VCVTUDQ2PS — Convert Packed Unsigned Doubleword 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.W0 7A /r VCVTUDQ2PS xmm1 {k1}{z}, xmm2/m128/m32bcst	A	V/V	AVX512VL AVX512F	Convert four packed unsigned doubleword integers from xmm2/m128/m32bcst to packed single-precision floating-point values in xmm1 with writemask k1.
EVEX.256.F2.0F.W0 7A /r VCVTUDQ2PS ymm1 {k1}{z}, ymm2/m256/m32bcst	A	V/V	AVX512VL AVX512F	Convert eight packed unsigned doubleword integers from ymm2/m256/m32bcst to packed single-precision floating-point values in zmm1 with writemask k1.
EVEX.512.F2.0F.W0 7A /r VCVTUDQ2PS zmm1 {k1}{z}, zmm2/m512/m32bcst{er}	A	V/V	AVX512F	Convert sixteen packed unsigned doubleword integers from zmm2/m512/m32bcst to sixteen 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 doubleword integers in the source operand (second operand) to single-precision floating-point values in the destination operand (first operand).

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 conditionally updated with writemask k1.

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

Operation ¶

VCVTUDQ2PS (EVEX encoded version) when src operand is a register ¶

(KL, VL) = (4, 128), (8, 256), (16, 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
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i]←
            Convert_UInteger_To_Single_Precision_Floating_Point(SRC[i+31:i])
        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

VCVTUDQ2PS (EVEX encoded version) when src operand is a memory source ¶

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j←0 TO KL-1
    i←j * 32
    IF k1[j] OR *no writemask*
        THEN
            IF (EVEX.b = 1)
                THEN
                    DEST[i+31:i] ←
            Convert_UInteger_To_Single_Precision_Floating_Point(SRC[31:0])
                ELSE
                    DEST[i+31:i] ←
            Convert_UInteger_To_Single_Precision_Floating_Point(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

Intel C/C++ Compiler Intrinsic Equivalent ¶

VCVTUDQ2PS __m512 _mm512_cvtepu32_ps( __m512i a);

VCVTUDQ2PS __m512 _mm512_mask_cvtepu32_ps( __m512 s, __mmask16 k, __m512i a);

VCVTUDQ2PS __m512 _mm512_maskz_cvtepu32_ps( __mmask16 k, __m512i a);

VCVTUDQ2PS __m512 _mm512_cvt_roundepu32_ps( __m512i a, int r);

VCVTUDQ2PS __m512 _mm512_mask_cvt_roundepu32_ps( __m512 s, __mmask16 k, __m512i a, int r);

VCVTUDQ2PS __m512 _mm512_maskz_cvt_roundepu32_ps( __mmask16 k, __m512i a, int r);

VCVTUDQ2PS __m256 _mm256_cvtepu32_ps( __m256i a);

VCVTUDQ2PS __m256 _mm256_mask_cvtepu32_ps( __m256 s, __mmask8 k, __m256i a);

VCVTUDQ2PS __m256 _mm256_maskz_cvtepu32_ps( __mmask8 k, __m256i a);

VCVTUDQ2PS __m128 _mm_cvtepu32_ps( __m128i a);

VCVTUDQ2PS __m128 _mm_mask_cvtepu32_ps( __m128 s, __mmask8 k, __m128i a);

VCVTUDQ2PS __m128 _mm_maskz_cvtepu32_ps( __mmask8 k, __m128i a);

SIMD Floating-Point Exceptions ¶

Precision

Other Exceptions ¶

EVEX-encoded instructions, see Exceptions Type E2.

#UD	If EVEX.vvvv != 1111B.