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| .global memcpy_threshold_asm | |
| memcpy_threshold_asm: | |
| push {fp} | |
| add fp, sp, #0 // Push new Stack Frame | |
| // Arg 0: r0: Destination Address | |
| // Arg 1: r1: Source Address | |
| // Arg 2: r2: Count | |
| // Arg 3: r3: Threshold Minimum | |
| lsr r2, #4 // Shift count right by 4 bits (divide by 16, 16 bytes = 128 bits) | |
| vdup.8 q3, r3 // Write threshold to q3 | |
| _loop: | |
| // Load into Q0 | |
| vld1.64 d0, [r1]! | |
| vld1.64 d1, [r1]! | |
| vcgt.u8 q1, q0, q3 // Will set all to 1 if Greater | |
| vand.u8 q2, q1, q0 // AND the new set, result is in q2 | |
| // Load out of Q2 | |
| vst1.64 d4, [r0]! | |
| vst1.64 d5, [r0]! | |
| sub r2, r2, #1 | |
| cmp r2, #0 | |
| bgt _loop | |
| sub sp, fp, #0 // Pop our Stack Frame | |
| pop {fp} | |
| bx lr |