github.com/geraldss/go/src@v0.0.0-20210511222824-ac7d0ebfc235/runtime/tls_riscv64.s (about)

     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  #include "go_asm.h"
     6  #include "go_tls.h"
     7  #include "funcdata.h"
     8  #include "textflag.h"
     9  
    10  // If !iscgo, this is a no-op.
    11  //
    12  // NOTE: mcall() assumes this clobbers only X31 (REG_TMP).
    13  TEXT runtime·save_g(SB),NOSPLIT|NOFRAME,$0-0
    14  	MOVB	runtime·iscgo(SB), X31
    15  	BEQ	X0, X31, nocgo
    16  
    17  	MOV	runtime·tls_g(SB), X31
    18  	ADD	X4, X31		// add offset to thread pointer (X4)
    19  	MOV	g, (X31)
    20  
    21  nocgo:
    22  	RET
    23  
    24  TEXT runtime·load_g(SB),NOSPLIT|NOFRAME,$0-0
    25  	MOV	runtime·tls_g(SB), X31
    26  	ADD	X4, X31		// add offset to thread pointer (X4)
    27  	MOV	(X31), g
    28  	RET
    29  
    30  GLOBL runtime·tls_g(SB), TLSBSS, $8