Intel 8088 opcodes performance

	A	B	C	D	E	F	G	H	I	J	K	L
1	Test Order	Opcode (times 1000)	IBM 5150	Tandy 1000	Tandy 1000hx 4.77	Tandy 1000hx 7.16	PCjr A <128kb	PCjr A >128kb	PCjr B <128kb	PCjr B >128kb	Bytes	Cycles

2	1	nop	904	972	1117	1117	2234	859	2234	893	1	3
3	2	aaa	1884	1882	1884	1254	2236	1885	2236	1883	1	8
4	3	aad	12779	12779	12780	8519	12778	12780	12778	12779	2	60
5	4	aam	16133	16132	16133	10755	16132	16132	16132	16134	2	83
6	5	mov al,al	1809	1947	2235	2234	4469	1721	4469	1787	2	2
7	6	mov dx,0	2714	2919	3352	3352	6703	2580	6703	2681	3	4
8	7	mov dl,0	1809	1947	2235	2235	4469	1721	4470	1787	2	4
9	8	sub al,al	1809	1947	2235	2235	4470	1721	4470	1787	2	3
10	9	sub al,0	1809	1947	2235	2235	4470	1721	4470	1787	3	4
11	10	sub ax,0	2714	2919	3352	3352	6705	2580	6705	2681	4	4
12	11	xchg cx,dx	1809	1947	2235	2235	4470	1721	4470	1787	2	4
13	12	xchg ax,dx	904	972	1117	1117	2236	859	2236	893	1	3
14	13	inc al	1809	1947	2235	2235	4470	1721	4470	1787	2	3
15	14	inc ax	904	972	1117	1117	2236	859	2236	893	1	3
16	15	cwd	1045	1045	1117	1117	2234	1045	2234	1045	1	5
17	16	in al,0x60	3350	3571	3911	3352	5586	3352	5586	3354	2	10/14
18	17	in al,dx (dx=garbage)	2011	2153	2235	1677	3351	2106	3351	2235	1	8/12
19	18	push dx	3140	3209	3910	3352	6705	2979	6705	3093	1	11/15
20	19	pop dx	2715	2945	3353	3352	6705	2579	6705	2681	1	8
21	20	mov ax,[0000]	4525	4840	5587	5587	11174	4300	11174	4468	3	8+EA
22	21	mov al,[0000]	3619	3851	4469	4469	8940	3436	8940	3575	3	8+EA
23	22	out dx,al (dx=0)	2031	2153	2235	1677	3353	2104	3351	2234	1	8/12
24	23	mul al	14665	14665	14665	9777	14665	14666	14665	14665	2	70/77
25	24	mul ax	24724	24723	24724	16482	24724	24724	24724	24723	2	113/118
26	25	div bl	17388	17388	17389	11592	17389	17388	17389	17389	2	80/90
27	26	div bx	30799	30797	30799	20532	30799	30799	30799	30800	2	144/162
28	27	xlat	2740	2583	2793	2235	4469	2552	4470	2679	1	11
29	28	rep movsb (cx=1000)	3773	3370	4193	3354	5592	3579	5592	3658	1 + 1	2 + 18
30	29	rep movsw (cx=1000)	5486	5658	6705	5589	10063	5366	10063	5364	1 + 1	2 + 18
31	30	shl al,1	1809	1945	2235	2234	4470	1717	4470	1786	2	2
32	31	shl al,cl (cl=4)	5027	5025	5027	3350	5027	5028	5027	5026	2	8+4n
33	32	loop (cx=1000)	3770	3768	5026	3909	7817	3829	7819	3907	2
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36	Results are in microsenconds. The smaller, the better
37	All machines using Intel 8088 at 4.77Mhz except the Tandy 1000hx running an Intel 8088 running at 7.16Mhz
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39	Test source code:		perf.asm
40	Test binary:		perf.exe
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42	Opcodes sizes + cycles:		http://zsmith.co/intel.html
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