Text file src/pkg/cmd/dist/vfp_arm.s

     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	// +build gc,arm
     6	
     7	#include "textflag.h"
     8	
     9	// try to run "vmov.f64 d0, d0" instruction
    10	TEXT ·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
    15	TEXT ·useVFPv3(SB),NOSPLIT,$0
    16		WORD $0xeeb70b00	// vmov.f64 d0, #112
    17		RET
    18	
    19	// try to run ARMv6K (or above) "ldrexd" instruction
    20	TEXT ·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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