| // 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. |
| |
| // +build gc,arm |
| |
| #include "textflag.h" |
| |
| // try to run "vmov.f64 d0, d0" instruction |
| TEXT ·useVFPv1(SB),NOSPLIT,$0 |
| WORD $0xeeb00b40 // vmov.f64 d0, d0 |
| RET |
| |
| // try to run VFPv3-only "vmov.f64 d0, #112" instruction |
| TEXT ·useVFPv3(SB),NOSPLIT,$0 |
| WORD $0xeeb70b00 // vmov.f64 d0, #112 |
| RET |
| |
| // try to run ARMv6K (or above) "ldrexd" instruction |
| TEXT ·useARMv6K(SB),NOSPLIT,$32 |
| MOVW R13, R2 |
| BIC $15, R13 |
| WORD $0xe1bd0f9f // ldrexd r0, r1, [sp] |
| WORD $0xf57ff01f // clrex |
| MOVW R2, R13 |
| RET |
