Lpc2000

Does this actually happen ?! This is a complete disaster !! I'm more worried about the line above the one you mentioned, which always tries to write a 4 at address 4 (?!) I just tried the code in 3.1 and it generates clean code with -O4. What's your opt level? I need a cold beer after this.

--- James Dabbs <jdabbs@...> wrote: 
> Why is GNU 3.3.2 generating this code? Am I reading 
> this wrong, or am I 
> using the wrong compiler?? 
> 
> Thanks for any insight! 
> 
> void Test(unsigned long Base) 
> { 
> register volatile U8 * TestP = (volatile U8 *)(Base 
> + 0x5555); 
> 60000134: E3A01101 MOV R1,#0x40000000 
> 6000013C: E2802055 ADD R2,R0,#0x55 
> 6000015C: E2801C55 ADD R1,R0,#0x5500 
> 60000160: E2810055 ADD R0,R1,#0x55 
> while (1) 
> 60000140: E3A01004 MOV R1,#0x4 
> 60000164: E3A02004 MOV R2,#0x4 
> { 
> *TestP = 4; 
> 60000144: E5C21000 STRB R1,[R2,#0x0] 
> 60000168: E5C02000 STRB R2,[R0,#0x0] <<-- 
> What is THIS?? 
> *TestP = (*TestP) + 1; 
> 60000148: E5D2C000 LDRB R12,[R2,#0x0] 
> 6000016C: E5D0C000 LDRB R12,[R0,#0x0] 
> 60000170: E28C1001 ADD R1,R12,#0x1 
> 60000174: E5C01000 STRB R1,[R0,#0x0] 
> 60000178: EAFFFFFA B 0x60000168 
> 6000017C: 00 **** Invalid Instruction 
> **** 
> } 
> 



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