VCVTQQ2PS

VCVTQQ2PS — Convert Packed Quadword Integers to Packed Single-Precision Floating-Point Values

Opcode/ Instruction	Op / En	64/32 bit Mode Support	CPUID Feature Flag	Description
EVEX.128.0F.W1 5B /r VCVTQQ2PS xmm1 {k1}{z}, xmm2/m128/m64bcst	A	V/V	AVX512VL AVX512DQ	Convert two packed quadword integers from xmm2/mem to packed single-precision floating-point values in xmm1 with writemask k1.
EVEX.256.0F.W1 5B /r VCVTQQ2PS xmm1 {k1}{z}, ymm2/m256/m64bcst	A	V/V	AVX512VL AVX512DQ	Convert four packed quadword integers from ymm2/mem to packed single-precision floating-point values in xmm1 with writemask k1.
EVEX.512.0F.W1 5B /r VCVTQQ2PS ymm1 {k1}{z}, zmm2/m512/m64bcst{er}	A	V/V	AVX512DQ	Convert eight packed quadword integers from zmm2/mem to eight packed single-precision floating-point values in ymm1 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 quadword integers in the source operand (second operand) to packed single-precision floating- point values in the destination operand (first operand).

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

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

Operation

VCVTQQ2PS (EVEX encoded versions) when src operand is a register

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j ← 0 TO KL-1
    i ← j * 64
    k ← j * 32
    IF k1[j] OR *no writemask*
        THEN DEST[k+31:k] ←
            Convert_QuadInteger_To_Single_Precision_Floating_Point(SRC[i+63:i])
        ELSE 
            IF *merging-masking*
                            ; merging-masking
                THEN *DEST[k+31:k] remains unchanged*
                ELSE 
                            ; zeroing-masking
                    DEST[k+31:k] ← 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:VL/2] ← 0

VCVTQQ2PS (EVEX encoded versions) when src operand is a memory source

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j ← 0 TO KL-1
    i ← j * 64
    k ← j * 32
    IF k1[j] OR *no writemask*
        THEN 
            IF (EVEX.b == 1) 
                THEN
                    DEST[k+31:k] ←
            Convert_QuadInteger_To_Single_Precision_Floating_Point(SRC[63:0])
                ELSE 
                    DEST[k+31:k] ←
            Convert_QuadInteger_To_Single_Precision_Floating_Point(SRC[i+63:i])
            FI;
        ELSE 
            IF *merging-masking*
                            ; merging-masking
                THEN *DEST[k+31:k] remains unchanged*
                ELSE 
                            ; zeroing-masking
                    DEST[k+31:k] ← 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:VL/2] ← 0

Intel C/C++ Compiler Intrinsic Equivalent

VCVTQQ2PS __m256 _mm512_cvtepi64_ps( __m512i a);
VCVTQQ2PS __m256 _mm512_mask_cvtepi64_ps( __m256 s, __mmask16 k, __m512i a);
VCVTQQ2PS __m256 _mm512_maskz_cvtepi64_ps( __mmask16 k, __m512i a);
VCVTQQ2PS __m256 _mm512_cvt_roundepi64_ps( __m512i a, int r);
VCVTQQ2PS __m256 _mm512_mask_cvt_roundepi_ps( __m256 s, __mmask8 k, __m512i a, int r);
VCVTQQ2PS __m256 _mm512_maskz_cvt_roundepi64_ps( __mmask8 k, __m512i a, int r);
VCVTQQ2PS __m128 _mm256_cvtepi64_ps( __m256i a);
VCVTQQ2PS __m128 _mm256_mask_cvtepi64_ps( __m128 s, __mmask8 k, __m256i a);
VCVTQQ2PS __m128 _mm256_maskz_cvtepi64_ps( __mmask8 k, __m256i a);
VCVTQQ2PS __m128 _mm_cvtepi64_ps( __m128i a);
VCVTQQ2PS __m128 _mm_mask_cvtepi64_ps( __m128 s, __mmask8 k, __m128i a);
VCVTQQ2PS __m128 _mm_maskz_cvtepi64_ps( __mmask8 k, __m128i a);

SIMD Floating-Point Exceptions

Precision

Other Exceptions

EVEX-encoded instructions, see Exceptions Type E2

#UD If EVEX.vvvv != 1111B.

---

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