58f6b16c49
The RISC-V implementations of the `__mulsi3`, `__muldi3` builtins were conditionally compiling the actual function definitions depending on whether the M extension was present or not. This caused Compiler-RT testing failures for RISC-V targets with the M extension, as when these sources were included the `librt_has_mul*i3` features were still being defined. These `librt_has_*` definitions are used to conditionally run the respective tests. Since the actual functions were not being compiled-in, the generic test for `__muldi3` would fail. This patch makes these implementations follow the normal Compiler-RT convention of always including the definition, and conditionally running the respective tests by using the lit conditional `REQUIRES: librt_has_*`. Since the `mulsi3_test.c` wasn't actually RISC-V-specific, this patch also moves it out of the `riscv` directory. It now only depends on `librt_has_mulsi3` to run. Differential Revision: https://reviews.llvm.org/D86457
34 lines
815 B
PHP
34 lines
815 B
PHP
//===-- int_mul_impl.inc - Integer multiplication -------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Helpers used by __mulsi3, __muldi3.
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//
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//===----------------------------------------------------------------------===//
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#ifndef __mulxi3
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#error "__mulxi3 must be defined to use this generic implementation"
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#endif
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.text
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.align 2
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.globl __mulxi3
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.type __mulxi3, @function
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__mulxi3:
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mv a2, a0
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mv a0, zero
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.L1:
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andi a3, a1, 1
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beqz a3, .L2
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add a0, a0, a2
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.L2:
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srli a1, a1, 1
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slli a2, a2, 1
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bnez a1, .L1
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ret
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