cmd/compile: optimize ARM with more efficient MOVB/MOVBU/MOVH/MOVHU

Like the indexed MOVW (MOVWloadidx/MOVWstoreidx) used in current ARM backend, the indexed MOVB/MOVBU/MOVH/MOVHU can also be used to generate further optimized ARM code. My patch implements this optimization. Here are some contrast test results against the original go compiler. 1. The total size of all .a files in pkg/ shrinks by 0.03%. 2. The compilecmp benchmark shows a little decline. name old time/op new time/op delta Template 2.35s ± 1% 2.37s ± 3% +0.94% (p=0.006 n=19+19) Unicode 1.33s ± 3% 1.33s ± 2% ~ (p=0.158 n=20+18) GoTypes 7.86s ± 2% 7.84s ± 1% ~ (p=0.284 n=19+18) Compiler 37.5s ± 1% 37.7s ± 2% ~ (p=0.101 n=20+19) SSA 83.4s ± 2% 83.6s ± 2% ~ (p=0.231 n=20+20) Flate 1.46s ± 2% 1.45s ± 1% ~ (p=0.097 n=20+17) GoParser 1.86s ± 2% 1.86s ± 4% ~ (p=0.738 n=20+20) Reflect 5.10s ± 1% 5.11s ± 1% ~ (p=0.290 n=20+18) Tar 1.78s ± 2% 1.77s ± 2% ~ (p=0.166 n=19+20) XML 2.61s ± 2% 2.61s ± 2% ~ (p=0.665 n=19+19) [Geo mean] 4.67s 4.68s +0.16% name old user-time/op new user-time/op delta Template 2.79s ± 3% 2.80s ± 2% ~ (p=0.662 n=20+20) Unicode 1.62s ± 3% 1.64s ± 4% ~ (p=0.252 n=20+20) GoTypes 9.58s ± 2% 9.62s ± 2% ~ (p=0.250 n=20+20) Compiler 46.2s ± 1% 46.2s ± 1% ~ (p=0.602 n=20+19) SSA 108s ± 1% 108s ± 2% ~ (p=0.242 n=18+20) Flate 1.69s ± 3% 1.69s ± 4% ~ (p=0.470 n=20+20) GoParser 2.16s ± 3% 2.20s ± 4% +1.70% (p=0.005 n=19+20) Reflect 6.02s ± 2% 6.02s ± 2% ~ (p=0.700 n=20+17) Tar 2.11s ± 2% 2.11s ± 3% ~ (p=0.480 n=18+20) XML 3.07s ± 2% 3.11s ± 4% +1.50% (p=0.043 n=20+20) [Geo mean] 5.61s 5.64s +0.55% name old text-bytes new text-bytes delta HelloSize 586kB ± 0% 586kB ± 0% ~ (all equal) name old data-bytes new data-bytes delta HelloSize 5.46kB ± 0% 5.46kB ± 0% ~ (all equal) name old bss-bytes new bss-bytes delta HelloSize 72.9kB ± 0% 72.9kB ± 0% ~ (all equal) name old exe-bytes new exe-bytes delta HelloSize 1.03MB ± 0% 1.03MB ± 0% ~ (all equal) 3. The go1 benchmark shows improvement totally, and even more than 10% improvement in the test case Revcomp. name old time/op new time/op delta BinaryTree17-4 42.0s ± 1% 41.5s ± 1% -1.32% (p=0.000 n=39+40) Fannkuch11-4 24.1s ± 1% 23.6s ± 0% -2.38% (p=0.000 n=40+40) FmtFprintfEmpty-4 843ns ± 0% 839ns ± 1% -0.46% (p=0.000 n=33+40) FmtFprintfString-4 1.44µs ± 1% 1.37µs ± 1% -5.48% (p=0.000 n=40+35) FmtFprintfInt-4 1.44µs ± 1% 1.41µs ± 2% -1.50% (p=0.000 n=40+40) FmtFprintfIntInt-4 2.07µs ± 1% 2.06µs ± 0% -0.78% (p=0.000 n=40+40) FmtFprintfPrefixedInt-4 2.50µs ± 1% 2.33µs ± 1% -6.85% (p=0.000 n=40+40) FmtFprintfFloat-4 4.36µs ± 1% 4.34µs ± 0% -0.39% (p=0.017 n=40+40) FmtManyArgs-4 8.11µs ± 0% 8.00µs ± 0% -1.37% (p=0.000 n=40+40) GobDecode-4 105ms ± 2% 103ms ± 2% -2.17% (p=0.000 n=39+39) GobEncode-4 90.1ms ± 2% 88.6ms ± 1% -1.67% (p=0.000 n=40+39) Gzip-4 4.18s ± 1% 4.09s ± 1% -2.03% (p=0.000 n=40+40) Gunzip-4 608ms ± 1% 603ms ± 1% -0.86% (p=0.000 n=40+34) HTTPClientServer-4 674µs ± 3% 661µs ± 2% -1.82% (p=0.000 n=40+39) JSONEncode-4 256ms ± 1% 243ms ± 0% -5.11% (p=0.000 n=39+31) JSONDecode-4 915ms ± 1% 904ms ± 1% -1.18% (p=0.000 n=40+36) Mandelbrot200-4 49.2ms ± 0% 49.3ms ± 0% ~ (p=0.254 n=34+40) GoParse-4 46.9ms ± 2% 46.9ms ± 1% ~ (p=0.737 n=40+39) RegexpMatchEasy0_32-4 1.28µs ± 1% 1.27µs ± 1% -0.71% (p=0.000 n=40+40) RegexpMatchEasy0_1K-4 7.86µs ± 4% 7.67µs ± 4% -2.46% (p=0.000 n=38+40) RegexpMatchEasy1_32-4 1.28µs ± 1% 1.28µs ± 1% -0.54% (p=0.000 n=40+40) RegexpMatchEasy1_1K-4 10.4µs ± 2% 10.3µs ± 2% -0.88% (p=0.003 n=40+39) RegexpMatchMedium_32-4 2.05µs ± 0% 2.04µs ± 0% -0.34% (p=0.000 n=40+33) RegexpMatchMedium_1K-4 541µs ± 1% 535µs ± 1% -1.02% (p=0.000 n=40+38) RegexpMatchHard_32-4 29.3µs ± 1% 29.1µs ± 1% -0.51% (p=0.000 n=40+40) RegexpMatchHard_1K-4 881µs ± 1% 871µs ± 1% -1.15% (p=0.000 n=40+40) Revcomp-4 81.7ms ± 2% 67.5ms ± 2% -17.37% (p=0.000 n=39+39) Template-4 1.05s ± 1% 1.08s ± 2% +3.67% (p=0.000 n=40+40) TimeParse-4 7.24µs ± 1% 7.09µs ± 1% -2.13% (p=0.000 n=40+40) TimeFormat-4 13.2µs ± 1% 13.1µs ± 0% -0.31% (p=0.007 n=40+31) [Geo mean] 733µs 718µs -2.03% name old speed new speed delta GobDecode-4 7.28MB/s ± 2% 7.44MB/s ± 2% +2.23% (p=0.000 n=39+39) GobEncode-4 8.52MB/s ± 2% 8.67MB/s ± 1% +1.70% (p=0.000 n=40+39) Gzip-4 4.65MB/s ± 1% 4.74MB/s ± 1% +1.94% (p=0.000 n=37+40) Gunzip-4 31.9MB/s ± 1% 32.2MB/s ± 1% +0.90% (p=0.000 n=40+36) JSONEncode-4 7.57MB/s ± 1% 7.98MB/s ± 0% +5.41% (p=0.000 n=40+31) JSONDecode-4 2.12MB/s ± 1% 2.15MB/s ± 1% +1.23% (p=0.000 n=40+40) GoParse-4 1.23MB/s ± 1% 1.23MB/s ± 1% ~ (p=0.769 n=39+40) RegexpMatchEasy0_32-4 25.0MB/s ± 1% 25.2MB/s ± 1% +0.71% (p=0.000 n=40+40) RegexpMatchEasy0_1K-4 130MB/s ± 5% 134MB/s ± 4% +2.53% (p=0.000 n=38+40) RegexpMatchEasy1_32-4 24.9MB/s ± 1% 25.1MB/s ± 1% +0.55% (p=0.000 n=40+40) RegexpMatchEasy1_1K-4 98.5MB/s ± 2% 99.4MB/s ± 2% +0.88% (p=0.003 n=40+39) RegexpMatchMedium_32-4 490kB/s ± 0% 490kB/s ± 0% ~ (all equal) RegexpMatchMedium_1K-4 1.89MB/s ± 1% 1.91MB/s ± 1% +1.02% (p=0.000 n=40+38) RegexpMatchHard_32-4 1.10MB/s ± 1% 1.10MB/s ± 0% +0.41% (p=0.000 n=40+33) RegexpMatchHard_1K-4 1.16MB/s ± 1% 1.17MB/s ± 1% +1.21% (p=0.000 n=40+40) Revcomp-4 31.1MB/s ± 2% 37.6MB/s ± 2% +21.03% (p=0.000 n=39+39) Template-4 1.86MB/s ± 1% 1.79MB/s ± 1% -3.51% (p=0.000 n=40+38) [Geo mean] 6.66MB/s 6.80MB/s +2.13% fixes #21492 Change-Id: Ia26e7ca393f0a5f31de240e8ff9a220453ca7e0d Reviewed-on: https://go-review.googlesource.com/58450Reviewed-by: Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>

cmd/compile: optimize ARM with more efficient MOVB/MOVBU/MOVH/MOVHU
Like the indexed MOVW (MOVWloadidx/MOVWstoreidx) used in current ARM backend, the indexed MOVB/MOVBU/MOVH/MOVHU can also be used to generate further optimized ARM code. My patch implements this optimization. Here are some contrast test results against the original go compiler. 1. The total size of all .a files in pkg/ shrinks by 0.03%. 2. The compilecmp benchmark shows a little decline. name old time/op new time/op delta Template 2.35s ± 1% 2.37s ± 3% +0.94% (p=0.006 n=19+19) Unicode 1.33s ± 3% 1.33s ± 2% ~ (p=0.158 n=20+18) GoTypes 7.86s ± 2% 7.84s ± 1% ~ (p=0.284 n=19+18) Compiler 37.5s ± 1% 37.7s ± 2% ~ (p=0.101 n=20+19) SSA 83.4s ± 2% 83.6s ± 2% ~ (p=0.231 n=20+20) Flate 1.46s ± 2% 1.45s ± 1% ~ (p=0.097 n=20+17) GoParser 1.86s ± 2% 1.86s ± 4% ~ (p=0.738 n=20+20) Reflect 5.10s ± 1% 5.11s ± 1% ~ (p=0.290 n=20+18) Tar 1.78s ± 2% 1.77s ± 2% ~ (p=0.166 n=19+20) XML 2.61s ± 2% 2.61s ± 2% ~ (p=0.665 n=19+19) [Geo mean] 4.67s 4.68s +0.16% name old user-time/op new user-time/op delta Template 2.79s ± 3% 2.80s ± 2% ~ (p=0.662 n=20+20) Unicode 1.62s ± 3% 1.64s ± 4% ~ (p=0.252 n=20+20) GoTypes 9.58s ± 2% 9.62s ± 2% ~ (p=0.250 n=20+20) Compiler 46.2s ± 1% 46.2s ± 1% ~ (p=0.602 n=20+19) SSA 108s ± 1% 108s ± 2% ~ (p=0.242 n=18+20) Flate 1.69s ± 3% 1.69s ± 4% ~ (p=0.470 n=20+20) GoParser 2.16s ± 3% 2.20s ± 4% +1.70% (p=0.005 n=19+20) Reflect 6.02s ± 2% 6.02s ± 2% ~ (p=0.700 n=20+17) Tar 2.11s ± 2% 2.11s ± 3% ~ (p=0.480 n=18+20) XML 3.07s ± 2% 3.11s ± 4% +1.50% (p=0.043 n=20+20) [Geo mean] 5.61s 5.64s +0.55% name old text-bytes new text-bytes delta HelloSize 586kB ± 0% 586kB ± 0% ~ (all equal) name old data-bytes new data-bytes delta HelloSize 5.46kB ± 0% 5.46kB ± 0% ~ (all equal) name old bss-bytes new bss-bytes delta HelloSize 72.9kB ± 0% 72.9kB ± 0% ~ (all equal) name old exe-bytes new exe-bytes delta HelloSize 1.03MB ± 0% 1.03MB ± 0% ~ (all equal) 3. The go1 benchmark shows improvement totally, and even more than 10% improvement in the test case Revcomp. name old time/op new time/op delta BinaryTree17-4 42.0s ± 1% 41.5s ± 1% -1.32% (p=0.000 n=39+40) Fannkuch11-4 24.1s ± 1% 23.6s ± 0% -2.38% (p=0.000 n=40+40) FmtFprintfEmpty-4 843ns ± 0% 839ns ± 1% -0.46% (p=0.000 n=33+40) FmtFprintfString-4 1.44µs ± 1% 1.37µs ± 1% -5.48% (p=0.000 n=40+35) FmtFprintfInt-4 1.44µs ± 1% 1.41µs ± 2% -1.50% (p=0.000 n=40+40) FmtFprintfIntInt-4 2.07µs ± 1% 2.06µs ± 0% -0.78% (p=0.000 n=40+40) FmtFprintfPrefixedInt-4 2.50µs ± 1% 2.33µs ± 1% -6.85% (p=0.000 n=40+40) FmtFprintfFloat-4 4.36µs ± 1% 4.34µs ± 0% -0.39% (p=0.017 n=40+40) FmtManyArgs-4 8.11µs ± 0% 8.00µs ± 0% -1.37% (p=0.000 n=40+40) GobDecode-4 105ms ± 2% 103ms ± 2% -2.17% (p=0.000 n=39+39) GobEncode-4 90.1ms ± 2% 88.6ms ± 1% -1.67% (p=0.000 n=40+39) Gzip-4 4.18s ± 1% 4.09s ± 1% -2.03% (p=0.000 n=40+40) Gunzip-4 608ms ± 1% 603ms ± 1% -0.86% (p=0.000 n=40+34) HTTPClientServer-4 674µs ± 3% 661µs ± 2% -1.82% (p=0.000 n=40+39) JSONEncode-4 256ms ± 1% 243ms ± 0% -5.11% (p=0.000 n=39+31) JSONDecode-4 915ms ± 1% 904ms ± 1% -1.18% (p=0.000 n=40+36) Mandelbrot200-4 49.2ms ± 0% 49.3ms ± 0% ~ (p=0.254 n=34+40) GoParse-4 46.9ms ± 2% 46.9ms ± 1% ~ (p=0.737 n=40+39) RegexpMatchEasy0_32-4 1.28µs ± 1% 1.27µs ± 1% -0.71% (p=0.000 n=40+40) RegexpMatchEasy0_1K-4 7.86µs ± 4% 7.67µs ± 4% -2.46% (p=0.000 n=38+40) RegexpMatchEasy1_32-4 1.28µs ± 1% 1.28µs ± 1% -0.54% (p=0.000 n=40+40) RegexpMatchEasy1_1K-4 10.4µs ± 2% 10.3µs ± 2% -0.88% (p=0.003 n=40+39) RegexpMatchMedium_32-4 2.05µs ± 0% 2.04µs ± 0% -0.34% (p=0.000 n=40+33) RegexpMatchMedium_1K-4 541µs ± 1% 535µs ± 1% -1.02% (p=0.000 n=40+38) RegexpMatchHard_32-4 29.3µs ± 1% 29.1µs ± 1% -0.51% (p=0.000 n=40+40) RegexpMatchHard_1K-4 881µs ± 1% 871µs ± 1% -1.15% (p=0.000 n=40+40) Revcomp-4 81.7ms ± 2% 67.5ms ± 2% -17.37% (p=0.000 n=39+39) Template-4 1.05s ± 1% 1.08s ± 2% +3.67% (p=0.000 n=40+40) TimeParse-4 7.24µs ± 1% 7.09µs ± 1% -2.13% (p=0.000 n=40+40) TimeFormat-4 13.2µs ± 1% 13.1µs ± 0% -0.31% (p=0.007 n=40+31) [Geo mean] 733µs 718µs -2.03% name old speed new speed delta GobDecode-4 7.28MB/s ± 2% 7.44MB/s ± 2% +2.23% (p=0.000 n=39+39) GobEncode-4 8.52MB/s ± 2% 8.67MB/s ± 1% +1.70% (p=0.000 n=40+39) Gzip-4 4.65MB/s ± 1% 4.74MB/s ± 1% +1.94% (p=0.000 n=37+40) Gunzip-4 31.9MB/s ± 1% 32.2MB/s ± 1% +0.90% (p=0.000 n=40+36) JSONEncode-4 7.57MB/s ± 1% 7.98MB/s ± 0% +5.41% (p=0.000 n=40+31) JSONDecode-4 2.12MB/s ± 1% 2.15MB/s ± 1% +1.23% (p=0.000 n=40+40) GoParse-4 1.23MB/s ± 1% 1.23MB/s ± 1% ~ (p=0.769 n=39+40) RegexpMatchEasy0_32-4 25.0MB/s ± 1% 25.2MB/s ± 1% +0.71% (p=0.000 n=40+40) RegexpMatchEasy0_1K-4 130MB/s ± 5% 134MB/s ± 4% +2.53% (p=0.000 n=38+40) RegexpMatchEasy1_32-4 24.9MB/s ± 1% 25.1MB/s ± 1% +0.55% (p=0.000 n=40+40) RegexpMatchEasy1_1K-4 98.5MB/s ± 2% 99.4MB/s ± 2% +0.88% (p=0.003 n=40+39) RegexpMatchMedium_32-4 490kB/s ± 0% 490kB/s ± 0% ~ (all equal) RegexpMatchMedium_1K-4 1.89MB/s ± 1% 1.91MB/s ± 1% +1.02% (p=0.000 n=40+38) RegexpMatchHard_32-4 1.10MB/s ± 1% 1.10MB/s ± 0% +0.41% (p=0.000 n=40+33) RegexpMatchHard_1K-4 1.16MB/s ± 1% 1.17MB/s ± 1% +1.21% (p=0.000 n=40+40) Revcomp-4 31.1MB/s ± 2% 37.6MB/s ± 2% +21.03% (p=0.000 n=39+39) Template-4 1.86MB/s ± 1% 1.79MB/s ± 1% -3.51% (p=0.000 n=40+38) [Geo mean] 6.66MB/s 6.80MB/s +2.13% fixes #21492 Change-Id: Ia26e7ca393f0a5f31de240e8ff9a220453ca7e0d Reviewed-on: https://go-review.googlesource.com/58450Reviewed-by: Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
a2f22a68 · Ben Shi · Cherry Zhang · 1fe1512f · a2f22a68 · a2f22a68
Commit a2f22a68 authored Aug 24, 2017 by Ben Shi Committed by Cherry Zhang Aug 28, 2017
5 changed files
--- a/src/cmd/compile/internal/arm/ssa.go
+++ b/src/cmd/compile/internal/arm/ssa.go
@@ -516,7 +516,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
 		p.To.Type = obj.TYPE_MEM
 		p.To.Reg = v.Args[0].Reg()
 		gc.AddAux(&p.To, v)
-	case ssa.OpARMMOVWloadidx:
+	case ssa.OpARMMOVWloadidx, ssa.OpARMMOVBUloadidx, ssa.OpARMMOVBloadidx, ssa.OpARMMOVHUloadidx, ssa.OpARMMOVHloadidx:
 		// this is just shift 0 bits
 		fallthrough
 	case ssa.OpARMMOVWloadshiftLL:
@@ -528,7 +528,7 @@ func ssaGenValue(s *gc.SSAGenState, v *ssa.Value) {
 	case ssa.OpARMMOVWloadshiftRA:
 		p := genshift(s, v.Op.Asm(), 0, v.Args[1].Reg(), v.Reg(), arm.SHIFT_AR, v.AuxInt)
 		p.From.Reg = v.Args[0].Reg()
-	case ssa.OpARMMOVWstoreidx:
+	case ssa.OpARMMOVWstoreidx, ssa.OpARMMOVBstoreidx, ssa.OpARMMOVHstoreidx:
 		// this is just shift 0 bits
 		fallthrough
 	case ssa.OpARMMOVWstoreshiftLL:

--- a/src/cmd/compile/internal/ssa/gen/ARM.rules
+++ b/src/cmd/compile/internal/ssa/gen/ARM.rules
@@ -499,6 +499,10 @@
 (MOVWloadshiftLL ptr idx [c] (MOVWstoreshiftLL ptr2 idx [d] x _)) && c==d && isSamePtr(ptr, ptr2) -> x
 (MOVWloadshiftRL ptr idx [c] (MOVWstoreshiftRL ptr2 idx [d] x _)) && c==d && isSamePtr(ptr, ptr2) -> x
 (MOVWloadshiftRA ptr idx [c] (MOVWstoreshiftRA ptr2 idx [d] x _)) && c==d && isSamePtr(ptr, ptr2) -> x
+(MOVBUloadidx ptr idx (MOVBstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) -> (MOVBUreg x)
+(MOVBloadidx ptr idx (MOVBstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) -> (MOVBreg x)
+(MOVHUloadidx ptr idx (MOVHstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) -> (MOVHUreg x)
+(MOVHloadidx ptr idx (MOVHstoreidx ptr2 idx x _)) && isSamePtr(ptr, ptr2) -> (MOVHreg x)

 // fold constant into arithmatic ops
 (ADD x (MOVWconst [c])) -> (ADDconst [c] x)
@@ -1152,13 +1156,31 @@
 (MOVWstore [0] {sym} (ADDshiftLL ptr idx [c]) val mem) && sym == nil && !config.nacl -> (MOVWstoreshiftLL ptr idx [c] val mem)
 (MOVWstore [0] {sym} (ADDshiftRL ptr idx [c]) val mem) && sym == nil && !config.nacl -> (MOVWstoreshiftRL ptr idx [c] val mem)
 (MOVWstore [0] {sym} (ADDshiftRA ptr idx [c]) val mem) && sym == nil && !config.nacl -> (MOVWstoreshiftRA ptr idx [c] val mem)
+(MOVBUload [0] {sym} (ADD ptr idx) mem) && sym == nil && !config.nacl -> (MOVBUloadidx ptr idx mem)
+(MOVBload [0] {sym} (ADD ptr idx) mem) && sym == nil && !config.nacl -> (MOVBloadidx ptr idx mem)
+(MOVBstore [0] {sym} (ADD ptr idx) val mem) && sym == nil && !config.nacl -> (MOVBstoreidx ptr idx val mem)
+(MOVHUload [0] {sym} (ADD ptr idx) mem) && sym == nil && !config.nacl -> (MOVHUloadidx ptr idx mem)
+(MOVHload [0] {sym} (ADD ptr idx) mem) && sym == nil && !config.nacl -> (MOVHloadidx ptr idx mem)
+(MOVHstore [0] {sym} (ADD ptr idx) val mem) && sym == nil && !config.nacl -> (MOVHstoreidx ptr idx val mem)

 // constant folding in indexed loads and stores
 (MOVWloadidx ptr (MOVWconst [c]) mem) -> (MOVWload [c] ptr mem)
 (MOVWloadidx (MOVWconst [c]) ptr mem) -> (MOVWload [c] ptr mem)
+(MOVBloadidx ptr (MOVWconst [c]) mem) -> (MOVBload [c] ptr mem)
+(MOVBloadidx (MOVWconst [c]) ptr mem) -> (MOVBload [c] ptr mem)
+(MOVBUloadidx ptr (MOVWconst [c]) mem) -> (MOVBUload [c] ptr mem)
+(MOVBUloadidx (MOVWconst [c]) ptr mem) -> (MOVBUload [c] ptr mem)
+(MOVHUloadidx ptr (MOVWconst [c]) mem) -> (MOVHUload [c] ptr mem)
+(MOVHUloadidx (MOVWconst [c]) ptr mem) -> (MOVHUload [c] ptr mem)
+(MOVHloadidx ptr (MOVWconst [c]) mem) -> (MOVHload [c] ptr mem)
+(MOVHloadidx (MOVWconst [c]) ptr mem) -> (MOVHload [c] ptr mem)

 (MOVWstoreidx ptr (MOVWconst [c]) val mem) -> (MOVWstore [c] ptr val mem)
 (MOVWstoreidx (MOVWconst [c]) ptr val mem) -> (MOVWstore [c] ptr val mem)
+(MOVBstoreidx ptr (MOVWconst [c]) val mem) -> (MOVBstore [c] ptr val mem)
+(MOVBstoreidx (MOVWconst [c]) ptr val mem) -> (MOVBstore [c] ptr val mem)
+(MOVHstoreidx ptr (MOVWconst [c]) val mem) -> (MOVHstore [c] ptr val mem)
+(MOVHstoreidx (MOVWconst [c]) ptr val mem) -> (MOVHstore [c] ptr val mem)

 (MOVWloadidx ptr (SLLconst idx [c]) mem) -> (MOVWloadshiftLL ptr idx [c] mem)
 (MOVWloadidx (SLLconst idx [c]) ptr mem) -> (MOVWloadshiftLL ptr idx [c] mem)

--- a/src/cmd/compile/internal/ssa/gen/ARMOps.go
+++ b/src/cmd/compile/internal/ssa/gen/ARMOps.go
@@ -346,11 +346,17 @@ func init() {
 		{name: "MOVWloadshiftLL", argLength: 3, reg: gp2load, asm: "MOVW", aux: "Int32"}, // load from arg0 + arg1<<auxInt. arg2=mem
 		{name: "MOVWloadshiftRL", argLength: 3, reg: gp2load, asm: "MOVW", aux: "Int32"}, // load from arg0 + arg1>>auxInt, unsigned shift. arg2=mem
 		{name: "MOVWloadshiftRA", argLength: 3, reg: gp2load, asm: "MOVW", aux: "Int32"}, // load from arg0 + arg1>>auxInt, signed shift. arg2=mem
+		{name: "MOVBUloadidx", argLength: 3, reg: gp2load, asm: "MOVBU"},                 // load from arg0 + arg1. arg2=mem
+		{name: "MOVBloadidx", argLength: 3, reg: gp2load, asm: "MOVB"},                   // load from arg0 + arg1. arg2=mem
+		{name: "MOVHUloadidx", argLength: 3, reg: gp2load, asm: "MOVHU"},                 // load from arg0 + arg1. arg2=mem
+		{name: "MOVHloadidx", argLength: 3, reg: gp2load, asm: "MOVH"},                   // load from arg0 + arg1. arg2=mem

 		{name: "MOVWstoreidx", argLength: 4, reg: gp2store, asm: "MOVW"},                   // store arg2 to arg0 + arg1. arg3=mem
 		{name: "MOVWstoreshiftLL", argLength: 4, reg: gp2store, asm: "MOVW", aux: "Int32"}, // store arg2 to arg0 + arg1<<auxInt. arg3=mem
 		{name: "MOVWstoreshiftRL", argLength: 4, reg: gp2store, asm: "MOVW", aux: "Int32"}, // store arg2 to arg0 + arg1>>auxInt, unsigned shift. arg3=mem
 		{name: "MOVWstoreshiftRA", argLength: 4, reg: gp2store, asm: "MOVW", aux: "Int32"}, // store arg2 to arg0 + arg1>>auxInt, signed shift. arg3=mem
+		{name: "MOVBstoreidx", argLength: 4, reg: gp2store, asm: "MOVB"},                   // store arg2 to arg0 + arg1. arg3=mem
+		{name: "MOVHstoreidx", argLength: 4, reg: gp2store, asm: "MOVH"},                   // store arg2 to arg0 + arg1. arg3=mem

 		{name: "MOVBreg", argLength: 1, reg: gp11, asm: "MOVBS"},  // move from arg0, sign-extended from byte
 		{name: "MOVBUreg", argLength: 1, reg: gp11, asm: "MOVBU"}, // move from arg0, unsign-extended from byte

--- a/src/cmd/compile/internal/ssa/opGen.go
+++ b/src/cmd/compile/internal/ssa/opGen.go
@@ -847,10 +847,16 @@ const (
 	OpARMMOVWloadshiftLL
 	OpARMMOVWloadshiftRL
 	OpARMMOVWloadshiftRA
+	OpARMMOVBUloadidx
+	OpARMMOVBloadidx
+	OpARMMOVHUloadidx
+	OpARMMOVHloadidx
 	OpARMMOVWstoreidx
 	OpARMMOVWstoreshiftLL
 	OpARMMOVWstoreshiftRL
 	OpARMMOVWstoreshiftRA
+	OpARMMOVBstoreidx
+	OpARMMOVHstoreidx
 	OpARMMOVBreg
 	OpARMMOVBUreg
 	OpARMMOVHreg
@@ -10651,6 +10657,62 @@ var opcodeTable = [...]opInfo{
 			},
 		},
 	},
+	{
+		name:   "MOVBUloadidx",
+		argLen: 3,
+		asm:    arm.AMOVBU,
+		reg: regInfo{
+			inputs: []inputInfo{
+				{1, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{0, 4294998015}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 SP R14 SB
+			},
+			outputs: []outputInfo{
+				{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
+			},
+		},
+	},
+	{
+		name:   "MOVBloadidx",
+		argLen: 3,
+		asm:    arm.AMOVB,
+		reg: regInfo{
+			inputs: []inputInfo{
+				{1, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{0, 4294998015}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 SP R14 SB
+			},
+			outputs: []outputInfo{
+				{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
+			},
+		},
+	},
+	{
+		name:   "MOVHUloadidx",
+		argLen: 3,
+		asm:    arm.AMOVHU,
+		reg: regInfo{
+			inputs: []inputInfo{
+				{1, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{0, 4294998015}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 SP R14 SB
+			},
+			outputs: []outputInfo{
+				{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
+			},
+		},
+	},
+	{
+		name:   "MOVHloadidx",
+		argLen: 3,
+		asm:    arm.AMOVH,
+		reg: regInfo{
+			inputs: []inputInfo{
+				{1, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{0, 4294998015}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 SP R14 SB
+			},
+			outputs: []outputInfo{
+				{0, 21503}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14
+			},
+		},
+	},
 	{
 		name:   "MOVWstoreidx",
 		argLen: 4,
@@ -10702,6 +10764,30 @@ var opcodeTable = [...]opInfo{
 			},
 		},
 	},
+	{
+		name:   "MOVBstoreidx",
+		argLen: 4,
+		asm:    arm.AMOVB,
+		reg: regInfo{
+			inputs: []inputInfo{
+				{1, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{2, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{0, 4294998015}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 SP R14 SB
+			},
+		},
+	},
+	{
+		name:   "MOVHstoreidx",
+		argLen: 4,
+		asm:    arm.AMOVH,
+		reg: regInfo{
+			inputs: []inputInfo{
+				{1, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{2, 22527},      // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 R14
+				{0, 4294998015}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 g R12 SP R14 SB
+			},
+		},
+	},
 	{
 		name:   "MOVBreg",
 		argLen: 1,

--- a/src/cmd/compile/internal/ssa/rewriteARM.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM.go