IAR Information Center for RISC-V

Release notes

for IAR Embedded Workbench for RISC-V version 1.40.1

Read about the latest features, new device support, and program corrections in the release notes.

• Highlights
• Important information
• Release notes for individual components
• Product packages
• Installation and license activation

Highlights

Version 1.40.1

Compiler and library optimizations

• Several new compiler optimizations for speed and size have been introduced
• New optimized libraries for string handling, several string.h functions have been rewritten in assembler language and are available in versions optimized for both size and speed

P extension DSP and Packed SIMD

• Support for the vectorized instructions from the draft DSP and Packed SIMD specification, including intrinsic functions to support Andes DSP libraries

Trace

• Enhanced support for the SiFive Insight debug solution, adding ITC (Instrumentation Trace Component) as a transport mechanism for stdout/stderr
• Support for Trace triggers, making it possible to tailor when to start and stop trace capture

New devices

Support for these IP from Nuclei System Technology has been added:

• N200
• N300
• N600

Important information

• Upgrade information
• Before you install
  

  To avoid any problems, do not install this release in a directory where you have previously installed any older version of IAR Embedded Workbench. It is recommended that you either uninstall an earlier product, or install this release in a separate directory. As before, however, it is possible to install different products, all using the same version of the main application, in the same root directory.

• License renewal
  

  The upgrade to this version requires a license renewal. This can be performed by starting the IAR License Manager and selecting License→Check for License Renewal, or by using the Light License Manager with the command LightLicenseManager renew YOUR_PROD.EW.

• Microsoft SCC interface no longer supported
  

  Microsoft SCC-compatible version control systems are no longer supported by IAR Embedded Workbench.

• Microsoft Windows
  

  Windows Vista and newer operating systems have a security mechanism called UAC (User Access Control). Disabling UAC will automatically grant you permission when a task requires administrative rights but this is not recommended because it will reduce the security of the computer. It is not necessary to run the IAR Embedded Workbench IDE as an administrator. However, if you are not, modifications to the installed product tree in C:\Program Files\IAR Systems might not work as intended and could give unexpected results. One example is opening and building projects directly from the installed product tree. The build will succeed, but the resulting files (object, list, ...) will not appear where expected. Instead all output files will be redirected by the OS to C:\Users\<user name>\AppData\Local\VirtualStore\Program Files\IAR Systems. To avoid this, the preferred way is to copy the examples to a location outside Program Files, either manually or automatically by opening them via the IAR Information Center.

 

• Known limitations
  •  C++ RTTI and exceptions are not supported by the compiler

  • The exception and interrupt catch functionality that can be enabled under Project>Options>I-jet>Breakpoints>Catch exceptions requires that the selected device has implemented triggers for instruction counter, interrupt catch, and exception catch. Consult the device vendor manual for details

  • Flash breakpoints are not supported in this release

  • #pragma vector and automatic population of an interrupt vector are not supported for all devices, and interrupt vectors must then be set up manually

  • Some of the flash loaders included in this release are macro-based and are to be considered temporary. Until a flash loader executing in RAM is implemented, the performance with respect to download speed will be limited

  • IAR Embedded Workbench for RISC-V is not ABI-compliant with the RISC-V specification, and linking with libraries compiled with gcc is not supported in this release

  • Support for SiFive’s evaluation bitstreams is no longer available for the Arty 35T development boards. The support for this hardware in IAR Embedded Workbench for RISC-V has been removed in this release

 

• Network licenses

For network licenses, IAR Embedded Workbench for RISC-V version 1.30 and later requires IAR License Server Tools version 2.17.2 or later. For more information, see technical note TN21842. The latest IAR License Server Tools are backwards compatible with previous IAR Embedded Workbench versions.

 

Trademarks

IAR Systems, IAR Embedded Workbench, Embedded Trust, C-Trust, IAR Connect, C-SPY, C-RUN, C-STAT, IAR Visual State, IAR KickStart Kit, I-jet, I-jet Trace, I-scope, IAR Academy, IAR, and the logotype of IAR Systems are trademarks or registered trademarks owned by IAR Systems AB.

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