From 1bc5aee63eb72b341f506ad058502cd0361f0d10 Mon Sep 17 00:00:00 2001 From: Ben Cheng Date: Tue, 25 Mar 2014 22:37:19 -0700 Subject: Initial checkin of GCC 4.9.0 from trunk (r208799). Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba --- gcc-4.9/gcc/config/i386/pentium.md | 306 +++++++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 gcc-4.9/gcc/config/i386/pentium.md (limited to 'gcc-4.9/gcc/config/i386/pentium.md') diff --git a/gcc-4.9/gcc/config/i386/pentium.md b/gcc-4.9/gcc/config/i386/pentium.md new file mode 100644 index 000000000..97fc55e2a --- /dev/null +++ b/gcc-4.9/gcc/config/i386/pentium.md @@ -0,0 +1,306 @@ +;; Pentium Scheduling +;; Copyright (C) 2002-2014 Free Software Foundation, Inc. +;; +;; This file is part of GCC. +;; +;; GCC is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 3, or (at your option) +;; any later version. +;; +;; GCC is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with GCC; see the file COPYING3. If not see +;; . */ +;; +;; The Pentium is an in-order core with two integer pipelines. + +;; True for insns that behave like prefixed insns on the Pentium. +(define_attr "pent_prefix" "false,true" + (if_then_else (ior (eq_attr "prefix_0f" "1") + (ior (eq_attr "prefix_data16" "1") + (eq_attr "prefix_rep" "1"))) + (const_string "true") + (const_string "false"))) + +;; Categorize how an instruction slots. + +;; The non-MMX Pentium slots an instruction with prefixes on U pipe only, +;; while MMX Pentium can slot it on either U or V. Model non-MMX Pentium +;; rules, because it results in noticeably better code on non-MMX Pentium +;; and doesn't hurt much on MMX. (Prefixed instructions are not very +;; common, so the scheduler usually has a non-prefixed insn to pair). + +(define_attr "pent_pair" "uv,pu,pv,np" + (cond [(eq_attr "imm_disp" "true") + (const_string "np") + (ior (eq_attr "type" "alu1,alu,imov,icmp,test,lea,incdec") + (and (eq_attr "type" "pop,push") + (eq_attr "memory" "!both"))) + (if_then_else (eq_attr "pent_prefix" "true") + (const_string "pu") + (const_string "uv")) + (eq_attr "type" "ibr") + (const_string "pv") + (and (eq_attr "type" "ishift") + (match_operand 2 "const_int_operand")) + (const_string "pu") + (and (eq_attr "type" "rotate") + (match_operand 2 "const1_operand")) + (const_string "pu") + (and (eq_attr "type" "ishift1") + (match_operand 1 "const_int_operand")) + (const_string "pu") + (and (eq_attr "type" "rotate1") + (match_operand 1 "const1_operand")) + (const_string "pu") + (and (eq_attr "type" "call") + (match_operand 0 "constant_call_address_operand")) + (const_string "pv") + (and (eq_attr "type" "callv") + (match_operand 1 "constant_call_address_operand")) + (const_string "pv") + ] + (const_string "np"))) + +(define_automaton "pentium,pentium_fpu") + +;; Pentium do have U and V pipes. Instruction to both pipes +;; are always issued together, much like on VLIW. +;; +;; predecode +;; / \ +;; decodeu decodev +;; / | | +;; fpu executeu executev +;; | | | +;; fpu retire retire +;; | +;; fpu +;; We add dummy "port" pipes allocated only first cycle of +;; instruction to specify this behavior. + +(define_cpu_unit "pentium-portu,pentium-portv" "pentium") +(define_cpu_unit "pentium-u,pentium-v" "pentium") +(absence_set "pentium-portu" "pentium-u,pentium-v") +(presence_set "pentium-portv" "pentium-portu") + +;; Floating point instructions can overlap with new issue of integer +;; instructions. We model only first cycle of FP pipeline, as it is +;; fully pipelined. +(define_cpu_unit "pentium-fp" "pentium_fpu") + +;; There is non-pipelined multiplier unit used for complex operations. +(define_cpu_unit "pentium-fmul" "pentium_fpu") + +;; Pentium preserves memory ordering, so when load-execute-store +;; instruction is executed together with other instruction loading +;; data, the execution of the other instruction is delayed to very +;; last cycle of first instruction, when data are bypassed. +;; We model this by allocating "memory" unit when store is pending +;; and using conflicting load units together. + +(define_cpu_unit "pentium-memory" "pentium") +(define_cpu_unit "pentium-load0" "pentium") +(define_cpu_unit "pentium-load1" "pentium") +(absence_set "pentium-load0,pentium-load1" "pentium-memory") + +(define_reservation "pentium-load" "(pentium-load0 | pentium-load1)") +(define_reservation "pentium-np" "(pentium-u + pentium-v)") +(define_reservation "pentium-uv" "(pentium-u | pentium-v)") +(define_reservation "pentium-portuv" "(pentium-portu | pentium-portv)") +(define_reservation "pentium-firstu" "(pentium-u + pentium-portu)") +(define_reservation "pentium-firstv" "(pentium-v + pentium-portuv)") +(define_reservation "pentium-firstuv" "(pentium-uv + pentium-portuv)") +(define_reservation "pentium-firstuload" "(pentium-load + pentium-firstu)") +(define_reservation "pentium-firstvload" "(pentium-load + pentium-firstv)") +(define_reservation "pentium-firstuvload" "(pentium-load + pentium-firstuv) + | (pentium-firstv,pentium-v, + (pentium-load+pentium-firstv))") +(define_reservation "pentium-firstuboth" "(pentium-load + pentium-firstu + + pentium-memory)") +(define_reservation "pentium-firstvboth" "(pentium-load + pentium-firstv + + pentium-memory)") +(define_reservation "pentium-firstuvboth" "(pentium-load + pentium-firstuv + + pentium-memory) + | (pentium-firstv,pentium-v, + (pentium-load+pentium-firstv))") + +;; Few common long latency instructions +(define_insn_reservation "pent_mul" 11 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "imul")) + "pentium-np*11") + +(define_insn_reservation "pent_str" 12 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "str")) + "pentium-np*12") + +;; Integer division and some other long latency instruction block all +;; units, including the FP pipe. There is no value in modeling the +;; latency of these instructions and not modeling the latency +;; decreases the size of the DFA. +(define_insn_reservation "pent_block" 1 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "idiv")) + "pentium-np+pentium-fp") + +;; Moves usually have one cycle penalty, but there are exceptions. +(define_insn_reservation "pent_fmov" 1 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "type" "fmov") + (eq_attr "memory" "none,load"))) + "(pentium-fp+pentium-np)") + +(define_insn_reservation "pent_fpmovxf" 3 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "type" "fmov") + (and (eq_attr "memory" "load,store") + (eq_attr "mode" "XF")))) + "(pentium-fp+pentium-np)*3") + +(define_insn_reservation "pent_fpstore" 2 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "type" "fmov") + (ior (match_operand 1 "immediate_operand") + (eq_attr "memory" "store")))) + "(pentium-fp+pentium-np)*2") + +(define_insn_reservation "pent_imov" 1 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "imov")) + "pentium-firstuv") + +;; Push and pop instructions have 1 cycle latency and special +;; hardware bypass allows them to be paired with other push,pop +;; and call instructions. +(define_bypass 0 "pent_push,pent_pop" "pent_push,pent_pop,pent_call") +(define_insn_reservation "pent_push" 1 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "type" "push") + (eq_attr "memory" "store"))) + "pentium-firstuv") + +(define_insn_reservation "pent_pop" 1 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "pop,leave")) + "pentium-firstuv") + +;; Call and branch instruction can execute in either pipe, but +;; they are only pairable when in the v pipe. +(define_insn_reservation "pent_call" 10 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "call,callv")) + "pentium-firstv,pentium-v*9") + +(define_insn_reservation "pent_branch" 1 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "ibr")) + "pentium-firstv") + +;; Floating point instruction dispatch in U pipe, but continue +;; in FP pipeline allowing other instructions to be executed. +(define_insn_reservation "pent_fp" 3 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "fop,fistp")) + "(pentium-firstu+pentium-fp),nothing,nothing") + +;; First two cycles of fmul are not pipelined. +(define_insn_reservation "pent_fmul" 3 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "fmul")) + "(pentium-firstuv+pentium-fp+pentium-fmul),pentium-fmul,nothing") + +;; Long latency FP instructions overlap with integer instructions, +;; but only last 2 cycles with FP ones. +(define_insn_reservation "pent_fdiv" 39 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "fdiv")) + "(pentium-np+pentium-fp+pentium-fmul), + (pentium-fp+pentium-fmul)*36,pentium-fmul*2") + +(define_insn_reservation "pent_fpspc" 70 + (and (eq_attr "cpu" "pentium") + (eq_attr "type" "fpspc")) + "(pentium-np+pentium-fp+pentium-fmul), + (pentium-fp+pentium-fmul)*67,pentium-fmul*2") + +;; Integer instructions. Load/execute/store takes 3 cycles, +;; load/execute 2 cycles and execute only one cycle. +(define_insn_reservation "pent_uv_both" 3 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "uv") + (eq_attr "memory" "both"))) + "pentium-firstuvboth,pentium-uv+pentium-memory,pentium-uv") + +(define_insn_reservation "pent_u_both" 3 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "pu") + (eq_attr "memory" "both"))) + "pentium-firstuboth,pentium-u+pentium-memory,pentium-u") + +(define_insn_reservation "pent_v_both" 3 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "pv") + (eq_attr "memory" "both"))) + "pentium-firstvboth,pentium-v+pentium-memory,pentium-v") + +(define_insn_reservation "pent_np_both" 3 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "np") + (eq_attr "memory" "both"))) + "pentium-np,pentium-np,pentium-np") + +(define_insn_reservation "pent_uv_load" 2 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "uv") + (eq_attr "memory" "load"))) + "pentium-firstuvload,pentium-uv") + +(define_insn_reservation "pent_u_load" 2 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "pu") + (eq_attr "memory" "load"))) + "pentium-firstuload,pentium-u") + +(define_insn_reservation "pent_v_load" 2 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "pv") + (eq_attr "memory" "load"))) + "pentium-firstvload,pentium-v") + +(define_insn_reservation "pent_np_load" 2 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "np") + (eq_attr "memory" "load"))) + "pentium-np,pentium-np") + +(define_insn_reservation "pent_uv" 1 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "uv") + (eq_attr "memory" "none"))) + "pentium-firstuv") + +(define_insn_reservation "pent_u" 1 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "pu") + (eq_attr "memory" "none"))) + "pentium-firstu") + +(define_insn_reservation "pent_v" 1 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "pv") + (eq_attr "memory" "none"))) + "pentium-firstv") + +(define_insn_reservation "pent_np" 1 + (and (eq_attr "cpu" "pentium") + (and (eq_attr "pent_pair" "np") + (eq_attr "memory" "none"))) + "pentium-np") + -- cgit v1.2.3