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Source code

SQRTPS

Square Root of Single Precision Floating-Point Values

stableVMJITAOTinstruction

Encodings

OpcodeInstructionOp/En64-bitCompat/LegacyDescription
NP 0F 51 /rSQRTPS xmm1, xmm2/m128AValidValidComputes Square Roots of the packed single precision floating-point values in xmm2/m128 and stores the result in xmm1.
VEX.128.0F.WIG 51 /rVSQRTPS xmm1, xmm2/m128AValidValidComputes Square Roots of the packed single precision floating-point values in xmm2/m128 and stores the result in xmm1.
VEX.256.0F.WIG 51/rVSQRTPS ymm1, ymm2/m256AValidValidComputes Square Roots of the packed single precision floating-point values in ymm2/m256 and stores the result in ymm1.
EVEX.128.0F.W0 51 /rVSQRTPS xmm1 {k1}{z}, xmm2/m128/m32bcstBValidValidComputes Square Roots of the packed single precision AVX512F) OR floating-point values in xmm2/m128/m32bcst and stores AVX10.1 the result in xmm1 subject to writemask k1.
EVEX.256.0F.W0 51 /rVSQRTPS ymm1 {k1}{z}, ymm2/m256/m32bcstBValidValidComputes Square Roots of the packed single precision AVX512F) OR floating-point values in ymm2/m256/m32bcst and stores AVX10.1 the result in ymm1 subject to writemask k1.
EVEX.512.0F.W0 51/rVSQRTPS zmm1 {k1}{z}, zmm2/m512/m32bcst{er}BValidValidComputes Square Roots of the packed single precision OR AVX10.1 floating-point values in zmm2/m512/m32bcst and stores the result in zmm1 subject to writemask k1.

Operand encoding

Each mode is a value of the Op/En column above. It says which field of the encoded instruction carries each operand, in the order they are written, and whether the instruction reads it, writes it or both.

A

  1. modrm.reg escrituraModRM byte, reg field (bits 5-3)
  2. modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

B

  1. modrm.reg escrituraModRM byte, reg field (bits 5-3)
  2. modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

Tupla: Full

Measured cost

Loading measurements from arch-data...

Description

Performs a SIMD computation of the square roots of the four, eight or sixteen packed single precision floating-point values in the source operand (second operand) stores the packed single precision floating-point results in the destination operand.

EVEX.512 encoded versions: The source operand is a ZMM/YMM/XMM register, a 512/256/128-bit memory location or a 512/256/128-bit vector broadcasted from a 32-bit memory location. The destination operand is a ZMM/YMM/XMM register updated according to the writemask.

VEX.256 encoded version: The source operand is a YMM register or a 256-bit memory location. The destination operand is a YMM register. The upper bits (MAXVL-1:256) of the corresponding ZMM register destination are zeroed.

VEX.128 encoded version: the source operand second source operand or a 128-bit memory location. The destination operand is an XMM register. The upper bits (MAXVL-1:128) of the corresponding ZMM register destination are zeroed.

128-bit Legacy SSE version: The second source can be an XMM register or 128-bit memory location. The destination is not distinct from the first source XMM register and the upper bits (MAXVL-1:128) of the corresponding ZMM register destination are unmodified.

Note: VEX.vvvv and EVEX.vvvv are reserved and must be 1111b otherwise instructions will #UD.

Operation

VSQRTPS (EVEX Encoded Versions)

(KL, VL) = (4, 128), (8, 256), (16, 512)

IF (VL = 512) AND (EVEX.b = 1) AND (SRC *is register*)

     THEN

          SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);

     ELSE

          SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);

FI;

FOR j := 0 TO KL-1

     i := j * 32

     IF k1[j] OR *no writemask* THEN

                  IF (EVEX.b = 1) AND (SRC *is memory*)

                       THEN DEST[i+31:i] := SQRT(SRC[31:0])

                       ELSE DEST[i+31:i] := SQRT(SRC[i+31:i])

                  FI;

          ELSE

                  IF *merging-masking*    ; merging-masking

                       THEN *DEST[i+31:i] remains unchanged*

                       ELSE               ; zeroing-masking

                       DEST[i+31:i] := 0

                  FI

     FI;

ENDFOR

DEST[MAXVL-1:VL] := 0

VSQRTPS (VEX.256 Encoded Version)
DEST[31:0] := SQRT(SRC[31:0])
DEST[63:32] := SQRT(SRC[63:32])
DEST[95:64] := SQRT(SRC[95:64])
DEST[127:96] := SQRT(SRC[127:96])
DEST[159:128] := SQRT(SRC[159:128])
DEST[191:160] := SQRT(SRC[191:160])
DEST[223:192] := SQRT(SRC[223:192])
DEST[255:224] := SQRT(SRC[255:224])

VSQRTPS (VEX.128 Encoded Version)
DEST[31:0] := SQRT(SRC[31:0])
DEST[63:32] := SQRT(SRC[63:32])
DEST[95:64] := SQRT(SRC[95:64])
DEST[127:96] := SQRT(SRC[127:96])
DEST[MAXVL-1:128] := 0

SQRTPS (128-bit Legacy SSE Version)
DEST[31:0] := SQRT(SRC[31:0])
DEST[63:32] := SQRT(SRC[63:32])
DEST[95:64] := SQRT(SRC[95:64])
DEST[127:96] := SQRT(SRC[127:96])
DEST[MAXVL-1:128] (Unmodified)

Intel C/C++ compiler intrinsics

VSQRTPS __m512 _mm512_sqrt_round_ps(__m512 a, int r);
VSQRTPS __m512 _mm512_mask_sqrt_round_ps(__m512 s, __mmask16 k, __m512 a, int r);
VSQRTPS __m512 _mm512_maskz_sqrt_round_ps( __mmask16 k, __m512 a, int r);
VSQRTPS __m256 _mm256_sqrt_ps (__m256 a);
VSQRTPS __m256 _mm256_mask_sqrt_ps(__m256 s, __mmask8 k, __m256 a, int r);
VSQRTPS __m256 _mm256_maskz_sqrt_ps( __mmask8 k, __m256 a, int r);
SQRTPS __m128 _mm_sqrt_ps (__m128 a);
VSQRTPS __m128 _mm_mask_sqrt_ps(__m128 s, __mmask8 k, __m128 a, int r);
VSQRTPS __m128 _mm_maskz_sqrt_ps( __mmask8 k, __m128 a, int r);

SIMD Floating-Point Exceptions

Invalid, Precision, Denormal.

Other Exceptions

Non-EVEX-encoded instruction, see Table 2-19, "Type 2 Class Exception Conditions," additionally:

#UD               If VEX.vvvv != 1111B.

EVEX-encoded instruction, see Table 2-48, "Type E2 Class Exception Conditions," additionally:

#UD               If EVEX.vvvv != 1111B.

Sources