This patch adds support for the new direct move instructions (MFVSRLD and
MTVSRDD) that simplify moving 128-bit data between GPRs and vector registers.
I have built previous versions of this patch with no regressions. At the
moment, I have built a non-bootstrap build and ran the PowerPC tests, with no
regressions. Assuming the bootstrap build that I've started has no
regressions, is it ok to install in the trunk?
[gcc]
2015-11-08 Michael Meissner <meiss...@linux.vnet.ibm.com>
* config/rs6000/constraints.md (we constraint): New constraint for
64-bit power9 vector support.
(wL constraint): New constraint for the element in a vector that
can be addressed by the MFVSRLD instruction.
* config/rs6000/rs6000.c (rs6000_debug_reg_global): Add ISA 3.0
debugging.
(rs6000_init_hard_regno_mode_ok): If ISA 3.0 and 64-bit, enable we
constraint. Disable the VSX<->GPR direct move helpers if we have
the MFVSRLD and MTVSRDD instructions.
(rs6000_secondary_reload_simple_move): Add support for doing
vector direct moves directly without additional scratch registers
if we have ISA 3.0 instructions.
(rs6000_secondary_reload_direct_move): Update comments.
(rs6000_output_move_128bit): Add support for ISA 3.0 vector
instructions.
* config/rs6000/vsx.md (vsx_mov<mode>): Add support for ISA 3.0
direct move instructions.
(vsx_movti_64bit): Likewise.
(vsx_extract_<mode>): Likewise.
* config/rs6000/rs6000.h (VECTOR_ELEMENT_MFVSRLD_64BIT): New
macros for ISA 3.0 direct move instructions.
(TARGET_DIRECT_MOVE_128): Likewise.
* config/rs6000/rs6000.md (128-bit GPR splitters): Don't split a
128-bit move that is a direct move between GPR and vector
registers using ISA 3.0 direct move instructions.
* doc/md.texi (RS/6000 constraints): Document we, wF, wG, wL
constraints. Update wa documentation to say not to use %x<n> on
instructions that only take Altivec registers.
[gcc/testsuite]
2015-11-08 Michael Meissner <meiss...@linux.vnet.ibm.com>
* gcc.target/powerpc/direct-move-vector.c: New test for 128-bit
vector direct move instructions.
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.vnet.ibm.com, phone: +1 (978) 899-4797
