From 1172fb3e0acf7be0fbc8558ce8557c98e3b40f89 Mon Sep 17 00:00:00 2001 From: Nicolas Brunie Date: Tue, 19 Sep 2023 12:54:43 -0700 Subject: Adding support for BF16 / BF16 <-> conversions in 8086-SSE --- build/Linux-x86_64-GCC/Makefile | 7 +++++ source/8086-SSE/s_bf16UIToCommonNaN.c | 59 +++++++++++++++++++++++++++++++++++ source/8086-SSE/s_commonNaNToBF16UI.c | 51 ++++++++++++++++++++++++++++++ source/8086-SSE/specialize.h | 21 +++++++++++++ 4 files changed, 138 insertions(+) create mode 100644 source/8086-SSE/s_bf16UIToCommonNaN.c create mode 100644 source/8086-SSE/s_commonNaNToBF16UI.c diff --git a/build/Linux-x86_64-GCC/Makefile b/build/Linux-x86_64-GCC/Makefile index 2ee5dad..72f251a 100644 --- a/build/Linux-x86_64-GCC/Makefile +++ b/build/Linux-x86_64-GCC/Makefile @@ -94,6 +94,8 @@ OBJS_SPECIALIZE = \ s_f16UIToCommonNaN$(OBJ) \ s_commonNaNToF16UI$(OBJ) \ s_propagateNaNF16UI$(OBJ) \ + s_bf16UIToCommonNaN$(OBJ) \ + s_commonNaNToBF16UI$(OBJ) \ s_f32UIToCommonNaN$(OBJ) \ s_commonNaNToF32UI$(OBJ) \ s_propagateNaNF32UI$(OBJ) \ @@ -114,6 +116,8 @@ OBJS_OTHERS = \ s_roundToUI64$(OBJ) \ s_roundToI32$(OBJ) \ s_roundToI64$(OBJ) \ + s_normSubnormalBF16Sig$(OBJ) \ + s_roundPackToBF16$(OBJ) \ s_normSubnormalF16Sig$(OBJ) \ s_roundPackToF16$(OBJ) \ s_normRoundPackToF16$(OBJ) \ @@ -172,6 +176,8 @@ OBJS_OTHERS = \ i64_to_extF80M$(OBJ) \ i64_to_f128$(OBJ) \ i64_to_f128M$(OBJ) \ + bf16_isSignalingNaN$(OBJ) \ + bf16_to_f32$(OBJ) \ f16_to_ui32$(OBJ) \ f16_to_ui64$(OBJ) \ f16_to_i32$(OBJ) \ @@ -209,6 +215,7 @@ OBJS_OTHERS = \ f32_to_ui64_r_minMag$(OBJ) \ f32_to_i32_r_minMag$(OBJ) \ f32_to_i64_r_minMag$(OBJ) \ + f32_to_bf16$(OBJ) \ f32_to_f16$(OBJ) \ f32_to_f64$(OBJ) \ f32_to_extF80$(OBJ) \ diff --git a/source/8086-SSE/s_bf16UIToCommonNaN.c b/source/8086-SSE/s_bf16UIToCommonNaN.c new file mode 100644 index 0000000..b27b804 --- /dev/null +++ b/source/8086-SSE/s_bf16UIToCommonNaN.c @@ -0,0 +1,59 @@ + +/*============================================================================ + +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 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 +#include "platform.h" +#include "specialize.h" +#include "softfloat.h" + +/*---------------------------------------------------------------------------- +| Assuming `uiA' has the bit pattern of a 32-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 +| exception is raised. +*----------------------------------------------------------------------------*/ +void softfloat_bf16UIToCommonNaN( uint_fast16_t uiA, struct commonNaN *zPtr ) +{ + + if ( softfloat_isSigNaNBF16UI( uiA ) ) { + softfloat_raiseFlags( softfloat_flag_invalid ); + } + zPtr->sign = uiA>>15; + zPtr->v64 = (uint_fast64_t) uiA<<56; + zPtr->v0 = 0; + +} + diff --git a/source/8086-SSE/s_commonNaNToBF16UI.c b/source/8086-SSE/s_commonNaNToBF16UI.c new file mode 100644 index 0000000..8cc5a61 --- /dev/null +++ b/source/8086-SSE/s_commonNaNToBF16UI.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 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 +#include "platform.h" +#include "specialize.h" + +/*---------------------------------------------------------------------------- +| Converts the common NaN pointed to by `aPtr' into a 16-bit floating-point +| NaN, and returns the bit pattern of this value as an unsigned integer. +*----------------------------------------------------------------------------*/ +uint_fast16_t softfloat_commonNaNToBF16UI( const struct commonNaN *aPtr ) +{ + + return (uint_fast16_t) aPtr->sign<<15 | 0x7FC0 | aPtr->v64>>56; + +} + diff --git a/source/8086-SSE/specialize.h b/source/8086-SSE/specialize.h index a9166e1..8ed2e75 100644 --- a/source/8086-SSE/specialize.h +++ b/source/8086-SSE/specialize.h @@ -118,6 +118,27 @@ uint_fast16_t softfloat_propagateNaNF16UI( uint_fast16_t uiA, uint_fast16_t uiB ); /*---------------------------------------------------------------------------- +| 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 BF16 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 +| exception is raised. +*----------------------------------------------------------------------------*/ +void softfloat_bf16UIToCommonNaN( uint_fast16_t uiA, struct commonNaN *zPtr ); + +/*---------------------------------------------------------------------------- +| Converts the common NaN pointed to by 'aPtr' into a 16-bit floating-point +| NaN, and returns the bit pattern of this value as an unsigned integer. +*----------------------------------------------------------------------------*/ +uint_fast16_t softfloat_commonNaNToBF16UI( const struct commonNaN *aPtr ); + +/*---------------------------------------------------------------------------- | The bit pattern for a default generated 32-bit floating-point NaN. *----------------------------------------------------------------------------*/ #define defaultNaNF32UI 0xFFC00000 -- cgit v1.1