Add FINLOG

STATUS.md

@@ -240,7 +240,7 @@ Floating point mathematical routines - not official, but well known and broadly
 | `$BC9B`   | `QINT`                 | NOT DONE | convert FAC1 to 32 bit signed integer              |
 | `$BCCC`   | `int_FAC1`             | DONE     |                                                    |
 | `$BCF3`   | `FIN`                  | PARTIAL  | Only for 38k memory model + not fully tested yet   |
-| `$BD7E`   | `FINLOG`               | NOT DONE |                                                    |
+| `$BD7E`   | `FINLOG`               | DONE     |                                                    |
 | `$BDDD`   | `FOUT`                 | NOT DONE | outputs FAC1 to string at $0100                    |
 | `$BF71`   | `sqr_FAC1`             | PARTIAL  | needs `sqr_FAC2`                                   |
 | `$BF74`   | `sqr_FAC2`             | NOT DONE |                                                    |

src/basic/math/FIN.s

@@ -50,11 +50,8 @@ FIN_loop:
     sbc #48             ; Convert to number
     sta FIN_DIGIT
     jsr mul10_FAC1
-    jsr mov_FAC1_FAC2
     lda FIN_DIGIT
-    jsr convert_A_to_FAC1
+    jsr FINLOG
-    jsr add_FAC2_FAC1
-
     lda FIN_DECFOUND    ; Have we passed the decimal sign?
     bpl FIN_next
     inc FIN_NUMDEC

src/basic/math/bd7e.FINLOG.s

@@ -4,15 +4,16 @@
 ;; #LAYOUT# *   *       #IGNORE
 
 ;
-; Math package - add an ASCII digit that has been converted to a signed integer to FAC1
+; Math package - add an ASCII digit in A that has been converted to a signed integer to FAC1
 ;
 ; See also:
 ; - [CM64] Computes Mapping the Commodore 64 - page 113
 ;
 
-; XXX implement, test
-
-
 FINLOG:
-
+    pha
-	+STUB_IMPLEMENTATION
+    jsr mov_FAC1_FAC2
+    pla
+    jsr convert_A_to_FAC1
+    jsr add_FAC2_FAC1
+    rts

strings/68203CBC

@@ -0,0 +1,3 @@
+PLA + JSR $BC3C
+
+Pull accumulator + call well known floating point function

testsuite/unit/math.vs

@@ -500,5 +500,35 @@ print "COMPARE"
 compare $61 $61 $1001
 print "END"
 
+print "TEST: FINLOG 1.0 + 1"
+fill $61 $66 81 80 00 00 00 00
+r A=1
+r PC=$BD7E
+ret
+fill $1001 $1006 82 80 00 00 00 00
+print "COMPARE"
+compare $61 $66 $1001
+print "END"
+
+print "TEST: FINLOG 1.0 + 0"
+fill $61 $66 81 80 00 00 00 00
+r A=0
+r PC=$BD7E
+ret
+fill $1001 $1006 81 80 00 00 00 00
+print "COMPARE"
+compare $61 $66 $1001
+print "END"
+
+print "TEST: FINLOG 2.0 + 9"
+fill $61 $66 82 80 00 00 00 00
+r A=9
+r PC=$BD7E
+ret
+fill $1001 $1006 84 B0 00 00 00 00
+print "COMPARE"
+compare $61 $66 $1001
+print "END"
+
 
 q