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2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf 
 kernel/arch/parisc/math-emu/fpudispatch.c
....@@ -1,22 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Linux/PA-RISC Project (http://www.parisc-linux.org/)
34  *
45  * Floating-point emulation code
56  *  Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
6
- *
7
- *    This program is free software; you can redistribute it and/or modify
8
- *    it under the terms of the GNU General Public License as published by
9
- *    the Free Software Foundation; either version 2, or (at your option)
10
- *    any later version.
11
- *
12
- *    This program is distributed in the hope that it will be useful,
13
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
14
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
- *    GNU General Public License for more details.
16
- *
17
- *    You should have received a copy of the GNU General Public License
18
- *    along with this program; if not, write to the Free Software
19
- *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
207  */
218 /*
229  * BEGIN_DESC
....@@ -323,12 +310,15 @@
323310 					r1 &= ~3;
324311 					fpregs[t+3] = fpregs[r1+3];
325312 					fpregs[t+2] = fpregs[r1+2];
313
+					fallthrough;
326314 				    case 1: /* double */
327315 					fpregs[t+1] = fpregs[r1+1];
316
+					fallthrough;
328317 				    case 0: /* single */
329318 					fpregs[t] = fpregs[r1];
330319 					return(NOEXCEPTION);
331320 				}
321
+				BUG();
332322 			case 3: /* FABS */
333323 				switch (fmt) {
334324 				    case 2: /* illegal */
....@@ -338,13 +328,16 @@
338328 					r1 &= ~3;
339329 					fpregs[t+3] = fpregs[r1+3];
340330 					fpregs[t+2] = fpregs[r1+2];
331
+					fallthrough;
341332 				    case 1: /* double */
342333 					fpregs[t+1] = fpregs[r1+1];
334
+					fallthrough;
343335 				    case 0: /* single */
344336 					/* copy and clear sign bit */
345337 					fpregs[t] = fpregs[r1] & 0x7fffffff;
346338 					return(NOEXCEPTION);
347339 				}
340
+				BUG();
348341 			case 6: /* FNEG */
349342 				switch (fmt) {
350343 				    case 2: /* illegal */
....@@ -354,13 +347,16 @@
354347 					r1 &= ~3;
355348 					fpregs[t+3] = fpregs[r1+3];
356349 					fpregs[t+2] = fpregs[r1+2];
350
+					fallthrough;
357351 				    case 1: /* double */
358352 					fpregs[t+1] = fpregs[r1+1];
353
+					fallthrough;
359354 				    case 0: /* single */
360355 					/* copy and invert sign bit */
361356 					fpregs[t] = fpregs[r1] ^ 0x80000000;
362357 					return(NOEXCEPTION);
363358 				}
359
+				BUG();
364360 			case 7: /* FNEGABS */
365361 				switch (fmt) {
366362 				    case 2: /* illegal */
....@@ -370,13 +366,16 @@
370366 					r1 &= ~3;
371367 					fpregs[t+3] = fpregs[r1+3];
372368 					fpregs[t+2] = fpregs[r1+2];
369
+					fallthrough;
373370 				    case 1: /* double */
374371 					fpregs[t+1] = fpregs[r1+1];
372
+					fallthrough;
375373 				    case 0: /* single */
376374 					/* copy and set sign bit */
377375 					fpregs[t] = fpregs[r1] | 0x80000000;
378376 					return(NOEXCEPTION);
379377 				}
378
+				BUG();
380379 			case 4: /* FSQRT */
381380 				switch (fmt) {
382381 				    case 0:
....@@ -389,6 +388,7 @@
389388 				    case 3: /* quad not implemented */
390389 					return(MAJOR_0C_EXCP);
391390 				}
391
+				BUG();
392392 			case 5: /* FRND */
393393 				switch (fmt) {
394394 				    case 0:
....@@ -402,7 +402,7 @@
402402 					return(MAJOR_0C_EXCP);
403403 				}
404404 		} /* end of switch (subop) */
405
-
405
+		BUG();
406406 	case 1: /* class 1 */
407407 		df = extru(ir,fpdfpos,2); /* get dest format */
408408 		if ((df & 2) || (fmt & 2)) {
....@@ -432,6 +432,7 @@
432432 				    case 3: /* dbl/dbl */
433433 					return(MAJOR_0C_EXCP);
434434 				}
435
+				BUG();
435436 			case 1: /* FCNVXF */
436437 				switch(fmt) {
437438 				    case 0: /* sgl/sgl */
....@@ -447,6 +448,7 @@
447448 					return(dbl_to_dbl_fcnvxf(&fpregs[r1],0,
448449 						&fpregs[t],status));
449450 				}
451
+				BUG();
450452 			case 2: /* FCNVFX */
451453 				switch(fmt) {
452454 				    case 0: /* sgl/sgl */
....@@ -462,6 +464,7 @@
462464 					return(dbl_to_dbl_fcnvfx(&fpregs[r1],0,
463465 						&fpregs[t],status));
464466 				}
467
+				BUG();
465468 			case 3: /* FCNVFXT */
466469 				switch(fmt) {
467470 				    case 0: /* sgl/sgl */
....@@ -477,6 +480,7 @@
477480 					return(dbl_to_dbl_fcnvfxt(&fpregs[r1],0,
478481 						&fpregs[t],status));
479482 				}
483
+				BUG();
480484 			case 5: /* FCNVUF (PA2.0 only) */
481485 				switch(fmt) {
482486 				    case 0: /* sgl/sgl */
....@@ -492,6 +496,7 @@
492496 					return(dbl_to_dbl_fcnvuf(&fpregs[r1],0,
493497 						&fpregs[t],status));
494498 				}
499
+				BUG();
495500 			case 6: /* FCNVFU (PA2.0 only) */
496501 				switch(fmt) {
497502 				    case 0: /* sgl/sgl */
....@@ -507,6 +512,7 @@
507512 					return(dbl_to_dbl_fcnvfu(&fpregs[r1],0,
508513 						&fpregs[t],status));
509514 				}
515
+				BUG();
510516 			case 7: /* FCNVFUT (PA2.0 only) */
511517 				switch(fmt) {
512518 				    case 0: /* sgl/sgl */
....@@ -522,10 +528,11 @@
522528 					return(dbl_to_dbl_fcnvfut(&fpregs[r1],0,
523529 						&fpregs[t],status));
524530 				}
531
+				BUG();
525532 			case 4: /* undefined */
526533 				return(MAJOR_0C_EXCP);
527534 		} /* end of switch subop */
528
-
535
+		BUG();
529536 	case 2: /* class 2 */
530537 		fpu_type_flags=fpregs[FPU_TYPE_FLAG_POS];
531538 		r2 = extru(ir, fpr2pos, 5) * sizeof(double)/sizeof(u_int);
....@@ -603,6 +610,7 @@
603610 				    case 3: /* quad not implemented */
604611 					return(MAJOR_0C_EXCP);
605612 				}
613
+				BUG();
606614 			case 1: /* FTEST */
607615 				switch (fmt) {
608616 				    case 0:
....@@ -622,8 +630,10 @@
622630 				    case 3:
623631 					return(MAJOR_0C_EXCP);
624632 				}
633
+				BUG();
625634 		    } /* end of switch subop */
626635 		} /* end of else for PA1.0 & PA1.1 */
636
+		BUG();
627637 	case 3: /* class 3 */
628638 		r2 = extru(ir,fpr2pos,5) * sizeof(double)/sizeof(u_int);
629639 		if (r2 == 0)
....@@ -646,6 +656,7 @@
646656 				    case 3: /* quad not implemented */
647657 					return(MAJOR_0C_EXCP);
648658 				}
659
+				BUG();
649660 			case 1: /* FSUB */
650661 				switch (fmt) {
651662 				    case 0:
....@@ -658,6 +669,7 @@
658669 				    case 3: /* quad not implemented */
659670 					return(MAJOR_0C_EXCP);
660671 				}
672
+				BUG();
661673 			case 2: /* FMPY */
662674 				switch (fmt) {
663675 				    case 0:
....@@ -670,6 +682,7 @@
670682 				    case 3: /* quad not implemented */
671683 					return(MAJOR_0C_EXCP);
672684 				}
685
+				BUG();
673686 			case 3: /* FDIV */
674687 				switch (fmt) {
675688 				    case 0:
....@@ -682,6 +695,7 @@
682695 				    case 3: /* quad not implemented */
683696 					return(MAJOR_0C_EXCP);
684697 				}
698
+				BUG();
685699 			case 4: /* FREM */
686700 				switch (fmt) {
687701 				    case 0:
....@@ -694,6 +708,7 @@
694708 				    case 3: /* quad not implemented */
695709 					return(MAJOR_0C_EXCP);
696710 				}
711
+				BUG();
697712 		} /* end of class 3 switch */
698713 	} /* end of switch(class) */
699714 
....@@ -749,10 +764,12 @@
749764 					return(MAJOR_0E_EXCP);
750765 				    case 1: /* double */
751766 					fpregs[t+1] = fpregs[r1+1];
767
+					fallthrough;
752768 				    case 0: /* single */
753769 					fpregs[t] = fpregs[r1];
754770 					return(NOEXCEPTION);
755771 				}
772
+				BUG();
756773 			case 3: /* FABS */
757774 				switch (fmt) {
758775 				    case 2:
....@@ -760,10 +777,12 @@
760777 					return(MAJOR_0E_EXCP);
761778 				    case 1: /* double */
762779 					fpregs[t+1] = fpregs[r1+1];
780
+					fallthrough;
763781 				    case 0: /* single */
764782 					fpregs[t] = fpregs[r1] & 0x7fffffff;
765783 					return(NOEXCEPTION);
766784 				}
785
+				BUG();
767786 			case 6: /* FNEG */
768787 				switch (fmt) {
769788 				    case 2:
....@@ -771,10 +790,12 @@
771790 					return(MAJOR_0E_EXCP);
772791 				    case 1: /* double */
773792 					fpregs[t+1] = fpregs[r1+1];
793
+					fallthrough;
774794 				    case 0: /* single */
775795 					fpregs[t] = fpregs[r1] ^ 0x80000000;
776796 					return(NOEXCEPTION);
777797 				}
798
+				BUG();
778799 			case 7: /* FNEGABS */
779800 				switch (fmt) {
780801 				    case 2:
....@@ -782,10 +803,12 @@
782803 					return(MAJOR_0E_EXCP);
783804 				    case 1: /* double */
784805 					fpregs[t+1] = fpregs[r1+1];
806
+					fallthrough;
785807 				    case 0: /* single */
786808 					fpregs[t] = fpregs[r1] | 0x80000000;
787809 					return(NOEXCEPTION);
788810 				}
811
+				BUG();
789812 			case 4: /* FSQRT */
790813 				switch (fmt) {
791814 				    case 0:
....@@ -798,6 +821,7 @@
798821 				    case 3:
799822 					return(MAJOR_0E_EXCP);
800823 				}
824
+				BUG();
801825 			case 5: /* FRMD */
802826 				switch (fmt) {
803827 				    case 0:
....@@ -811,7 +835,7 @@
811835 					return(MAJOR_0E_EXCP);
812836 				}
813837 		} /* end of switch (subop */
814
-	
838
+		BUG();
815839 	case 1: /* class 1 */
816840 		df = extru(ir,fpdfpos,2); /* get dest format */
817841 		/*
....@@ -839,6 +863,7 @@
839863 				    case 3: /* dbl/dbl */
840864 					return(MAJOR_0E_EXCP);
841865 				}
866
+				BUG();
842867 			case 1: /* FCNVXF */
843868 				switch(fmt) {
844869 				    case 0: /* sgl/sgl */
....@@ -854,6 +879,7 @@
854879 					return(dbl_to_dbl_fcnvxf(&fpregs[r1],0,
855880 						&fpregs[t],status));
856881 				}
882
+				BUG();
857883 			case 2: /* FCNVFX */
858884 				switch(fmt) {
859885 				    case 0: /* sgl/sgl */
....@@ -869,6 +895,7 @@
869895 					return(dbl_to_dbl_fcnvfx(&fpregs[r1],0,
870896 						&fpregs[t],status));
871897 				}
898
+				BUG();
872899 			case 3: /* FCNVFXT */
873900 				switch(fmt) {
874901 				    case 0: /* sgl/sgl */
....@@ -884,6 +911,7 @@
884911 					return(dbl_to_dbl_fcnvfxt(&fpregs[r1],0,
885912 						&fpregs[t],status));
886913 				}
914
+				BUG();
887915 			case 5: /* FCNVUF (PA2.0 only) */
888916 				switch(fmt) {
889917 				    case 0: /* sgl/sgl */
....@@ -899,6 +927,7 @@
899927 					return(dbl_to_dbl_fcnvuf(&fpregs[r1],0,
900928 						&fpregs[t],status));
901929 				}
930
+				BUG();
902931 			case 6: /* FCNVFU (PA2.0 only) */
903932 				switch(fmt) {
904933 				    case 0: /* sgl/sgl */
....@@ -914,6 +943,7 @@
914943 					return(dbl_to_dbl_fcnvfu(&fpregs[r1],0,
915944 						&fpregs[t],status));
916945 				}
946
+				BUG();
917947 			case 7: /* FCNVFUT (PA2.0 only) */
918948 				switch(fmt) {
919949 				    case 0: /* sgl/sgl */
....@@ -929,9 +959,11 @@
929959 					return(dbl_to_dbl_fcnvfut(&fpregs[r1],0,
930960 						&fpregs[t],status));
931961 				}
962
+				BUG();
932963 			case 4: /* undefined */
933964 				return(MAJOR_0C_EXCP);
934965 		} /* end of switch subop */
966
+		BUG();
935967 	case 2: /* class 2 */
936968 		/*
937969 		 * Be careful out there.
....@@ -1007,6 +1039,7 @@
10071039 				}
10081040 		    } /* end of switch subop */
10091041 		} /* end of else for PA1.0 & PA1.1 */
1042
+		BUG();
10101043 	case 3: /* class 3 */
10111044 		/*
10121045 		 * Be careful out there.
....@@ -1039,6 +1072,7 @@
10391072 					return(dbl_fadd(&fpregs[r1],&fpregs[r2],
10401073 						&fpregs[t],status));
10411074 				}
1075
+				BUG();
10421076 			case 1: /* FSUB */
10431077 				switch (fmt) {
10441078 				    case 0:
....@@ -1048,6 +1082,7 @@
10481082 					return(dbl_fsub(&fpregs[r1],&fpregs[r2],
10491083 						&fpregs[t],status));
10501084 				}
1085
+				BUG();
10511086 			case 2: /* FMPY or XMPYU */
10521087 				/*
10531088 				 * check for integer multiply (x bit set)
....@@ -1084,6 +1119,7 @@
10841119 					       &fpregs[r2],&fpregs[t],status));
10851120 				    }
10861121 				}
1122
+				BUG();
10871123 			case 3: /* FDIV */
10881124 				switch (fmt) {
10891125 				    case 0:
....@@ -1093,6 +1129,7 @@
10931129 					return(dbl_fdiv(&fpregs[r1],&fpregs[r2],
10941130 						&fpregs[t],status));
10951131 				}
1132
+				BUG();
10961133 			case 4: /* FREM */
10971134 				switch (fmt) {
10981135 				    case 0: