ext: Add SoftFloat Library to ext directory
This patch adds Softfloat library for supporting RISCV
float operation implement.
Using SoftFloat Package to reinplement Riscv FPops.
Jira Issue: https://gem5.atlassian.net/browse/GEM5-373
Change-Id: Ic96e6c8adec0713bdbd744d581c750034b88246c
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/39357
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/ext/softfloat/s_compare128M.c b/ext/softfloat/s_compare128M.c
new file mode 100644
index 0000000..7bba6bb
--- /dev/null
+++ b/ext/softfloat/s_compare128M.c
@@ -0,0 +1,63 @@
+
+/*============================================================================
+
+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 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 <stdint.h>
+
+#include "platform.h"
+#include "primitiveTypes.h"
+
+#ifndef softfloat_compare128M
+
+int_fast8_t softfloat_compare128M( const uint32_t *aPtr, const uint32_t *bPtr )
+{
+ unsigned int index, lastIndex;
+ uint32_t wordA, wordB;
+
+ index = indexWordHi( 4 );
+ lastIndex = indexWordLo( 4 );
+ for (;;) {
+ wordA = aPtr[index];
+ wordB = bPtr[index];
+ if ( wordA != wordB ) return (wordA < wordB) ? -1 : 1;
+ if ( index == lastIndex ) break;
+ index -= wordIncr;
+ }
+ return 0;
+
+}
+
+#endif
+
