CVTTPS2DQ — Convert with Truncation Packed Single-Precision Floating-Point Values to Packed Signed Doubleword Integer Values

Instruction Operand Encoding ¶

Description ¶

Converts four, eight or sixteen packed single-precision floating-point values in the source operand to four, eight or sixteen signed doubleword integers in the destination operand.

When a conversion is inexact, a truncated (round toward zero) value is returned. If a converted result is larger than the maximum signed doubleword integer, the floating-point invalid exception is raised, and if this exception is masked, the indefinite integer value (80000000H) is returned.

EVEX encoded versions: 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.

VEX.256 encoded version: The source operand is a YMM register or 256- bit memory location. The destination operand is a YMM register. The upper bits (MAXVL-1:256) of the corresponding ZMM register destination are zeroed.

VEX.128 encoded version: The source operand is an XMM register or 128- bit memory location. The destination operand is a XMM register. The upper bits (MAXVL-1:128) of the corresponding ZMM register destination are zeroed.

128-bit Legacy SSE version: The source operand is an XMM register or 128- bit memory location. The destination operand is an XMM register. The upper bits (MAXVL-1:128) of the corresponding ZMM register destination are unmodified.

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

Operation ¶

VCVTTPS2DQ (EVEX encoded versions) when src operand is a register ¶

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

VCVTTPS2DQ (EVEX encoded versions) when src operand is a memory source ¶

(KL, VL) = (4, 128), (8, 256), (16, 512)
FOR j←0 TO 15
    i←j * 32
    IF k1[j] OR *no writemask*
        THEN
            IF (EVEX.b = 1)
                THEN
                    DEST[i+31:i] ←
            Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[31:0])
                ELSE
                    DEST[i+31:i] ←
            Convert_Single_Precision_Floating_Point_To_Integer_Truncate(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

VCVTTPS2DQ (VEX.256 encoded version) ¶

DEST[31:0] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[31:0])
DEST[63:32] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[63:32])
DEST[95:64] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[95:64])
DEST[127:96] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[127:96)
DEST[159:128] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[159:128])
DEST[191:160] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[191:160])
DEST[223:192] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[223:192])
DEST[255:224] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[255:224])

VCVTTPS2DQ (VEX.128 encoded version) ¶

DEST[31:0] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[31:0])
DEST[63:32] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[63:32])
DEST[95:64] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[95:64])
DEST[127:96] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[127:96])
DEST[MAXVL-1:128] ←0

CVTTPS2DQ (128-bit Legacy SSE version) ¶

DEST[31:0] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[31:0])
DEST[63:32] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[63:32])
DEST[95:64] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[95:64])
DEST[127:96] ←Convert_Single_Precision_Floating_Point_To_Integer_Truncate(SRC[127:96])
DEST[MAXVL-1:128] (unmodified)

Intel C/C++ Compiler Intrinsic Equivalent ¶

VCVTTPS2DQ __m512i _mm512_cvttps_epi32( __m512 a);

VCVTTPS2DQ __m512i _mm512_mask_cvttps_epi32( __m512i s, __mmask16 k, __m512 a);

VCVTTPS2DQ __m512i _mm512_maskz_cvttps_epi32( __mmask16 k, __m512 a);

VCVTTPS2DQ __m512i _mm512_cvtt_roundps_epi32( __m512 a, int sae);

VCVTTPS2DQ __m512i _mm512_mask_cvtt_roundps_epi32( __m512i s, __mmask16 k, __m512 a, int sae);

VCVTTPS2DQ __m512i _mm512_maskz_cvtt_roundps_epi32( __mmask16 k, __m512 a, int sae);

VCVTTPS2DQ __m256i _mm256_mask_cvttps_epi32( __m256i s, __mmask8 k, __m256 a);

VCVTTPS2DQ __m256i _mm256_maskz_cvttps_epi32( __mmask8 k, __m256 a);

VCVTTPS2DQ __m128i _mm_mask_cvttps_epi32( __m128i s, __mmask8 k, __m128 a);

VCVTTPS2DQ __m128i _mm_maskz_cvttps_epi32( __mmask8 k, __m128 a);

VCVTTPS2DQ __m256i _mm256_cvttps_epi32 (__m256 a)

CVTTPS2DQ __m128i _mm_cvttps_epi32 (__m128 a)

SIMD Floating-Point Exceptions ¶

Invalid, Precision

Other Exceptions ¶

VEX-encoded instructions, see Exceptions Type 2; additionally

EVEX-encoded instructions, see Exceptions Type E2.