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TheRock/compiler/amd-llvm/compiler-rt/lib/builtins/arm/aeabi_dcmp.S
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66 lines
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ArmAsm

//===-- aeabi_dcmp.S - EABI dcmp* implementation ---------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "../assembly.h"
// int __aeabi_dcmp{eq,lt,le,ge,gt}(double a, double b) {
// int result = __{eq,lt,le,ge,gt}df2(a, b);
// if (result {==,<,<=,>=,>} 0) {
// return 1;
// } else {
// return 0;
// }
// }
#if defined(COMPILER_RT_ARMHF_TARGET)
# define CONVERT_DCMP_ARGS_TO_DF2_ARGS \
VMOV_TO_DOUBLE(d0, r0, r1) \
VMOV_TO_DOUBLE(d1, r2, r3)
#else
# define CONVERT_DCMP_ARGS_TO_DF2_ARGS
#endif
#if defined(__ARM_FEATURE_PAC_DEFAULT)
# define PROLOGUE PACBTI_LANDING SEPARATOR \
push { r12, lr }
# define EPILOGUE pop { r12, lr } SEPARATOR \
PAC_RETURN
#elif defined(__ARM_FEATURE_BTI_DEFAULT)
# define PROLOGUE PACBTI_LANDING SEPARATOR \
push { r4, lr }
# define EPILOGUE pop { r4, pc }
#else
# define PROLOGUE push { r4, lr }
# define EPILOGUE pop { r4, pc }
#endif
#define DEFINE_AEABI_DCMP(cond) \
.syntax unified SEPARATOR \
.p2align 2 SEPARATOR \
DEFINE_COMPILERRT_FUNCTION(__aeabi_dcmp ## cond) \
PROLOGUE SEPARATOR \
CONVERT_DCMP_ARGS_TO_DF2_ARGS SEPARATOR \
bl SYMBOL_NAME(__ ## cond ## df2) SEPARATOR \
cmp r0, #0 SEPARATOR \
b ## cond 1f SEPARATOR \
movs r0, #0 SEPARATOR \
EPILOGUE SEPARATOR \
1: SEPARATOR \
movs r0, #1 SEPARATOR \
EPILOGUE SEPARATOR \
END_COMPILERRT_FUNCTION(__aeabi_dcmp ## cond)
DEFINE_AEABI_DCMP(eq)
DEFINE_AEABI_DCMP(lt)
DEFINE_AEABI_DCMP(le)
DEFINE_AEABI_DCMP(ge)
DEFINE_AEABI_DCMP(gt)
NO_EXEC_STACK_DIRECTIVE