VSQRTPH

VSQRTPH — Compute Square Root of Packed FP16 Values

Opcode/ Instruction	Op/ En	64/32 bit Mode Support	CPUID Feature Flag	Description
EVEX.128.NP.MAP5.W0 51 /r VSQRTPH xmm1{k1}{z}, xmm2/m128/m16bcst	A	V/V	(AVX512_FP16 AND AVX512VL) OR AVX10.1	Compute square roots of the packed FP16 values in xmm2/m128/m16bcst, and store the result in xmm1 subject to writemask k1.
EVEX.256.NP.MAP5.W0 51 /r VSQRTPH ymm1{k1}{z}, ymm2/m256/m16bcst	A	V/V	(AVX512_FP16 AND AVX512VL) OR AVX10.1	Compute square roots of the packed FP16 values in ymm2/m256/m16bcst, and store the result in ymm1 subject to writemask k1.
EVEX.512.NP.MAP5.W0 51 /r VSQRTPH zmm1{k1}{z}, zmm2/m512/m16bcst {er}	AV/V		AVX512_FP16 OR AVX10.1	Compute square roots of the packed FP16 values in zmm2/m512/m16bcst, and store the result in zmm1 subject to writemask k1.

Instruction Operand Encoding

Op/En	Tuple	Operand 1	Operand 2	Operand 3	Operand 4
A	Full	ModRM:reg (w)	ModRM:r/m (r)	N/A	N/A

Description

This instruction performs a packed FP16 square-root computation on the values from source operand and stores the packed FP16 result in the destination operand. The destination elements are updated according to the writemask.

Operation

VSQRTPH dest{k1}, src

VL = 128, 256 or 512
KL ← VL/16
FOR i ← 0 to KL-1:
    IF k1[i] or *no writemask*:
        IF SRC is memory and (EVEX.b = 1):
            tsrc ← src.fp16[0]
        ELSE:
            tsrc ← src.fp16[i]
        DEST.fp16[i] ← SQRT(tsrc)
    ELSE IF *zeroing*:
        DEST.fp16[i] ← 0
    //else DEST.fp16[i] remains unchanged

Intel C/C++ Compiler Intrinsic Equivalent

VSQRTPH __m128h _mm_mask_sqrt_ph (__m128h src, __mmask8 k, __m128h a);
VSQRTPH __m128h _mm_maskz_sqrt_ph (__mmask8 k, __m128h a);
VSQRTPH __m128h _mm_sqrt_ph (__m128h a);
VSQRTPH __m256h _mm256_mask_sqrt_ph (__m256h src, __mmask16 k, __m256h a);
VSQRTPH __m256h _mm256_maskz_sqrt_ph (__mmask16 k, __m256h a);
VSQRTPH __m256h _mm256_sqrt_ph (__m256h a);
VSQRTPH __m512h _mm512_mask_sqrt_ph (__m512h src, __mmask32 k, __m512h a);
VSQRTPH __m512h _mm512_maskz_sqrt_ph (__mmask32 k, __m512h a);
VSQRTPH __m512h _mm512_sqrt_ph (__m512h a);
VSQRTPH __m512h _mm512_mask_sqrt_round_ph (__m512h src, __mmask32 k, __m512h a, const int rounding);
VSQRTPH __m512h _mm512_maskz_sqrt_round_ph (__mmask32 k, __m512h a, const int rounding);
VSQRTPH __m512h _mm512_sqrt_round_ph (__m512h a, const int rounding);

SIMD Floating-Point Exceptions

Invalid, Precision, Denormal.

Other Exceptions

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Source: Intel® 64 and IA-32 Architectures Software Developer's Manual, Combined Volumes (Order Number 325462-091US, March 2026)
Generated: 7-6-2026