diff options
Diffstat (limited to 'src/cmd/dist/vfp_arm.s')
| -rw-r--r-- | src/cmd/dist/vfp_arm.s | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/cmd/dist/vfp_arm.s b/src/cmd/dist/vfp_arm.s new file mode 100644 index 0000000..d571f8b --- /dev/null +++ b/src/cmd/dist/vfp_arm.s @@ -0,0 +1,26 @@ +// 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 |