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Lpc2000

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Re: [lpc2100] What Tha..?

2004-01-24 by Ben Dooks

On Fri, Jan 23, 2004 at 03:37:38PM -0500, James Dabbs 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 ****
> 	}

there seems to be some mysterious missing space between
the addresses of several instructions, ie, 60000148 then 6000016c
with no indication if there is any more data inbetween?

-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.

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