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387SX Floating-Point Unit Benchmark Results
Test Setup
- Hardware:
- Motherboard: ESC WH386SX
- CPU: AMD Am386SX/SXL-33 (33 MHz)
- Cache: 64 KiB
- DRAM: 16 MiB
- Cirrus Logic CL-GD5420 512 KiB SVGA
- Software:
- MS-DOS 6.22; benchmarks:
- COMPTEST 2.59: Double-Precision Kilowhetstones; Double-Precision MFLOPS
- IEEE-753 Test Vector
- RedHat 4.2 Linux; benchmarks:
- Whetstone: Double-Precision Whetstones: MIPS
- linpack_new; array size 200 x 200: KFLOPS
- MS-DOS 6.22; benchmarks:
FPUs Tested
- Intel i387SX
- Part number: N80387SX33
- Date/Lot: L6365982 A1
- Intel i387SL
- Part number: N80387SL (16~25MHz)
- Date/Lot: C2390494 A1
- ULSI Systems MathCo
- Part number: US83S87
- Date/Lot: 9128A1C
- IIT
- Part number: XC87SLC-33
- Date/Lot: 1004FA2F3EC0C CKJ 9523
- Chips and Technologies - Super Math
- Part number: P38700SX A (33)
- Date/Lot: T9M20 G15, 9230-A HONG KONG
- Cyrix - Reveal
- Part number: 387SX
- Date/Lot: DAE335A
- Cyrix - FasMath
- Part number: CX-83S87-20-KP
- Date/Lot: A30033
Benchmark Results
| FPU | COMPTEST (Kilowhetstones) | COMPTEST (MFLOPS) | Whetstone (MIPS) | linpack_new (KFLOPS) | IEEE-753 Test Vector Failed Tests | Notes |
|---|---|---|---|---|---|---|
| Intel i387SX | 1603.2 | 0.225 | 2.7 | 339.934, 339.514, 338.468 | None | COMPTEST reports 24.45 MHz FPU frequency |
| Intel i387SL | 1601.6 | 0.225 | None | |||
| ULSI MathCo US83S87 | 1654.6 | 0.226 | 2.9 | 339.095, 340.355, 340.355 | Division, Multiplication, Scalb | |
| IIT XC87SLC-33 | 1703.9 | 0.225 | 2.8 | 325.434, 325.049, 324.820 | None | COMPTEST reports 47.16 MHz FPU frequency |
| Chips Super Math P38700SX A 33 | 1828.6 | 0.232 | 3.1 | 337.428, 338.677, 338.885 | None | |
| Cyrix Reveal 387SX | 1834.9 | 0.229 | 3.0 | 334.144, 334.959, 334.348 | None | |
| Cyrix FasMath CX-83S87-30-KP | 1880.1 | 0.232 |
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