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26 Prevent exceptions from being taken while stalling

Jumping to an exception handler while stalling and waiting for a load/store
instruction to finish can cause undefined results from the load/store
instruction. This actually fixes the issue mentioned in revision r20.		 skordal 3352d 04h /potato/trunk/
24 Remove unused STRINGIFY macros skordal 3354d 21h /potato/trunk/
22 Fix the potato_get_badvaddr() macro skordal 3354d 22h /potato/trunk/
21 Upgrade the example design to use a 60 MHz system clock skordal 3354d 22h /potato/trunk/
20 Fix SHA256 benchmark crash by storing all registers on exception handler entry

This problem will disappear when the processor is updated to conform to the
new supervisor specification, which will allow us to use a compiler that
conforms to the new "official" ABI.		 skordal 3354d 22h /potato/trunk/
19 SHA256 benchmark: allow compiler to inline at will skordal 3354d 22h /potato/trunk/
18 instr_misalign_check: add do_jump to sensitivity list skordal 3356d 22h /potato/trunk/
17 Improve detection of unaligned instructions skordal 3361d 05h /potato/trunk/
16 Correct grammar in source code comment skordal 3361d 05h /potato/trunk/
15 SHA256 benchmark: fix Makefile syntax error skordal 3367d 22h /potato/trunk/
14 Improve detection of invalid instructions skordal 3367d 23h /potato/trunk/
13 Add SHA256 benchmark code skordal 3368d 03h /potato/trunk/
12 Update example design with correct bug-report URL and testbenches skordal 3368d 05h /potato/trunk/
11 Correct FIFO file header skordal 3368d 06h /potato/trunk/
10 Add missing FIFO module skordal 3372d 23h /potato/trunk/
9 Remove dependency on a non-existent target in the Makefile skordal 3372d 23h /potato/trunk/
8 Clarify instruction ROM naming in the example design README skordal 3380d 02h /potato/trunk/
7 Add test design for the Nexys 4 board from Digilent skordal 3380d 02h /potato/trunk/
6 Add ISA tests skordal 3380d 02h /potato/trunk/
5 Update the README, remove .md extension skordal 3382d 08h /potato/trunk/

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