Optimization of Embedded Linux systems without FPU Sergey Panasyuk, SUNYIT Scott Spetka, SUNYIT and ITT Corp Utica, NY 13504-3050 High Performance Embedded.

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Optimization of Embedded Linux systems without FPU Sergey Panasyuk, SUNYIT Scott Spetka, SUNYIT and ITT Corp Utica, NY High Performance Embedded Computing (HPEC) Workshop 23−25 September 2008 Approved for public release; distribution is unlimited.

MIT Lincoln Laboratory XYZ 3/11/2005 Embedded Software Low cost –GNU Tools and Linux OS –Multi-architecture support With or without GUI High performance expectations Long battery life expectations May run with or without FPA/FPU –ARM vs. XScale Optimization of Embedded Linux systems without FPU Approved for public release; distribution is unlimited

MIT Lincoln Laboratory XYZ 3/11/2005 Software FPE vs. FPU FPU/FPA –NetWinder Floating Point Emulator (NWFPE) –Fast Floating Point Emulator (FastFPE) Software FPE Call: Add two floatsFPU/FPAFPE Disassemblyldfsf0, [r3, #0] ldfsf1, [r1, #0] adfsf0, f0, f1 stfsf0, [r2, #0] ldrr0, [sl, r4, asl #2] ldrr1, [r8, r4, asl #2] bl__addsf3 strr0, [r5, r4, asl #2] Optimization of Embedded Linux systems without FPU Approved for public release; distribution is unlimited

MIT Lincoln Laboratory XYZ 3/11/2005 Optimization of Embedded Linux systems without FPU Performance Chart Approved for public release; distribution is unlimited