| 1 | //===-- gtdf2vfp.S - Implement gtdf2vfp -----------------------------------===// |
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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 __gtdf2vfp(double a, double b); |
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| 13 | // |
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| 14 | // Returns one iff a > b and neither is NaN. |
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| 15 | // Uses Darwin calling convention where double precision arguments are passsed |
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| 16 | // like in GPR pairs. |
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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(__gtdf2vfp) |
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| 21 | #if defined(COMPILER_RT_ARMHF_TARGET) |
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| 22 | vcmp.f64 d0, d1 |
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| 23 | #else |
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| 24 | vmov d6, r0, r1 // load r0/r1 pair in double register |
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| 25 | vmov d7, r2, r3 // load r2/r3 pair in double register |
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| 26 | vcmp.f64 d6, d7 |
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| 27 | #endif |
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| 28 | vmrs apsr_nzcv, fpscr |
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| 29 | ITE(gt) |
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| 30 | movgt r0, #1 // set result register to 1 if equal |
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| 31 | movle r0, #0 |
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| 32 | bx lr |
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| 33 | END_COMPILERRT_FUNCTION(__gtdf2vfp) |
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| 34 | |
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| 35 | NO_EXEC_STACK_DIRECTIVE |
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| 36 | |
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| 37 | |
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