github.com/c9s/go@v0.0.0-20180120015821-984e81f64e0c/src/cmd/internal/obj/arm/list5.go (about)

     1  // Inferno utils/5c/list.c
     2  // https://bitbucket.org/inferno-os/inferno-os/src/default/utils/5c/list.c
     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 arm
    32  
    33  import (
    34  	"cmd/internal/obj"
    35  	"fmt"
    36  )
    37  
    38  func init() {
    39  	obj.RegisterRegister(obj.RBaseARM, MAXREG, rconv)
    40  	obj.RegisterOpcode(obj.ABaseARM, Anames)
    41  	obj.RegisterRegisterList(obj.RegListARMLo, obj.RegListARMHi, rlconv)
    42  }
    43  
    44  func rconv(r int) string {
    45  	if r == 0 {
    46  		return "NONE"
    47  	}
    48  	if r == REGG {
    49  		// Special case.
    50  		return "g"
    51  	}
    52  	if REG_R0 <= r && r <= REG_R15 {
    53  		return fmt.Sprintf("R%d", r-REG_R0)
    54  	}
    55  	if REG_F0 <= r && r <= REG_F15 {
    56  		return fmt.Sprintf("F%d", r-REG_F0)
    57  	}
    58  
    59  	switch r {
    60  	case REG_FPSR:
    61  		return "FPSR"
    62  
    63  	case REG_FPCR:
    64  		return "FPCR"
    65  
    66  	case REG_CPSR:
    67  		return "CPSR"
    68  
    69  	case REG_SPSR:
    70  		return "SPSR"
    71  	}
    72  
    73  	return fmt.Sprintf("Rgok(%d)", r-obj.RBaseARM)
    74  }
    75  
    76  func DRconv(a int) string {
    77  	s := "C_??"
    78  	if a >= C_NONE && a <= C_NCLASS {
    79  		s = cnames5[a]
    80  	}
    81  	var fp string
    82  	fp += s
    83  	return fp
    84  }
    85  
    86  func rlconv(list int64) string {
    87  	str := ""
    88  	for i := 0; i < 16; i++ {
    89  		if list&(1<<uint(i)) != 0 {
    90  			if str == "" {
    91  				str += "["
    92  			} else {
    93  				str += ","
    94  			}
    95  			// This is ARM-specific; R10 is g.
    96  			if i == REGG-REG_R0 {
    97  				str += "g"
    98  			} else {
    99  				str += fmt.Sprintf("R%d", i)
   100  			}
   101  		}
   102  	}
   103  
   104  	str += "]"
   105  	return str
   106  }