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The ARM10200 Reference Device is a packaged chip containing an ARM1020T core with the VFP10 ™ coprocessor, a high performance SDRAM memory interface and an on-chip Phase Locked Loop (PLL). The ARM10200 can be used for all types of evaluation, especially benchmarking and system prototyping. System-on-a-chip Ready
The ARM10200 Reference Device is a packaged chip containing an ARM1020T core with the VFP10TM coprocessor, a high performance SDRAM memory interface and an on-chip Phase Locked Loop (PLL). The ARM10200 can be used for all types of evaluation, especially benchmarking and system prototyping.
Aug 20, 2015 · VFPv3 is implemented on ARM architecture v7 and later (e.g. Cortex-A8). So, VFPv1 is implemented in ARM10200, which is ARMv5T ( ARM10200 Datasheet, ARM10200™ Reference Device Product Overview ). And only the next VFP10 revision (VPFv2) is available in ARMv5TE processors.
- Release information
- Proprietary notice
- Confidentiality status
- Feedback on this Application Note
- 1.4 Patches
- 2.1.2 --fpmode model
- --fpmode fast
- 2.2 Using the assembler
- 2.2.1 --fpu name
- 2.2.2 --fpmode model
- 2.3 Floating point linkage and the --fpu option
- 2.3.1 Floating point linkage
- 2.3.3 ARM and Thumb floating-point (ARMv6 and earlier)
- 3.2 Install the VFP support code
- 3.5 Installation routine
- 5.1 Configuring RVISS (ARMulator) for VFP in RVD
- Target Æ Connect to Target
- RVDS 3.0: Target Æ Connect to Target
- RVDS 3.1 and onward: Target Æ Connect to Target
- 5.1.3 Vector Catch
- Target Æ Connect to target
- 5.3 Enabling VFP registers in RVD
- 5.5.1 $target_fpu
- Change $target_fpu to 3
- Browse to your script file
- 5.5.2 vector_catch
- 5.6 Enabling VFP registers in AXD
- Options Æ Configure Target
- 7 VFP Support Code
- vfpsubarch.s
- vfpsupport.l
- Privileged mode processing
- 7.2 Overview of processing a bounced VFP instruction
- 7.2.1 Top-level Undefined Instruction handler
- 7.2.3 Returning to the top-level handler
- 7.3.1 Top-level Undefined Instruction handler
- Calling a second-level handler
- 7.3.2 Second-level VFP Undefined Instruction handler
- Overview
- Checking for illegal instructions
- Collecting exception information
- 7.3.3 Returning to the top-level handler
- Returning directly to the application
- Returning via a user-level exception handler
- ControlBuffer *GetControlBuffer( ARM_RegDump *regdump, ReturnAddress target, unsigned size)
- User-level exception handler prototype
- 7.3.4 User-level VFP handler
- Saving state
- Returning to the application
- 7.5.1 _VFP_Computation_Engine function
- Subarchitecture note
- 7.5.3 Returns from _VFP_Computation_Engine
- 7.6.1 Support for handling bounces
The following changes have been made to this Application Note:
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It is advisable to update your tools to the latest versions as these updates will contain fixes to known problems. These updates are available from the downloads section of the Technical Support area on the ARM website.
Specifies the floating-point conformance, and sets library attributes and floating-point optimizations. Different libraries may be selected depending on the model chosen. Note --fpmode std --fpmode ieee_full --fpmode ieee_fixed --fpmode ieee_no_fenv
IEEE finite values with denormals flushed to zero, round-to-nearest and no exceptions. It is C and C++ compatible. This is the default option. All facilities, operations and representations guaranteed by the IEEE standard are available in single and double precision. Modes of operation can also be selected dynamically at run-time. IEEE standard wit...
By default, the assembler faults the use of VFP instructions. To enable the assembly of VFP instructions, appropriate options need to be used. These options enable the use of VFP instructions in ARM or Thumb-2 code and modify the build attributes to enable the linker to determine the compatibility between object files, and to select appropriate lib...
This option determines the target FPU architecture. name options are the same as for the compiler.
This option selects the target floating-point model. Different libraries may be selected depending on the model chosen. model options are the same as for the compiler.
The following guidelines can be used to help you select the most suitable floating-point build options to use for your application.
How floating point arguments are passed into (and returned from) functions is called the "floating point linkage". There are two different types of floating point linkage available in RVDS : “hardware” and “software” floating point linkage. With hardware floating point linkage, floating point arguments and return values are passed in VFP coproces...
The Thumb instruction set in ARMv6 and earlier does not support coprocessor instructions and this means you cannot access the VFP coprocessor register in code compiled for Thumb. Therefore you must either compile for the ARM instruction set or use software floating point linkage. Compiling with --fpu vfpv2 will use hardware VFP linkage and therefor...
Trying to execute VFP instructions not implemented by the VFP hardware or executing “exceptional cases” causes the ARM to take an undefined instruction exception. This is sometimes known as bouncing the instruction. The VFP support code must therefore be installed on to the undefined instruction vector before floating-point operations take place. I...
One important point to note about the preceding steps is that they must all be carried out before the C library’s floating-point initialization takes place. This is done by the library routine _fp_init(). The easiest way to do this is to write a simple function that calls the required routines described in sections 3.1-3.5 before _fp_init() is exe...
The RVISS (ARMulator) provides models of the VFP architecture that can run VFP instructions. However as these model the architecture rather than specific implementations, they cannot be used to accurately benchmark the floating-point performance that will be obtained in a real system. In RVD an ARMulator connection can be established in two diffe...
This opens the Connection Control window, you must start a new ARMulator Simulator by clicking on the crosses navigate to: + Server + localhost. To configure the new device right click on the new_ARM option and select “Configure Device Info”. Select the required Processor and VFP type and click “OK”. Then, in the Connection Control Window, place...
Click on localhost in the Connection Control Window, then click "Open Target Access". Right click on new_arm which should now have appeared in the expanded tree and select Configure. In the Configuration Window select the required Processor and VFP type and click OK. Re-open the Connection Control Window, select “new_arm” and click Connect to star...
Expand RealView Instruction Set Simulator (RVISS) in the Connection Control Window, then right click on one of the RVISS connections and select Configure. In the Configuration Window select the required Processor and VFP type and click OK. Go back to the Connection Control Window, select the RVISS connection you configured and click Connect to star...
The VFP Support Code is installed on to the undefined instruction vector table entry, so unless you are using RunFast mode, it is also necessary to ensure that the debugger is not trapping undefined instructions using its “vector_catch” function. To do this navigate to:
to open the Connection Control window and start a new ISSM configuration by clicking on the "Add" button. This will open the Model Configuration Utility window. Note Select which core you want to connect to from the "Models" menu on the left side of the configuration utility and click "OK". In the Connection Control window, double click on the ISS...
Normally RVD will automatically display the registers present in the target to which you have connected. However, if connecting to a target processor using RealView ICE or Multi-ICE, For certain targets RVD may occasionally fail to display the VFP registers. If connecting with RealView ICE, RVD can be manually told that the target processor has a V...
This debugger internal variable controls the way that floating-point numbers are displayed by the debugger. When using a VFP coprocessor (either within ARMulator or in real hardware), it is important to set this to the correct value before loading your image to ensure the correct display of float and double values in memory. If this is not done, th...
This can also be done through the AXD command line interface using: let $target_fpu,3 You might want to put this command into a script file, which can then be run automatically by AXD on starting up, using the Options -> Configure Interface (Session File tab) dialog: Note Tick the “Run Configuration Script
An example script file, vfp_script.txt, is in the \\utils subdirectory of the associated code suite. You will need to select $target_fpu each time you start AXD unless you automatically run a script file on start up.
As the VFP Support Code is installed on to the undefined instruction vector table entry, it is also necessary to ensure that the debugger is not trapping undefined instructions using its “vector_catch” function. To ensure that this is disabled, either use the “Options-> Configure Processor” menu, or use the following AXD CLI command: spp vector_cat...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
These functions support VFP Undef exception handling. They must be called from a privileged processor mode. bool _VFP_Is_Compute_Exception(uint32 instr) This function must be called after the VFP has bounced an instruction, with the encoding of the instruction bounced as an argument. If the bounce was caused by an illegal instruction, this functio...
Documentation – Arm Developer
The ARM10 Family of Advanced. Microprocessor Cores. Stephen Hill. ARM Austin Design Center. THE ARCHITECTURE FOR THE DIGITAL WORLD. TM. Hot Chips 13 1. f Agenda. u0011. u0014 Design overview. u0011. u0015 Microarchitecture. • ARM10. o Memory System. o Interrupt response. 3. Power. o Dynamic power. o Power down modes. 4. VFP10. u0011. u0018 ETM10.
abstract: arm10200 arm10 arm1020e arm1020t arm7500fe armv5tej cm10200e arm10200e ddi 0100e Text: ARM10200E ) and in the VFP9-S. In addition particular implementations may provide implementation-specific