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Turn off relax optimization http://forum.andestech.com/viewtopic.php?f=25&t=851 |
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Author: | cindy [ Thu Jun 12, 2014 3:42 pm ] |
Post subject: | Turn off relax optimization |
Turn off relax optimization Linker Option: -mno-relax Attachment: nds32le-elf-gcc -O0 -nostartfiles -static -mno-relax -Toutput/.nds32le-elf-mculib-v3_start0x0.x -Xlinker -defsym -Xlinker _stack=0x1000 -o "mem_test2.adx" ./src/mem_test2.o Attachment: No relax: Code: 00000000 <main>: 0: 46 01 23 45 sethi $r0,#0x12345 4: 58 00 06 78 ori $r0,$r0,#0x678 8: 46 f0 00 00 sethi $r15,#0x0 c: 14 07 80 1a swi $r0,[$r15+#0x68] 10: 46 f0 00 00 sethi $r15,#0x0 14: 04 07 80 1a lwi $r0,[$r15+#0x68] 18: 46 f0 00 00 sethi $r15,#0x0 1c: 14 07 80 1c swi $r0,[$r15+#0x70] 20: 46 08 76 54 sethi $r0,#0x87654 24: 58 00 03 21 ori $r0,$r0,#0x321 28: 46 f0 00 00 sethi $r15,#0x0 2c: 14 07 80 1b swi $r0,[$r15+#0x6c] 30: 46 f0 00 00 sethi $r15,#0x0 34: 04 07 80 1b lwi $r0,[$r15+#0x6c] 38: 46 f0 00 00 sethi $r15,#0x0 3c: 14 07 80 1c swi $r0,[$r15+#0x70] 40: d5 e0 j8 0 <main> If you us the relax function Code: 00000000 <main>: 0: 46 01 23 45 sethi $r0,#0x12345 4: 58 00 06 78 ori $r0,$r0,#0x678 8: 3c 0f ff fe swi.gp $r0,[+#-8] c: 3c 0d ff fe lwi.gp $r0,[+#-8] 10: 3c 0e 00 00 swi.gp $r0,[+#0] 14: 46 08 76 54 sethi $r0,#0x87654 18: 58 00 03 21 ori $r0,$r0,#0x321 1c: 3c 0f ff ff swi.gp $r0,[+#-4] 20: 3c 0d ff ff lwi.gp $r0,[+#-4] 24: 3c 0e 00 00 swi.gp $r0,[+#0] 28: d5 ec j8 0 <main> Sample code: Attachment:
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