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core, fix 68k cycles in cyclone,fame (exceptions,bit ops,ADDI.L,TAS,CHK,MUL*,DIV*)

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also syncs these changes between fame and cyclone

in accordance with the test_inst_speed, available here:
https://gendev.spritesmind.net/forum/viewtopic.php?t=3321
DIV* is only closely approximated, it can be slightly on the high side.
This commit is contained in:
kub 2024-03-07 20:42:24 +01:00
parent 02d578601b
commit 3f5918225a
4 changed files with 522 additions and 312 deletions
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13
cpu/fame/famec.c
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@ -183,6 +183,11 @@
// internals core macros
/////////////////////////
// helper macros
#define BITCOUNT(r,v) \
(r = (v) - (((v)>>1)&0x55555555), r = (r&0x33333333) + ((r>>2)&0x33333333), \
r = (((r + (r>>4))&0x0f0f0f0f) * 0x01010101)>>24)
#define XB MEM_LE4(0)
#define XW MEM_LE2(0)
@ -525,13 +530,13 @@ static const s32 exception_cycle_table[256] =
50, // 2: Bus Error
50, // 3: Address Error
34, // 4: Illegal Instruction
38, // 5: Divide by Zero
40, // 6: CHK
34, // 5: Divide by Zero
34, // 6: CHK
34, // 7: TRAPV
34, // 8: Privilege Violation
34, // 9: Trace
4, // 10:
4, // 11:
34, // 10: Line A
34, // 11: Line F
4, // 12: RESERVED
4, // 13: Coprocessor Protocol Violation
4, // 14: Format Error