8c7cee80eb
1 At point <https://github.com/riscv/riscv-bfloat16>, BF16 has already been completed "post public review". 2 LLVM has also added support for RISCV BF16 in <https://reviews.llvm.org/D151313> and <https://reviews.llvm.org/D150929>. 3 According to the discussion <https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/367>, this use __bf16 and use DF16b in riscv_mangle_type like x86. Below test are passed for this patch * The riscv fully regression test. gcc/ChangeLog: * config/riscv/iterators.md: New mode iterator HFBF. * config/riscv/riscv-builtins.cc (riscv_init_builtin_types): Initialize data type _Bfloat16. * config/riscv/riscv-modes.def (FLOAT_MODE): New. (ADJUST_FLOAT_FORMAT): New. * config/riscv/riscv.cc (riscv_mangle_type): Support for BFmode. (riscv_scalar_mode_supported_p): Ditto. (riscv_libgcc_floating_mode_supported_p): Ditto. (riscv_init_libfuncs): Set the conversion method for BFmode and HFmode. (riscv_block_arith_comp_libfuncs_for_mode): Set the arithmetic and comparison libfuncs for the mode. * config/riscv/riscv.md (mode" ): Add BF. (movhf): Support for BFmode. (mov<mode>): Ditto. (*movhf_softfloat): Ditto. (*mov<mode>_softfloat): Ditto. libgcc/ChangeLog: * config/riscv/sfp-machine.h (_FP_NANFRAC_B): New. (_FP_NANSIGN_B): Ditto. * config/riscv/t-softfp32: Add support for BF16 libfuncs. * config/riscv/t-softfp64: Ditto. * soft-fp/floatsibf.c: For si -> bf16. * soft-fp/floatunsibf.c: For unsi -> bf16. gcc/testsuite/ChangeLog: * gcc.target/riscv/bf16_arithmetic.c: New test. * gcc.target/riscv/bf16_call.c: New test. * gcc.target/riscv/bf16_comparison.c: New test. * gcc.target/riscv/bf16_float_libcall_convert.c: New test. * gcc.target/riscv/bf16_integer_libcall_convert.c: New test. Co-authored-by: Jin Ma <jinma@linux.alibaba.com>
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* Software floating-point emulation.
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Convert a 32bit unsigned integer to bfloat16
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Copyright (C) 2007-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU Lesser General Public
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License, the Free Software Foundation gives you unlimited
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permission to link the compiled version of this file into
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combinations with other programs, and to distribute those
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combinations without any restriction coming from the use of this
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file. (The Lesser General Public License restrictions do apply in
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other respects; for example, they cover modification of the file,
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and distribution when not linked into a combine executable.)
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include "soft-fp.h"
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#include "brain.h"
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BFtype
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__floatunsibf (USItype i)
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{
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FP_DECL_EX;
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FP_DECL_B (A);
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BFtype a;
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FP_INIT_ROUNDMODE;
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FP_FROM_INT_B (A, i, SI_BITS, USItype);
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FP_PACK_RAW_B (a, A);
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FP_HANDLE_EXCEPTIONS;
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return a;
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}
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