list9.go

     1  // cmd/9l/list.c from Vita Nuova.
     2  //
     3  //	Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
     4  //	Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
     5  //	Portions Copyright © 1997-1999 Vita Nuova Limited
     6  //	Portions Copyright © 2000-2008 Vita Nuova Holdings Limited (www.vitanuova.com)
     7  //	Portions Copyright © 2004,2006 Bruce Ellis
     8  //	Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
     9  //	Revisions Copyright © 2000-2008 Lucent Technologies Inc. and others
    10  //	Portions Copyright © 2009 The Go Authors. All rights reserved.
    11  //
    12  // Permission is hereby granted, free of charge, to any person obtaining a copy
    13  // of this software and associated documentation files (the "Software"), to deal
    14  // in the Software without restriction, including without limitation the rights
    15  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    16  // copies of the Software, and to permit persons to whom the Software is
    17  // furnished to do so, subject to the following conditions:
    18  //
    19  // The above copyright notice and this permission notice shall be included in
    20  // all copies or substantial portions of the Software.
    21  //
    22  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    23  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    24  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
    25  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    26  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    27  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    28  // THE SOFTWARE.
    29  
    30  package ppc64
    31  
    32  import (
    33  	"cmd/internal/obj"
    34  	"fmt"
    35  )
    36  
    37  func init() {
    38  	obj.RegisterRegister(obj.RBasePPC64, REG_SPR0+1024, rconv)
    39  	// Note, the last entry in Anames is "LASTAOUT", it is not a real opcode.
    40  	obj.RegisterOpcode(obj.ABasePPC64, Anames[:len(Anames)-1])
    41  	obj.RegisterOpcode(AFIRSTGEN, GenAnames)
    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_R31 {
    53  		return fmt.Sprintf("R%d", r-REG_R0)
    54  	}
    55  	if REG_F0 <= r && r <= REG_F31 {
    56  		return fmt.Sprintf("F%d", r-REG_F0)
    57  	}
    58  	if REG_V0 <= r && r <= REG_V31 {
    59  		return fmt.Sprintf("V%d", r-REG_V0)
    60  	}
    61  	if REG_VS0 <= r && r <= REG_VS63 {
    62  		return fmt.Sprintf("VS%d", r-REG_VS0)
    63  	}
    64  	if REG_CR0 <= r && r <= REG_CR7 {
    65  		return fmt.Sprintf("CR%d", r-REG_CR0)
    66  	}
    67  	if REG_CR0LT <= r && r <= REG_CR7SO {
    68  		bits := [4]string{"LT", "GT", "EQ", "SO"}
    69  		crf := (r - REG_CR0LT) / 4
    70  		return fmt.Sprintf("CR%d%s", crf, bits[r%4])
    71  	}
    72  	if REG_A0 <= r && r <= REG_A7 {
    73  		return fmt.Sprintf("A%d", r-REG_A0)
    74  	}
    75  	if r == REG_CR {
    76  		return "CR"
    77  	}
    78  	if REG_SPR0 <= r && r <= REG_SPR0+1023 {
    79  		switch r {
    80  		case REG_XER:
    81  			return "XER"
    82  
    83  		case REG_LR:
    84  			return "LR"
    85  
    86  		case REG_CTR:
    87  			return "CTR"
    88  		}
    89  
    90  		return fmt.Sprintf("SPR(%d)", r-REG_SPR0)
    91  	}
    92  
    93  	if r == REG_FPSCR {
    94  		return "FPSCR"
    95  	}
    96  	if r == REG_MSR {
    97  		return "MSR"
    98  	}
    99  
   100  	return fmt.Sprintf("Rgok(%d)", r-obj.RBasePPC64)
   101  }
   102  
   103  func DRconv(a int) string {
   104  	s := "C_??"
   105  	if a >= C_NONE && a <= C_NCLASS {
   106  		s = cnames9[a]
   107  	}
   108  	var fp string
   109  	fp += s
   110  	return fp
   111  }
   112  
   113  func ConstantToCRbit(c int64) (int16, bool) {
   114  	reg64 := REG_CRBIT0 + c
   115  	success := reg64 >= REG_CR0LT && reg64 <= REG_CR7SO
   116  	return int16(reg64), success
   117  }
   118
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