github.com/zebozhuang/go@v0.0.0-20200207033046-f8a98f6f5c5d/src/runtime/internal/atomic/asm_ppc64x.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  // +build ppc64 ppc64le
     6  
     7  #include "textflag.h"
     8  
     9  // bool cas(uint32 *ptr, uint32 old, uint32 new)
    10  // Atomically:
    11  //	if(*val == old){
    12  //		*val = new;
    13  //		return 1;
    14  //	} else
    15  //		return 0;
    16  TEXT runtime∕internal∕atomic·Cas(SB), NOSPLIT, $0-17
    17  	MOVD	ptr+0(FP), R3
    18  	MOVWZ	old+8(FP), R4
    19  	MOVWZ	new+12(FP), R5
    20  	SYNC
    21  cas_again:
    22  	LWAR	(R3), R6
    23  	CMPW	R6, R4
    24  	BNE	cas_fail
    25  	STWCCC	R5, (R3)
    26  	BNE	cas_again
    27  	MOVD	$1, R3
    28  	ISYNC
    29  	MOVB	R3, ret+16(FP)
    30  	RET
    31  cas_fail:
    32  	MOVB	R0, ret+16(FP)
    33  	RET
    34  
    35  // bool	runtime∕internal∕atomic·Cas64(uint64 *ptr, uint64 old, uint64 new)
    36  // Atomically:
    37  //	if(*val == *old){
    38  //		*val = new;
    39  //		return 1;
    40  //	} else {
    41  //		return 0;
    42  //	}
    43  TEXT runtime∕internal∕atomic·Cas64(SB), NOSPLIT, $0-25
    44  	MOVD	ptr+0(FP), R3
    45  	MOVD	old+8(FP), R4
    46  	MOVD	new+16(FP), R5
    47  	SYNC
    48  cas64_again:
    49  	LDAR	(R3), R6
    50  	CMP	R6, R4
    51  	BNE	cas64_fail
    52  	STDCCC	R5, (R3)
    53  	BNE	cas64_again
    54  	MOVD	$1, R3
    55  	ISYNC
    56  	MOVB	R3, ret+24(FP)
    57  	RET
    58  cas64_fail:
    59  	MOVB	R0, ret+24(FP)
    60  	RET
    61  
    62  TEXT runtime∕internal∕atomic·Casuintptr(SB), NOSPLIT, $0-25
    63  	BR	runtime∕internal∕atomic·Cas64(SB)
    64  
    65  TEXT runtime∕internal∕atomic·Loaduintptr(SB),  NOSPLIT|NOFRAME, $0-16
    66  	BR	runtime∕internal∕atomic·Load64(SB)
    67  
    68  TEXT runtime∕internal∕atomic·Loaduint(SB), NOSPLIT|NOFRAME, $0-16
    69  	BR	runtime∕internal∕atomic·Load64(SB)
    70  
    71  TEXT runtime∕internal∕atomic·Storeuintptr(SB), NOSPLIT, $0-16
    72  	BR	runtime∕internal∕atomic·Store64(SB)
    73  
    74  TEXT runtime∕internal∕atomic·Xadduintptr(SB), NOSPLIT, $0-24
    75  	BR	runtime∕internal∕atomic·Xadd64(SB)
    76  
    77  TEXT runtime∕internal∕atomic·Loadint64(SB), NOSPLIT, $0-16
    78  	BR	runtime∕internal∕atomic·Load64(SB)
    79  
    80  TEXT runtime∕internal∕atomic·Xaddint64(SB), NOSPLIT, $0-24
    81  	BR	runtime∕internal∕atomic·Xadd64(SB)
    82  
    83  // bool casp(void **val, void *old, void *new)
    84  // Atomically:
    85  //	if(*val == old){
    86  //		*val = new;
    87  //		return 1;
    88  //	} else
    89  //		return 0;
    90  TEXT runtime∕internal∕atomic·Casp1(SB), NOSPLIT, $0-25
    91  	BR runtime∕internal∕atomic·Cas64(SB)
    92  
    93  // uint32 xadd(uint32 volatile *ptr, int32 delta)
    94  // Atomically:
    95  //	*val += delta;
    96  //	return *val;
    97  TEXT runtime∕internal∕atomic·Xadd(SB), NOSPLIT, $0-20
    98  	MOVD	ptr+0(FP), R4
    99  	MOVW	delta+8(FP), R5
   100  	SYNC
   101  	LWAR	(R4), R3
   102  	ADD	R5, R3
   103  	STWCCC	R3, (R4)
   104  	BNE	-3(PC)
   105  	ISYNC
   106  	MOVW	R3, ret+16(FP)
   107  	RET
   108  
   109  TEXT runtime∕internal∕atomic·Xadd64(SB), NOSPLIT, $0-24
   110  	MOVD	ptr+0(FP), R4
   111  	MOVD	delta+8(FP), R5
   112  	SYNC
   113  	LDAR	(R4), R3
   114  	ADD	R5, R3
   115  	STDCCC	R3, (R4)
   116  	BNE	-3(PC)
   117  	ISYNC
   118  	MOVD	R3, ret+16(FP)
   119  	RET
   120  
   121  TEXT runtime∕internal∕atomic·Xchg(SB), NOSPLIT, $0-20
   122  	MOVD	ptr+0(FP), R4
   123  	MOVW	new+8(FP), R5
   124  	SYNC
   125  	LWAR	(R4), R3
   126  	STWCCC	R5, (R4)
   127  	BNE	-2(PC)
   128  	ISYNC
   129  	MOVW	R3, ret+16(FP)
   130  	RET
   131  
   132  TEXT runtime∕internal∕atomic·Xchg64(SB), NOSPLIT, $0-24
   133  	MOVD	ptr+0(FP), R4
   134  	MOVD	new+8(FP), R5
   135  	SYNC
   136  	LDAR	(R4), R3
   137  	STDCCC	R5, (R4)
   138  	BNE	-2(PC)
   139  	ISYNC
   140  	MOVD	R3, ret+16(FP)
   141  	RET
   142  
   143  TEXT runtime∕internal∕atomic·Xchguintptr(SB), NOSPLIT, $0-24
   144  	BR	runtime∕internal∕atomic·Xchg64(SB)
   145  
   146  
   147  TEXT runtime∕internal∕atomic·StorepNoWB(SB), NOSPLIT, $0-16
   148  	BR	runtime∕internal∕atomic·Store64(SB)
   149  
   150  TEXT runtime∕internal∕atomic·Store(SB), NOSPLIT, $0-12
   151  	MOVD	ptr+0(FP), R3
   152  	MOVW	val+8(FP), R4
   153  	SYNC
   154  	MOVW	R4, 0(R3)
   155  	RET
   156  
   157  TEXT runtime∕internal∕atomic·Store64(SB), NOSPLIT, $0-16
   158  	MOVD	ptr+0(FP), R3
   159  	MOVD	val+8(FP), R4
   160  	SYNC
   161  	MOVD	R4, 0(R3)
   162  	RET
   163  
   164  // void runtime∕internal∕atomic·Or8(byte volatile*, byte);
   165  TEXT runtime∕internal∕atomic·Or8(SB), NOSPLIT, $0-9
   166  	MOVD	ptr+0(FP), R3
   167  	MOVBZ	val+8(FP), R4
   168  	SYNC
   169  again:
   170  	LBAR	(R3), R6
   171  	OR	R4, R6
   172  	STBCCC	R6, (R3)
   173  	BNE	again
   174  	ISYNC
   175  	RET
   176  
   177  // void runtime∕internal∕atomic·And8(byte volatile*, byte);
   178  TEXT runtime∕internal∕atomic·And8(SB), NOSPLIT, $0-9
   179  	MOVD	ptr+0(FP), R3
   180  	MOVBZ	val+8(FP), R4
   181  	SYNC
   182  again:
   183  	LBAR	(R3),R6
   184  	AND	R4,R6
   185  	STBCCC	R6,(R3)
   186  	BNE	again
   187  	ISYNC
   188  	RET