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-rw-r--r--[-rwxr-xr-x]softfloat/s_addMagsF32.c201
1 files changed, 125 insertions, 76 deletions
diff --git a/softfloat/s_addMagsF32.c b/softfloat/s_addMagsF32.c
index c968bc6..ed85bb0 100755..100644
--- a/softfloat/s_addMagsF32.c
+++ b/softfloat/s_addMagsF32.c
@@ -1,77 +1,126 @@
-// See LICENSE.SoftFloat for license details.
-
-#include <stdbool.h>
-#include <stdint.h>
-#include "platform.h"
-#include "primitives.h"
-#include "internals.h"
-#include "specialize.h"
-
-float32_t
- softfloat_addMagsF32( uint_fast32_t uiA, uint_fast32_t uiB, bool signZ )
-{
- 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_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;
- sigA <<= 6;
- sigB <<= 6;
- if ( ! expDiff ) {
- if ( expA == 0xFF ) {
- if ( sigA | sigB ) goto propagateNaN;
- uiZ = uiA;
- goto uiZ;
- }
- if ( ! expA ) {
- uiZ = packToF32UI( signZ, 0, ( uiA + uiB ) & 0x7FFFFFFF );
- goto uiZ;
- }
- expZ = expA;
- sigZ = 0x40000000 + sigA + sigB;
- } else {
- 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_shift32RightJam( sigA, - expDiff );
- } else {
- if ( expA == 0xFF ) {
- if ( sigA ) goto propagateNaN;
- uiZ = uiA;
- goto uiZ;
- }
- expZ = expA;
- sigB += expB ? 0x20000000 : sigB;
- sigB = softfloat_shift32RightJam( 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;
-
-}
-
+/*============================================================================
+
+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"
+
+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;
+
+}
+
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