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as3525: find_first_set_bit() isn't built in bootloaders

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We assume only one bit is set and use clz to find the most significant
set bit, if there's more than one bit set we'll see it in the panic msg

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26285 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-05-25 16:20:04 +00:00
parent 02068ed6cd
commit 873dd7becc
1 changed files with 1 additions and 1 deletions
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2
firmware/target/arm/as3525/system-as3525.c
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@ -98,7 +98,7 @@ static void UIRQ(void)
if(status == 0) if(status == 0)
panicf("Unhandled IRQ (source unknown!)"); panicf("Unhandled IRQ (source unknown!)");
unsigned irq_no = find_first_set_bit(status); unsigned irq_no = 31 - __builtin_clz(status);
panicf("Unhandled %smasked IRQ %02X: %s (status 0x%8X)", panicf("Unhandled %smasked IRQ %02X: %s (status 0x%8X)",
masked ? "" : "no", irq_no, irqname[irq_no], status); masked ? "" : "no", irq_no, irqname[irq_no], status);