list7.go

Documentation: cmd/internal/obj/arm64

     1  // cmd/7l/list.c and cmd/7l/sub.c from Vita Nuova.
     2  // https://code.google.com/p/ken-cc/source/browse/
     3  //
     4  // 	Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
     5  // 	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
     6  // 	Portions Copyright © 1997-1999 Vita Nuova Limited
     7  // 	Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
     8  // 	Portions Copyright © 2004,2006 Bruce Ellis
     9  // 	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
    10  // 	Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
    11  // 	Portions Copyright © 2009 The Go Authors. All rights reserved.
    12  //
    13  // Permission is hereby granted, free of charge, to any person obtaining a copy
    14  // of this software and associated documentation files (the "Software"), to deal
    15  // in the Software without restriction, including without limitation the rights
    16  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    17  // copies of the Software, and to permit persons to whom the Software is
    18  // furnished to do so, subject to the following conditions:
    19  //
    20  // The above copyright notice and this permission notice shall be included in
    21  // all copies or substantial portions of the Software.
    22  //
    23  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    24  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    25  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
    26  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    27  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    28  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    29  // THE SOFTWARE.
    30  
    31  package arm64
    32  
    33  import (
    34  	"cmd/internal/obj"
    35  	"fmt"
    36  )
    37  
    38  var strcond = [16]string{
    39  	"EQ",
    40  	"NE",
    41  	"HS",
    42  	"LO",
    43  	"MI",
    44  	"PL",
    45  	"VS",
    46  	"VC",
    47  	"HI",
    48  	"LS",
    49  	"GE",
    50  	"LT",
    51  	"GT",
    52  	"LE",
    53  	"AL",
    54  	"NV",
    55  }
    56  
    57  func init() {
    58  	obj.RegisterRegister(obj.RBaseARM64, REG_SPECIAL+1024, rconv)
    59  	obj.RegisterOpcode(obj.ABaseARM64, Anames)
    60  	obj.RegisterRegisterList(obj.RegListARM64Lo, obj.RegListARM64Hi, rlconv)
    61  	obj.RegisterOpSuffix("arm64", obj.CConvARM)
    62  }
    63  
    64  func arrange(a int) string {
    65  	switch a {
    66  	case ARNG_8B:
    67  		return "B8"
    68  	case ARNG_16B:
    69  		return "B16"
    70  	case ARNG_4H:
    71  		return "H4"
    72  	case ARNG_8H:
    73  		return "H8"
    74  	case ARNG_2S:
    75  		return "S2"
    76  	case ARNG_4S:
    77  		return "S4"
    78  	case ARNG_1D:
    79  		return "D1"
    80  	case ARNG_2D:
    81  		return "D2"
    82  	case ARNG_B:
    83  		return "B"
    84  	case ARNG_H:
    85  		return "H"
    86  	case ARNG_S:
    87  		return "S"
    88  	case ARNG_D:
    89  		return "D"
    90  	case ARNG_1Q:
    91  		return "Q1"
    92  	default:
    93  		return ""
    94  	}
    95  }
    96  
    97  func rconv(r int) string {
    98  	ext := (r >> 5) & 7
    99  	if r == REGG {
   100  		return "g"
   101  	}
   102  	switch {
   103  	case REG_R0 <= r && r <= REG_R30:
   104  		return fmt.Sprintf("R%d", r-REG_R0)
   105  	case r == REG_R31:
   106  		return "ZR"
   107  	case REG_F0 <= r && r <= REG_F31:
   108  		return fmt.Sprintf("F%d", r-REG_F0)
   109  	case REG_V0 <= r && r <= REG_V31:
   110  		return fmt.Sprintf("V%d", r-REG_V0)
   111  	case COND_EQ <= r && r <= COND_NV:
   112  		return strcond[r-COND_EQ]
   113  	case r == REGSP:
   114  		return "RSP"
   115  	case r == REG_DAIFSet:
   116  		return "DAIFSet"
   117  	case r == REG_DAIFClr:
   118  		return "DAIFClr"
   119  	case r == REG_PLDL1KEEP:
   120  		return "PLDL1KEEP"
   121  	case r == REG_PLDL1STRM:
   122  		return "PLDL1STRM"
   123  	case r == REG_PLDL2KEEP:
   124  		return "PLDL2KEEP"
   125  	case r == REG_PLDL2STRM:
   126  		return "PLDL2STRM"
   127  	case r == REG_PLDL3KEEP:
   128  		return "PLDL3KEEP"
   129  	case r == REG_PLDL3STRM:
   130  		return "PLDL3STRM"
   131  	case r == REG_PLIL1KEEP:
   132  		return "PLIL1KEEP"
   133  	case r == REG_PLIL1STRM:
   134  		return "PLIL1STRM"
   135  	case r == REG_PLIL2KEEP:
   136  		return "PLIL2KEEP"
   137  	case r == REG_PLIL2STRM:
   138  		return "PLIL2STRM"
   139  	case r == REG_PLIL3KEEP:
   140  		return "PLIL3KEEP"
   141  	case r == REG_PLIL3STRM:
   142  		return "PLIL3STRM"
   143  	case r == REG_PSTL1KEEP:
   144  		return "PSTL1KEEP"
   145  	case r == REG_PSTL1STRM:
   146  		return "PSTL1STRM"
   147  	case r == REG_PSTL2KEEP:
   148  		return "PSTL2KEEP"
   149  	case r == REG_PSTL2STRM:
   150  		return "PSTL2STRM"
   151  	case r == REG_PSTL3KEEP:
   152  		return "PSTL3KEEP"
   153  	case r == REG_PSTL3STRM:
   154  		return "PSTL3STRM"
   155  	case REG_UXTB <= r && r < REG_UXTH:
   156  		if ext != 0 {
   157  			return fmt.Sprintf("%s.UXTB<<%d", regname(r), ext)
   158  		} else {
   159  			return fmt.Sprintf("%s.UXTB", regname(r))
   160  		}
   161  	case REG_UXTH <= r && r < REG_UXTW:
   162  		if ext != 0 {
   163  			return fmt.Sprintf("%s.UXTH<<%d", regname(r), ext)
   164  		} else {
   165  			return fmt.Sprintf("%s.UXTH", regname(r))
   166  		}
   167  	case REG_UXTW <= r && r < REG_UXTX:
   168  		if ext != 0 {
   169  			return fmt.Sprintf("%s.UXTW<<%d", regname(r), ext)
   170  		} else {
   171  			return fmt.Sprintf("%s.UXTW", regname(r))
   172  		}
   173  	case REG_UXTX <= r && r < REG_SXTB:
   174  		if ext != 0 {
   175  			return fmt.Sprintf("%s.UXTX<<%d", regname(r), ext)
   176  		} else {
   177  			return fmt.Sprintf("%s.UXTX", regname(r))
   178  		}
   179  	case REG_SXTB <= r && r < REG_SXTH:
   180  		if ext != 0 {
   181  			return fmt.Sprintf("%s.SXTB<<%d", regname(r), ext)
   182  		} else {
   183  			return fmt.Sprintf("%s.SXTB", regname(r))
   184  		}
   185  	case REG_SXTH <= r && r < REG_SXTW:
   186  		if ext != 0 {
   187  			return fmt.Sprintf("%s.SXTH<<%d", regname(r), ext)
   188  		} else {
   189  			return fmt.Sprintf("%s.SXTH", regname(r))
   190  		}
   191  	case REG_SXTW <= r && r < REG_SXTX:
   192  		if ext != 0 {
   193  			return fmt.Sprintf("%s.SXTW<<%d", regname(r), ext)
   194  		} else {
   195  			return fmt.Sprintf("%s.SXTW", regname(r))
   196  		}
   197  	case REG_SXTX <= r && r < REG_SPECIAL:
   198  		if ext != 0 {
   199  			return fmt.Sprintf("%s.SXTX<<%d", regname(r), ext)
   200  		} else {
   201  			return fmt.Sprintf("%s.SXTX", regname(r))
   202  		}
   203  	// bits 0-4 indicate register, bits 5-7 indicate shift amount, bit 8 equals to 0.
   204  	case REG_LSL <= r && r < (REG_LSL+1<<8):
   205  		return fmt.Sprintf("R%d<<%d", r&31, (r>>5)&7)
   206  	case REG_ARNG <= r && r < REG_ELEM:
   207  		return fmt.Sprintf("V%d.%s", r&31, arrange((r>>5)&15))
   208  	case REG_ELEM <= r && r < REG_ELEM_END:
   209  		return fmt.Sprintf("V%d.%s", r&31, arrange((r>>5)&15))
   210  	}
   211  	// Return system register name.
   212  	name, _, _ := SysRegEnc(int16(r))
   213  	if name != "" {
   214  		return name
   215  	}
   216  	return fmt.Sprintf("badreg(%d)", r)
   217  }
   218  
   219  func DRconv(a int) string {
   220  	if a >= C_NONE && a <= C_NCLASS {
   221  		return cnames7[a]
   222  	}
   223  	return "C_??"
   224  }
   225  
   226  func rlconv(list int64) string {
   227  	str := ""
   228  
   229  	// ARM64 register list follows ARM64 instruction decode schema
   230  	// | 31 | 30 | ... | 15 - 12 | 11 - 10 | ... |
   231  	// +----+----+-----+---------+---------+-----+
   232  	// |    | Q  | ... | opcode  |   size  | ... |
   233  
   234  	firstReg := int(list & 31)
   235  	opcode := (list >> 12) & 15
   236  	var regCnt int
   237  	var t string
   238  	switch opcode {
   239  	case 0x7:
   240  		regCnt = 1
   241  	case 0xa:
   242  		regCnt = 2
   243  	case 0x6:
   244  		regCnt = 3
   245  	case 0x2:
   246  		regCnt = 4
   247  	default:
   248  		regCnt = -1
   249  	}
   250  	// Q:size
   251  	arng := ((list>>30)&1)<<2 | (list>>10)&3
   252  	switch arng {
   253  	case 0:
   254  		t = "B8"
   255  	case 4:
   256  		t = "B16"
   257  	case 1:
   258  		t = "H4"
   259  	case 5:
   260  		t = "H8"
   261  	case 2:
   262  		t = "S2"
   263  	case 6:
   264  		t = "S4"
   265  	case 3:
   266  		t = "D1"
   267  	case 7:
   268  		t = "D2"
   269  	}
   270  	for i := 0; i < regCnt; i++ {
   271  		if str == "" {
   272  			str += "["
   273  		} else {
   274  			str += ","
   275  		}
   276  		str += fmt.Sprintf("V%d.", (firstReg+i)&31)
   277  		str += t
   278  	}
   279  	str += "]"
   280  	return str
   281  }
   282  
   283  func regname(r int) string {
   284  	if r&31 == 31 {
   285  		return "ZR"
   286  	}
   287  	return fmt.Sprintf("R%d", r&31)
   288  }
   289
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