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MOTOROLA M68040 USER’S MANUAL 10-1
SECTION 10
INSTRUCTION TIMINGS
This section summarizes instruction timings for the M68040. The timings are divided into
two groups: integer unit and floating-point unit instruction timings. Each group is further
subdivided to separate more complex instruction timings. Each of these subdivided groups
is in alphabetical order with no reference to mode. Table 10-1 alphabetically lists
instruction timings and their location in this section.
Table 10.1. Instruction Timing Index
Instruction Page Instruction Page Instruction Page
ABCD 10-11 BRA 10-11 EOR 10-13
ADD 10-13 BSET 10-15 EORI 10-13
ADDA 10-13 BSR <offset> 10-11 EORI #<xxx>,CCR 10-11
ADDI 10-13 BTST 10-17 EORI #<xxx>,SR 10-11
ADDQ 10-14 CAS 10-17 EXG 10-11
ADDX 10-11 CAS2 10-11 EXT 10-11
AND 10-13 CHK <ea>, Dn 10-17 EXTB 10-11
ANDI 10-13 CHK2 <ea>, Rn 10-18 FABS 10-30,36
ANDI #<xxx>,CCR 10-11 CLR 10-18 FADD 10-30,35
ANDI #<xxx>,SR 10-11 CINV 10-8 FBcc 10-29
ASL 10-14 CMP 10-18 FCMP 10-30,37
ASR 10-14 CMP2 10-19 FDBcc 10-29
Bcc 10-11 CMPA.L 10-19 FDIV 10-30,35
BCHG 10-15 CMPI 10-19 FMOVE 10-30,36
BCLR 10-15 CMPM 10-11 FMOVE FPn,<ea> 10-31
BFCHG 10-15 CPUSH 10-8 FMOVE/FMOVEM
to/from CR
10-32
BFCLR 10-15 DBcc 10-11 FMOVEM 10-37
BFEXTS 10-15 DIVS.L 10-20 FMOVEM <ea>,<list> 10-32
BFEXTU 10-15 DIVS.W 10-20 FMOVEM <list>,<ea> 10-32
BFFFO 10-16 DIVSL.L 10-20 FMUL 10-30,35
BFINS 10-16 DIVU.L 10-20 FNEG 10-30,36
BFSET 10-15 DIVU.W 10-20 FNOP 10-29
BFTST 10-16 DIVUL.L 10-20 FRESTORE <ea> 10-34
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