ARM Compiler toolchain Compiler Reference: ARMv6 SIMD instruction intrinsics and APSR GE flags

ARMv6 SIMD instruction intrinsics and APSR GE flags

Table 36. 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`

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