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[avr-libc-dev] [bug #28756] Bug in AVR libc 1.6.7 (power.h for 8-bit AVR


From: Timur Gilfanov
Subject: [avr-libc-dev] [bug #28756] Bug in AVR libc 1.6.7 (power.h for 8-bit AVR)
Date: Mon, 01 Feb 2010 12:52:17 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.0.249.78 Safari/532.5

Follow-up Comment #3, bug #28756 (project avr-libc):

I'm have his bug in WinAVR 20100110 too. In clock_prescale_set(x) I found
infinity loop and error disappear when I remove loop:
WinAVR 20100110 power.h:
#define clock_prescale_set(x) 
do { 
        uint8_t tmp = _BV(CLKPCE); 
        __asm__ __volatile__ ( 
                "in __tmp_reg__,__SREG__" "nt" 
                "cli" "nt" 
                "sts %1, %0" "nt" 
                "sts %1, %2" "nt" 
                "out __SREG__, __tmp_reg__" 
                : /* no outputs */ 
                : "d" (tmp), 
                  "M" (_SFR_MEM_ADDR(CLKPR)), 
                  "d" (x) 
                : "r0"); 
} while (0)

WinAVR 20090313 power.h:
#define clock_prescale_set(x) 
{ 
        uint8_t tmp = _BV(CLKPCE); 
        __asm__ __volatile__ ( 
                "in __tmp_reg__,__SREG__" "nt" 
                "cli" "nt" 
                "sts %1, %0" "nt" 
                "sts %1, %2" "nt" 
                "out __SREG__, __tmp_reg__" 
                : /* no outputs */ 
                : "d" (tmp), 
                  "M" (_SFR_MEM_ADDR(CLKPR)), 
                  "d" (x) 
                : "r0"); 
}


(file #19590, file #19591)
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Additional Item Attachment:

File name: power.h                        Size:57 KB
File name: power.h                        Size:60 KB


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