vfp_arm.s

Documentation: cmd/dist

     1// Copyright 2015 The Go Authors. All rights reserved.
     2// Use of this source code is governed by a BSD-style
     3// license that can be found in the LICENSE file.
     4
     5//go:build gc
     6
     7#include "textflag.h"
     8
     9// try to run "vmov.f64 d0, d0" instruction
    10TEXT ·useVFPv1(SB),NOSPLIT,$0
    11	WORD $0xeeb00b40	// vmov.f64 d0, d0
    12	RET
    13
    14// try to run VFPv3-only "vmov.f64 d0, #112" instruction
    15TEXT ·useVFPv3(SB),NOSPLIT,$0
    16	WORD $0xeeb70b00	// vmov.f64 d0, #112
    17	RET
    18
    19// try to run ARMv6K (or above) "ldrexd" instruction
    20TEXT ·useARMv6K(SB),NOSPLIT,$32
    21	MOVW R13, R2
    22	BIC  $15, R13
    23	WORD $0xe1bd0f9f	// ldrexd r0, r1, [sp]
    24	WORD $0xf57ff01f	// clrex
    25	MOVW R2, R13
    26	RET
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