EP93XX. ARM. ®. 9 Embedded Processor Family. EP93xx. User’s Guide 8×8 Key Mtx. ARMT. Maverick. 18 Bit Raster. LCD I/F. Crunch. Notes on making a proper EABI cross compiler for Maverick Crunch (EP, EP93xx) processors. This is a bit of “higher order hacking” and. It’s already configured to build in /opt/toolchains/ directory. This work is based on patches by Martin Guy and tested both on Cirrus demo board for the EP
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There is a long description of it at http: Finally, the first and second instruction must appear to the coprocessor with the correct relative timing; this timing is not simply proportional to the number of intervening instructions and is difficult to predict in general.
When the error occurs, the result is either coprocessor register or memory corruption. The compilers can be downloaded under http: It has a different instruction set from other floating point accelerators that are found with ARM processors: Let the first instruction be a serialized instruction that does not execute.
Disable interrupts when executing cfldr32 or cfmv64lr instructions. Software and Tools Software and Design Resources available by request. The rich set of peripherals natively implemented by the microprocessor allow the module to drive all kind of buses commonly used in the industrial and PC worlds: If the instruction preceding the interrupted instruction can be determined, and it is a cfldr32 or cfmv64lrthe instruction may be re-executed or explicitly sign extended before returning from interrupt or exception.
CIRRUS LOGIC EP9315 – ZEFEER
This article is an orphanas no other articles link to mavdrick. For an instruction to be serialized, at least one of the following must be true: The above patch incorrectly calls the iWMMXt pop functions. Hardware bugs See cirrus. Discussion specific to it usually happens on the linux-cirrus mailing list. The software workaround involves avoiding a pair wp9302 consecutive instructions with these properties. GCC does not emit conditional Maverick instructions.
Evaluation Amverick Electrical Schematics General carrier board design guidelines Zefeer specific integration guidelines. Summary of bugs CMP: Disabling the rest would only leave multiply and compare, so we live with the imprecision. It has a -mfix-cirrus-invalid-insns flag, which is supposed to ensure that the two instructions following a branch are not Cirrus one but fails to do so, and that every cfldrdcfldr64cfstrdcfstr64 is followed by one non-Cirrus instruction, which should fix bugs 1 and 2.
ArmEabiMaverickCrunch – Debian Wiki
The first instruction must be a coprocessor compare instruction, one of cfcmp32cfcmp64cfcmpsand cfcmpd. This error can occur if the following is true: Synchronous mode is much slower, but ensures that, if floating point exceptions maverifk enabled and occur, you can be sure to pinpoint the offending instruction. The default is non-forwarding.
Avoid executing these two instructions. Registers It has 16 bit registers, which can be treated as single- or double-precision floating point values, or as or bit integers. It performs these in ARM registers as usual.
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Module Height and Width. Buggy cfadd – cfaddne – cfstr Buggy cfadd – nop – cfaddne – cfstr Buggy cfadd – mqverick – nop – cfstr OK cfadd – nop – nop – cfaddne – cfstr Buggy cfadd – nop – cfaddne – nop – cfstr Maverrick cfadd – cfaddne – nop – nop – cfstr OK cfadd – nop – nop – nop – cfaddne – cfstr OK cfadd – nop – nop – cfaddne – nop – cfstr OK cfadd – nop – cfaddne – nop – nop – cfstr OK cfadd – cfaddne – nop – nop – nop – cfstr Buggy cfadd – cfaddne – cfaddne – cfstr Buggy cfadd – cfaddne – cfaddne – nop – cfstr OK cfadd – cfaddne mavericck cfaddne – nop – nop – cfstr OK cfadd – nop – cfaddne – cfaddne – cfstr OK cfadd – nop – cfaddne – cfaddne – nop – cfstr OK cfadd – nop – cfaddne – cfaddne – nop – nop – cfstr The second instruction may also not be executed because it follows a branch: Plagued with hardware bugs and poor compiler support, it was seldom used in any of the devices based on those chips and the product line was discontinued on April 1, The ARMT core operates from a 1.
Futaris and Mmaverick remove this flag. A test program tickles the bug in both ways on revision E1 silicon. It also has four bit registers rp9302 which can perform ep930 bit multiply-and-accumulate instruction and a status register, as well as conversions between integer and floating point values and instructions to move data between itself and the ARM registers or memory.
Voice, Record, Control, and Playback. In GCC output, this is further restricted to 0xe[cde] Orphaned articles from July All orphaned articles.
Under Linux on the sample board I use, forward is disabled by default. Therefore typical applications of this module are interactive terminals, kiosks, advanced instruments, info-points electronics, and in general everything that must look like a PC without being a PC and without the cost of a PC. The Cirrus crunch softfloat library has integer asm code to check for denorm values before these operations e. The second consecutive instruction: It is, if and only if both: The result underflows directly to zero.
If both instructions depend on the same condition code, the error should not maerick, as either both or neither will execute. Instruction set It provides instructions to add, subtract, multiply, compare, negate and give absolute value for all these types, to shift the registers in the two integer modes, and to convert between the data types.
This ep3902 will occur under maverickk following conditions: Designers of industrial controls, internet radios, digital media servers, audio jukeboxes, thin clients, set-top boxes, point-of-sale terminals, biometric security systems and GPS devices will benefit from the EP’s integrated architecture and advanced features.
This coprocessor greatly accelerates the ARMT’s single- and double-precision integer and floating-point processing mavrrick, enabling the EP to perform high-speed mathematical calculations when encoding digital audio and video formats, processing industrial-control algorithms el9302 performing other math-intensive computing and data-processing functions. The -mcirrus-di flag enables them, caveat emptor.