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optimized 

Signed-off-by: liangkangnan <liangkangnan@163.com>
pull/1/head
liangkangnan 2020-04-18 11:39:27 +08:00
parent 18577d9b61
commit 73098bdcd8
5 changed files with 121 additions and 193 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tests/example/timer_int/Makefile
View File

@ -6,7 +6,7 @@ TARGET = timer_int
CFLAGS += -DSIMULATION
#CFLAGS += -O2
CFLAGS += -Os
#ASM_SRCS +=
#LDFLAGS +=
#INCLUDES += -I.

16
tests/example/timer_int/main.c
View File

@ -6,23 +6,17 @@
static volatile uint32_t count;
static volatile uint8_t int_flag;
int main()
{
count = 0;
int_flag = 0;
#ifdef SIMULATION
TIMER0_REG(TIMER0_VALUE) = 500; // 10us period
TIMER0_REG(TIMER0_CTRL) = 0x07; // enable interrupt and start timer
while (1) {
if (int_flag) {
TIMER0_REG(TIMER0_CTRL) |= (1 << 0); // restart timer
int_flag = 0;
count++;
if (count == 2) {
TIMER0_REG(TIMER0_CTRL) = 0x00; // stop timer
count = 0;
@ -31,7 +25,6 @@ int main()
break;
}
}
}
#else
TIMER0_REG(TIMER0_VALUE) = 500000; // 10ms period
TIMER0_REG(TIMER0_CTRL) = 0x07; // enable interrupt and start timer
@ -39,17 +32,12 @@ int main()
GPIO_REG(GPIO_DATA) = 0x1;
while (1) {
if (int_flag) {
TIMER0_REG(TIMER0_CTRL) |= (1 << 0); // restart timer
int_flag = 0;
count++;
// 500ms
if (count == 50) {
count = 0;
GPIO_REG(GPIO_DATA) ^= 0x1; // toggle led
}
}
}
#endif
return 0;
@ -57,7 +45,7 @@ int main()
void timer0_irq_handler()
{
TIMER0_REG(TIMER0_CTRL) |= (1 << 2); // clear int pending
TIMER0_REG(TIMER0_CTRL) |= (1 << 2) | (1 << 0); // clear int pending and start timer
int_flag = 1;
count++;
}

BIN
tests/example/timer_int/timer_int
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BIN
tests/example/timer_int/timer_int.bin
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276
tests/example/timer_int/timer_int.dump
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@ -11,7 +11,7 @@ Disassembly of section .init:
c: ff810113 addi sp,sp,-8 # 10002000 <_sp>
10: 00000d13 li s10,0
14: 00000d93 li s11,0
18: 2d800513 li a0,728
18: 1f800513 li a0,504
1c: 10000597 auipc a1,0x10000
20: fe458593 addi a1,a1,-28 # 10000000 <_data>
24: 10000617 auipc a2,0x10000
@ -29,8 +29,8 @@ Disassembly of section .init:
54: 00052023 sw zero,0(a0)
58: 00450513 addi a0,a0,4
5c: feb56ce3 bltu a0,a1,54 <_start+0x54>
60: 250000ef jal ra,2b0 <_init>
64: 10c000ef jal ra,170 <main>
60: 188000ef jal ra,1e8 <_init>
64: 00c000ef jal ra,70 <main>
68: 00100d13 li s10,1
0000006c <loop>:
@ -38,169 +38,113 @@ Disassembly of section .init:
Disassembly of section .text:
00000070 <trap_entry>:
70: f8010113 addi sp,sp,-128
74: 00112223 sw ra,4(sp)
78: 00212423 sw sp,8(sp)
7c: 00312623 sw gp,12(sp)
80: 00412823 sw tp,16(sp)
84: 00512a23 sw t0,20(sp)
88: 00612c23 sw t1,24(sp)
8c: 00712e23 sw t2,28(sp)
90: 02812023 sw s0,32(sp)
94: 02912223 sw s1,36(sp)
98: 02a12423 sw a0,40(sp)
9c: 02b12623 sw a1,44(sp)
a0: 02c12823 sw a2,48(sp)
a4: 02d12a23 sw a3,52(sp)
a8: 02e12c23 sw a4,56(sp)
ac: 02f12e23 sw a5,60(sp)
b0: 05012023 sw a6,64(sp)
b4: 05112223 sw a7,68(sp)
b8: 05212423 sw s2,72(sp)
bc: 05312623 sw s3,76(sp)
c0: 05412823 sw s4,80(sp)
c4: 05512a23 sw s5,84(sp)
c8: 05612c23 sw s6,88(sp)
cc: 05712e23 sw s7,92(sp)
d0: 07812023 sw s8,96(sp)
d4: 07912223 sw s9,100(sp)
d8: 07c12823 sw t3,112(sp)
dc: 07d12a23 sw t4,116(sp)
e0: 07e12c23 sw t5,120(sp)
e4: 07f12e23 sw t6,124(sp)
e8: 34202573 csrr a0,mcause
ec: 198000ef jal ra,284 <trap_handler>
f0: 00412083 lw ra,4(sp)
f4: 00812103 lw sp,8(sp)
f8: 00c12183 lw gp,12(sp)
fc: 01012203 lw tp,16(sp)
100: 01412283 lw t0,20(sp)
104: 01812303 lw t1,24(sp)
108: 01c12383 lw t2,28(sp)
10c: 02012403 lw s0,32(sp)
110: 02412483 lw s1,36(sp)
114: 02812503 lw a0,40(sp)
118: 02c12583 lw a1,44(sp)
11c: 03012603 lw a2,48(sp)
120: 03412683 lw a3,52(sp)
124: 03812703 lw a4,56(sp)
128: 03c12783 lw a5,60(sp)
12c: 04012803 lw a6,64(sp)
130: 04412883 lw a7,68(sp)
134: 04812903 lw s2,72(sp)
138: 04c12983 lw s3,76(sp)
13c: 05012a03 lw s4,80(sp)
140: 05412a83 lw s5,84(sp)
144: 05812b03 lw s6,88(sp)
148: 05c12b83 lw s7,92(sp)
14c: 06012c03 lw s8,96(sp)
150: 06412c83 lw s9,100(sp)
154: 07012e03 lw t3,112(sp)
158: 07412e83 lw t4,116(sp)
15c: 07812f03 lw t5,120(sp)
160: 07c12f83 lw t6,124(sp)
164: 08010113 addi sp,sp,128
168: 30200073 mret
16c: 0000006f j 16c <trap_entry+0xfc>
00000070 <main>:
70: 10000797 auipc a5,0x10000
74: f807a823 sw zero,-112(a5) # 10000000 <_data>
78: 200007b7 lui a5,0x20000
7c: 1f400713 li a4,500
80: 00e7a423 sw a4,8(a5) # 20000008 <_sp+0xfffe008>
84: 00700713 li a4,7
88: 00e7a023 sw a4,0(a5)
8c: 10000697 auipc a3,0x10000
90: f7468693 addi a3,a3,-140 # 10000000 <_data>
94: 00200793 li a5,2
98: 0006a703 lw a4,0(a3)
9c: fef71ee3 bne a4,a5,98 <main+0x28>
a0: 200007b7 lui a5,0x20000
a4: 0007a023 sw zero,0(a5) # 20000000 <_sp+0xfffe000>
a8: 10000797 auipc a5,0x10000
ac: f407ac23 sw zero,-168(a5) # 10000000 <_data>
b0: 00100d93 li s11,1
b4: 00000513 li a0,0
b8: 00008067 ret
00000170 <main>:
170: ff010113 addi sp,sp,-16
174: 00812623 sw s0,12(sp)
178: 01010413 addi s0,sp,16
17c: 10000797 auipc a5,0x10000
180: e8478793 addi a5,a5,-380 # 10000000 <_data>
184: 0007a023 sw zero,0(a5)
188: 10000797 auipc a5,0x10000
18c: e7c78793 addi a5,a5,-388 # 10000004 <int_flag>
190: 00078023 sb zero,0(a5)
194: 200007b7 lui a5,0x20000
198: 00878793 addi a5,a5,8 # 20000008 <_sp+0xfffe008>
19c: 1f400713 li a4,500
1a0: 00e7a023 sw a4,0(a5)
1a4: 200007b7 lui a5,0x20000
1a8: 00700713 li a4,7
1ac: 00e7a023 sw a4,0(a5) # 20000000 <_sp+0xfffe000>
1b0: 10000797 auipc a5,0x10000
1b4: e5478793 addi a5,a5,-428 # 10000004 <int_flag>
1b8: 0007c783 lbu a5,0(a5)
1bc: 0ff7f793 andi a5,a5,255
1c0: fe0788e3 beqz a5,1b0 <main+0x40>
1c4: 200007b7 lui a5,0x20000
1c8: 0007a703 lw a4,0(a5) # 20000000 <_sp+0xfffe000>
1cc: 200007b7 lui a5,0x20000
1d0: 00176713 ori a4,a4,1
1d4: 00e7a023 sw a4,0(a5) # 20000000 <_sp+0xfffe000>
1d8: 10000797 auipc a5,0x10000
1dc: e2c78793 addi a5,a5,-468 # 10000004 <int_flag>
1e0: 00078023 sb zero,0(a5)
1e4: 10000797 auipc a5,0x10000
1e8: e1c78793 addi a5,a5,-484 # 10000000 <_data>
1ec: 0007a783 lw a5,0(a5)
1f0: 00178713 addi a4,a5,1
1f4: 10000797 auipc a5,0x10000
1f8: e0c78793 addi a5,a5,-500 # 10000000 <_data>
1fc: 00e7a023 sw a4,0(a5)
200: 10000797 auipc a5,0x10000
204: e0078793 addi a5,a5,-512 # 10000000 <_data>
208: 0007a703 lw a4,0(a5)
20c: 00200793 li a5,2
210: faf710e3 bne a4,a5,1b0 <main+0x40>
214: 200007b7 lui a5,0x20000
218: 0007a023 sw zero,0(a5) # 20000000 <_sp+0xfffe000>
21c: 10000797 auipc a5,0x10000
220: de478793 addi a5,a5,-540 # 10000000 <_data>
224: 0007a023 sw zero,0(a5)
228: 00100d93 li s11,1
22c: 00000013 nop
230: 00000793 li a5,0
234: 00078513 mv a0,a5
238: 00c12403 lw s0,12(sp)
23c: 01010113 addi sp,sp,16
240: 00008067 ret
000000bc <trap_entry>:
bc: f8010113 addi sp,sp,-128
c0: 00112223 sw ra,4(sp)
c4: 00212423 sw sp,8(sp)
c8: 00312623 sw gp,12(sp)
cc: 00412823 sw tp,16(sp)
d0: 00512a23 sw t0,20(sp)
d4: 00612c23 sw t1,24(sp)
d8: 00712e23 sw t2,28(sp)
dc: 02812023 sw s0,32(sp)
e0: 02912223 sw s1,36(sp)
e4: 02a12423 sw a0,40(sp)
e8: 02b12623 sw a1,44(sp)
ec: 02c12823 sw a2,48(sp)
f0: 02d12a23 sw a3,52(sp)
f4: 02e12c23 sw a4,56(sp)
f8: 02f12e23 sw a5,60(sp)
fc: 05012023 sw a6,64(sp)
100: 05112223 sw a7,68(sp)
104: 05212423 sw s2,72(sp)
108: 05312623 sw s3,76(sp)
10c: 05412823 sw s4,80(sp)
110: 05512a23 sw s5,84(sp)
114: 05612c23 sw s6,88(sp)
118: 05712e23 sw s7,92(sp)
11c: 07812023 sw s8,96(sp)
120: 07912223 sw s9,100(sp)
124: 07c12823 sw t3,112(sp)
128: 07d12a23 sw t4,116(sp)
12c: 07e12c23 sw t5,120(sp)
130: 07f12e23 sw t6,124(sp)
134: 34202573 csrr a0,mcause
138: 0ac000ef jal ra,1e4 <trap_handler>
13c: 00412083 lw ra,4(sp)
140: 00812103 lw sp,8(sp)
144: 00c12183 lw gp,12(sp)
148: 01012203 lw tp,16(sp)
14c: 01412283 lw t0,20(sp)
150: 01812303 lw t1,24(sp)
154: 01c12383 lw t2,28(sp)
158: 02012403 lw s0,32(sp)
15c: 02412483 lw s1,36(sp)
160: 02812503 lw a0,40(sp)
164: 02c12583 lw a1,44(sp)
168: 03012603 lw a2,48(sp)
16c: 03412683 lw a3,52(sp)
170: 03812703 lw a4,56(sp)
174: 03c12783 lw a5,60(sp)
178: 04012803 lw a6,64(sp)
17c: 04412883 lw a7,68(sp)
180: 04812903 lw s2,72(sp)
184: 04c12983 lw s3,76(sp)
188: 05012a03 lw s4,80(sp)
18c: 05412a83 lw s5,84(sp)
190: 05812b03 lw s6,88(sp)
194: 05c12b83 lw s7,92(sp)
198: 06012c03 lw s8,96(sp)
19c: 06412c83 lw s9,100(sp)
1a0: 07012e03 lw t3,112(sp)
1a4: 07412e83 lw t4,116(sp)
1a8: 07812f03 lw t5,120(sp)
1ac: 07c12f83 lw t6,124(sp)
1b0: 08010113 addi sp,sp,128
1b4: 30200073 mret
1b8: 0000006f j 1b8 <trap_entry+0xfc>
00000244 <timer0_irq_handler>:
244: ff010113 addi sp,sp,-16
248: 00812623 sw s0,12(sp)
24c: 01010413 addi s0,sp,16
250: 200007b7 lui a5,0x20000
254: 0007a703 lw a4,0(a5) # 20000000 <_sp+0xfffe000>
258: 200007b7 lui a5,0x20000
25c: 00476713 ori a4,a4,4
260: 00e7a023 sw a4,0(a5) # 20000000 <_sp+0xfffe000>
264: 10000797 auipc a5,0x10000
268: da078793 addi a5,a5,-608 # 10000004 <int_flag>
26c: 00100713 li a4,1
270: 00e78023 sb a4,0(a5)
274: 00000013 nop
278: 00c12403 lw s0,12(sp)
27c: 01010113 addi sp,sp,16
280: 00008067 ret
000001bc <timer0_irq_handler>:
1bc: 20000737 lui a4,0x20000
1c0: 00072783 lw a5,0(a4) # 20000000 <_sp+0xfffe000>
1c4: 0057e793 ori a5,a5,5
1c8: 00f72023 sw a5,0(a4)
1cc: 10000717 auipc a4,0x10000
1d0: e3470713 addi a4,a4,-460 # 10000000 <_data>
1d4: 00072783 lw a5,0(a4)
1d8: 00178793 addi a5,a5,1
1dc: 00f72023 sw a5,0(a4)
1e0: 00008067 ret
00000284 <trap_handler>:
284: fe010113 addi sp,sp,-32
288: 00112e23 sw ra,28(sp)
28c: 00812c23 sw s0,24(sp)
290: 02010413 addi s0,sp,32
294: fea42623 sw a0,-20(s0)
298: fadff0ef jal ra,244 <timer0_irq_handler>
29c: 00000013 nop
2a0: 01c12083 lw ra,28(sp)
2a4: 01812403 lw s0,24(sp)
2a8: 02010113 addi sp,sp,32
2ac: 00008067 ret
000001e4 <trap_handler>:
1e4: fd9ff06f j 1bc <timer0_irq_handler>
000002b0 <_init>:
2b0: ff010113 addi sp,sp,-16
2b4: 00812623 sw s0,12(sp)
2b8: 01010413 addi s0,sp,16
2bc: 00000797 auipc a5,0x0
2c0: db478793 addi a5,a5,-588 # 70 <trap_entry>
2c4: 30579073 csrw mtvec,a5
2c8: 00000013 nop
2cc: 00c12403 lw s0,12(sp)
2d0: 01010113 addi sp,sp,16
2d4: 00008067 ret
000001e8 <_init>:
1e8: 00000797 auipc a5,0x0
1ec: ed478793 addi a5,a5,-300 # bc <trap_entry>
1f0: 30579073 csrw mtvec,a5
1f4: 00008067 ret
Disassembly of section .bss:
@ -208,10 +152,6 @@ Disassembly of section .bss:
10000000: 0000 unimp
...
10000004 <int_flag>:
10000004: 0000 unimp
...
Disassembly of section .stack:
10001800 <_sp-0x800>:
@ -224,11 +164,11 @@ Disassembly of section .comment:
4: 2820 fld fs0,80(s0)
6: 20554e47 fmsub.s ft8,fa0,ft5,ft4,rmm
a: 434d li t1,19
c: 2055 jal b0 <trap_entry+0x40>
c: 2055 jal b0 <main+0x40>
e: 6345 lui t1,0x11
10: 696c flw fa1,84(a0)
12: 7370 flw fa2,100(a4)
14: 2065 jal bc <trap_entry+0x4c>
14: 2065 jal bc <trap_entry>
16: 4952 lw s2,20(sp)
18: 562d4353 0x562d4353
1c: 4520 lw s0,72(a0)