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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2016-01-19 14:10:49 +0000 |
|---|---|---|
| committer | Jiong Wang <jiwang@gcc.gnu.org> | 2016-01-19 14:10:49 +0000 |
| commit | 786298dc13355be8942ad82002d4c675e7255299 (patch) | |
| tree | 9f09294a664da4ef9168cf89218105e733e7cbcc | |
| parent | 786e3c064c93b9283ff6a1a990d3caeb993b7ec4 (diff) | |
| download | gcc-786298dc13355be8942ad82002d4c675e7255299.zip gcc-786298dc13355be8942ad82002d4c675e7255299.tar.gz gcc-786298dc13355be8942ad82002d4c675e7255299.tar.bz2 | |
[PATCH 3/4] Add support for rtx costing of CCMP on AArch64
2015-01-19 Wilco Dijkstra <wdijkstr@arm.com>
gcc/
* /config/aarch64/aarch64.c (aarch64_if_then_else_costs):
Add support for CCMP costing.
From-SVN: r232564
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 20 |
2 files changed, 25 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 319bb92..a9cc4e4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2016-01-19 Wilco Dijkstra <wdijkstr@arm.com> + * /config/aarch64/aarch64.c (aarch64_if_then_else_costs): + Add support for CCMP costing. + +2015-01-19 Wilco Dijkstra <wdijkstr@arm.com> + * ccmp.c (ccmp_candidate_p): Remove integer-only restriction. * config/aarch64/aarch64.md (fccmp<mode>): New pattern. (fccmpe<mode>): Likewise. diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 9e9b424..03bc1b9 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -6004,6 +6004,26 @@ aarch64_if_then_else_costs (rtx op0, rtx op1, rtx op2, int *cost, bool speed) } else if (GET_MODE_CLASS (GET_MODE (inner)) == MODE_CC) { + /* CCMP. */ + if ((GET_CODE (op1) == COMPARE) && CONST_INT_P (op2)) + { + /* Increase cost of CCMP reg, 0, imm, CC to prefer CMP reg, 0. */ + if (XEXP (op1, 1) == const0_rtx) + *cost += 1; + if (speed) + { + machine_mode mode = GET_MODE (XEXP (op1, 0)); + const struct cpu_cost_table *extra_cost + = aarch64_tune_params.insn_extra_cost; + + if (GET_MODE_CLASS (mode) == MODE_INT) + *cost += extra_cost->alu.arith; + else + *cost += extra_cost->fp[mode == DFmode].compare; + } + return true; + } + /* It's a conditional operation based on the status flags, so it must be some flavor of CSEL. */ |