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37 lines
1.0 KiB
37 lines
1.0 KiB
7 months ago
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//===-- unordsf2vfp.S - Implement unordsf2vfp -----------------------------===//
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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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#include "../assembly.h"
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//
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// extern int __unordsf2vfp(float a, float b);
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//
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// Returns one iff a or b is NaN
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// Uses Darwin calling convention where single precision arguments are passsed
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// like 32-bit ints
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//
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.syntax unified
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__unordsf2vfp)
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#if defined(COMPILER_RT_ARMHF_TARGET)
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vcmp.f32 s0, s1
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#else
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vmov s14, r0 // move from GPR 0 to float register
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vmov s15, r1 // move from GPR 1 to float register
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vcmp.f32 s14, s15
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#endif
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vmrs apsr_nzcv, fpscr
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ITE(vs)
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movvs r0, #1 // set result register to 1 if "overflow" (any NaNs)
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movvc r0, #0
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bx lr
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END_COMPILERRT_FUNCTION(__unordsf2vfp)
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NO_EXEC_STACK_DIRECTIVE
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