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author | Alexander Monakov <amonakov@ispras.ru> | 2022-12-09 20:47:55 +0300 |
---|---|---|
committer | Alexander Monakov <amonakov@ispras.ru> | 2023-01-02 19:38:56 +0300 |
commit | ec1db9017939bb8289c9bd63aace66c0f3957ecd (patch) | |
tree | aefae9b127ebcaf0084efb2d316bad5081b811db /gcc/config | |
parent | cb775ecd6e437de8fdba9a3f173f3787e90e98f2 (diff) | |
download | gcc-ec1db9017939bb8289c9bd63aace66c0f3957ecd.zip gcc-ec1db9017939bb8289c9bd63aace66c0f3957ecd.tar.gz gcc-ec1db9017939bb8289c9bd63aace66c0f3957ecd.tar.bz2 |
i386: correct division modeling in lujiazui.md
Model the divider in Lujiazui processors as a separate automaton to
significantly reduce the overall model size. This should also result
in improved accuracy, as pipe 0 should be able to accept new
instructions while the divider is occupied.
It is unclear why integer divisions are modeled as if pipes 0-3 are all
occupied. I've opted to keep a single-cycle reservation of all four
pipes together, so GCC should continue trying to pack instructions
around a division accordingly.
Currently top three symbols in insn-automata.o are:
106102 r lujiazui_core_check
106102 r lujiazui_core_transitions
196123 r lujiazui_core_min_issue_delay
This patch shrinks all lujiazui tables to:
3 r lujiazui_decoder_min_issue_delay
20 r lujiazui_decoder_transitions
32 r lujiazui_agu_min_issue_delay
126 r lujiazui_agu_transitions
304 r lujiazui_div_base
352 r lujiazui_div_check
352 r lujiazui_div_transitions
1152 r lujiazui_core_min_issue_delay
1592 r lujiazui_agu_translate
1592 r lujiazui_core_translate
1592 r lujiazui_decoder_translate
1592 r lujiazui_div_translate
3952 r lujiazui_div_min_issue_delay
9216 r lujiazui_core_transitions
This continues the work on reducing i386 insn-automata.o size started
with similar fixes for division and multiplication instructions in
znver.md.
gcc/ChangeLog:
PR target/87832
* config/i386/lujiazui.md (lujiazui_div): New automaton.
(lua_div): New unit.
(lua_idiv_qi): Correct unit in the reservation.
(lua_idiv_qi_load): Ditto.
(lua_idiv_hi): Ditto.
(lua_idiv_hi_load): Ditto.
(lua_idiv_si): Ditto.
(lua_idiv_si_load): Ditto.
(lua_idiv_di): Ditto.
(lua_idiv_di_load): Ditto.
(lua_fdiv_SF): Ditto.
(lua_fdiv_SF_load): Ditto.
(lua_fdiv_DF): Ditto.
(lua_fdiv_DF_load): Ditto.
(lua_fdiv_XF): Ditto.
(lua_fdiv_XF_load): Ditto.
(lua_ssediv_SF): Ditto.
(lua_ssediv_load_SF): Ditto.
(lua_ssediv_V4SF): Ditto.
(lua_ssediv_load_V4SF): Ditto.
(lua_ssediv_V8SF): Ditto.
(lua_ssediv_load_V8SF): Ditto.
(lua_ssediv_SD): Ditto.
(lua_ssediv_load_SD): Ditto.
(lua_ssediv_V2DF): Ditto.
(lua_ssediv_load_V2DF): Ditto.
(lua_ssediv_V4DF): Ditto.
(lua_ssediv_load_V4DF): Ditto.
Diffstat (limited to 'gcc/config')
-rw-r--r-- | gcc/config/i386/lujiazui.md | 58 |
1 files changed, 30 insertions, 28 deletions
diff --git a/gcc/config/i386/lujiazui.md b/gcc/config/i386/lujiazui.md index 9046c09f..58a230c 100644 --- a/gcc/config/i386/lujiazui.md +++ b/gcc/config/i386/lujiazui.md @@ -19,8 +19,8 @@ ;; Scheduling for ZHAOXIN lujiazui processor. -;; Modeling automatons for decoders, execution pipes and AGU pipes. -(define_automaton "lujiazui_decoder,lujiazui_core,lujiazui_agu") +;; Modeling automatons for decoders, execution pipes, AGU pipes, and divider. +(define_automaton "lujiazui_decoder,lujiazui_core,lujiazui_agu,lujiazui_div") ;; The rules for the decoder are simple: ;; - an instruction with 1 uop can be decoded by any of the three @@ -55,6 +55,8 @@ (define_cpu_unit "lua_p0,lua_p1,lua_p2,lua_p3" "lujiazui_core") (define_cpu_unit "lua_p4,lua_p5" "lujiazui_agu") +(define_cpu_unit "lua_div" "lujiazui_div") + (define_reservation "lua_p03" "lua_p0|lua_p3") (define_reservation "lua_p12" "lua_p1|lua_p2") (define_reservation "lua_p1p2" "lua_p1+lua_p2") @@ -229,56 +231,56 @@ (and (eq_attr "memory" "none") (and (eq_attr "mode" "QI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p0p1p2p3*21") + "lua_decoder0,lua_p0p1p2p3,lua_div*21") (define_insn_reservation "lua_idiv_qi_load" 25 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "QI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p45,lua_p0p1p2p3*21") + "lua_decoder0,lua_p45,lua_p0p1p2p3,lua_div*21") (define_insn_reservation "lua_idiv_hi" 22 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "HI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p0p1p2p3*22") + "lua_decoder0,lua_p0p1p2p3,lua_div*22") (define_insn_reservation "lua_idiv_hi_load" 26 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "HI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p45,lua_p0p1p2p3*22") + "lua_decoder0,lua_p45,lua_p0p1p2p3,lua_div*22") (define_insn_reservation "lua_idiv_si" 20 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "SI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p0p1p2p3*20") + "lua_decoder0,lua_p0p1p2p3,lua_div*20") (define_insn_reservation "lua_idiv_si_load" 24 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "SI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p45,lua_p0p1p2p3*20") + "lua_decoder0,lua_p45,lua_p0p1p2p3,lua_div*20") (define_insn_reservation "lua_idiv_di" 150 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "DI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p0p1p2p3*150") + "lua_decoder0,lua_p0p1p2p3,lua_div*150") (define_insn_reservation "lua_idiv_di_load" 154 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "DI") (eq_attr "type" "idiv")))) - "lua_decoder0,lua_p45,lua_p0p1p2p3*150") + "lua_decoder0,lua_p45,lua_p0p1p2p3,lua_div*150") ;; x87 floating point operations. @@ -406,42 +408,42 @@ (and (eq_attr "memory" "none") (and (eq_attr "mode" "SF") (eq_attr "type" "fdiv,fpspc")))) - "lua_decodern,lua_p0*15") + "lua_decodern,lua_p0,lua_div*15") (define_insn_reservation "lua_fdiv_SF_load" 19 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "SF") (eq_attr "type" "fdiv,fpspc")))) - "lua_decoder01,lua_p45,lua_p0*15") + "lua_decoder01,lua_p45,lua_p0,lua_div*15") (define_insn_reservation "lua_fdiv_DF" 18 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "DF") (eq_attr "type" "fdiv,fpspc")))) - "lua_decodern,lua_p0*18") + "lua_decodern,lua_p0,lua_div*18") (define_insn_reservation "lua_fdiv_DF_load" 22 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "DF") (eq_attr "type" "fdiv,fpspc")))) - "lua_decoder01,lua_p45,lua_p0*18") + "lua_decoder01,lua_p45,lua_p0,lua_div*18") (define_insn_reservation "lua_fdiv_XF" 22 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "XF") (eq_attr "type" "fdiv,fpspc")))) - "lua_decoder0,lua_p0*22") + "lua_decoder0,lua_p0,lua_div*22") (define_insn_reservation "lua_fdiv_XF_load" 26 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "XF") (eq_attr "type" "fdiv,fpspc")))) - "lua_decoder0,lua_p45,lua_p0*22") + "lua_decoder0,lua_p45,lua_p0,lua_div*22") ;; MMX instructions. @@ -593,84 +595,84 @@ (and (eq_attr "memory" "none") (and (eq_attr "mode" "SF") (eq_attr "type" "ssediv")))) - "lua_decodern,lua_p0*13") + "lua_decodern,lua_p0,lua_div*13") (define_insn_reservation "lua_ssediv_load_SF" 17 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "SF") (eq_attr "type" "ssediv")))) - "lua_decoder01,lua_p45,lua_p0*13") + "lua_decoder01,lua_p45,lua_p0,lua_div*13") (define_insn_reservation "lua_ssediv_V4SF" 23 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "V4SF") (eq_attr "type" "ssediv")))) - "lua_decodern,lua_p0*23") + "lua_decodern,lua_p0,lua_div*23") (define_insn_reservation "lua_ssediv_load_V4SF" 27 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "V4SF") (eq_attr "type" "ssediv")))) - "lua_decoder01,lua_p45,lua_p0*23") + "lua_decoder01,lua_p45,lua_p0,lua_div*23") (define_insn_reservation "lua_ssediv_V8SF" 47 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "V8SF") (eq_attr "type" "ssediv")))) - "lua_decoder0,lua_p0*47") + "lua_decoder0,lua_p0,lua_div*47") (define_insn_reservation "lua_ssediv_load_V8SF" 51 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "V8SF") (eq_attr "type" "ssediv")))) - "lua_decoder0,lua_p45,lua_p0*47") + "lua_decoder0,lua_p45,lua_p0,lua_div*47") (define_insn_reservation "lua_ssediv_SD" 17 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "DF") (eq_attr "type" "ssediv")))) - "lua_decodern,lua_p0*17") + "lua_decodern,lua_p0,lua_div*17") (define_insn_reservation "lua_ssediv_load_SD" 21 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "DF") (eq_attr "type" "ssediv")))) - "lua_decoder01,lua_p45,lua_p0*17") + "lua_decoder01,lua_p45,lua_p0,lua_div*17") (define_insn_reservation "lua_ssediv_V2DF" 30 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "V2DF") (eq_attr "type" "ssediv")))) - "lua_decodern,lua_p0*30") + "lua_decodern,lua_p0,lua_div*30") (define_insn_reservation "lua_ssediv_load_V2DF" 34 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "V2DF") (eq_attr "type" "ssediv")))) - "lua_decoder01,lua_p45,lua_p0*30") + "lua_decoder01,lua_p45,lua_p0,lua_div*30") (define_insn_reservation "lua_ssediv_V4DF" 56 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "none") (and (eq_attr "mode" "V4DF") (eq_attr "type" "ssediv")))) - "lua_decoder0,lua_p0*56") + "lua_decoder0,lua_p0,lua_div*56") (define_insn_reservation "lua_ssediv_load_V4DF" 60 (and (eq_attr "cpu" "lujiazui") (and (eq_attr "memory" "load") (and (eq_attr "mode" "V4DF") (eq_attr "type" "ssediv")))) - "lua_decoder0,lua_p4p5,lua_p0*56") + "lua_decoder0,lua_p4p5,lua_p0,lua_div*56") (define_insn_reservation "lua_sseicvt_si" 2 |