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Diffstat (limited to 'contrib/gcc/config/i386/ppro.md')
| -rw-r--r-- | contrib/gcc/config/i386/ppro.md | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/contrib/gcc/config/i386/ppro.md b/contrib/gcc/config/i386/ppro.md new file mode 100644 index 0000000..8690685 --- /dev/null +++ b/contrib/gcc/config/i386/ppro.md @@ -0,0 +1,150 @@ +;; Pentium Pro/PII Scheduling +;; Copyright (C) 2002 Free Software Foundation, Inc. +;; +;; This file is part of GNU CC. +;; +;; GNU CC 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 2, or (at your option) +;; any later version. +;; +;; GNU CC 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 GNU CC; see the file COPYING. If not, write to +;; the Free Software Foundation, 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. */ + +;; Categorize how many uops an ia32 instruction evaluates to: +;; one -- an instruction with 1 uop can be decoded by any of the +;; three decoders. +;; few -- an instruction with 1 to 4 uops can be decoded only by +;; decoder 0. +;; many -- a complex instruction may take an unspecified number of +;; cycles to decode in decoder 0. + +(define_attr "ppro_uops" "one,few,many" + (cond [(eq_attr "type" "other,multi,call,callv,fpspc,str") + (const_string "many") + (eq_attr "type" "icmov,fcmov,str,cld") + (const_string "few") + (eq_attr "type" "imov") + (if_then_else (eq_attr "memory" "store,both") + (const_string "few") + (const_string "one")) + (eq_attr "memory" "!none") + (const_string "few") + ] + (const_string "one"))) + +;; +;; The PPro has an out-of-order core, but the instruction decoders are +;; naturally in-order and asymmetric. We get best performance by scheduling +;; for the decoders, for in doing so we give the oo execution unit the +;; most choices. +;; +;; Rough readiness numbers. Fine tuning happens in i386.c. +;; +;; p0 describes port 0. +;; p01 describes ports 0 and 1 as a pair; alu insns can issue to either. +;; p2 describes port 2 for loads. +;; p34 describes ports 3 and 4 for stores. +;; fpu describes the fpu accessed via port 0. +;; ??? It is less than clear if there are separate fadd and fmul units +;; that could operate in parallel. +;; +;; ??? fxch isn't handled; not an issue until sched3 after reg-stack is real. + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "ishift,rotate,ishift1,rotate1,lea,ibr,cld")) + 1 1) + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "imul")) + 4 1) + +;; ??? Does the divider lock out the pipe while it works, +;; or is there a disconnected unit? +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "idiv")) + 17 17) + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fop,fsgn,fistp")) + 3 1) + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fcmov")) + 2 1) + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fcmp")) + 1 1) + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fmov")) + 1 1) + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fmul")) + 5 1) + +(define_function_unit "ppro_p0" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fdiv,fpspc")) + 56 1) + +(define_function_unit "ppro_p01" 2 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "!imov,fmov")) + 1 1) + +(define_function_unit "ppro_p01" 2 0 + (and (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "imov,fmov")) + (eq_attr "memory" "none")) + 1 1) + +(define_function_unit "ppro_p2" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (ior (eq_attr "type" "pop") + (eq_attr "memory" "load,both"))) + 3 1) + +(define_function_unit "ppro_p34" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (ior (eq_attr "type" "push") + (eq_attr "memory" "store,both"))) + 1 1) + +(define_function_unit "fpu" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fop,fsgn,fmov,fcmp,fcmov,fistp")) + 1 1) + +(define_function_unit "fpu" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fmul")) + 5 2) + +(define_function_unit "fpu" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "fdiv,fpspc")) + 56 56) + +;; imul uses the fpu. ??? does it have the same throughput as fmul? +(define_function_unit "fpu" 1 0 + (and (eq_attr "cpu" "pentiumpro") + (eq_attr "type" "imul")) + 4 1) |
