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2018-10-30 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/predicates.md (easy_fp_direct_move_constant):
Allow SFmode constants once again.
* config/rs6000/rs6000.md (movsf_const_direct_move): Allow SFmode
constants, but only allow targetting a VSX register.
(movsf_const_mem): Add combiner pattern to store constants in
memory.
(movsf_const_mem2): Likewise.
2018-10-30 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/predicates.md (easy_fp_direct_move_constant):
Disable SFmode constants.
* config/rs6000/rs6000.md (movsf_const_direct_move): Likewise.
2018-10-30 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (UNSPEC_SF_CONST_MEM): New unspecs.
(UNSPEC_SF_CONST_GPR): Likewise.
(movsf_const_direct_move): Rework yet again, don't alais results,
use helper functions instead.
(movsf_const_mem): Likewise.
(movsf_const_gpr): Likewise.
2018-10-28 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.c (rs6000_emit_move): Don't bother testing
if the destination of moving a SFmode constant is not a GPR.
* config/rs6000/rs6000.md (movsf_const_direct_move): Churn, churn,
churn. Combine vsx, gpr, memory cases.
2018-10-28 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/predicates.md (easy_fp_direct_move_constant): Use
TARGET_DIRECT_MOVE_FP_CONSTANT.
* config/rs6000/rs6000.h (TARGET_DIRECT_MOVE_FP_CONSTANT): New
macro to say whether we should optimize loading up floating point
constants by loading them in the GPRs and using direct move to
transfer them over.
* config/rs6000/rs6000.md (UNSPEC_SF_CONSTANT_VSX): Delete.
(movsf_const_direct_move): Use TARGET_DIRECT_MOVE_FP_CONSTANT.
Use p8_mtvsrd_sf to do the direct move.
(movsf_const_internal): Delete, no longer used.
2018-10-28 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (UNSPEC_SF_CONSTANT_MEM): Delete.
(movsf_const_direct_move): Rework again, and move before movsf.
(movsf_const_internal): Likewise.
2018-10-28 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (UNSPEC_SF_CONSTANT): Split into 2
separate unspecs.
(UNSPEC_SF_CONSTANT_VSX): Likewise.
(UNSPEC_SF_CONSTANT_MEM): Likewise.
(movsf_const_direct_move): Go back to just handling VSX
registers. Change UNSPEC.
(movsf_const_internal1): Likewise.
(movsf_const_memory): Rework optimizing storing constant to
memory.
(movsf_const_internal2): Likewise.
2018-10-28 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (movsf_const_direct_move): Rework move
to GPR and memory.
(movsf_const_internal1): Likewise.
(movsf_const_internal2): Likewise.
2018-10-28 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (movsf_const_direct_move): Re-add
support for loading up GPRs. Add support for storing constants to
memory.
(movsf_const_direct_move_internal): Likewise.
(movsf_const_store): Delete, folded into the above functions.
2018-10-27 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (movsf_const_direct_move): Delete
loading up GPRs.
2018-10-27 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (UNSPEC_SF_CONSTANT): New unspec for
moving SFmode constants from GPRs to VSX registers.
(movsf constant splitter): Use int_reg_operand.
(movsf_hardfloat): Don't allow moving SFmode constants that are
generated in the GPR registers to be used in the general move.
(movsf_const_direct_move): Rework.
(movsf_const_direct_move_internal): New insn to move SFmode
constants from GPRs to VSX registers after splitting.
(movsf_const_store): Optimize creating a SFmode constant and
storing it not to move the constant to the VSX registers.
2018-10-26 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/rs6000.md (movsf_const_direct_move): Always
allocate a scratch register due to loop unrolling where things
might move between the GPR registers and VSX registers in the
later stages.
2018-10-26 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/predicates.md (easy_fp_direct_move_constant): Add
support for SFmode.
* config/rs6000/rs6000.c (rs6000_emit_move): Add support to load
up SFmode values into a GPR and moving them to a either a VSX
register using the double format or a GPR register using the
single format.
* config/rs6000/rs6000.md (movsf_const_direct_move): Likewise.
2018-10-26 Michael Meissner <meissner@linux.ibm.com>
* config/rs6000/constraints.md (wG constraint): New constraint for
floating point constants that can be loaded quickly in a GPR and
transfered over to a vector register quickly.
* config/rs6000/predicates.md (easy_fp_direct_move_constant): New
predicate to determine which constants can be loaded without
loading them from memory.
(easy_fp_constant): If easy_fp_mtvsrd_constant is true, the
constant is easy.
* config/rs6000/rs6000.md (movdf constant splitter): Use
int_reg_operand instead of extra code to make sure we are
splitting loading up constants to GPRs.
(mov<mode>_hardfloat64): Add support for loading FP constants into
GPRs and using direct move to move them over.
* doc/md.texi (PowerPC constraints): Document wG constraint.
2018-10-26 Michael Meissner <meissner@linux.ibm.com>
Clone branch subversion id 265537
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