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Esp32 ULP macro function
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| /* r0 = r0 xor r2, spills r1 */ | |
| .macro xor | |
| /* | |
| See https://stackoverflow.com/a/5377173 | |
| int bitwise_XOR(int a, int b) | |
| { | |
| return (a + b) - (a & b) - (a & b); | |
| } | |
| */ | |
| and r1,r0,r2 | |
| add r0,r0,r2 | |
| sub r0,r0,r1 | |
| sub r0,r0,r1 | |
| .endm |
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