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GCC provides these functions (e.g. __addtf3, etc.) in libgcc on x86_64. Since Clang supports float128, we can also enable the existing code by using float128 for fp_t if either __FLOAT128__ or __SIZEOF_FLOAT128__ is defined instead of only supporting these builtins for platforms with 128-bit IEEE long doubles. This commit defines a new tf_float typedef that matches a float with attribute((mode(TF)) on each given architecture. There are more tests that could be enabled for x86, but to keep the diff smaller, I restricted test changes to ones that started failing as part of this refactoring. This change has been tested on x86 (natively) and aarch64,powerpc64,riscv64 and sparc64 via qemu-user. This supersedes https://reviews.llvm.org/D98261 and should also cover the changes from https://github.com/llvm/llvm-project/pull/68041.
21 lines
612 B
C
21 lines
612 B
C
//===-- lib/trunctfhf2.c - quad -> half conversion ----------------*- C -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#define QUAD_PRECISION
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#include "fp_lib.h"
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#if defined(CRT_HAS_TF_MODE) && defined(COMPILER_RT_HAS_FLOAT16)
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#define SRC_QUAD
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#define DST_HALF
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#include "fp_trunc_impl.inc"
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COMPILER_RT_ABI dst_t __trunctfhf2(src_t a) { return __truncXfYf2__(a); }
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#endif
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