github.com/bananabytelabs/wazero@v0.0.0-20240105073314-54b22a776da8/internal/engine/wazevo/ssa/cmp.go (about)

     1  package ssa
     2  
     3  // IntegerCmpCond represents a condition for integer comparison.
     4  type IntegerCmpCond byte
     5  
     6  const (
     7  	// IntegerCmpCondInvalid represents an invalid condition.
     8  	IntegerCmpCondInvalid IntegerCmpCond = iota
     9  	// IntegerCmpCondEqual represents "==".
    10  	IntegerCmpCondEqual
    11  	// IntegerCmpCondNotEqual represents "!=".
    12  	IntegerCmpCondNotEqual
    13  	// IntegerCmpCondSignedLessThan represents Signed "<".
    14  	IntegerCmpCondSignedLessThan
    15  	// IntegerCmpCondSignedGreaterThanOrEqual represents Signed ">=".
    16  	IntegerCmpCondSignedGreaterThanOrEqual
    17  	// IntegerCmpCondSignedGreaterThan represents Signed ">".
    18  	IntegerCmpCondSignedGreaterThan
    19  	// IntegerCmpCondSignedLessThanOrEqual represents Signed "<=".
    20  	IntegerCmpCondSignedLessThanOrEqual
    21  	// IntegerCmpCondUnsignedLessThan represents Unsigned "<".
    22  	IntegerCmpCondUnsignedLessThan
    23  	// IntegerCmpCondUnsignedGreaterThanOrEqual represents Unsigned ">=".
    24  	IntegerCmpCondUnsignedGreaterThanOrEqual
    25  	// IntegerCmpCondUnsignedGreaterThan represents Unsigned ">".
    26  	IntegerCmpCondUnsignedGreaterThan
    27  	// IntegerCmpCondUnsignedLessThanOrEqual represents Unsigned "<=".
    28  	IntegerCmpCondUnsignedLessThanOrEqual
    29  )
    30  
    31  // String implements fmt.Stringer.
    32  func (i IntegerCmpCond) String() string {
    33  	switch i {
    34  	case IntegerCmpCondEqual:
    35  		return "eq"
    36  	case IntegerCmpCondNotEqual:
    37  		return "neq"
    38  	case IntegerCmpCondSignedLessThan:
    39  		return "lt_s"
    40  	case IntegerCmpCondSignedGreaterThanOrEqual:
    41  		return "ge_s"
    42  	case IntegerCmpCondSignedGreaterThan:
    43  		return "gt_s"
    44  	case IntegerCmpCondSignedLessThanOrEqual:
    45  		return "le_s"
    46  	case IntegerCmpCondUnsignedLessThan:
    47  		return "lt_u"
    48  	case IntegerCmpCondUnsignedGreaterThanOrEqual:
    49  		return "ge_u"
    50  	case IntegerCmpCondUnsignedGreaterThan:
    51  		return "gt_u"
    52  	case IntegerCmpCondUnsignedLessThanOrEqual:
    53  		return "le_u"
    54  	default:
    55  		panic("invalid integer comparison condition")
    56  	}
    57  }
    58  
    59  // Signed returns true if the condition is signed integer comparison.
    60  func (i IntegerCmpCond) Signed() bool {
    61  	switch i {
    62  	case IntegerCmpCondSignedLessThan, IntegerCmpCondSignedGreaterThanOrEqual,
    63  		IntegerCmpCondSignedGreaterThan, IntegerCmpCondSignedLessThanOrEqual:
    64  		return true
    65  	default:
    66  		return false
    67  	}
    68  }
    69  
    70  type FloatCmpCond byte
    71  
    72  const (
    73  	// FloatCmpCondInvalid represents an invalid condition.
    74  	FloatCmpCondInvalid FloatCmpCond = iota
    75  	// FloatCmpCondEqual represents "==".
    76  	FloatCmpCondEqual
    77  	// FloatCmpCondNotEqual represents "!=".
    78  	FloatCmpCondNotEqual
    79  	// FloatCmpCondLessThan represents "<".
    80  	FloatCmpCondLessThan
    81  	// FloatCmpCondLessThanOrEqual represents "<=".
    82  	FloatCmpCondLessThanOrEqual
    83  	// FloatCmpCondGreaterThan represents ">".
    84  	FloatCmpCondGreaterThan
    85  	// FloatCmpCondGreaterThanOrEqual represents ">=".
    86  	FloatCmpCondGreaterThanOrEqual
    87  )
    88  
    89  // String implements fmt.Stringer.
    90  func (f FloatCmpCond) String() string {
    91  	switch f {
    92  	case FloatCmpCondEqual:
    93  		return "eq"
    94  	case FloatCmpCondNotEqual:
    95  		return "neq"
    96  	case FloatCmpCondLessThan:
    97  		return "lt"
    98  	case FloatCmpCondLessThanOrEqual:
    99  		return "le"
   100  	case FloatCmpCondGreaterThan:
   101  		return "gt"
   102  	case FloatCmpCondGreaterThanOrEqual:
   103  		return "ge"
   104  	default:
   105  		panic("invalid float comparison condition")
   106  	}
   107  }