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annotate src/number.s @ 125:0607e4e20702

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Correct offset error for keyword table lookup
author William Astle <lost@l-w.ca>
date Sun, 07 Jan 2024 20:35:51 -0700
parents 2f97bfecffab
children 9d57279c900e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 *pragmapush list
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2 *pragma list
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3 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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4 ; Arithmetic package
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5 ;
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6 ; This section contains routines that handle floating point and integer arithmetic. It mostly delegates to int.s and
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7 ; fps.s.
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8 ;
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9 ; Most of these routines take a single parameter in val0 or two parameters in val0 and val1. They will typically return
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10 ; their results in val0.
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11 ;
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12 ; For binary operations, the left operand will be in val1 and the right operand will be in val0.
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13 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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14 ; Match operands for a numeric calculation. This works as follows:
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15 ;
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16 ; * If both operands are the same, ensure the type is numeric and return
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17 ; * If one operand is floating point, convert the other to floating point, as long as it is numeric
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18 ; * If one or both operands are not numeric, raise a type mismatch
101
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19 ; The operands are in val0 and val1
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20 val_matchtypes ldb val0+val.type ; get the type of first argument
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21 cmpb val1+val.type ; do types match?
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22 bne val_matchtypes1 ; brif not
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23 cmpb #valtype_int ; integer?
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24 beq val_matchtypes0 ; brif so - it's good
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25 cmpb #valtype_float ; floating point?
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26 bne TMERROR ; brif not
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27 val_matchtypes0 rts ; types match and are good
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28 TMERROR ldb #err_tm ; raise a type mismatch
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29 jmp ERROR
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30 val_matchtypes1 cmpb #valtype_float ; is first argument float?
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31 bne val_matchtypes2 ; brif not
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32 ldb val1+val.type ; get second type
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33 cmpb #valtype_int ; is it integer?
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34 bne TMERROR ; brif not - don't know how to convert
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35 ldx #val1 ; go convert val1 to floating point
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36 jmp fps_fromint
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37 val_matchtypes2 cmpb #valtype_int ; are we an integer?
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38 bne TMERROR ; brif not - we don't know how to convert
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39 ldb val1+val.type ; get second type
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40 cmpb #valtype_float ; is it floating point?
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41 bne TMERROR ; brif not - we don't know how to convert
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42 ldx #val0 ; convert val0 to floating point
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43 jmp fps_fromint
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44 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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45 ; Parse a number to either an integer or a floating point value and return the result in val0
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46 ;
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47 ; This works by first detecting any sign indicators and handling those. Multiple prefix signs are supported. Note that
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48 ; in the regular expression evaluation sequence, unary minus and plus will be handled by the expression evaluator so
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49 ; in that case, the number evaluator would not need to care about those. However, in the case of an arbitrary string
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50 ; fed into the evaluator, those must be handled. Note that there is no need to handle tokenized sign indicators because
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51 ; the only place where they would be tokenized is in a proper expression.
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52 ;
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53 ; Once leading signs are handled, any base specifiers or other modifiers are handled. If none of those intercept the
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54 ; parsing, the regular number parsing continues as follows.
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55 ;
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56 ; 1. Read a sequence of digits. The digits are stored in backed BCD form in the significand of fpa0. An arbitrary number
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57 ; of leading zeroes will be skipped. A count of significant digits is maintained while reading digits as is the
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58 ; position of a decimal point if one is encountered. Once one digit more than the maximum possible precision of any
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59 ; supported number type is read, subsequent digits will not be stored, but the counters will still be updated.
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60 ; 2. Any subsequent "E" or "e" followed by either a positive or negative decimal exponent is read, with the sign
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61 ; indicator being optional.
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62 ; 3. The decimal offset calculated in (1) is adjusted by the exponent read in (2) if any.
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63 ; 4. Range checks are completed as follows:
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64 ; 4a. If the calculated decimal exponent is beyond the supported range of any floating point or integer type, raise
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65 ; an overflow error.
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66 ; 4b. If the number is an integer in the range of -0x80000000 to 0x7fffffff, it is converted to a signed binary integer
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67 ; and the result is returned
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68 ; 4b. Set the exponent correctly then normalize the result to val0
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69 val_parsenum ldd zero ; zero out digit accumulator
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70 std fpa0+fpa.sig
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71 std fpa0+fpa.sig+2
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72 std fpa0+fpa.sig+4
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73 std fpa0+fpa.sig+6
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74 std fpa0+fpa.sig+8
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75 sta fpa0+fpa.sign ; set number sign to positive
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76 std fpaextra+4 ; clear out decimal exponent and sign
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77 std fpaextra ; set digit count and decimal flag to zero and no decimal
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78 sta fpaextra+2 ; set decimal position to 0 - unused if decimal not seen
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79 sta fpaextra+6 ; set number of leading zeroes seen
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80 ldx #fpa0+fpa.sig ; point to digit storage location
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81 lda #0xf0 ; set digit mask
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82 sta fpaextra+3
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83 jsr curchar ; get back current input
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84 bne val_parsenum1 ; brif we have input
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85 jmp SNERROR ; raise syntax error
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86 val_parsenum0 jsr nextchar ; fetch next input
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87 val_parsenum1 bcs val_parsenum3 ; brif digit - short ciruit other checks
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88 cmpa #'. ; does it start with a decimal?
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89 beq val_parsenum5a ; brif so
85
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90 cmpa #'+ ; unary plus?
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91 beq val_parsenum0 ; brif so - it's a no-op but supported for symmetry with unary minus
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92 cmpa #'- ; negative?
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93 bne val_parsenum5 ; brif not
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94 com fpa0+fpa.sign ; invert the sign
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95 bra val_parsenum0 ; eat the sign and see if there's more signs
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96 val_parsenum1a inc fpaextra+6 ; bump zero counter
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97 val_parsenum2 jsr nextchar ; fetch next character in number
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98 bcc val_parsenum5 ; brif not a digit
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99 val_parsenum3 ldb fpaextra ; is it within the digit count?
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100 cmpb #11 ; (11 digits holds both 10 digit fp and 32 bit integer)
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101 bhs val_parsenum4 ; brif so - don't convert it
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102 suba #0x30 ; binary-ize the digit
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103 bne val_parsenum3a ; brif not zero
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104 tstb ; no digits?
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105 bne val_parsenum3a ; brif not - we've seen something significant
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106 ldb fpaextra+1 ; decimal seen?
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107 bne val_parsenum1a ; brif so - count the leading zeros
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108 bra val_parsenum2 ; otherwise don't count it and skip it
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109 val_parsenum3a ldb #0x11 ; put in both digit spots
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110 mul
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111 andb fpaextra+3 ; only keep the one we need
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112 orb ,x ; merge with existing digit
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113 stb ,x ; put in digit location
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114 com fpaextra+3 ; flip digit position mask
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115 bpl val_parsenum4 ; brif not moving to new location
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116 leax 1,x ; move to new digit storage location
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117 val_parsenum4 inc fpaextra ; bump digit count
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118 bmi val_overror ; brif it overflowed - we can't parse more than 127 digits!
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119 bra val_parsenum2 ; go handle another digit or whatever
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120 val_parsenum5 cmpa #'. ; decimal?
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121 bne val_parsenum6 ; brif not
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122 val_parsenum5a ldb fpaextra ;* set decimal offset (digits to the left of decimal), account for
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123 stb fpaextra+2
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124 com fpaextra+1 ; flag decimal seen
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125 lbeq SNERROR ; brif already seen a decimal point - syntax error
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diff changeset
126 bra val_parsenum2 ; process more digits
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
127 val_parsenum6 ldb fpaextra ; get number of digits provided; will be exponent if no decimal
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
128 tst fpaextra+1 ; decimal seen?
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
129 beq val_parsenum6a ; brif not
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
130 ldb fpaextra+2 ; get decimal offset - this is the exponent
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
131 val_parsenum6a decb ; adjust for the decimal position in the significand
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
132 subb fpaextra+6 ; account for leading zeroes after the decimal point
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
133 bvs val_overror ; brif it overflowed
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
134 stb fpa0+fpa.exp ; save base exponent of number
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
135 cmpa #'E ; decimal exponent?
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
136 beq val_parsenum7 ; brif so
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
137 cmpa #'e ; lower case exponent indicator?
94
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
138 bne val_parsenum11b ; brif not - we have the end of the number here
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
139 val_parsenum7 jsr nextchar ; eat exponent indicator
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
140 bcs val_parsenum9 ; brif digit
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
141 cmpa #'+ ; positive?
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
142 beq val_parsenum8 ; brif no
93
a4db504611e2 Handle tokenized signs parsing E notation
William Astle <lost@l-w.ca>
parents: 88
diff changeset
143 cmpa #tok_plus ; tokenized plus?
a4db504611e2 Handle tokenized signs parsing E notation
William Astle <lost@l-w.ca>
parents: 88
diff changeset
144 beq val_parsenum8 ; brif so
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
145 cmpa #'- ; negative?
93
a4db504611e2 Handle tokenized signs parsing E notation
William Astle <lost@l-w.ca>
parents: 88
diff changeset
146 beq val_parsenum7a ; brif so
a4db504611e2 Handle tokenized signs parsing E notation
William Astle <lost@l-w.ca>
parents: 88
diff changeset
147 cmpa #tok_minus ; tokenized minus?
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
148 lbne SNERROR ; brif not positive, negative, or digit
93
a4db504611e2 Handle tokenized signs parsing E notation
William Astle <lost@l-w.ca>
parents: 88
diff changeset
149 val_parsenum7a com fpaextra+5 ; make sign of exponent negative
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
150 val_parsenum8 jsr nextchar ; eat exponent sign/get next digit
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
151 bcc val_parsenum10 ; brif not a digit - done with number
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
152 val_parsenum9 suba #0x30 ; binary-ize the digit
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
153 sta fpaextra+6 ; save digit value
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
154 ldb fpaextra+4 ; get calculated exponent
94
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
155 lda #10 ; multiply by 10, MUL sets C equal to bit 7 of B
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
156 mul
94
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
157 bcc val_parsenum9a ; don't brif ±127 - we just don't handle that
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
158 val_overror jmp OVERROR ; raise overflow
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
159 val_parsenum9a addb fpaextra+6 ; add digit in
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
160 bvs val_overror ; brif we went above 63
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
161 stb fpaextra+4 ; save new decimal exponent
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
162 bra val_parsenum8 ; handle another digit
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
163 val_parsenum10 lda fpaextra+5 ; get sign of exponent
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
164 bpl val_parsenum11 ; brif positive
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
165 neg fpaextra+4 ; negate resulting exponent
94
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
166 val_parsenum11 ldb fpa0+fpa.exp ; get significand exponent
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
167 addb fpaextra+4 ; add in decimal exponent adjustment
94
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
168 bvs val_overror ; brif it overflowed
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
169 stb fpa0+fpa.exp
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
170 val_parsenum11b cmpb #63 ; too high?
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
171 bgt val_overror ; brif too high
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
172 cmpb #-64 ; too low?
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
173 bge val_parsenum11a ; brif so - minimize to "0"
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
174 ldb #valtype_int ; set result to integer
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
175 stb val0+val.type
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William Astle <lost@l-w.ca>
parents: 93
diff changeset
176 ldd zero ; set result to zero
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William Astle <lost@l-w.ca>
parents: 93
diff changeset
177 std val0+val.int
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William Astle <lost@l-w.ca>
parents: 93
diff changeset
178 std val0+val.int+2
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
179 rts
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
180 ; Normalization is not required here though rounding might be. Rounding will be handled during floating point return.
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
181 ; By ensuring there were no leading zeroes converted, the result is already pre-normalized without losing precision due
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
182 ; to an aribtrary number of leading zeroes.
95
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
183 val_parsenum11a cmpb #9 ; is the exponent greater than possible for a 32 bit integer?
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
184 bgt val_parsenum13
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
185 lda fpaextra ; fetch the number of digits
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
186 deca ; account for the decimal point offset
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
187 cmpa fpa0+fpa.exp ; do we have more digits than the exponent (fractional)?
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
188 bgt val_parsenum13 ; brif we have more digits than exponent
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
189 ; Compare with 2147483648, the maximum *negative* value; note that this is a floating point comparison because we
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
190 ; already normalized everything above and it handles exponents properly
95
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
191 lda fpa0+fpa.exp ; compare exponents (unbiased)
25b44f1ac2aa Fix detection of integer value on ascii conversion
William Astle <lost@l-w.ca>
parents: 94
diff changeset
192 cmpa #9
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
193 bne val_parsenum12
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
194 ldx fpa0+fpa.sig ; compare top of significand
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
195 cmpx #0x2147
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William Astle <lost@l-w.ca>
parents: 84
diff changeset
196 bne val_parsenum12
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William Astle <lost@l-w.ca>
parents: 84
diff changeset
197 ldx fpa0+fpa.sig+2 ; compare middle of significand
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
198 cmpx #0x4836
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
199 bne val_parsenum12
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
200 ldx fpa0+fpa.sig+4 ; compare bottom of significand plus extra digits
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
201 cmpx #0x4800
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
202 val_parsenum12 bgt val_parsenum13 ; brif too big for integer
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
203 blt val_parsenum14 ; brif it fits in a positive integer
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
204 ldb fpa0+fpa.sign ; negative?
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
205 bpl val_parsenum14 ; brif not - doesn't fit in integer
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
206 val_parsenum13 lda #valtype_float ; set return value to floating point
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
207 sta val0+val.type
94
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
208 lda fpa0+fpa.exp ; put the bias into the exponent
5fa8c479dbf7 Make E notation parse correctly, and also leading decimals, and other details
William Astle <lost@l-w.ca>
parents: 93
diff changeset
209 adda #64
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
210 sta fpa0+fpa.exp
98
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
211 jsr fps_normalizea0 ; normalize fpa0
100
6db72a92ff7a Make value accumulator descriptions consistent and make usage consistent
William Astle <lost@l-w.ca>
parents: 98
diff changeset
212 ldx #val0 ; pack the result to the right place and return
6db72a92ff7a Make value accumulator descriptions consistent and make usage consistent
William Astle <lost@l-w.ca>
parents: 98
diff changeset
213 jmp fps_pack0
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
214 val_parsenum14 lda #valtype_int ; set value type to integer
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
215 sta val0+val.type
98
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
216 ldb fpa0+fpa.exp ; add the exponent bias in
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
217 addb #64
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
218 stb fpa0+fpa.exp
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
219 jsr fps_toint1 ; go convert to an integer
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
220 ldd fpa0+fpa.sig+1 ; copy result to val0
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
221 std val0+val.int
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
222 ldd fpa0+fpa.sig+3
85
663d8e77b579 Implmement BCD floating point and update number parsing and printing
William Astle <lost@l-w.ca>
parents: 84
diff changeset
223 std val0+val.int+2
98
6837d10b67fb Add integer <-> float conversion routines and combine some code for parsing
William Astle <lost@l-w.ca>
parents: 95
diff changeset
224 rts
76
eb2681108660 Split some code into separate files for easier management (4)
William Astle <lost@l-w.ca>
parents:
diff changeset
225 *pragmapop list