## 12.4 ARMv6 SIMD instruction intrinsics and APSR GE flags

The following table describes the action and operation of the APSR.GE flags for each ARMv6 SIMD instruction intrinsic.

Table 12-4 ARMv6 SIMD instruction intrinsics and APSR GE flags

Intrinsic APSR.GE flag action APSR.GE operation
`__sel` Reads GE flags

```if APSR.GE[0] == 1 then res[7:0] = val1[7:0] else val2[7:0]```

```if APSR.GE[1] == 1 then res[15:8] = val1[15:8] else val2[15:8]```

```if APSR.GE[2] == 1 then res[23:16] = val1[23:16] else val2[23:16]```

```if APSR.GE[3] == 1 then res[31:24] = val1[31:24] else val2[31:24]```

`__sadd16` Sets or clears GE flags

```if sum1 ≥ 0 then APSR.GE[1:0] = 11 else 00```

```if sum2 ≥ 0 then APSR.GE[3:2] = 11 else 00```

`__sadd8` Sets or clears GE flags

```if sum1 ≥ 0 then APSR.GE[0] = 1 else 0```

```if sum2 ≥ 0 then APSR.GE[1] = 1 else 0```

```if sum3 ≥ 0 then APSR.GE[2] = 1 else 0```

```if sum4 ≥ 0 then APSR.GE[3] = 1 else 0```

`__sasx` Sets or clears GE flags

```if diff ≥ 0 then APSR.GE[1:0] = 11 else 00```

```if sum ≥ 0 then APSR.GE[3:2] = 11 else 00```

`__ssax` Sets or clears GE flags

```if sum ≥ 0 then APSR.GE[1:0] = 11 else 00```

```if diff ≥ 0 then APSR.GE[3:2] = 11 else 00```

`__ssub16` Sets or clears GE flags

```if diff1 ≥ 0 then APSR.GE[1:0] = 11 else 00```

```if diff2 ≥ 0 then APSR.GE[3:2] = 11 else 00```

`__ssub8` Sets or clears GE flags

```if diff1 ≥ 0 then APSR.GE[0] = 1 else 0```

```if diff2 ≥ 0 then APSR.GE[1] = 1 else 0```

```if diff3 ≥ 0 then APSR.GE[2] = 1 else 0```

```if diff4 ≥ 0 then APSR.GE[3] = 1 else 0```

`__uadd16` Sets or clears GE flags

```if sum1 ≥ 0x10000 then APSR.GE[1:0] = 11 else 00```

```if sum2 ≥ 0x10000 then APSR.GE[3:2] = 11 else 00```

`__uadd8` Sets or clears GE flags

```if sum1 ≥ 0x100 then APSR.GE[0] = 1 else 0```

```if sum2 ≥ 0x100 then APSR.GE[1] = 1 else 0```

```if sum3 ≥ 0x100 then APSR.GE[2] = 1 else 0```

```if sum4 ≥ 0x100 then APSR.GE[3] = 1 else 0```

`__uasx` Sets or clears GE flags

```if diff ≥ 0 then APSR.GE[1:0] = 11 else 00```

```if sum ≥ 0x10000 then APSR.GE[3:2] = 11 else 00```

`__usax` Sets or clears GE flags

```if sum ≥ 0x10000 then APSR.GE[1:0] = 11 else 00```

```if diff ≥ 0 then APSR.GE[3:2] = 11 else 00```

`__usub16` Sets or clears GE flags

```if diff1 ≥ 0 then APSR.GE[1:0] = 11 else 00```

```if diff2 ≥ 0 then APSR.GE[3:2] = 11 else 00```

`__usub8` Sets or clears GE flags

```if diff1 ≥ 0 then APSR.GE[0] = 1 else 0```

```if diff2 ≥ 0 then APSR.GE[1] = 1 else 0```

```if diff3 ≥ 0 then APSR.GE[2] = 1 else 0```

```if diff4 ≥ 0 then APSR.GE[3] = 1 else 0```