test_sra_i32_4()

bool autoresearch::simd_check::test_sra_i32_4 ( )

inline

Definition at line 451 of file AutoResearchSimd.h.

                             {
    // Arithmetic shift preserves sign bit
    uint32_t input[4] = {as_u32(-16), as_u32(16), 0x80000000, 0x7FFFFFFF};
    uint32_t output[4] = {0};
    store_u32_4(output, sra_i32_4(load_u32_4(input), 2));
    if (as_i32(output[0]) != -4) return false;   // -16 >> 2 = -4 (sign-extended)
    if (as_i32(output[1]) != 4) return false;     // 16 >> 2 = 4
    if (as_i32(output[2]) != as_i32(0xE0000000)) return false;  // 0x80000000 >> 2 sign-extended
    if (as_i32(output[3]) != as_i32(0x1FFFFFFF)) return false;  // 0x7FFFFFFF >> 2
    return true;
}

References as_i32(), and as_u32().

Referenced by getTests().

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