| // Copyright 2015 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| //go:build gc | |
| #include "textflag.h" | |
| // try to run "vmov.f64 d0, d0" instruction | |
| TEXT 路useVFPv1(SB),NOSPLIT,$0 | |
| WORD $0xeeb00b40 // vmov.f64 d0, d0 | |
| RET | |
| // try to run VFPv3-only "vmov.f64 d0, #112" instruction | |
| TEXT 路useVFPv3(SB),NOSPLIT,$0 | |
| WORD $0xeeb70b00 // vmov.f64 d0, #112 | |
| RET | |
| // try to run ARMv6K (or above) "ldrexd" instruction | |
| TEXT 路useARMv6K(SB),NOSPLIT,$32 | |
| MOVW R13, R2 | |
| BIC $15, R13 | |
| WORD $0xe1bd0f9f // ldrexd r0, r1, [sp] | |
| WORD $0xf57ff01f // clrex | |
| MOVW R2, R13 | |
| RET | |