diff options
Diffstat (limited to 'meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0026-Patch-microblaze-8-stage-pipeline-for-microblaze.patch')
-rw-r--r-- | meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0026-Patch-microblaze-8-stage-pipeline-for-microblaze.patch | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0026-Patch-microblaze-8-stage-pipeline-for-microblaze.patch b/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0026-Patch-microblaze-8-stage-pipeline-for-microblaze.patch new file mode 100644 index 00000000..506714bd --- /dev/null +++ b/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0026-Patch-microblaze-8-stage-pipeline-for-microblaze.patch @@ -0,0 +1,193 @@ +From 64e76f3be6ad78044ea2b89b555a07758c2b2950 Mon Sep 17 00:00:00 2001 +From: Mahesh Bodapati <mbodapat@xilinx.com> +Date: Tue, 17 Jan 2017 19:50:34 +0530 +Subject: [PATCH 26/54] [Patch, microblaze]: 8-stage pipeline for microblaze + This patch adds the support for the 8-stage pipeline. The new 8-stage + pipeline reduces the latencies of float & integer division drastically + +Signed-off-by :Nagaraju Mekala <nmekala@xilix.com> + +ChangeLog: +2016-01-18 Nagaraju Mekala <nmekala@xilix.com> + + *microblaze.md (define_automaton mbpipe_8): New + + *microblaze.c (microblaze_option_override): Update + Updated the logic to generate only when MB version is 10.0 + + *microblaze.h (pipeline_type): Update + Update the enum with MICROBLAZE_PIPE_8 + + *microblaze.opt (mxl-frequency): New + New flag added for 8-stage pipeline +--- + gcc/config/microblaze/microblaze.c | 13 ++++++ + gcc/config/microblaze/microblaze.h | 3 +- + gcc/config/microblaze/microblaze.md | 79 +++++++++++++++++++++++++++++++++++- + gcc/config/microblaze/microblaze.opt | 4 ++ + 4 files changed, 96 insertions(+), 3 deletions(-) + +diff --git a/gcc/config/microblaze/microblaze.c b/gcc/config/microblaze/microblaze.c +index daf0269..3832d16 100644 +--- a/gcc/config/microblaze/microblaze.c ++++ b/gcc/config/microblaze/microblaze.c +@@ -1772,6 +1772,19 @@ microblaze_option_override (void) + warning (0, "-mxl-reorder requires -mxl-pattern-compare for -mcpu=v8.30.a"); + TARGET_REORDER = 0; + } ++ ver = ver_int - microblaze_version_to_int("v10.0"); ++ if (ver < 0) ++ { ++ if (TARGET_AREA_OPTIMIZED_2) ++ warning (0, "-mxl-frequency can be used only with -mcpu=v10.0 or greater"); ++ } ++ else ++ { ++ if (TARGET_AREA_OPTIMIZED_2) ++ microblaze_pipe = MICROBLAZE_PIPE_8; ++ if (TARGET_BARREL_SHIFT) ++ microblaze_has_bitfield = 1; ++ } + + if (TARGET_MULTIPLY_HIGH && TARGET_SOFT_MUL) + error ("-mxl-multiply-high requires -mno-xl-soft-mul"); +diff --git a/gcc/config/microblaze/microblaze.h b/gcc/config/microblaze/microblaze.h +index 9f74ec8..2ac5aeec 100644 +--- a/gcc/config/microblaze/microblaze.h ++++ b/gcc/config/microblaze/microblaze.h +@@ -27,7 +27,8 @@ + enum pipeline_type + { + MICROBLAZE_PIPE_3 = 0, +- MICROBLAZE_PIPE_5 = 1 ++ MICROBLAZE_PIPE_5 = 1, ++ MICROBLAZE_PIPE_8 = 2 + }; + + #define MICROBLAZE_MASK_NO_UNSAFE_DELAY 0x00000001 +diff --git a/gcc/config/microblaze/microblaze.md b/gcc/config/microblaze/microblaze.md +index bc675ca..6395533 100644 +--- a/gcc/config/microblaze/microblaze.md ++++ b/gcc/config/microblaze/microblaze.md +@@ -35,6 +35,7 @@ + (R_GOT 20) ;; GOT ptr reg + (MB_PIPE_3 0) ;; Microblaze 3-stage pipeline + (MB_PIPE_5 1) ;; Microblaze 5-stage pipeline ++ (MB_PIPE_8 2) ;; Microblaze 8-stage pipeline + (UNSPEC_SET_GOT 101) ;; + (UNSPEC_GOTOFF 102) ;; GOT offset + (UNSPEC_PLT 103) ;; jump table +@@ -80,7 +81,7 @@ + ;; bshift Shift operations + + (define_attr "type" +- "unknown,branch,jump,call,load,store,move,arith,darith,imul,idiv,icmp,multi,nop,no_delay_arith,no_delay_load,no_delay_store,no_delay_imul,no_delay_move,bshift,fadd,frsub,fmul,fdiv,fcmp,fsl,fsqrt,fcvt,trap" ++ "unknown,branch,jump,call,load,store,move,arith,darith,imul,idiv,icmp,multi,nop,no_delay_arith,no_delay_load,no_delay_store,no_delay_imul,no_delay_move,bshift,fadd,frsub,fmul,fdiv,fcmp,fsl,fsqrt,fcvt,fint,trap" + (const_string "unknown")) + + ;; Main data type used by the insn +@@ -222,6 +223,80 @@ + ;;----------------------------------------------------------------- + + ++ ++;;---------------------------------------------------------------- ++;; Microblaze 8-stage pipeline description (v10.0 and later) ++;;---------------------------------------------------------------- ++ ++(define_automaton "mbpipe_8") ++(define_cpu_unit "mb8_issue,mb8_iu,mb8_wb,mb8_fpu,mb8_fpu_2,mb8_mul,mb8_mul_2,mb8_div,mb8_div_2,mb8_bs,mb8_bs_2" "mbpipe_8") ++ ++(define_insn_reservation "mb8-integer" 1 ++ (and (eq_attr "type" "branch,jump,call,arith,darith,icmp,nop,no_delay_arith") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_iu,mb8_wb") ++ ++(define_insn_reservation "mb8-special-move" 2 ++ (and (eq_attr "type" "move") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_iu*2,mb8_wb") ++ ++(define_insn_reservation "mb8-mem-load" 3 ++ (and (eq_attr "type" "load,no_delay_load") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_iu,mb8_wb") ++ ++(define_insn_reservation "mb8-mem-store" 1 ++ (and (eq_attr "type" "store,no_delay_store") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_iu,mb8_wb") ++ ++(define_insn_reservation "mb8-mul" 3 ++ (and (eq_attr "type" "imul,no_delay_imul") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_mul,mb8_mul_2*2,mb8_wb") ++ ++(define_insn_reservation "mb8-div" 30 ++ (and (eq_attr "type" "idiv") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_div,mb8_div_2*29,mb8_wb") ++ ++(define_insn_reservation "mb8-bs" 2 ++ (and (eq_attr "type" "bshift") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_bs,mb8_bs_2,mb8_wb") ++ ++(define_insn_reservation "mb8-fpu-add-sub-mul" 1 ++ (and (eq_attr "type" "fadd,frsub,fmul") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_fpu,mb8_wb") ++ ++(define_insn_reservation "mb8-fpu-fcmp" 3 ++ (and (eq_attr "type" "fcmp") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_fpu,mb8_fpu*2,mb8_wb") ++ ++(define_insn_reservation "mb8-fpu-div" 24 ++ (and (eq_attr "type" "fdiv") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_fpu,mb8_fpu_2*23,mb8_wb") ++ ++(define_insn_reservation "mb8-fpu-sqrt" 23 ++ (and (eq_attr "type" "fsqrt") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_fpu,mb8_fpu_2*22,mb8_wb") ++ ++(define_insn_reservation "mb8-fpu-fcvt" 1 ++ (and (eq_attr "type" "fcvt") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_fpu,mb8_wb") ++ ++(define_insn_reservation "mb8-fpu-fint" 2 ++ (and (eq_attr "type" "fint") ++ (eq (symbol_ref "microblaze_pipe") (const_int MB_PIPE_8))) ++ "mb8_issue,mb8_fpu,mb8_wb") ++ ++ + ;;---------------------------------------------------------------- + ;; Microblaze 5-stage pipeline description (v5.00.a and later) + ;;---------------------------------------------------------------- +@@ -468,7 +543,7 @@ + (fix:SI (match_operand:SF 1 "register_operand" "d")))] + "TARGET_HARD_FLOAT && TARGET_FLOAT_CONVERT" + "fint\t%0,%1" +- [(set_attr "type" "fcvt") ++ [(set_attr "type" "fint") + (set_attr "mode" "SF") + (set_attr "length" "4")]) + +diff --git a/gcc/config/microblaze/microblaze.opt b/gcc/config/microblaze/microblaze.opt +index 8242998..c8e6f00 100644 +--- a/gcc/config/microblaze/microblaze.opt ++++ b/gcc/config/microblaze/microblaze.opt +@@ -129,3 +129,7 @@ Use hardware prefetch instruction + + mxl-mode-xilkernel + Target ++ ++mxl-frequency ++Target Mask(AREA_OPTIMIZED_2) ++Use 8 stage pipeline (frequency optimization) +-- +2.7.4 + |