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Hi all!
I am implementing G.729E speech codec on TI DSP TMS320C5402 dsk as my mini project. In the particular project I am able to run the available standard C code on the dsk but to implement that in real time, i need to optimize some of the functions of basic_op.c. so i tried to write them in assembly language, i have written assembly code for L_mac which i am pasting here for your reference. In order to get advantage of DSP i am using the MAC instruction available for the chip, but the problem is whenever i used the condition of overflow ie. ssbx ovm it gives me error, and if i don't include that condition in the assembly program then it passes only two test vector correctly, and for the remaining test vectors it gives error as "DIvision error var1 = 16384 var2 !938", so can anyone of you who have already implemented the codec suggest solution to my problem the assembly code for L_mac is as below: =============================================== _L_mac: ssbx sxm LD #8000h,B xor 1h,B AND #65535,B BC LP2,BNEQ LD #8000h,B xor 2h,B AND #65535,B BC LP2,BNEQ ST #1h,*(_Overflow) LD #7fffh,16,B OR #65535,B ADD B,A RET LP2: LD 2h,T SSBX FRCT ssbx ovm MAC 1h, A RSBX FRCT rsbx ovm BC LP1,AOV RET LP1: ST #1h, *(_Overflow) RET thanx in advance. Prashant |
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G.729E Speech Codec onC54x
Started by ●April 2, 2002
Reply by ●April 3, 20022002-04-03
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Hello, Why dont you try using intrinsics. It is available in "intrindefs.h". Santosh -----Original Message----- From: plgajare [mailto:] Sent: Tuesday, April 02, 2002 9:16 AM To: Subject: [c54x] G.729E Speech Codec onC54x Hi all! I am implementing G.729E speech codec on TI DSP TMS320C5402 dsk as my mini project. In the particular project I am able to run the available standard C code on the dsk but to implement that in real time, i need to optimize some of the functions of basic_op.c. so i tried to write them in assembly language, i have written assembly code for L_mac which i am pasting here for your reference. In order to get advantage of DSP i am using the MAC instruction available for the chip, but the problem is whenever i used the condition of overflow ie. ssbx ovm it gives me error, and if i don't include that condition in the assembly program then it passes only two test vector correctly, and for the remaining test vectors it gives error as "DIvision error var1 = 16384 var2 !938", so can anyone of you who have already implemented the codec suggest solution to my problem the assembly code for L_mac is as below: =============================================== _L_mac: ssbx sxm LD #8000h,B xor 1h,B AND #65535,B BC LP2,BNEQ LD #8000h,B xor 2h,B AND #65535,B BC LP2,BNEQ ST #1h,*(_Overflow) LD #7fffh,16,B OR #65535,B ADD B,A RET LP2: LD 2h,T SSBX FRCT ssbx ovm MAC 1h, A RSBX FRCT rsbx ovm BC LP1,AOV RET LP1: ST #1h, *(_Overflow) RET thanx in advance. Prashant _____________________________________ Note: If you do a simple "reply" with your email client, only the author of this message will receive your answer. You need to do a "reply all" if you want your answer to be distributed to the entire group. _____________________________________ About this discussion group: To Join: Send an email to To Post: Send an email to To Leave: Send an email to Archives: http://www.yahoogroups.com/group/c54x Other Groups: http://www.dsprelated.com ">http://docs.yahoo.com/info/terms/ |
