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floating-pointarmarmv7windows-embedded-compactplatform-builder
Doug
Doug

Reputation: 3003

Floating point ARM support in WEC7

In VS2008 Platform Builder, the selection options for "Target architecture for compiler" of "ARMv7 with VFPv3-D32" will use these build options: /QRarch7 /QRfpe- /arch:VFPv3-D32

uSoft say's: For platforms without VFP hardware, use the flag ENABLE_HARDWARE_FLOAT=0 or /QRfpe- so the compiler will generate code that handles floating-point operations using integer arithmetic.

So when you tell the compiler that the VFP HW is present, you add a build option to use integer math rather than use the VFP hardware.

This doesn't make sense. Can someone explain this?

EDIT: Its worth noting that the VFP is optional on some ARMv7 chips but there is no ARMv7 nonVFP option in PlatformBuilder.

Another uSoft post that says /QRfpe- enables the VFP HW support. (This post dates back to VS2005.)

Upvotes: 1

Views: 179

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