VCVTTPS2UQQ — Convert With Truncation Packed Single Precision Floating-Point Values toPacked Unsigned Quadword Integer Values

Opcode/Instruction	Op/En	64/32 Bit Mode Support	CPUID Feature Flag	Description
EVEX.128.66.0F.W0 78 /r VCVTTPS2UQQ xmm1 {k1}{z}, xmm2/m64/m32bcst	A	V/V	AVX512VL AVX512DQ	Convert two packed single precision floating-point values from xmm2/m64/m32bcst to two packed unsigned quadword values in xmm1 using truncation subject to writemask k1.
EVEX.256.66.0F.W0 78 /r VCVTTPS2UQQ ymm1 {k1}{z}, xmm2/m128/m32bcst	A	V/V	AVX512VL AVX512DQ	Convert four packed single precision floating-point values from xmm2/m128/m32bcst to four packed unsigned quadword values in ymm1 using truncation subject to writemask k1.
EVEX.512.66.0F.W0 78 /r VCVTTPS2UQQ zmm1 {k1}{z}, ymm2/m256/m32bcst{sae}	A	V/V	AVX512DQ	Convert eight packed single precision floating-point values from ymm2/m256/m32bcst to eight packed unsigned quadword values in zmm1 using truncation subject to writemask k1.

Instruction Operand Encoding ¶

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

Description ¶

Converts with truncation up to eight packed single precision floating-point values in the source operand to unsigned quadword integers in the destination operand.

When a conversion is inexact, a truncated (round toward zero) value is returned. If a converted result cannot be represented in the destination format, the floating-point invalid exception is raised, and if this exception is masked, the integer value 2^w – 1 is returned, where w represents the number of bits in the destination format.

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

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

Operation ¶

VCVTTPS2UQQ (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[i+63:i] :=
            Convert_Single_Precision_To_UQuadInteger_Truncate(SRC[k+31:k])
        ELSE
            IF *merging-masking* ; merging-masking
                THEN *DEST[i+63:i] remains unchanged*
                ELSE ; zeroing-masking
                    DEST[i+63:i] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:VL] := 0

VCVTTPS2UQQ (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[i+63:i] :=
            Convert_Single_Precision_To_UQuadInteger_Truncate(SRC[31:0])
                ELSE
                    DEST[i+63:i] :=
            Convert_Single_Precision_To_UQuadInteger_Truncate(SRC[k+31:k])
            FI;
        ELSE
            IF *merging-masking* ; merging-masking
                THEN *DEST[i+63:i] remains unchanged*
                ELSE ; zeroing-masking
                    DEST[i+63:i] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:VL] := 0

Intel C/C++ Compiler Intrinsic Equivalent ¶

VCVTTPS2UQQ _mm<size>[_mask[z]]_cvtt[_round]ps_epu64 VCVTTPS2UQQ __m512i _mm512_cvttps_epu64( __m256 a);

VCVTTPS2UQQ __m512i _mm512_mask_cvttps_epu64( __m512i s, __mmask16 k, __m256 a);

VCVTTPS2UQQ __m512i _mm512_maskz_cvttps_epu64( __mmask16 k, __m256 a);

VCVTTPS2UQQ __m512i _mm512_cvtt_roundps_epu64( __m256 a, int sae);

VCVTTPS2UQQ __m512i _mm512_mask_cvtt_roundps_epu64( __m512i s, __mmask16 k, __m256 a, int sae);

VCVTTPS2UQQ __m512i _mm512_maskz_cvtt_roundps_epu64( __mmask16 k, __m256 a, int sae);

VCVTTPS2UQQ __m256i _mm256_mask_cvttps_epu64( __m256i s, __mmask8 k, __m128 a);

VCVTTPS2UQQ __m256i _mm256_maskz_cvttps_epu64( __mmask8 k, __m128 a);

VCVTTPS2UQQ __m128i _mm_mask_cvttps_epu64( __m128i s, __mmask8 k, __m128 a);

VCVTTPS2UQQ __m128i _mm_maskz_cvttps_epu64( __mmask8 k, __m128 a);

SIMD Floating-Point Exceptions ¶

Invalid, Precision.

Other Exceptions ¶

EVEX-encoded instructions, see Table 2-47, “Type E3 Class Exception Conditions.”

Additionally:

#UD	If EVEX.vvvv != 1111B.