From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id E2C0A3858D20 for ; Thu, 9 Mar 2023 17:54:21 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org E2C0A3858D20 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678384461; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type; bh=ICAdOdmiFhtvXVJXEUg1R9f7UD4y1XhkjDD/8LvAH8E=; b=CMTuxLXcE4/PrvcBvZQMvqdzEss8MYnPdhR1FLiCgudOM7lqQ2VhLLms9UJOhmnN8J6HzC TPWi/0HZO1kurYQ9+GsHTb1M7hNb+M681GII9BI7AQLXsbl6s5V5Rcmj28JueIa8aUR3EY h+Rl9Te2cRrVgxNTQo1uFDtgROJzE7g= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-661-ngTrjUApN7mPnC7WeR9ogA-1; Thu, 09 Mar 2023 12:54:20 -0500 X-MC-Unique: ngTrjUApN7mPnC7WeR9ogA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E11BF1C041B1 for ; Thu, 9 Mar 2023 17:54:19 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.39.192.16]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 891622166B26 for ; Thu, 9 Mar 2023 17:54:19 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.17.1/8.17.1) with ESMTPS id 329HsHS21200513 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT) for ; Thu, 9 Mar 2023 18:54:17 +0100 Received: (from jakub@localhost) by tucnak.zalov.cz (8.17.1/8.17.1/Submit) id 329HsG1A1200054 for libc-alpha@sourceware.org; Thu, 9 Mar 2023 18:54:16 +0100 Date: Thu, 9 Mar 2023 18:54:16 +0100 From: Jakub Jelinek To: libc-alpha@sourceware.org Subject: [PATCH] Soft-fp: Add brain format support Message-ID: Reply-To: Jakub Jelinek MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Spam-Status: No, score=-9.7 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,KAM_SHORT,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: In https://gcc.gnu.org/r13-3292 I've added brain format support (std::bfloat16_t) on the GCC side, but as glibc has the master copy of soft-fp, the following patch adds the files from that commit and also from https://gcc.gnu.org/pipermail/gcc-patches/2022-November/606398.html to glibc. diff --git a/soft-fp/brain.h b/soft-fp/brain.h new file mode 100644 index 0000000000..15b63a9a34 --- /dev/null +++ b/soft-fp/brain.h @@ -0,0 +1,172 @@ +/* Software floating-point emulation. + Definitions for Brain Floating Point format (bfloat16). + Copyright (C) 1997-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef SOFT_FP_BRAIN_H +#define SOFT_FP_BRAIN_H 1 + +#if _FP_W_TYPE_SIZE < 32 +# error "Here's a nickel kid. Go buy yourself a real computer." +#endif + +#define _FP_FRACTBITS_B (_FP_W_TYPE_SIZE) + +#define _FP_FRACTBITS_DW_B (_FP_W_TYPE_SIZE) + +#define _FP_FRACBITS_B 8 +#define _FP_FRACXBITS_B (_FP_FRACTBITS_B - _FP_FRACBITS_B) +#define _FP_WFRACBITS_B (_FP_WORKBITS + _FP_FRACBITS_B) +#define _FP_WFRACXBITS_B (_FP_FRACTBITS_B - _FP_WFRACBITS_B) +#define _FP_EXPBITS_B 8 +#define _FP_EXPBIAS_B 127 +#define _FP_EXPMAX_B 255 + +#define _FP_QNANBIT_B ((_FP_W_TYPE) 1 << (_FP_FRACBITS_B-2)) +#define _FP_QNANBIT_SH_B ((_FP_W_TYPE) 1 << (_FP_FRACBITS_B-2+_FP_WORKBITS)) +#define _FP_IMPLBIT_B ((_FP_W_TYPE) 1 << (_FP_FRACBITS_B-1)) +#define _FP_IMPLBIT_SH_B ((_FP_W_TYPE) 1 << (_FP_FRACBITS_B-1+_FP_WORKBITS)) +#define _FP_OVERFLOW_B ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_B)) + +#define _FP_WFRACBITS_DW_B (2 * _FP_WFRACBITS_B) +#define _FP_WFRACXBITS_DW_B (_FP_FRACTBITS_DW_B - _FP_WFRACBITS_DW_B) +#define _FP_HIGHBIT_DW_B \ + ((_FP_W_TYPE) 1 << (_FP_WFRACBITS_DW_B - 1) % _FP_W_TYPE_SIZE) + +/* The implementation of _FP_MUL_MEAT_B and _FP_DIV_MEAT_B should be + chosen by the target machine. */ + +typedef float BFtype __attribute__ ((mode (BF))); + +union _FP_UNION_B +{ + BFtype flt; + struct _FP_STRUCT_LAYOUT + { +#if __BYTE_ORDER == __BIG_ENDIAN + unsigned sign : 1; + unsigned exp : _FP_EXPBITS_B; + unsigned frac : _FP_FRACBITS_B - (_FP_IMPLBIT_B != 0); +#else + unsigned frac : _FP_FRACBITS_B - (_FP_IMPLBIT_B != 0); + unsigned exp : _FP_EXPBITS_B; + unsigned sign : 1; +#endif + } bits; +}; + +#define FP_DECL_B(X) _FP_DECL (1, X) +#define FP_UNPACK_RAW_B(X, val) _FP_UNPACK_RAW_1 (B, X, (val)) +#define FP_UNPACK_RAW_BP(X, val) _FP_UNPACK_RAW_1_P (B, X, (val)) +#define FP_PACK_RAW_B(val, X) _FP_PACK_RAW_1 (B, (val), X) +#define FP_PACK_RAW_BP(val, X) \ + do \ + { \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_1_P (B, (val), X); \ + } \ + while (0) + +#define FP_UNPACK_B(X, val) \ + do \ + { \ + _FP_UNPACK_RAW_1 (B, X, (val)); \ + _FP_UNPACK_CANONICAL (B, 1, X); \ + } \ + while (0) + +#define FP_UNPACK_BP(X, val) \ + do \ + { \ + _FP_UNPACK_RAW_1_P (B, X, (val)); \ + _FP_UNPACK_CANONICAL (B, 1, X); \ + } \ + while (0) + +#define FP_UNPACK_SEMIRAW_B(X, val) \ + do \ + { \ + _FP_UNPACK_RAW_1 (B, X, (val)); \ + _FP_UNPACK_SEMIRAW (B, 1, X); \ + } \ + while (0) + +#define FP_UNPACK_SEMIRAW_BP(X, val) \ + do \ + { \ + _FP_UNPACK_RAW_1_P (B, X, (val)); \ + _FP_UNPACK_SEMIRAW (B, 1, X); \ + } \ + while (0) + +#define FP_PACK_B(val, X) \ + do \ + { \ + _FP_PACK_CANONICAL (B, 1, X); \ + _FP_PACK_RAW_1 (B, (val), X); \ + } \ + while (0) + +#define FP_PACK_BP(val, X) \ + do \ + { \ + _FP_PACK_CANONICAL (B, 1, X); \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_1_P (B, (val), X); \ + } \ + while (0) + +#define FP_PACK_SEMIRAW_B(val, X) \ + do \ + { \ + _FP_PACK_SEMIRAW (B, 1, X); \ + _FP_PACK_RAW_1 (B, (val), X); \ + } \ + while (0) + +#define FP_PACK_SEMIRAW_BP(val, X) \ + do \ + { \ + _FP_PACK_SEMIRAW (B, 1, X); \ + if (!FP_INHIBIT_RESULTS) \ + _FP_PACK_RAW_1_P (B, (val), X); \ + } \ + while (0) + +#define FP_TO_INT_B(r, X, rsz, rsg) _FP_TO_INT (B, 1, (r), X, (rsz), (rsg)) +#define FP_TO_INT_ROUND_B(r, X, rsz, rsg) \ + _FP_TO_INT_ROUND (B, 1, (r), X, (rsz), (rsg)) +#define FP_FROM_INT_B(X, r, rs, rt) _FP_FROM_INT (B, 1, X, (r), (rs), rt) + +/* BFmode arithmetic is not implemented. */ + +#define _FP_FRAC_HIGH_B(X) _FP_FRAC_HIGH_1 (X) +#define _FP_FRAC_HIGH_RAW_B(X) _FP_FRAC_HIGH_1 (X) +#define _FP_FRAC_HIGH_DW_B(X) _FP_FRAC_HIGH_1 (X) + +#define FP_CMP_EQ_B(r, X, Y, ex) _FP_CMP_EQ (B, 1, (r), X, Y, (ex)) + +#endif /* !SOFT_FP_BRAIN_H */ diff --git a/soft-fp/extendbfsf2.c b/soft-fp/extendbfsf2.c new file mode 100644 index 0000000000..3589e57e31 --- /dev/null +++ b/soft-fp/extendbfsf2.c @@ -0,0 +1,49 @@ +/* Software floating-point emulation. + Return an bfloat16 converted to IEEE single + Copyright (C) 2022-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#define FP_NO_EXACT_UNDERFLOW +#include "soft-fp.h" +#include "brain.h" +#include "single.h" + +SFtype +__extendbfsf2 (BFtype a) +{ + FP_DECL_EX; + FP_DECL_B (A); + FP_DECL_S (R); + SFtype r; + + FP_INIT_EXCEPTIONS; + FP_UNPACK_RAW_B (A, a); + FP_EXTEND (S, B, 1, 1, R, A); + FP_PACK_RAW_S (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} diff --git a/soft-fp/floattibf.c b/soft-fp/floattibf.c new file mode 100644 index 0000000000..f3336a95b0 --- /dev/null +++ b/soft-fp/floattibf.c @@ -0,0 +1,45 @@ +/* Software floating-point emulation. + Convert a 128bit signed integer to bfloat16 + Copyright (C) 2007-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "brain.h" + +BFtype +__floattibf (TItype i) +{ + FP_DECL_EX; + FP_DECL_B (A); + BFtype a; + + FP_INIT_ROUNDMODE; + FP_FROM_INT_B (A, i, TI_BITS, UTItype); + FP_PACK_RAW_B (a, A); + FP_HANDLE_EXCEPTIONS; + + return a; +} diff --git a/soft-fp/floatuntibf.c b/soft-fp/floatuntibf.c new file mode 100644 index 0000000000..362b0f6c1b --- /dev/null +++ b/soft-fp/floatuntibf.c @@ -0,0 +1,45 @@ +/* Software floating-point emulation. + Convert a 128bit unsigned integer to bfloat16 + Copyright (C) 2007-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "brain.h" + +BFtype +__floatuntibf (UTItype i) +{ + FP_DECL_EX; + FP_DECL_B (A); + BFtype a; + + FP_INIT_ROUNDMODE; + FP_FROM_INT_B (A, i, TI_BITS, UTItype); + FP_PACK_RAW_B (a, A); + FP_HANDLE_EXCEPTIONS; + + return a; +} diff --git a/soft-fp/truncbfhf2.c b/soft-fp/truncbfhf2.c new file mode 100644 index 0000000000..655c5f45ef --- /dev/null +++ b/soft-fp/truncbfhf2.c @@ -0,0 +1,75 @@ +/* Software floating-point emulation. + Truncate bfloat16 into IEEE half. + Copyright (C) 2022-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "half.h" +#include "brain.h" +#include "single.h" + +/* BFtype and HFtype are unordered, neither is a superset or subset + of each other. Convert BFtype to SFtype (lossless) and then + truncate to HFtype. */ + +HFtype +__truncbfhf2 (BFtype a) +{ + FP_DECL_EX; + FP_DECL_H (A); + FP_DECL_S (B); + FP_DECL_B (R); + SFtype b; + HFtype r; + + FP_INIT_ROUNDMODE; + /* Optimize BFtype to SFtype conversion to simple left shift + by 16 if possible, we don't need to raise exceptions on sNaN + here as the SFtype to HFtype truncation should do that too. */ + if (sizeof (BFtype) == 2 + && sizeof (unsigned short) == 2 + && sizeof (SFtype) == 4 + && sizeof (unsigned int) == 4) + { + union { BFtype a; unsigned short b; } u1; + union { SFtype a; unsigned int b; } u2; + u1.a = a; + u2.b = (u1.b << 8) << 8; + b = u2.a; + } + else + { + FP_UNPACK_RAW_B (A, a); + FP_EXTEND (S, B, 1, 1, B, A); + FP_PACK_RAW_S (b, B); + } + FP_UNPACK_SEMIRAW_S (B, b); + FP_TRUNC (H, S, 1, 1, R, B); + FP_PACK_SEMIRAW_H (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} diff --git a/soft-fp/truncdfbf2.c b/soft-fp/truncdfbf2.c new file mode 100644 index 0000000000..fd3ff525a1 --- /dev/null +++ b/soft-fp/truncdfbf2.c @@ -0,0 +1,52 @@ +/* Software floating-point emulation. + Truncate IEEE double into bfloat16. + Copyright (C) 2022-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "brain.h" +#include "double.h" + +BFtype +__truncdfbf2 (DFtype a) +{ + FP_DECL_EX; + FP_DECL_D (A); + FP_DECL_B (R); + BFtype r; + + FP_INIT_ROUNDMODE; + FP_UNPACK_SEMIRAW_D (A, a); +#if _FP_W_TYPE_SIZE < _FP_FRACBITS_D + FP_TRUNC (B, D, 1, 2, R, A); +#else + FP_TRUNC (B, D, 1, 1, R, A); +#endif + FP_PACK_SEMIRAW_B (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} diff --git a/soft-fp/trunchfbf2.c b/soft-fp/trunchfbf2.c new file mode 100644 index 0000000000..248bed830c --- /dev/null +++ b/soft-fp/trunchfbf2.c @@ -0,0 +1,58 @@ +/* Software floating-point emulation. + Truncate IEEE half into bfloat16. + Copyright (C) 2022-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "brain.h" +#include "half.h" +#include "single.h" + +/* BFtype and HFtype are unordered, neither is a superset or subset + of each other. Convert HFtype to SFtype (lossless) and then + truncate to BFtype. */ + +BFtype +__trunchfbf2 (HFtype a) +{ + FP_DECL_EX; + FP_DECL_H (A); + FP_DECL_S (B); + FP_DECL_B (R); + SFtype b; + BFtype r; + + FP_INIT_ROUNDMODE; + FP_UNPACK_RAW_H (A, a); + FP_EXTEND (S, H, 1, 1, B, A); + FP_PACK_RAW_S (b, B); + FP_UNPACK_SEMIRAW_S (B, b); + FP_TRUNC (B, S, 1, 1, R, B); + FP_PACK_SEMIRAW_B (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} diff --git a/soft-fp/truncsfbf2.c b/soft-fp/truncsfbf2.c new file mode 100644 index 0000000000..9a5a9a0648 --- /dev/null +++ b/soft-fp/truncsfbf2.c @@ -0,0 +1,48 @@ +/* Software floating-point emulation. + Truncate IEEE single into bfloat16. + Copyright (C) 2022-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "brain.h" +#include "single.h" + +BFtype +__truncsfbf2 (SFtype a) +{ + FP_DECL_EX; + FP_DECL_S (A); + FP_DECL_B (R); + BFtype r; + + FP_INIT_ROUNDMODE; + FP_UNPACK_SEMIRAW_S (A, a); + FP_TRUNC (B, S, 1, 1, R, A); + FP_PACK_SEMIRAW_B (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} diff --git a/soft-fp/trunctfbf2.c b/soft-fp/trunctfbf2.c new file mode 100644 index 0000000000..9b6bf93bbb --- /dev/null +++ b/soft-fp/trunctfbf2.c @@ -0,0 +1,52 @@ +/* Software floating-point emulation. + Truncate IEEE quad into bfloat16. + Copyright (C) 2022-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "brain.h" +#include "quad.h" + +BFtype +__trunctfbf2 (TFtype a) +{ + FP_DECL_EX; + FP_DECL_Q (A); + FP_DECL_B (R); + BFtype r; + + FP_INIT_ROUNDMODE; + FP_UNPACK_SEMIRAW_Q (A, a); +#if _FP_W_TYPE_SIZE < 64 + FP_TRUNC (B, Q, 1, 4, R, A); +#else + FP_TRUNC (B, Q, 1, 2, R, A); +#endif + FP_PACK_SEMIRAW_B (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} diff --git a/soft-fp/truncxfbf2.c b/soft-fp/truncxfbf2.c new file mode 100644 index 0000000000..2c3f288c92 --- /dev/null +++ b/soft-fp/truncxfbf2.c @@ -0,0 +1,52 @@ +/* Software floating-point emulation. + Truncate IEEE extended into bfloat16. + Copyright (C) 2022-2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + In addition to the permissions in the GNU Lesser General Public + License, the Free Software Foundation gives you unlimited + permission to link the compiled version of this file into + combinations with other programs, and to distribute those + combinations without any restriction coming from the use of this + file. (The Lesser General Public License restrictions do apply in + other respects; for example, they cover modification of the file, + and distribution when not linked into a combine executable.) + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include "soft-fp.h" +#include "brain.h" +#include "extended.h" + +BFtype +__truncxfbf2 (XFtype a) +{ + FP_DECL_EX; + FP_DECL_E (A); + FP_DECL_B (R); + BFtype r; + + FP_INIT_ROUNDMODE; + FP_UNPACK_SEMIRAW_E (A, a); +#if _FP_W_TYPE_SIZE < 64 + FP_TRUNC (B, E, 1, 4, R, A); +#else + FP_TRUNC (B, E, 1, 2, R, A); +#endif + FP_PACK_SEMIRAW_B (r, R); + FP_HANDLE_EXCEPTIONS; + + return r; +} Jakub