| 1 | //===-- subsf3vfp.S - Implement subsf3vfp ---------------------------------===// |
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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 float __subsf3vfp(float a, float b); |
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| 13 | // |
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| 14 | // Returns the difference between two single precision floating point numbers |
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| 15 | // using the Darwin calling convention where single arguments are passsed |
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| 16 | // like 32-bit ints. |
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| 17 | // |
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| 18 | .syntax unified |
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| 19 | .p2align 2 |
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| 20 | DEFINE_COMPILERRT_FUNCTION(__subsf3vfp) |
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| 21 | #if defined(COMPILER_RT_ARMHF_TARGET) |
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| 22 | vsub.f32 s0, s0, s1 |
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| 23 | #else |
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| 24 | vmov s14, r0 // move first param from r0 into float register |
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| 25 | vmov s15, r1 // move second param from r1 into float register |
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| 26 | vsub.f32 s14, s14, s15 |
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| 27 | vmov r0, s14 // move result back to r0 |
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| 28 | #endif |
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| 29 | bx lr |
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| 30 | END_COMPILERRT_FUNCTION(__subsf3vfp) |
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| 31 | |
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| 32 | NO_EXEC_STACK_DIRECTIVE |
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| 33 | |
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| 34 | |
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