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Hi All, I am working on optimization of G.726 codec on C54x processor . I am facing problem while loading long value (32 bit)from memory . DLD instruction need even adrress to load it correctly. my code of laoding this value is given below LD *sp(3),16,A OR *sp(4),A but for laoding negative value for example *sp(3)=>FFFF *sp(4)=>FD40 It is saturating to 0x7fffffff. It is not possible to keep all Long variables in even address . can anybody help me solving this problem . Thanks in advance . Best regards Rani ___________________________________________________ Click below to experience Sooraj Barjatya's latest offering 'Main Prem Ki Diwani Hoon' starring Hrithik Roshan, Abhishek Bachchan & Kareena Kapoor http://www.mpkdh.com |
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Load/store 32bit value
Started by ●June 27, 2003
Reply by ●June 27, 20032003-06-27
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Rani Thayammal- > I am working on optimization of G.726 codec on C54x processor . > I am facing problem while loading long value (32 bit)from memory > . > DLD instruction need even adrress to load it correctly. > my code of laoding this value is given below > > LD *sp(3),16,A > OR *sp(4),A > but for laoding negative value > for example *sp(3)=>FFFF > *sp(4)=>FD40 > It is saturating to 0x7fffffff. > > It is not possible to keep all Long variables in even address . Why not? The C5xxx C compiler does this. It ANDs the stack pointer with 0xFFFE whenever necessary prior to placing long data on the stack. Jeff Brower system engineer Signalogic |
