1
Download RealView Compilation Tools Compiler Reference Guide
Transcript
Compiler-specific Features 4.7.48 ARMv6 SIMD instruction intrinsics and APSR GE flags Table 4-18 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 4-118 Copyright © 2007-2010 ARM. All rights reserved. Non-Confidential, ARM DUI 0348C ID101213
