On 25/07/17 15:42, Eric Botcazou wrote:
What is your opinion with respect to a -mno-fsmuld option or something
similar?
Far better in my opinion (at least for LEON3).
Attached is a variant with this option. It touches a lot more files.
--
Sebastian Huber, embedded brains GmbH
Address : Dor
On 25/07/17 16:12, Sebastian Huber wrote:
On 25/07/17 15:42, Eric Botcazou wrote:
What is your opinion with respect to a -mno-fsmuld option or something
similar?
Far better in my opinion (at least for LEON3).
How should I add this option? For example:
diff --git a/gcc/config/sparc/sparc.o
On 25/07/17 15:42, Eric Botcazou wrote:
What is your opinion with respect to a -mno-fsmuld option or something
similar?
Far better in my opinion (at least for LEON3).
How should I add this option? For example:
diff --git a/gcc/config/sparc/sparc.opt b/gcc/config/sparc/sparc.opt
index ae63d2
> What is your opinion with respect to a -mno-fsmuld option or something
> similar?
Far better in my opinion (at least for LEON3).
--
Eric Botcazou
> Yes, everyone using LEON/LEON3 will no longer benefit from the FSMULD
> after this patch. This was discussed with Gaisler. We have to make a
> trade-off between correctness, performance and the number of GCC options.
IMO we shouldn't introduce regressions like this, i.e. people should never be
On 25/07/17 14:59, Sebastian Huber wrote:
On 25/07/17 14:59, Eric Botcazou wrote:
Prominent LEON2 chips like the AT697E and AT697F do not properly
support
the FSMULD instruction. LEON3 targets using the GRFPU-lite floating
point unit do not support the FSMULD in hardware. Disable this
instr
On 25/07/17 14:59, Eric Botcazou wrote:
Prominent LEON2 chips like the AT697E and AT697F do not properly support
the FSMULD instruction. LEON3 targets using the GRFPU-lite floating
point unit do not support the FSMULD in hardware. Disable this
instruction for for all LEON/LEON3 targets for sim
> Prominent LEON2 chips like the AT697E and AT697F do not properly support
> the FSMULD instruction. LEON3 targets using the GRFPU-lite floating
> point unit do not support the FSMULD in hardware. Disable this
> instruction for for all LEON/LEON3 targets for simplicity.
And penalize everyone els
Prominent LEON2 chips like the AT697E and AT697F do not properly support
the FSMULD instruction. LEON3 targets using the GRFPU-lite floating
point unit do not support the FSMULD in hardware. Disable this
instruction for for all LEON/LEON3 targets for simplicity.
This leads to a code size increas
