aboutsummaryrefslogtreecommitdiffstats
path: root/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0026-Patch-microblaze-8-stage-pipeline-for-microblaze.patch
blob: 506714bd3ee7e74132e95ddf026102d6ea17bcdc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
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