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-rw-r--r--softfloat/f32_to_bf16.c41
-rw-r--r--softfloat/f64_to_bf16.c88
-rw-r--r--softfloat/softfloat.h1
-rw-r--r--softfloat/softfloat.mk.in1
4 files changed, 91 insertions, 40 deletions
diff --git a/softfloat/f32_to_bf16.c b/softfloat/f32_to_bf16.c
index 615f858..929def7 100644
--- a/softfloat/f32_to_bf16.c
+++ b/softfloat/f32_to_bf16.c
@@ -43,45 +43,6 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bfloat16_t f32_to_bf16( float32_t a )
{
- union ui32_f32 uA;
- uint_fast32_t uiA;
- bool sign;
- int_fast16_t exp;
- uint_fast32_t frac;
- struct commonNaN commonNaN;
- uint_fast16_t uiZ, frac16;
- union ui16_f16 uZ;
- /*------------------------------------------------------------------------
- *------------------------------------------------------------------------*/
- uA.f = a;
- uiA = uA.ui;
- sign = signF32UI( uiA );
- exp = expF32UI( uiA );
- frac = fracF32UI( uiA );
- /*------------------------------------------------------------------------
- *------------------------------------------------------------------------*/
- if ( exp == 0xFF ) {
- if ( frac ) {
- softfloat_f32UIToCommonNaN( uiA, &commonNaN );
- uiZ = softfloat_commonNaNToBF16UI( &commonNaN );
- } else {
- uiZ = packToBF16UI( sign, 0xFF, 0 );
- }
- goto uiZ;
- }
- /*------------------------------------------------------------------------
- *------------------------------------------------------------------------*/
- frac16 = frac>>9 | ((frac & 0x1FF) != 0);
- if ( ! (exp | frac16) ) {
- uiZ = packToBF16UI( sign, 0, 0 );
- goto uiZ;
- }
- /*------------------------------------------------------------------------
- *------------------------------------------------------------------------*/
- return softfloat_roundPackToBF16( sign, exp - 1, frac16 | 0x4000 );
- uiZ:
- uZ.ui = uiZ;
- return uZ.f;
-
+ return f64_to_bf16( f32_to_f64( a ) );
}
diff --git a/softfloat/f64_to_bf16.c b/softfloat/f64_to_bf16.c
new file mode 100644
index 0000000..d99d5e4
--- /dev/null
+++ b/softfloat/f64_to_bf16.c
@@ -0,0 +1,88 @@
+
+/*============================================================================
+
+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 <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+bfloat16_t f64_to_bf16( float64_t a )
+{
+ union ui64_f64 uA;
+ uint_fast64_t uiA;
+ bool sign;
+ int_fast16_t exp;
+ uint_fast64_t frac;
+ struct commonNaN commonNaN;
+ uint_fast16_t uiZ, frac16;
+ union ui16_f16 uZ;
+
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ uA.f = a;
+ uiA = uA.ui;
+ sign = signF64UI( uiA );
+ exp = expF64UI( uiA );
+ frac = fracF64UI( uiA );
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ if ( exp == 0x7FF ) {
+ if ( frac ) {
+ softfloat_f64UIToCommonNaN( uiA, &commonNaN );
+ uiZ = softfloat_commonNaNToBF16UI( &commonNaN );
+ } else {
+ uiZ = packToBF16UI( sign, 0xFF, 0 );
+ }
+ goto uiZ;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ frac16 = softfloat_shortShiftRightJam64( frac, 38 );
+ if ( ! (exp | frac16) ) {
+ uiZ = packToBF16UI( sign, 0, 0 );
+ goto uiZ;
+ }
+ /*------------------------------------------------------------------------
+ *------------------------------------------------------------------------*/
+ return softfloat_roundPackToBF16( sign, exp - 0x381, frac16 | 0x4000 );
+ uiZ:
+ uZ.ui = uiZ;
+ return uZ.f;
+
+}
+
diff --git a/softfloat/softfloat.h b/softfloat/softfloat.h
index eb78d74..17b6b2c 100644
--- a/softfloat/softfloat.h
+++ b/softfloat/softfloat.h
@@ -238,6 +238,7 @@ uint_fast64_t f64_to_ui64_r_minMag( float64_t, bool );
int_fast32_t f64_to_i32_r_minMag( float64_t, bool );
int_fast64_t f64_to_i64_r_minMag( float64_t, bool );
float16_t f64_to_f16( float64_t );
+bfloat16_t f64_to_bf16( float64_t );
float32_t f64_to_f32( float64_t );
#ifdef SOFTFLOAT_FAST_INT64
extFloat80_t f64_to_extF80( float64_t );
diff --git a/softfloat/softfloat.mk.in b/softfloat/softfloat.mk.in
index 9c780ac..14ff6c5 100644
--- a/softfloat/softfloat.mk.in
+++ b/softfloat/softfloat.mk.in
@@ -107,6 +107,7 @@ softfloat_c_srcs = \
f64_sqrt.c \
f64_sub.c \
f64_to_f128.c \
+ f64_to_bf16.c \
f64_to_f16.c \
f64_to_f32.c \
f64_to_i32.c \
generated by cgit v1.1 at 2024-11-16 19:53:34 +0000