| //===-- cmpdf2.S - double-precision floating point comparison -------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This function has the semantics of GNU __cmpdf2: it's a three-way compare |
| // which returns <0 if x<y, 0 if x==y, and >0 if x>y. If the result is |
| // unordered (i.e. x or y or both is NaN) then it returns >0. |
| // |
| // This also makes it suitable for use as all of __eqdf2, __nedf2, __ltdf2 or |
| // __ledf2. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "../assembly.h" |
| #include "crt_endian.h" |
| |
| .syntax unified |
| .text |
| .p2align 2 |
| |
| |
| op0h .req xh |
| op0l .req xl |
| op1h .req yh |
| op1l .req yl |
| .macro SetReturnRegister |
| mov r0, #0 |
| movhi r0, #1 |
| movlo r0, #-1 |
| .endm |
| .macro SetReturnRegisterNE |
| movne r0, #-1 |
| movhi r0, #1 |
| .endm |
| |
| #if __ARM_PCS_VFP |
| DEFINE_COMPILERRT_FUNCTION(__cmpdf2) |
| push {r4, lr} |
| VMOV_FROM_DOUBLE(r0, r1, d0) |
| VMOV_FROM_DOUBLE(r2, r3, d1) |
| bl __compiler_rt_softfp_cmpdf2 |
| pop {r4, pc} |
| #else |
| DEFINE_COMPILERRT_FUNCTION_ALIAS(__cmpdf2, __compiler_rt_softfp_cmpdf2) |
| #endif |
| DEFINE_COMPILERRT_FUNCTION_ALIAS(__ledf2, __cmpdf2) |
| DEFINE_COMPILERRT_FUNCTION_ALIAS(__ltdf2, __cmpdf2) |
| DEFINE_COMPILERRT_FUNCTION_ALIAS(__eqdf2, __cmpdf2) |
| DEFINE_COMPILERRT_FUNCTION_ALIAS(__nedf2, __cmpdf2) |
| |
| DEFINE_COMPILERRT_FUNCTION(__compiler_rt_softfp_cmpdf2) |
| #include "dcmp.h" |
| |
| LOCAL_LABEL(NaN): |
| mov r0, #+1 |
| bx lr |
| |
| END_COMPILERRT_FUNCTION(__compiler_rt_softfp_cmpdf2) |
| |
| NO_EXEC_STACK_DIRECTIVE |
