VCVTUQQ2PS

VCVTUQQ2PS — Convert Packed Unsigned Quadword Integers to Packed Single-Precision Floating-Point Values

Opcode/ Instruction	Op / En	64/32 bit Mode Support	CPUID Feature Flag	Description
EVEX.128.F2.0F.W1 7A /r VCVTUQQ2PS xmm1 {k1}{z}, xmm2/m128/m64bcst	A	V/V	AVX512VL AVX512DQ	Convert two packed unsigned quadword integers from xmm2/m128/m64bcst to packed single-precision floating- point values in zmm1 with writemask k1.
EVEX.256.F2.0F.W1 7A /r VCVTUQQ2PS xmm1 {k1}{z}, ymm2/m256/m64bcst	A	V/V	AVX512VL AVX512DQ	Convert four packed unsigned quadword integers from ymm2/m256/m64bcst to packed single-precision floating- point values in xmm1 with writemask k1.
EVEX.512.F2.0F.W1 7A /r VCVTUQQ2PS ymm1 {k1}{z}, zmm2/m512/m64bcst{er}	A	V/V	AVX512DQ	Convert eight packed unsigned quadword integers from zmm2/m512/m64bcst to eight packed single-precision floating-point values in zmm1 with writemask k1.

Instruction Operand Encoding

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

Description

Converts packed unsigned quadword integers in the source operand (second operand) to single-precision floating- point values in the destination operand (first operand).

EVEX encoded versions: The source operand is a ZMM/YMM/XMM register or a 512/256/128-bit memory location. The destination operand is a YMM/XMM/XMM (low 64 bits) register conditionally updated with writemask k1.

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

Operation

VCVTUQQ2PS (EVEX encoded version) when src operand is a register

(KL, VL) = (2, 128), (4, 256), (8, 512)
IF (VL = 512) AND (EVEX.b = 1) 
    THEN
        SET_RM(EVEX.RC);
    ELSE 
        SET_RM(MXCSR.RM);
FI;
FOR j ← 0 TO KL-1
    i ← j * 32
    k ← j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i] ←
            Convert_UQuadInteger_To_Single_Precision_Floating_Point(SRC[k+63:k])
        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/2] ← 0

VCVTUQQ2PS (EVEX encoded version) when src operand is a memory source

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j ← 0 TO KL-1
    i ← j * 32
    k ← j * 64
    IF k1[j] OR *no writemask*
        THEN 
            IF (EVEX.b = 1) 
                THEN
                    DEST[i+31:i] ←
            Convert_UQuadInteger_To_Single_Precision_Floating_Point(SRC[63:0])
                ELSE 
                    DEST[i+31:i] ←
            Convert_UQuadInteger_To_Single_Precision_Floating_Point(SRC[k+63:k])
            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/2] ← 0

Intel C/C++ Compiler Intrinsic Equivalent

VCVTUQQ2PS __m256 _mm512_cvtepu64_ps( __m512i a);
VCVTUQQ2PS __m256 _mm512_mask_cvtepu64_ps( __m256 s, __mmask8 k, __m512i a);
VCVTUQQ2PS __m256 _mm512_maskz_cvtepu64_ps( __mmask8 k, __m512i a);
VCVTUQQ2PS __m256 _mm512_cvt_roundepu64_ps( __m512i a, int r);
VCVTUQQ2PS __m256 _mm512_mask_cvt_roundepu64_ps( __m256 s, __mmask8 k, __m512i a, int r);
VCVTUQQ2PS __m256 _mm512_maskz_cvt_roundepu64_ps( __mmask8 k, __m512i a, int r);
VCVTUQQ2PS __m128 _mm256_cvtepu64_ps( __m256i a);
VCVTUQQ2PS __m128 _mm256_mask_cvtepu64_ps( __m128 s, __mmask8 k, __m256i a);
VCVTUQQ2PS __m128 _mm256_maskz_cvtepu64_ps( __mmask8 k, __m256i a);
VCVTUQQ2PS __m128 _mm_cvtepu64_ps( __m128i a);
VCVTUQQ2PS __m128 _mm_mask_cvtepu64_ps( __m128 s, __mmask8 k, __m128i a);
VCVTUQQ2PS __m128 _mm_maskz_cvtepu64_ps( __mmask8 k, __m128i a);

SIMD Floating-Point Exceptions

Precision

Other Exceptions

EVEX-encoded instructions, see Exceptions Type E2.

#UD If EVEX.vvvv != 1111B.

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Source: Intel® Architecture Software Developer's Manual (May 2018)
Generated: 5-6-2018