Fwd: Regardig asm volatile query

[paladin tripathi]

Hi All,

asm volatile (
 "\n\t"
:
: "r" (pu8In4), "r" (s32PosInt), "r" (s16CoeffOrg), "r" (u32PosFrac),
"r" (u8Out), "r" (u32Step), "r" (u32TgtWidth)
: "r2", "r3", "r4", "r5", "r6", "r7", "r8
 );

I have tested the above application with gcc-4.3 and  gcc-4.2 toolchain:-
With gcc-4.2 we are able to compile the aboe code with –O1
#gcc-4.2 reg_org.c -O1

but getting the following error while compiling the code with gcc-4.3
#gcc-4.3 reg_org.c -O1
reg_org.c:12: error: can't find a register in class 'GENERAL_REGS'
while reloading 'asm'
reg_org.c:12: error: 'asm' operand has impossible constraints

I Want to know
1-> why compilation is happening with gcc-4.2 toolchian not with gcc-4.3
2-> what is the difference between gcc-4.2 and gcc4.3 related to asm volatile


Thanks,