6 files changed, 123 insertions, 0 deletions
diff --git a/source/RISCV/specialize.h b/source/RISCV/specialize.h
index c638264..70fb808 100644
--- a/source/RISCV/specialize.h
+++ b/source/RISCV/specialize.h
@@ -88,6 +88,13 @@ struct commonNaN { char _unused; };
 #define softfloat_isSigNaNF16UI( uiA ) ((((uiA) & 0x7E00) == 0x7C00) && ((uiA) & 0x01FF))
 
 /*----------------------------------------------------------------------------
+| Returns true when 16-bit unsigned integer 'uiA' has the bit pattern of a
+| 16-bit brain floating-point (BF16) signaling NaN.
+| Note:  This macro evaluates its argument more than once.
+*----------------------------------------------------------------------------*/
+#define softfloat_isSigNaNBF16UI( uiA ) ((((uiA) & 0x7FC0) == 0x7F80) && ((uiA) & 0x003F))
+
+/*----------------------------------------------------------------------------
 | Assuming 'uiA' has the bit pattern of a 16-bit floating-point NaN, converts
 | this NaN to the common NaN form, and stores the resulting common NaN at the
 | location pointed to by 'zPtr'.  If the NaN is a signaling NaN, the invalid
diff --git a/source/bf16_isSignalingNaN.c b/source/bf16_isSignalingNaN.c
new file mode 100644
index 0000000..79ca87f
--- /dev/null
+++ b/source/bf16_isSignalingNaN.c
@@ -0,0 +1,51 @@
+
+/*============================================================================
+
+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 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 "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+bool bf16_isSignalingNaN( bfloat16_t a )
+{
+    union ui16_bf16 uA;
+
+    uA.f = a;
+    return softfloat_isSigNaNBF16UI( uA.ui );
+
+}
+
diff --git a/source/bf16_to_f32.c b/source/bf16_to_f32.c
new file mode 100644
index 0000000..175d0d4
--- /dev/null
+++ b/source/bf16_to_f32.c
@@ -0,0 +1,56 @@
+
+/*============================================================================
+
+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 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"
+
+float32_t bf16_to_f32( bfloat16_t a )
+{
+    union ui16_bf16 uA;
+    union ui32_f32 uZ;
+
+    /*------------------------------------------------------------------------
+    *------------------------------------------------------------------------*/
+    uA.f = a;
+    uZ.ui = (uint32_t) uA.ui << 16;
+    return uZ.f;
+
+}
+
diff --git a/source/include/internals.h b/source/include/internals.h
index f8eac05..ccd7747 100644
--- a/source/include/internals.h
+++ b/source/include/internals.h
@@ -43,6 +43,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "softfloat_types.h"
 
 union ui16_f16 { uint16_t ui; float16_t f; };
+union ui16_bf16 { uint16_t ui; bfloat16_t f; };
 union ui32_f32 { uint32_t ui; float32_t f; };
 union ui64_f64 { uint64_t ui; float64_t f; };
 
diff --git a/source/include/softfloat.h b/source/include/softfloat.h
index 9ed17c1..c1757b8 100644
--- a/source/include/softfloat.h
+++ b/source/include/softfloat.h
@@ -170,6 +170,13 @@ bool f16_lt_quiet( float16_t, float16_t );
 bool f16_isSignalingNaN( float16_t );
 
 /*----------------------------------------------------------------------------
+| 16-bit (brain float 16) floating-point operations.
+*----------------------------------------------------------------------------*/
+float32_t bf16_to_f32( bfloat16_t );
+bfloat16_t f32_to_bf16( float32_t );
+bool bf16_isSignalingNaN( bfloat16_t );
+
+/*----------------------------------------------------------------------------
 | 32-bit (single-precision) floating-point operations.
 *----------------------------------------------------------------------------*/
 uint_fast32_t f32_to_ui32( float32_t, uint_fast8_t, bool );
diff --git a/source/include/softfloat_types.h b/source/include/softfloat_types.h
index b92d246..25039b5 100644
--- a/source/include/softfloat_types.h
+++ b/source/include/softfloat_types.h
@@ -48,6 +48,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 | (typically 'float' and 'double', and possibly 'long double').
 *----------------------------------------------------------------------------*/
 typedef struct { uint16_t v; } float16_t;
+typedef struct { uint16_t v; } bfloat16_t;
 typedef struct { uint32_t v; } float32_t;
 typedef struct { uint64_t v; } float64_t;
 typedef struct { uint64_t v[2]; } float128_t;