| --- Log opened Wed Mar 11 00:00:16 2015 | ||
| stekern | olofk: no, I don't think that's possible | 03:57 |
|---|---|---|
| -!- FreezingAlt is now known as FreezingCold | 04:07 | |
| olofk | stekern: I somewhat suspect that too | 06:34 |
| stekern | is that a problem though? Don't you have memory? | 06:54 |
| stekern | isn't that where the bootloader is going to copy data? | 06:54 |
| olofk | stekern: True. Just figured it would be easy to avoid using the memory at all except for writing the image | 06:59 |
| olofk | And if I can get away from using memory I should be able to use it with small modifications to write to Flash too | 07:00 |
| stekern | true | 07:07 |
| bandvig | I’ve got a question about –mdouble-float option in OR1K’s gcc. | 11:22 |
| bandvig | The target help stays “Allow hardware floating-point instructions to cover both 32-bit and 64-bit operations”. | 11:22 |
| bandvig | Is “mdouble-float” suitable for 64-bit only implementation of OpenRISC? Or is it supposed to combine pairs of GPRs in 32-bit OpenRISC? | 11:22 |
| juliusb | bandvig: pretty sure GCC will know how to arrange the data into pairs of registers, but of course you'll need a double precision FPU | 13:10 |
| juliusb | I mean, the data type is no different from a long word in or1k, and GCC knows how to handle those | 13:11 |
| bandvig | juliusb: actually, my hidden goal is to propose an extension to OpenRISC-32. | 13:31 |
| bandvig | The extension should combine pairs of GPRs and use the pairs as sources and destination for FPU-64. | 13:32 |
| bandvig | At the same time I see in Architectural Manual, that each odd GPR starting from R[13] is “Temporary register” while each even GPR starting from R[14] is “Collee-saved register”. So a have an additional question. | 13:32 |
| bandvig | How GCC handles “long word”? Does it mean that GCC logically combines odd+odd and even_even? | 13:33 |
| stekern | bandvig: with mdouble-float it emits lf.xxx.d instructions | 13:42 |
| stekern | https://raw.githubusercontent.com/openrisc/or1k-gcc/or1k/gcc/config/or1k/or1k.md | 13:45 |
| stekern | search for TARGET_DOUBLE_FLOAT | 13:45 |
| olofk | Looks like synopsys has released a pretty nice FPGA board to play with their ARC CPU | 14:48 |
| olofk | I see a pretty good OpenRISC board :) | 14:48 |
| olofk | https://embarc.org/platforms.html | 14:49 |
| juliusb | agree olofk! lx150 Spartan 6, loads of SDRAM and fair bit of flash,only $99 too, that's impressive. | 18:26 |
| juliusb | I don't quite get what they aim to win with this | 18:26 |
| olofk | juliusb: They're trying to charm the IoT movement, but I really can't understand who would want to use it for that | 19:56 |
| olofk | FuseSoC got a new contributor. I'm always amazed when that happens :) | 19:59 |
| --- Log closed Thu Mar 12 00:00:18 2015 | ||
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