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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.
This commit is contained in:
foopub 2021-02-26 01:42:11 +00:00 committed by Graham Sanderson
parent f8015f266a
commit be7a655824
1 changed files with 2 additions and 2 deletions
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4
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)
); );
@ -386,4 +386,4 @@ bool clock_configure_gpin(enum clock_index clk_index, uint gpio, uint32_t src_fr
// Now we have the src, auxsrc, and configured the gpio input // Now we have the src, auxsrc, and configured the gpio input
// call clock configure to run the clock from a gpio // call clock configure to run the clock from a gpio
return clock_configure(clk_index, src, auxsrc, src_freq, freq); return clock_configure(clk_index, src, auxsrc, src_freq, freq);
} }