Created
November 2, 2017 12:38
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AVR inline assembly 8bit multiplication upper half
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| #define HMUL( ans, b1, b2 ) \ | |
| asm volatile( \ | |
| "mul %1, %2\n\t" \ | |
| "mov %0, r1\n\t" \ | |
| : "=l"(ans) \ | |
| : "d"(b1), "d"(b2) \ | |
| ); | |
| #define HMULS( ans, b1, b2 ) \ | |
| asm volatile( \ | |
| "muls %1, %2\n\t" \ | |
| "mov %0, r1\n\t" \ | |
| : "=l"(ans) \ | |
| : "d"(b1), "d"(b2) \ | |
| ); |
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