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Replace unavailable flag-preserving instruction

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It seems sub requires thumb2 instructions which are unavailable. This is in line with the rest of the sdk code base which uses subs.
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foopub 2021-02-26 01:42:11 +00:00 committed by graham sanderson
parent e371f6af60
commit 542b86e5db
1 changed files with 2 additions and 2 deletions
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2
src/rp2_common/hardware_clocks/clocks.c
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@ -79,7 +79,7 @@ bool clock_configure(enum clock_index clk_index, uint32_t src, uint32_t auxsrc,
uint delay_cyc = configured_freq[clk_sys] / configured_freq[clk_index] + 1; uint delay_cyc = configured_freq[clk_sys] / configured_freq[clk_index] + 1;
asm volatile ( asm volatile (
"1: \n\t" "1: \n\t"
"sub %0, #1 \n\t" "subs %0, #1 \n\t"
"bne 1b" "bne 1b"
: "+r" (delay_cyc) : "+r" (delay_cyc)
); );