_mm_macclo_epi32

Artigo
07/22/2011

[Note: This document describes a pre-release version of Visual Studio 2010 SP1 and may be revised in any later version.]

Visual Studio 2010 SP1 is required.

Microsoft Specific

Generates the XOP instruction vpmacsdql to perform an integer multiply-add of its sources.

__m128i _mm_macclo_epi32 (
   __m128i src1,
   __m128i src2,
   __m128i src3
);

Parameters

[in] src1
A 128-bit parameter that contains two 32-bit signed integers in its even-indexed doublewords.
[in] src2
A 128-bit parameter that contains two 32-bit signed integers in its even-indexed doublewords.
[in] src3
A 128-bit parameter that contains two 64-bit signed integers.

Return value

A 128-bit result r that contains two 64-bit signed integers.

r[0] := src1[0] * src2[0] + src3[0];
r[1] := src1[2] * src2[2] + src3[1];

Requirements

Intrinsic	Architecture
_mm_macclo_epi32	XOP

Header file <intrin.h>

Remarks

Each even-indexed 32-bit signed integer value in src1 is each multiplied by the corresponding 32-bit signed integer value in src2, each 64-bit signed integer product is added to the corresponding 64-bit signed integer value in src3, and the signed 64-bit integer result is stored as the corresponding value in the destination. The odd-indexed doublewords in src1 and src2 are ignored.

Overflow is ignored.

The vpmacsdql instruction is part of the XOP family of instructions. Before you use this intrinsic, you must ensure that the processor supports this instruction. To determine hardware support for this instruction, call the __cpuid intrinsic with InfoType = 0x80000001 and check bit 11 of CPUInfo[2] (ECX). This bit is 1 when the instruction is supported, and 0 otherwise.

Example

#include <stdio.h>
#include <intrin.h>
int main()
{
    __m128i a, b, c, d;
    int i;
    a.m128i_i32[0] = 2000000000;
    a.m128i_i32[2] = 2000000000;
    b.m128i_i32[0] = -2000000000;
    b.m128i_i32[2] = 2000000000;
    c.m128i_i64[0] = 9000000000000000000ll;
    c.m128i_i64[1] = 9000000000000000000ll;
    d = _mm_macclo_epi32(a, b, c);
    for (i = 0; i < 2; i++)
        printf_s(" %20I64d (0x%I64x)\n",
            d.m128i_i64[i], d.m128i_i64[i]);
 }

5000000000000000000 (0x4563918244f40000)
-5446744073709551616 (0xb469471f80140000)

Change History

Date	History	Reason
March 2011	Added this content.	SP1 feature change.

March 2011

Added this content.

SP1 feature change.

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