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Source code

VCVTTPS2UQQ

Convert With Truncation Packed Single Precision Floating-Point Values to

stableVMJITAOTinstruction

Encodings

OpcodeInstructionOp/En64-bitCompat/LegacyDescription
EVEX.128.66.0F.W0 78 /rVCVTTPS2UQQ xmm1 {k1}{z}, xmm2/m64/m32bcstAValidValidConvert two packed single precision floating-point AVX512DQ) OR values from xmm2/m64/m32bcst to two packed AVX10.1 unsigned quadword values in xmm1 using truncation subject to writemask k1.
EVEX.256.66.0F.W0 78 /rVCVTTPS2UQQ ymm1 {k1}{z}, xmm2/m128/m32bcstAValidValidConvert four packed single precision floating-point AVX512DQ) OR values from xmm2/m128/m32bcst to four packed AVX10.1 unsigned quadword values in ymm1 using truncation subject to writemask k1.
EVEX.512.66.0F.W0 78 /rVCVTTPS2UQQ zmm1 {k1}{z}, ymm2/m256/m32bcst {sae}AValidValidConvert eight packed single precision floating-point OR AVX10.1 values from ymm2/m256/m32bcst to eight packed unsigned quadword values in zmm1 using truncation 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

Tupla: Half

Measured cost

Loading measurements from arch-data...

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 FFFFFFFF_FFFFFFFFH is returned.

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 intrinsics

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 2-48, "Type E2 Class Exception Conditions."

Additionally:

#UD                     If EVEX.vvvv != 1111B.

Sources