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*Mon Sep 21 15:32:56 2009 UTC* (11 years, 1 month ago) by *anton*

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CVS tags: HEAD

Revision

Branches: MAIN

CVS tags: HEAD

removed HEX usage

1: \ This file contains the code for ttester, a utility for testing Forth words, 2: \ as developed by several authors (see below), together with some explanations 3: \ of its use. 4: 5: \ ttester is based on the original tester suite by Hayes: 6: \ From: John Hayes S1I 7: \ Subject: tester.fr 8: \ Date: Mon, 27 Nov 95 13:10:09 PST 9: \ (C) 1995 JOHNS HOPKINS UNIVERSITY / APPLIED PHYSICS LABORATORY 10: \ MAY BE DISTRIBUTED FREELY AS LONG AS THIS COPYRIGHT NOTICE REMAINS. 11: \ VERSION 1.1 12: \ All the subsequent changes have been placed in the public domain. 13: \ The primary changes from the original are the replacement of "{" by "T{" 14: \ and "}" by "}T" (to avoid conflicts with the uses of { for locals and } 15: \ for FSL arrays), modifications so that the stack is allowed to be non-empty 16: \ before T{, and extensions for the handling of floating point tests. 17: \ Code for testing equality of floating point values comes 18: \ from ftester.fs written by David N. Williams, based on the idea of 19: \ approximate equality in Dirk Zoller's float.4th. 20: \ Further revisions were provided by Anton Ertl, including the ability 21: \ to handle either integrated or separate floating point stacks. 22: \ Revision history and possibly newer versions can be found at 23: \ http://www.complang.tuwien.ac.at/cvsweb/cgi-bin/cvsweb/gforth/test/ttester.fs 24: \ Explanatory material and minor reformatting (no code changes) by 25: \ C. G. Montgomery March 2009, with helpful comments from David Williams 26: \ and Krishna Myneni. 27: 28: \ Usage: 29: 30: \ The basic usage takes the form T{ <code> -> <expected stack> }T . 31: \ This executes <code> and compares the resulting stack contents with 32: \ the <expected stack> values, and reports any discrepancy between the 33: \ two sets of values. 34: \ For example: 35: \ T{ 1 2 3 swap -> 1 3 2 }T ok 36: \ T{ 1 2 3 swap -> 1 2 2 }T INCORRECT RESULT: T{ 1 2 3 swap -> 1 2 2 }T ok 37: \ T{ 1 2 3 swap -> 1 2 }T WRONG NUMBER OF RESULTS: T{ 1 2 3 swap -> 1 2 }T ok 38: 39: \ Floating point testing can involve further complications. The code 40: \ attempts to determine whether floating-point support is present, and 41: \ if so, whether there is a separate floating-point stack, and behave 42: \ accordingly. The CONSTANTs HAS-FLOATING and HAS-FLOATING-STACK 43: \ contain the results of its efforts, so the behavior of the code can 44: \ be modified by the user if necessary. 45: 46: \ Then there are the perennial issues of floating point value 47: \ comparisons. Exact equality is specified by SET-EXACT (the 48: \ default). If approximate equality tests are desired, execute 49: \ SET-NEAR . Then the FVARIABLEs REL-NEAR (default 1E-12) and 50: \ ABS-NEAR (default 0E) contain the values to be used in comparisons 51: \ by the (internal) word FNEARLY= . 52: 53: \ When there is not a separate floating point stack and you want to 54: \ use approximate equality for FP values, it is necessary to identify 55: \ which stack items are floating point quantities. This can be done 56: \ by replacing the closing }T with a version that specifies this, such 57: \ as RRXR}T which identifies the stack picture ( r r x r ). The code 58: \ provides such words for all combinations of R and X with up to four 59: \ stack items. They can be used with either an integrated or separate 60: \ floating point stacks. Adding more if you need them is 61: \ straightforward; see the examples in the source. Here is an example 62: \ which also illustrates controlling the precision of comparisons: 63: 64: \ SET-NEAR 65: \ 1E-6 REL-NEAR F! 66: \ T{ S" 3.14159E" >FLOAT -> -1E FACOS TRUE RX}T 67: 68: \ The word ERROR is now vectored, so that its action can be changed by 69: \ the user (for example, to add a counter for the number of errors). 70: \ The default action ERROR1 can be used as a factor in the display of 71: \ error reports. 72: 73: \ Loading ttester.fs does not change BASE. Remember that floating point input 74: \ is ambiguous if the base is not decimal. 75: 76: \ The file defines some 70 words in all, but in most cases only the 77: \ ones mentioned above will be needed for successful testing. 78: 79: BASE @ 80: DECIMAL 81: 82: VARIABLE ACTUAL-DEPTH \ stack record 83: CREATE ACTUAL-RESULTS 32 CELLS ALLOT 84: VARIABLE START-DEPTH 85: VARIABLE XCURSOR \ for ...}T 86: VARIABLE ERROR-XT 87: 88: : ERROR ERROR-XT @ EXECUTE ; \ for vectoring of error reporting 89: 90: : "FLOATING" S" FLOATING" ; \ only compiled S" in CORE 91: : "FLOATING-STACK" S" FLOATING-STACK" ; 92: "FLOATING" ENVIRONMENT? [IF] 93: [IF] 94: TRUE 95: [ELSE] 96: FALSE 97: [THEN] 98: [ELSE] 99: FALSE 100: [THEN] CONSTANT HAS-FLOATING 101: "FLOATING-STACK" ENVIRONMENT? [IF] 102: [IF] 103: TRUE 104: [ELSE] 105: FALSE 106: [THEN] 107: [ELSE] \ We don't know whether the FP stack is separate. 108: HAS-FLOATING \ If we have FLOATING, we assume it is. 109: [THEN] CONSTANT HAS-FLOATING-STACK 110: 111: HAS-FLOATING [IF] 112: \ Set the following to the relative and absolute tolerances you 113: \ want for approximate float equality, to be used with F~ in 114: \ FNEARLY=. Keep the signs, because F~ needs them. 115: FVARIABLE REL-NEAR 1E-12 REL-NEAR F! 116: FVARIABLE ABS-NEAR 0E ABS-NEAR F! 117: 118: \ When EXACT? is TRUE, }F uses FEXACTLY=, otherwise FNEARLY=. 119: 120: TRUE VALUE EXACT? 121: : SET-EXACT ( -- ) TRUE TO EXACT? ; 122: : SET-NEAR ( -- ) FALSE TO EXACT? ; 123: 124: : FEXACTLY= ( F: X Y -- S: FLAG ) 125: ( 126: Leave TRUE if the two floats are identical. 127: ) 128: 0E F~ ; 129: 130: : FABS= ( F: X Y -- S: FLAG ) 131: ( 132: Leave TRUE if the two floats are equal within the tolerance 133: stored in ABS-NEAR. 134: ) 135: ABS-NEAR F@ F~ ; 136: 137: : FREL= ( F: X Y -- S: FLAG ) 138: ( 139: Leave TRUE if the two floats are relatively equal based on the 140: tolerance stored in ABS-NEAR. 141: ) 142: REL-NEAR F@ FNEGATE F~ ; 143: 144: : F2DUP FOVER FOVER ; 145: : F2DROP FDROP FDROP ; 146: 147: : FNEARLY= ( F: X Y -- S: FLAG ) 148: ( 149: Leave TRUE if the two floats are nearly equal. This is a 150: refinement of Dirk Zoller's FEQ to also allow X = Y, including 151: both zero, or to allow approximately equality when X and Y are too 152: small to satisfy the relative approximation mode in the F~ 153: specification. 154: ) 155: F2DUP FEXACTLY= IF F2DROP TRUE EXIT THEN 156: F2DUP FREL= IF F2DROP TRUE EXIT THEN 157: FABS= ; 158: 159: : FCONF= ( R1 R2 -- F ) 160: EXACT? IF 161: FEXACTLY= 162: ELSE 163: FNEARLY= 164: THEN ; 165: [THEN] 166: 167: HAS-FLOATING-STACK [IF] 168: VARIABLE ACTUAL-FDEPTH 169: CREATE ACTUAL-FRESULTS 32 FLOATS ALLOT 170: VARIABLE START-FDEPTH 171: VARIABLE FCURSOR 172: 173: : EMPTY-FSTACK ( ... -- ... ) 174: FDEPTH START-FDEPTH @ < IF 175: FDEPTH START-FDEPTH @ SWAP DO 0E LOOP 176: THEN 177: FDEPTH START-FDEPTH @ > IF 178: FDEPTH START-FDEPTH @ DO FDROP LOOP 179: THEN ; 180: 181: : F{ ( -- ) 182: FDEPTH START-FDEPTH ! 0 FCURSOR ! ; 183: 184: : F-> ( ... -- ... ) 185: FDEPTH DUP ACTUAL-FDEPTH ! 186: START-FDEPTH @ > IF 187: FDEPTH START-FDEPTH @ - 0 DO ACTUAL-FRESULTS I FLOATS + F! LOOP 188: THEN ; 189: 190: : F} ( ... -- ... ) 191: FDEPTH ACTUAL-FDEPTH @ = IF 192: FDEPTH START-FDEPTH @ > IF 193: FDEPTH START-FDEPTH @ - 0 DO 194: ACTUAL-FRESULTS I FLOATS + F@ FCONF= INVERT IF 195: S" INCORRECT FP RESULT: " ERROR LEAVE 196: THEN 197: LOOP 198: THEN 199: ELSE 200: S" WRONG NUMBER OF FP RESULTS: " ERROR 201: THEN ; 202: 203: : F...}T ( -- ) 204: FCURSOR @ START-FDEPTH @ + ACTUAL-FDEPTH @ <> IF 205: S" NUMBER OF FLOAT RESULTS BEFORE '->' DOES NOT MATCH ...}T SPECIFICATION: " ERROR 206: ELSE FDEPTH START-FDEPTH @ = 0= IF 207: S" NUMBER OF FLOAT RESULTS BEFORE AND AFTER '->' DOES NOT MATCH: " ERROR 208: THEN THEN ; 209: 210: 211: : FTESTER ( R -- ) 212: FDEPTH 0= ACTUAL-FDEPTH @ FCURSOR @ START-FDEPTH @ + 1+ < OR IF 213: S" NUMBER OF FLOAT RESULTS AFTER '->' BELOW ...}T SPECIFICATION: " ERROR 214: ELSE ACTUAL-FRESULTS FCURSOR @ FLOATS + F@ FCONF= 0= IF 215: S" INCORRECT FP RESULT: " ERROR 216: THEN THEN 217: 1 FCURSOR +! ; 218: 219: [ELSE] 220: : EMPTY-FSTACK ; 221: : F{ ; 222: : F-> ; 223: : F} ; 224: : F...}T ; 225: 226: HAS-FLOATING [IF] 227: : COMPUTE-CELLS-PER-FP ( -- U ) 228: DEPTH 0E DEPTH 1- >R FDROP R> SWAP - ; 229: 230: COMPUTE-CELLS-PER-FP CONSTANT CELLS-PER-FP 231: 232: : FTESTER ( R -- ) 233: DEPTH CELLS-PER-FP < ACTUAL-DEPTH @ XCURSOR @ START-DEPTH @ + CELLS-PER-FP + < OR IF 234: S" NUMBER OF RESULTS AFTER '->' BELOW ...}T SPECIFICATION: " ERROR EXIT 235: ELSE ACTUAL-RESULTS XCURSOR @ CELLS + F@ FCONF= 0= IF 236: S" INCORRECT FP RESULT: " ERROR 237: THEN THEN 238: CELLS-PER-FP XCURSOR +! ; 239: [THEN] 240: [THEN] 241: 242: : EMPTY-STACK \ ( ... -- ) empty stack; handles underflowed stack too. 243: DEPTH START-DEPTH @ < IF 244: DEPTH START-DEPTH @ SWAP DO 0 LOOP 245: THEN 246: DEPTH START-DEPTH @ > IF 247: DEPTH START-DEPTH @ DO DROP LOOP 248: THEN 249: EMPTY-FSTACK ; 250: 251: : ERROR1 \ ( C-ADDR U -- ) display an error message 252: \ followed by the line that had the error. 253: TYPE SOURCE TYPE CR \ display line corresponding to error 254: EMPTY-STACK \ throw away everything else 255: ; 256: 257: ' ERROR1 ERROR-XT ! 258: 259: : T{ \ ( -- ) syntactic sugar. 260: DEPTH START-DEPTH ! 0 XCURSOR ! F{ ; 261: 262: : -> \ ( ... -- ) record depth and contents of stack. 263: DEPTH DUP ACTUAL-DEPTH ! \ record depth 264: START-DEPTH @ > IF \ if there is something on the stack 265: DEPTH START-DEPTH @ - 0 DO ACTUAL-RESULTS I CELLS + ! LOOP \ save them 266: THEN 267: F-> ; 268: 269: : }T \ ( ... -- ) COMPARE STACK (EXPECTED) CONTENTS WITH SAVED 270: \ (ACTUAL) CONTENTS. 271: DEPTH ACTUAL-DEPTH @ = IF \ if depths match 272: DEPTH START-DEPTH @ > IF \ if there is something on the stack 273: DEPTH START-DEPTH @ - 0 DO \ for each stack item 274: ACTUAL-RESULTS I CELLS + @ \ compare actual with expected 275: <> IF S" INCORRECT RESULT: " ERROR LEAVE THEN 276: LOOP 277: THEN 278: ELSE \ depth mismatch 279: S" WRONG NUMBER OF RESULTS: " ERROR 280: THEN 281: F} ; 282: 283: : ...}T ( -- ) 284: XCURSOR @ START-DEPTH @ + ACTUAL-DEPTH @ <> IF 285: S" NUMBER OF CELL RESULTS BEFORE '->' DOES NOT MATCH ...}T SPECIFICATION: " ERROR 286: ELSE DEPTH START-DEPTH @ = 0= IF 287: S" NUMBER OF CELL RESULTS BEFORE AND AFTER '->' DOES NOT MATCH: " ERROR 288: THEN THEN 289: F...}T ; 290: 291: : XTESTER ( X -- ) 292: DEPTH 0= ACTUAL-DEPTH @ XCURSOR @ START-DEPTH @ + 1+ < OR IF 293: S" NUMBER OF CELL RESULTS AFTER '->' BELOW ...}T SPECIFICATION: " ERROR EXIT 294: ELSE ACTUAL-RESULTS XCURSOR @ CELLS + @ <> IF 295: S" INCORRECT CELL RESULT: " ERROR 296: THEN THEN 297: 1 XCURSOR +! ; 298: 299: : X}T XTESTER ...}T ; 300: : XX}T XTESTER XTESTER ...}T ; 301: : XXX}T XTESTER XTESTER XTESTER ...}T ; 302: : XXXX}T XTESTER XTESTER XTESTER XTESTER ...}T ; 303: 304: HAS-FLOATING [IF] 305: : R}T FTESTER ...}T ; 306: : XR}T FTESTER XTESTER ...}T ; 307: : RX}T XTESTER FTESTER ...}T ; 308: : RR}T FTESTER FTESTER ...}T ; 309: : XXR}T FTESTER XTESTER XTESTER ...}T ; 310: : XRX}T XTESTER FTESTER XTESTER ...}T ; 311: : XRR}T FTESTER FTESTER XTESTER ...}T ; 312: : RXX}T XTESTER XTESTER FTESTER ...}T ; 313: : RXR}T FTESTER XTESTER FTESTER ...}T ; 314: : RRX}T XTESTER FTESTER FTESTER ...}T ; 315: : RRR}T FTESTER FTESTER FTESTER ...}T ; 316: : XXXR}T FTESTER XTESTER XTESTER XTESTER ...}T ; 317: : XXRX}T XTESTER FTESTER XTESTER XTESTER ...}T ; 318: : XXRR}T FTESTER FTESTER XTESTER XTESTER ...}T ; 319: : XRXX}T XTESTER XTESTER FTESTER XTESTER ...}T ; 320: : XRXR}T FTESTER XTESTER FTESTER XTESTER ...}T ; 321: : XRRX}T XTESTER FTESTER FTESTER XTESTER ...}T ; 322: : XRRR}T FTESTER FTESTER FTESTER XTESTER ...}T ; 323: : RXXX}T XTESTER XTESTER XTESTER FTESTER ...}T ; 324: : RXXR}T FTESTER XTESTER XTESTER FTESTER ...}T ; 325: : RXRX}T XTESTER FTESTER XTESTER FTESTER ...}T ; 326: : RXRR}T FTESTER FTESTER XTESTER FTESTER ...}T ; 327: : RRXX}T XTESTER XTESTER FTESTER FTESTER ...}T ; 328: : RRXR}T FTESTER XTESTER FTESTER FTESTER ...}T ; 329: : RRRX}T XTESTER FTESTER FTESTER FTESTER ...}T ; 330: : RRRR}T FTESTER FTESTER FTESTER FTESTER ...}T ; 331: [THEN] 332: 333: \ Set the following flag to TRUE for more verbose output; this may 334: \ allow you to tell which test caused your system to hang. 335: VARIABLE VERBOSE 336: FALSE VERBOSE ! 337: 338: : TESTING \ ( -- ) TALKING COMMENT. 339: SOURCE VERBOSE @ 340: IF DUP >R TYPE CR R> >IN ! 341: ELSE >IN ! DROP 342: THEN ; 343: 344: BASE ! 345: \ end of ttester.fs

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