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Mircea, Richard, All, On Tuesday 08 November 2011 18:18:49 Richard Earnshaw wrote: > On 08/11/11 12:23, Mircea Gherzan wrote: > > I can't check the coding for I can't compile a simple: > > void my_vstmia(void) > > { > > __asm__("stc p11, cr8, [ip], #64"); > > __asm__("vstmia ip!, {d8 - d51}"); > > } > > That's a heck of a lot of double-precision registers! Perhaps you meant > D15, not D51. Aha! Good catch! :-) Compiled with Mircea's original toolchain settings, and changing 'd51' to 'd15' as spotted by Richard, I was able to compile that code snippet (notice however the -O0 to not optimise at all): $ arm-unknown-linux-gnueabi-gcc -march=armv7-a -mcpu=cortex-a9 \ -mfpu=vfpv3-d16 -mhard-float \ -O0 -o ess.o -c ess.c $ arm-unknown-linux-gnueabi-objdump -d ess.o [--SNIP--] 00000000 <my_vstmia>: 0: e52db004 push {fp} ; (str fp, [sp, #-4]!) 4: e28db000 add fp, sp, #0 8: ecac8b10 vstmia ip!, {d8-d15} c: ecac8b10 vstmia ip!, {d8-d15} 10: e28bd000 add sp, fp, #0 14: e8bd0800 pop {fp} 18: e12fff1e bx lr At any optimisation level, -O{s,1,2,3}, the assembly now looks like: 00000000 <my_vstmia>: 0: ecac8b10 vstmia ip!, {d8-d15} 4: ecac8b10 vstmia ip!, {d8-d15} 8: e12fff1e bx lr So yes, the stc and the vstmia opcodes in the code snippet above are both encoded into the same assembly instruction. But still, it does not tell whether it's due to 'as' being smart, or the two opcodes actually being the same in that situation... Anyway, I would highly be surprised that eglibc would not run on non-VFP hardware at all. So definitely, it looks (to me) like a bug in QEMU. Regards, Yann E. MORIN. -- .-----------------.--------------------.------------------.--------------------. | Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: | | +33 662 376 056 | Software Designer | \ / CAMPAIGN | ___ | | +33 223 225 172 `------------.-------: X AGAINST | \e/ There is no | | http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL | v conspiracy. | '------------------------------^-------^------------------^--------------------' -- For unsubscribe information see http://sourceware.org/lists.html#faq
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