cmd/internal/obj/arm64: remove AMOVBU from optab

The instruction format of MOVBU is the same with MOVB, this CL deletes
MOVBU from optab for simplicity.

Change-Id: Ib034d6c29dd9793cf3e6f9fa8abff0ed0d931d0e
Reviewed-on: https://go-review.googlesource.com/c/go/+/445295
Run-TryBot: Eric Fang <eric.fang@arm.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>

1 files changed, 1 insertions, 22 deletions

diff --git a/src/cmd/internal/obj/arm64/asm7.go b/src/cmd/internal/obj/arm64/asm7.go
index 62b34e2464..95053163c5 100644
--- a/src/cmd/internal/obj/arm64/asm7.go
+++ b/src/cmd/internal/obj/arm64/asm7.go
@@ -395,8 +395,7 @@ var optab = []Optab{
 	{AMOVD, C_RSP, C_NONE, C_NONE, C_RSP, 24, 4, 0, 0, 0},
 	{AMOVD, C_ZREG, C_NONE, C_NONE, C_ZREG, 24, 4, 0, 0, 0},
 	{AMVN, C_ZREG, C_NONE, C_NONE, C_ZREG, 24, 4, 0, 0, 0},
-	{AMOVB, C_ZREG, C_NONE, C_NONE, C_ZREG, 45, 4, 0, 0, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_ZREG, 45, 4, 0, 0, 0},
+	{AMOVB, C_ZREG, C_NONE, C_NONE, C_ZREG, 45, 4, 0, 0, 0}, /* also MOVBU */
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_ZREG, 45, 4, 0, 0, 0}, /* also MOVHU */
 	{AMOVW, C_ZREG, C_NONE, C_NONE, C_ZREG, 45, 4, 0, 0, 0}, /* also MOVWU */
 	/* TODO: MVN C_SHIFT */
@@ -466,12 +465,10 @@ var optab = []Optab{
 	{AMOVW, C_VCONADDR, C_NONE, C_NONE, C_ZREG, 68, 8, 0, NOTUSETMP, 0},
 	{AMOVD, C_VCONADDR, C_NONE, C_NONE, C_ZREG, 68, 8, 0, NOTUSETMP, 0},
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
 	{AMOVW, C_ZREG, C_NONE, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
 	{AMOVD, C_ZREG, C_NONE, C_NONE, C_ADDR, 64, 12, 0, 0, 0},
 	{AMOVB, C_ADDR, C_NONE, C_NONE, C_ZREG, 65, 12, 0, 0, 0},
-	{AMOVBU, C_ADDR, C_NONE, C_NONE, C_ZREG, 65, 12, 0, 0, 0},
 	{AMOVH, C_ADDR, C_NONE, C_NONE, C_ZREG, 65, 12, 0, 0, 0},
 	{AMOVW, C_ADDR, C_NONE, C_NONE, C_ZREG, 65, 12, 0, 0, 0},
 	{AMOVD, C_ADDR, C_NONE, C_NONE, C_ZREG, 65, 12, 0, 0, 0},
@@ -525,8 +522,6 @@ var optab = []Optab{
 	/* scaled 12-bit unsigned displacement store */
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_UAUTO4K, 20, 4, REGSP, 0, 0},
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_UOREG4K, 20, 4, 0, 0, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_UAUTO4K, 20, 4, REGSP, 0, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_UOREG4K, 20, 4, 0, 0, 0},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_UAUTO8K, 20, 4, REGSP, 0, 0},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_UOREG8K, 20, 4, 0, 0, 0},
 	{AMOVW, C_ZREG, C_NONE, C_NONE, C_UAUTO16K, 20, 4, REGSP, 0, 0},
@@ -544,8 +539,6 @@ var optab = []Optab{
 	/* unscaled 9-bit signed displacement store */
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_NSOREG, 20, 4, 0, 0, 0},
 	{AMOVW, C_ZREG, C_NONE, C_NONE, C_NSAUTO, 20, 4, REGSP, 0, 0},
@@ -563,8 +556,6 @@ var optab = []Optab{
 	/* scaled 12-bit unsigned displacement load */
 	{AMOVB, C_UAUTO4K, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
 	{AMOVB, C_UOREG4K, C_NONE, C_NONE, C_ZREG, 21, 4, 0, 0, 0},
-	{AMOVBU, C_UAUTO4K, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
-	{AMOVBU, C_UOREG4K, C_NONE, C_NONE, C_ZREG, 21, 4, 0, 0, 0},
 	{AMOVH, C_UAUTO8K, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
 	{AMOVH, C_UOREG8K, C_NONE, C_NONE, C_ZREG, 21, 4, 0, 0, 0},
 	{AMOVW, C_UAUTO16K, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
@@ -582,8 +573,6 @@ var optab = []Optab{
 	/* unscaled 9-bit signed displacement load */
 	{AMOVB, C_NSAUTO, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
 	{AMOVB, C_NSOREG, C_NONE, C_NONE, C_ZREG, 21, 4, 0, 0, 0},
-	{AMOVBU, C_NSAUTO, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
-	{AMOVBU, C_NSOREG, C_NONE, C_NONE, C_ZREG, 21, 4, 0, 0, 0},
 	{AMOVH, C_NSAUTO, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
 	{AMOVH, C_NSOREG, C_NONE, C_NONE, C_ZREG, 21, 4, 0, 0, 0},
 	{AMOVW, C_NSAUTO, C_NONE, C_NONE, C_ZREG, 21, 4, REGSP, 0, 0},
@@ -601,8 +590,6 @@ var optab = []Optab{
 	/* long displacement store */
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_LAUTO, 30, 8, REGSP, LTO, 0},
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_LOREG, 30, 8, 0, LTO, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_LAUTO, 30, 8, REGSP, LTO, 0},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_LOREG, 30, 8, 0, LTO, 0},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_LAUTO, 30, 8, REGSP, LTO, 0},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_LOREG, 30, 8, 0, LTO, 0},
 	{AMOVW, C_ZREG, C_NONE, C_NONE, C_LAUTO, 30, 8, REGSP, LTO, 0},
@@ -620,8 +607,6 @@ var optab = []Optab{
 	/* long displacement load */
 	{AMOVB, C_LAUTO, C_NONE, C_NONE, C_ZREG, 31, 8, REGSP, LFROM, 0},
 	{AMOVB, C_LOREG, C_NONE, C_NONE, C_ZREG, 31, 8, 0, LFROM, 0},
-	{AMOVBU, C_LAUTO, C_NONE, C_NONE, C_ZREG, 31, 8, REGSP, LFROM, 0},
-	{AMOVBU, C_LOREG, C_NONE, C_NONE, C_ZREG, 31, 8, 0, LFROM, 0},
 	{AMOVH, C_LAUTO, C_NONE, C_NONE, C_ZREG, 31, 8, REGSP, LFROM, 0},
 	{AMOVH, C_LOREG, C_NONE, C_NONE, C_ZREG, 31, 8, 0, LFROM, 0},
 	{AMOVW, C_LAUTO, C_NONE, C_NONE, C_ZREG, 31, 8, REGSP, LFROM, 0},
@@ -641,7 +626,6 @@ var optab = []Optab{
 	{AMOVW, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPOST},
 	{AMOVH, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPOST},
 	{AMOVB, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPOST},
-	{AMOVBU, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPOST},
 	{AFMOVS, C_LOREG, C_NONE, C_NONE, C_FREG, 22, 4, 0, 0, C_XPOST},
 	{AFMOVD, C_LOREG, C_NONE, C_NONE, C_FREG, 22, 4, 0, 0, C_XPOST},
 	{AFMOVQ, C_LOREG, C_NONE, C_NONE, C_FREG, 22, 4, 0, 0, C_XPOST},
@@ -650,7 +634,6 @@ var optab = []Optab{
 	{AMOVW, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPRE},
 	{AMOVH, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPRE},
 	{AMOVB, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPRE},
-	{AMOVBU, C_LOREG, C_NONE, C_NONE, C_ZREG, 22, 4, 0, 0, C_XPRE},
 	{AFMOVS, C_LOREG, C_NONE, C_NONE, C_FREG, 22, 4, 0, 0, C_XPRE},
 	{AFMOVD, C_LOREG, C_NONE, C_NONE, C_FREG, 22, 4, 0, 0, C_XPRE},
 	{AFMOVQ, C_LOREG, C_NONE, C_NONE, C_FREG, 22, 4, 0, 0, C_XPRE},
@@ -660,7 +643,6 @@ var optab = []Optab{
 	{AMOVW, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
 	{AFMOVS, C_FREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
 	{AFMOVD, C_FREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
 	{AFMOVQ, C_FREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPOST},
@@ -669,7 +651,6 @@ var optab = []Optab{
 	{AMOVW, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
 	{AMOVH, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
 	{AMOVB, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
-	{AMOVBU, C_ZREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
 	{AFMOVS, C_FREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
 	{AFMOVD, C_FREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
 	{AFMOVQ, C_FREG, C_NONE, C_NONE, C_LOREG, 23, 4, 0, 0, C_XPRE},
@@ -679,7 +660,6 @@ var optab = []Optab{
 	{AMOVW, C_ROFF, C_NONE, C_NONE, C_ZREG, 98, 4, 0, 0, 0},
 	{AMOVH, C_ROFF, C_NONE, C_NONE, C_ZREG, 98, 4, 0, 0, 0},
 	{AMOVB, C_ROFF, C_NONE, C_NONE, C_ZREG, 98, 4, 0, 0, 0},
-	{AMOVBU, C_ROFF, C_NONE, C_NONE, C_ZREG, 98, 4, 0, 0, 0},
 	{AFMOVS, C_ROFF, C_NONE, C_NONE, C_FREG, 98, 4, 0, 0, 0},
 	{AFMOVD, C_ROFF, C_NONE, C_NONE, C_FREG, 98, 4, 0, 0, 0},
 
@@ -2866,7 +2846,6 @@ func buildop(ctxt *obj.Link) {
 			oprangeset(ACSETMW, t)
 
 		case AMOVD,
-			AMOVBU,
 			AB,
 			ABL,
 			AWORD,