Method vqrdmulhq_laneq_s32
vqrdmulhq_laneq_s32(v128, v128, int)
Signed saturating Rounding Doubling Multiply returning High half (by element). This instruction multiplies each vector element in the first source SIMD&FP register by the specified vector element of the second source SIMD&FP register, doubles the results, places the most significant half of the final results into a vector, and writes the vector to the destination SIMD&FP register.The results are rounded. For truncated results, see SQDMULH.If any of the results overflows, they are saturated. If saturation occurs, the cumulative saturation bit FPSR.QC is set.Depending on the settings in the CPACR_EL1, CPTR_EL2, and CPTR_EL3 registers, and the current Security state and Exception level, an attempt to execute the instruction might be trapped.
Equivalent instruction: SQRDMULH Vd.4S,Vn.4S,Vm.S[lane]
Declaration
public static v128 vqrdmulhq_laneq_s32(v128 a0, v128 a1, int a2)Parameters
| Type | Name | Description |
|---|---|---|
| v128 | a0 | 128-bit vector a0 |
| v128 | a1 | 128-bit vector a1 |
| int | a2 | Lane index to a1. Must be an immediate in the range of [0..3] |
Returns
| Type | Description |
|---|---|
| v128 | 128-bit vector |