74d744dd00
Adding the proposed recognizers vocabulary, including a limited test. Fixing windows build to better handle different VS versions. Fixing various hidden word bugs. Adding 3DUP opcode. Bumping version number.
50 lines
1.5 KiB
Forth
50 lines
1.5 KiB
Forth
\ Copyright 2021 Bradley D. Nelson
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\
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\ Licensed under the Apache License, Version 2.0 (the "License");
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\ you may not use this file except in compliance with the License.
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\ You may obtain a copy of the License at
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\
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\ http://www.apache.org/licenses/LICENSE-2.0
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\
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\ Unless required by applicable law or agreed to in writing, software
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\ distributed under the License is distributed on an "AS IS" BASIS,
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\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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\ See the License for the specific language governing permissions and
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\ limitations under the License.
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: sf, ( r -- ) here sf! sfloat allot ;
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: afliteral ( r -- ) ['] DOFLIT , sf, align ;
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: fliteral afliteral ; immediate
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: fconstant ( r "name" ) create sf, align does> sf@ ;
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: fvariable ( "name" ) create sfloat allot align ;
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6 value precision
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: set-precision ( n -- ) to precision ;
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( Add recognizer for floats. )
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also recognizers definitions
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: REC-FNUM ( c-addr len -- f addr1 | addr2 )
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s>float? if
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['] afliteral RECTYPE-NUM
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else
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RECTYPE-NONE
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then
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;
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' REC-FNUM +RECOGNIZER
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previous definitions
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internals definitions
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: #f+s ( r -- ) fdup precision for aft 10e f* then next
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precision for aft fdup f>s 10 mod [char] 0 + hold 0.1e f* then next
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[char] . hold fdrop f>s #s ;
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forth definitions internals
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: #fs ( r -- ) fdup f0< if fnegate #f+s [char] - hold else #f+s then ;
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: f. ( r -- ) <# #fs #> type space ;
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: f.s ." <" fdepth n. ." > "
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fdepth 0 max for aft fp@ r@ sfloats - sf@ f. then next ;
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forth definitions
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