From be1c970c1cd43cf9327c4f9352afc168e55fb560 Mon Sep 17 00:00:00 2001 From: jiwang Date: Tue, 19 Jan 2016 14:10:49 +0000 Subject: [PATCH] [PATCH 3/4] Add support for rtx costing of CCMP on AArch64 2015-01-19 Wilco Dijkstra gcc/ * /config/aarch64/aarch64.c (aarch64_if_then_else_costs): Add support for CCMP costing. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232564 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 5 +++++ gcc/config/aarch64/aarch64.c | 20 ++++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 319bb92b2b89..a9cc4e462e52 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2016-01-19 Wilco Dijkstra + * /config/aarch64/aarch64.c (aarch64_if_then_else_costs): + Add support for CCMP costing. + +2015-01-19 Wilco Dijkstra + * ccmp.c (ccmp_candidate_p): Remove integer-only restriction. * config/aarch64/aarch64.md (fccmp): New pattern. (fccmpe): Likewise. diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 9e9b42462216..03bc1b97c2be 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. */ -- 2.47.3