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Hi all, this post to documentate the first (and I hope the last) great (almost for me) difference from version 4.0 to 5.0 of Metrowerks CodeWarrior. When I want to set or read a DSP register in version 4.0 I write simply, for example: *ipr=0xfe06; or short_var=*ADCA_ADRSLT0; and the compiler use in the first case only one instruction (immediate addressing without use any register) and in the second case read the value of the register put it in X0 register and then put the contents of the X0 inside the memory location of "short_var". In version 5.0 the same instructions are coded in a different mode: no more immediate addressing but only indirect; so the first line is coded in this mode: 1) put the address of the register in R0 2) put the value to write into in X0 3) make a move instruction with indirect addressing A simply question: why of this difference? Matteo Cardin |