linux-stable.git/arch/powerpc/include/asm/ppc-opcode.h, branch v3.7

powerpc: Add denormalisation exception handling for POWER6/7

2012-09-17T06:31:47+00:00

On POWER6 and POWER7 if the input operand to an instruction is a
denormalised single precision binary floating point value we can take
a denormalisation exception where it's expected that the hypervisor
(HV=1) will fix up the inputs before the instruction is run.

This adds code to handle this denormalisation exception for POWER6 and
POWER7.

It also add a CONFIG_PPC_DENORMALISATION option and sets it in
pseries/ppc64_defconfig.

This is useful on bare metal systems only.  Based on patch from Milton
Miller.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Enforce usage of RA 0-R31 where possible

2012-07-10T09:18:35+00:00

Some macros use RA where when RA=R0 the values is 0, so make this
the enforced mnemonic in the macro.

Idea suggested by Andreas Schwab.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Add defines for RA 0-R31

2012-07-10T09:18:33+00:00

R0 is special since it'll be 0.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Enforce usage of R0-R31 where possible

2012-07-10T09:18:30+00:00

Enforce the use of R0-R31 in macros where possible now we have all the
fixes in.

R0-R31 macros are removed here so that can't be used anymore.  They
should not be defined anywhere.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Introduce new __REG_R macros

2012-07-10T09:18:27+00:00

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Start using ___PPC_RA/B/S/T where necessary

2012-07-10T09:18:25+00:00

Now have ___PPC_RA/B/S/T we can use it in some places.  These are
places where we can't use the existing defines which will soon enforce
R0-R31 usage.

The macros being changed here are being used in inline asm, which
can't convert to enforce the R0-R31 usage.

bpf_jit uses a mix of both generated and non-generated with the same
code, so just convert all these to use the ___PPC_R versions which
won't enforce R usage later.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Introduce new ___PPC_RA/B/S/T macros

2012-07-10T09:18:22+00:00

These are currently the same as __PPC_RA/B/S/T but we'll wrap them
soon.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Fix VSX macros so register names aren't wrapped

2012-07-10T09:18:19+00:00

We need to do this so we can enforce the name of a and b in called
macros PPC_RA/B later.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc/pasemi: Move lbz/stbciz to ppc-opcode.h

2012-07-10T09:18:00+00:00

move lbz/stbciz to ppc-opcode.h.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Add defines for R0-R31

2012-07-10T09:17:50+00:00

We are going to use these later and convert r0 to %r0 etc.

Signed-off-by: Michael Neuling 
Signed-off-by: Benjamin Herrenschmidt