__lasx_xvfscaleb_s
LASX intrinsic · group: Undocumented Intrinsics
Synopsis
__m256 __lasx_xvfscaleb_s (__m256 a, __m256i b)
#include <lasxintrin.h>
Instruction: xvfscaleb.s xr, xr, xr
CPU Flags: LASX
Description
Compute IEEE 754 scaleB (multiply by 2^b) of single precision floating point elements in a using integer exponents in b. Currently undocumented.
Operation
for (int i = 0; i < 8; i++) {
dst.fp32[i] = __builtin_scalbn(a.fp32[i], b.word[i]);
}
Tested on real machine.
Latency and Throughput
| CPU | µarch | Latency | Throughput (IPC) |
|---|---|---|---|
| 3C6000 | LA664 | 4 | 2 |