sigA | sigB ) goto propagateNaN;
+ uiZ = uiA;
+ goto uiZ;
+ }
+ signZ = signF32UI( uiA );
+ expZ = expA;
+ sigZ = 0x01000000 + sigA + sigB;
+ if ( ! (sigZ & 1) && (expZ < 0xFE) ) {
+ uiZ = packToF32UI( signZ, expZ, sigZ>>1 );
+ goto uiZ;
+ }
+ sigZ <<= 6;
+ } else {
+ /*--------------------------------------------------------------------
+ *--------------------------------------------------------------------*/
+ signZ = signF32UI( uiA );
+ sigA <<= 6;
+ sigB <<= 6;
+ if ( expDiff < 0 ) {
+ if ( expB == 0xFF ) {
+ if ( sigB ) goto propagateNaN;
+ uiZ = packToF32UI( signZ, 0xFF, 0 );
+ goto uiZ;
+ }
+ expZ = expB;
+ sigA += expA ? 0x20000000 : sigA;
+ sigA = softfloat_shiftRightJam32( sigA, -expDiff );
+ } else {
+ if ( expA == 0xFF ) {
+ if ( sigA ) goto propagateNaN;
+ uiZ = uiA;
+ goto uiZ;
+ }
+ expZ = expA;
+ sigB += expB ? 0x20000000 : sigB;
+ sigB = softfloat_shiftRightJam32( sigB, expDiff );
+ }
+ sigZ = 0x20000000 + sigA + sigB;
+ if ( sigZ < 0x40000000 ) {
+ --expZ;
+ sigZ <<= 1;
+ }
+ }
+ return softfloat_roundPackToF32( signZ, expZ, sigZ );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ propagateNaN:
+ uiZ = softfloat_propagateNaNF32UI( uiA, uiB );
+ uiZ:
+ uZ.ui = uiZ;
+ return uZ.f;
+
+}
+
projects / riscv-isa-sim.git / blobdiff