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author arbee <rb6502@users.noreply.github.com>2018-05-13 19:52:33 -0400
committer arbee <rb6502@users.noreply.github.com>2018-05-13 19:52:33 -0400
commit62be291842be67be394942ca6ec8fa835dac858e (patch)
tree8ccd05b60ddb376c73008567794fa500fbbd5783 /3rdparty/softfloat3/source/f64_to_i32_r_minMag.c
parenta65fccc1f54f4aba9324e97a26f919d5fa1a244b (diff)
Initial import of SoftFloat release 3E [R. Belmont]
This is a pre-usage import so everyone can get things in line for various compilers. GCC/Clang should be OK on most targets as-is; MSVC may need to edit 3rdparty/softfloat3/build/MAME/build.h to conform. Please report failure/success with various compilers.
Diffstat (limited to '3rdparty/softfloat3/source/f64_to_i32_r_minMag.c')
-rw-r--r--3rdparty/softfloat3/source/f64_to_i32_r_minMag.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/3rdparty/softfloat3/source/f64_to_i32_r_minMag.c b/3rdparty/softfloat3/source/f64_to_i32_r_minMag.c
new file mode 100644
index 00000000000..8cccb8efdea
--- /dev/null
+++ b/3rdparty/softfloat3/source/f64_to_i32_r_minMag.c
@@ -0,0 +1,96 @@
+
+/*============================================================================
+
+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"
+
+int_fast32_t f64_to_i32_r_minMag( float64_t a, bool exact )
+{
+ union ui64_f64 uA;
+ uint_fast64_t uiA;
+ int_fast16_t exp;
+ uint_fast64_t sig;
+ int_fast16_t shiftDist;
+ bool sign;
+ int_fast32_t absZ;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uA.f = a;
+ uiA = uA.ui;
+ exp = expF64UI( uiA );
+ sig = fracF64UI( uiA );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ shiftDist = 0x433 - exp;
+ if ( 53 <= shiftDist ) {
+ if ( exact && (exp | sig) ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ return 0;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ sign = signF64UI( uiA );
+ if ( shiftDist < 22 ) {
+ if (
+ sign && (exp == 0x41E) && (sig < UINT64_C( 0x0000000000200000 ))
+ ) {
+ if ( exact && sig ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ return -0x7FFFFFFF - 1;
+ }
+ softfloat_raiseFlags( softfloat_flag_invalid );
+ return
+ (exp == 0x7FF) && sig ? i32_fromNaN
+ : sign ? i32_fromNegOverflow : i32_fromPosOverflow;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ sig |= UINT64_C( 0x0010000000000000 );
+ absZ = sig>>shiftDist;
+ if ( exact && ((uint_fast64_t) (uint_fast32_t) absZ<<shiftDist != sig) ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ return sign ? -absZ : absZ;
+
+}
+