s390x: reduce one VN call

emmansun · Nov 11, 2024 · 81d389d · 81d389d
1 parent f9322d2
commit 81d389d
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/base64_s390x.s b/base64_s390x.s
@@ -153,8 +153,7 @@ TEXT ·decodeStdAsm(SB),NOSPLIT,$0
 loop:
 		VL (R2), X0
 		// validate the input
-		VESRLF $4, X0, X1
-		VN X1, NIBBLE_MASK, X1 // high nibbles
+		VESRLB $4, X0, X1 // high nibbles
 		VN X0, NIBBLE_MASK, X2
 		VPERM LUT_HI, LUT_HI, X1, X3
 		VPERM LUT_LO, LUT_LO, X2, X2
@@ -216,8 +215,7 @@ TEXT ·decodeUrlAsm(SB),NOSPLIT,$0
 loop:
 		VL (R2), X0
 		// validate the input
-		VESRLF $4, X0, X1
-		VN X1, NIBBLE_MASK, X1 // high nibbles
+		VESRLB $4, X0, X1 // high nibbles
 		VN X0, NIBBLE_MASK, X2
 		VPERM LUT_HI, LUT_HI, X1, X3
 		VPERM LUT_LO, LUT_LO, X2, X2