| 1 | //===-- subdf3vfp.S - Implement subdf3vfp ---------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "../assembly.h" |
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| 10 | |
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| 11 | // |
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| 12 | // extern double __subdf3vfp(double a, double b); |
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| 13 | // |
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| 14 | // Returns difference between two double precision floating point numbers using |
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| 15 | // the Darwin calling convention where double arguments are passsed in GPR pairs |
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| 16 | // |
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| 17 | .syntax unified |
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| 18 | .p2align 2 |
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| 19 | DEFINE_COMPILERRT_FUNCTION(__subdf3vfp) |
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| 20 | #if defined(COMPILER_RT_ARMHF_TARGET) |
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| 21 | vsub.f64 d0, d0, d1 |
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| 22 | #else |
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| 23 | VMOV_TO_DOUBLE(d6, r0, r1) // move first param from r0/r1 pair into d6 |
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| 24 | VMOV_TO_DOUBLE(d7, r2, r3) // move second param from r2/r3 pair into d7 |
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| 25 | vsub.f64 d6, d6, d7 |
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| 26 | VMOV_FROM_DOUBLE(r0, r1, d6) // move result back to r0/r1 pair |
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| 27 | #endif |
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| 28 | bx lr |
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| 29 | END_COMPILERRT_FUNCTION(__subdf3vfp) |
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| 30 | |
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| 31 | NO_EXEC_STACK_DIRECTIVE |
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| 32 | |
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| 33 | |
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