I backported the changes for adding the ISA 3.0 C min/max and floating point
scalar compare generating a mask (for conditional move) to the GCC 6.2 branch.
The changes in this patch were checked into the trunk on May 25th (with one
patch from May 18th from a patch set that has not been backported yet). I did
a bootstrap and make check, and there were no regresions.
[gcc]
2016-06-02 Michael Meissner <meiss...@linux.vnet.ibm.com>
Back port from trunk
2016-05-26 Michael Meissner <meiss...@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (rs6000_emit_p9_fp_minmax): New function
for ISA 3.0 min/max support.
(rs6000_emit_p9_fp_cmove): New function for ISA 3.0 floating point
conditional move support.
(rs6000_emit_cmove): Call rs6000_emit_p9_fp_minmax and
rs6000_emit_p9_fp_cmove if the ISA 3.0 instructions are
available.
* config/rs6000/rs6000.md (SFDF2): New iterator to allow doing
conditional moves where the comparison type is different from move
type.
(fp_minmax): New code iterator for smin/smax.
(minmax): New code attributes for min/max.
(SMINMAX): Likewise.
(smax<mode>3): Combine min, max insns into one insn using the
fp_minmax code iterator. Add support for ISA 3.0 min/max
instructions that don't need -ffast-math.
(s<minmax><mode>3): Likewise.
(smax<mode>3_vsx): Likewise.
(smin<mode>3): Likewise.
(s<minmax><mode>3_vsx): Likewise.
(smin<mode>3_vsx): Likewise.
(pre-VSX min/max splitters): Likewise.
(s<minmax><mode>3_fpr): Likewise.
(movsfcc): Rewrite floating point conditional moves to combine
SFmode/DFmode into a single insn.
(mov<mode>cc): Likewise.
(movdfcc): Likewise.
(fselsfsf4): Combine FSEL cases into a single insn, using SFDF and
SFDF2 iterators to handle all combinations.
(fseldfsf4): Likewise.
(fsel<SFDF:mode><SFDF2:mode>4): Likewise.
(fseldfdf4): Likewise.
(fselsfdf4): Likewise.
(mov<SFDF:mode><SFDF2:mode>cc_p9): Add support for the ISA 3.0
comparison instructions that set a 0/-1 mask, and use it for
floating point conditional move via XXSEL.
(fpmask<mode>): Likewise.
(xxsel<mode>): Likewise.
* config/rs6000/predicates.md (min_max_operator): Delete, no
longer used.
(fpmask_comparison_operaton): New insn for ISA 3.0 comparison
instructions that generate a 0/-1 mask for use with XXSEL.
* config/rs6000/rs6000.h (TARGET_MINMAX_SF): New helper macros to
say whether floating point min/max is available, either through
FSEL, ISA 2.06 min/max, and ISA 3.0 min/max instrucitons.
(TARGET_MINMAX_DF): Likewise.
Back port from trunk
2016-05-18 Michael Meissner <meiss...@linux.vnet.ibm.com>
* config/rs6000/predicate.md (all_ones_constant): New predicate
for vector constant with all 1's set.
[gcc/testsuite]
2016-06-02 Michael Meissner <meiss...@linux.vnet.ibm.com>
Back port from trunk
2016-05-26 Michael Meissner <meiss...@linux.vnet.ibm.com>
* gcc.target/powerpc/p9-minmax-1.c: New tests for ISA 3.0
floating point min/max/comparison instructions.
* gcc.target/powerpc/p9-minmax-2.c: Likewise.
--
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
