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Benchmarks
C51 Benchmarks
C251 Benchmarks
XC16x/C16x/ST10 Benchmarks
C166 Version 5 Operation Timings
80C16x Devices — Small Model
The following benchmarks provide a baseline for the execution speed of code generated by the Keil C166 Compiler. Automated test scripts were used to calculate the minimum, average, and maximum time required for each operation.
Each benchmark lists the number of states and the number of seconds required to perform the operation. The state time represents the actual number of instruction cycles. You may specify the oscillator frequency and the clock divisor (for the instruction clock) to obtain execution times in seconds.
Unsigned Character Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| unsigned char + | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| unsigned char - | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| unsigned char * | 62 3.10 µSecs | 62 3.10 µSecs | 62 3.10 µSecs |
| unsigned char / | 80 4.00 µSecs | 80 4.00 µSecs | 80 4.00 µSecs |
| unsigned char % | 88 4.40 µSecs | 88 4.40 µSecs | 88 4.40 µSecs |
| unsigned char >> | 46 2.30 µSecs | 46 2.30 µSecs | 46 2.30 µSecs |
| unsigned char << | 42 2.10 µSecs | 42 2.10 µSecs | 42 2.10 µSecs |
Signed Character Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| signed char + | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| signed char - | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| signed char * | 62 3.10 µSecs | 62 3.10 µSecs | 62 3.10 µSecs |
| signed char / | 80 4.00 µSecs | 80 4.00 µSecs | 80 4.00 µSecs |
| signed char % | 88 4.40 µSecs | 88 4.40 µSecs | 88 4.40 µSecs |
| signed char >> | 46 2.30 µSecs | 46 2.30 µSecs | 46 2.30 µSecs |
| signed char << | 42 2.10 µSecs | 42 2.10 µSecs | 42 2.10 µSecs |
Unsigned Integer Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| unsigned int + | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| unsigned int - | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| unsigned int * | 54 2.70 µSecs | 54 2.70 µSecs | 54 2.70 µSecs |
| unsigned int / | 72 3.60 µSecs | 72 3.60 µSecs | 72 3.60 µSecs |
| unsigned int % | 80 4.00 µSecs | 80 4.00 µSecs | 80 4.00 µSecs |
| unsigned int >> | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| unsigned int << | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
Signed Integer Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| signed int + | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| signed int - | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| signed int * | 54 2.70 µSecs | 54 2.70 µSecs | 54 2.70 µSecs |
| signed int / | 72 3.60 µSecs | 72 3.60 µSecs | 72 3.60 µSecs |
| signed int % | 80 4.00 µSecs | 80 4.00 µSecs | 80 4.00 µSecs |
| signed int >> | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| signed int << | 38 1.90 µSecs | 38 1.90 µSecs | 38 1.90 µSecs |
| abs () | 54 2.70 µSecs | 54 2.70 µSecs | 54 2.70 µSecs |
Unsigned Long Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| unsigned long + | 82 4.10 µSecs | 82 4.10 µSecs | 82 4.10 µSecs |
| unsigned long - | 82 4.10 µSecs | 82 4.10 µSecs | 82 4.10 µSecs |
| unsigned long * | 158 7.90 µSecs | 158 7.90 µSecs | 158 7.90 µSecs |
| unsigned long / | 276 13.80 µSecs | 280 14.00 µSecs | 296 14.80 µSecs |
| unsigned long % | 276 13.80 µSecs | 280 14.00 µSecs | 296 14.80 µSecs |
| unsigned long >> | 74 3.70 µSecs | 100 5.00 µSecs | 110 5.50 µSecs |
| unsigned long << | 74 3.70 µSecs | 100 5.00 µSecs | 110 5.50 µSecs |
Signed Long Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| signed long + | 82 4.10 µSecs | 82 4.10 µSecs | 82 4.10 µSecs |
| signed long - | 82 4.10 µSecs | 82 4.10 µSecs | 82 4.10 µSecs |
| signed long * | 158 7.90 µSecs | 158 7.90 µSecs | 158 7.90 µSecs |
| signed long / | 328 16.40 µSecs | 362 18.10 µSecs | 402 20.10 µSecs |
| signed long % | 328 16.40 µSecs | 362 18.10 µSecs | 402 20.10 µSecs |
| signed long >> | 74 3.70 µSecs | 100 5.00 µSecs | 110 5.50 µSecs |
| signed long << | 74 3.70 µSecs | 100 5.00 µSecs | 110 5.50 µSecs |
| labs () | 96 4.80 µSecs | 100 5.00 µSecs | 104 5.20 µSecs |
Floating-Point Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| float + | 362 18.10 µSecs | 444 22.20 µSecs | 760 38.00 µSecs |
| float - | 296 14.80 µSecs | 452 22.60 µSecs | 768 38.40 µSecs |
| float * | 432 21.60 µSecs | 447 22.35 µSecs | 462 23.10 µSecs |
| float / | 554 27.70 µSecs | 568 28.40 µSecs | 584 29.20 µSecs |
| modf () | 1,104 55.20 µSecs | 1,683 84.15 µSecs | 1,810 90.50 µSecs |
| fabs () | 312 15.60 µSecs | 313 15.65 µSecs | 314 15.70 µSecs |
| ceil () | 1,618 80.90 µSecs | 2,031 101.55 µSecs | 2,146 107.30 µSecs |
| floor () | 1,618 80.90 µSecs | 2,031 101.55 µSecs | 2,142 107.10 µSecs |
| pow () | 1,090 54.50 µSecs | 4,081 204.05 µSecs | 10,314 515.70 µSecs |
| sqrt () | 92 4.60 µSecs | 309 15.45 µSecs | 548 27.40 µSecs |
| exp () | 528 26.40 µSecs | 572 28.60 µSecs | 4,898 244.90 µSecs |
| log () | 88 4.40 µSecs | 1,925 96.25 µSecs | 3,828 191.40 µSecs |
| log10 () | 292 14.60 µSecs | 2,221 111.05 µSecs | 4,230 211.50 µSecs |
| sin () | 2,348 117.40 µSecs | 3,510 175.50 µSecs | 3,922 196.10 µSecs |
| cos () | 2,160 108.00 µSecs | 3,513 175.65 µSecs | 3,916 195.80 µSecs |
| tan () | 4,258 212.90 µSecs | 4,300 215.00 µSecs | 5,194 259.70 µSecs |
| asin () | 1,026 51.30 µSecs | 5,857 292.85 µSecs | 6,922 346.10 µSecs |
| acos () | 2,860 143.00 µSecs | 6,349 317.45 µSecs | 7,340 367.00 µSecs |
| atan () | 1,958 97.90 µSecs | 4,330 216.50 µSecs | 5,158 257.90 µSecs |
| atan2 () | 2,606 130.30 µSecs | 5,082 254.10 µSecs | 6,444 322.20 µSecs |
| sinh () | 8,634 431.70 µSecs | 10,496 524.80 µSecs | 11,102 555.10 µSecs |
| cosh () | 8,626 431.30 µSecs | 10,488 524.40 µSecs | 11,094 554.70 µSecs |
| tanh () | 9,380 469.00 µSecs | 9,569 478.45 µSecs | 10,844 542.20 µSecs |
Buffer Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| memset (10) | 454 22.70 µSecs | 454 22.70 µSecs | 454 22.70 µSecs |
| memset (100) | 3,878 193.90 µSecs | 3,878 193.90 µSecs | 3,878 193.90 µSecs |
| memset (1000) | 38,078 1,903.90 µSecs | 38,078 1,903.90 µSecs | 38,078 1,903.90 µSecs |
| memcpy (10) | 366 18.30 µSecs | 366 18.30 µSecs | 366 18.30 µSecs |
| memcpy (100) | 2,710 135.50 µSecs | 2,710 135.50 µSecs | 2,710 135.50 µSecs |
| memcpy (1000) | 26,110 1,305.50 µSecs | 26,110 1,305.50 µSecs | 26,110 1,305.50 µSecs |
| memmove (10 with overlap) | 732 36.60 µSecs | 732 36.60 µSecs | 732 36.60 µSecs |
| memmove (100 with overlap) | 5,956 297.80 µSecs | 5,956 297.80 µSecs | 5,956 297.80 µSecs |
| memmove (1000 with overlap) | 58,156 2,907.80 µSecs | 58,156 2,907.80 µSecs | 58,156 2,907.80 µSecs |
Memory Allocation Operations
| Operation | Min | Avg | Max |
|---|---|---|---|
| malloc (), 100.0% successful | 258 12.90 µSecs | 1,043 52.15 µSecs | 2,758 137.90 µSecs |
| free () | 298 14.90 µSecs | 1,093 54.65 µSecs | 2,302 115.10 µSecs |
Note
- These tests were performed and measured using the µVision Debugger. Test code was compiled with the C166 Version 5.03 C Compiler using the Small Memory Model and Optimization Level 7-SPEED.
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