diff --git a/autotest/SIMD_CMP/Etalon.log b/autotest/SIMD_CMP/Etalon.log
index fe79cb01a..6cd6c3768 100644
--- a/autotest/SIMD_CMP/Etalon.log
+++ b/autotest/SIMD_CMP/Etalon.log
@@ -1,4 +1,4 @@
-* /Users/cxl/out/CLANG.Debug.Debug_Full.Shared/SIMD_CMP 02.04.2025 12:04:20, user: cxl
+* C:\upp\out\autotest\CLANGx64.Debug.Debug_Full\SIMD_CMP.exe 10.04.2025 07:43:11, user: mirek
 
 =============== f32x4
 a = 9 9 9 9
@@ -12,6 +12,7 @@ b = 0 0 0 0
 AllTrue(c == b) = false
 AnyTrue(c == b) = false
 CountTrue(c == b) = 0
+FirstFalse(c == b) = 0
 matches = 
 ---
 a = 9 9 9 0
@@ -20,12 +21,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 3
 FirstTrue(c == a) = 1
+FirstFalse(c == a) = 0
 matches = 1 2 3 
 b = 0 0 0 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 1
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 1
 matches = 0 
 ---
 a = 9 9 0 0
@@ -34,12 +37,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 2
 FirstTrue(c == a) = 2
+FirstFalse(c == a) = 0
 matches = 2 3 
 b = 0 0 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 2
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 2
 matches = 0 1 
 ---
 a = 9 0 0 0
@@ -48,12 +53,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 1
 FirstTrue(c == a) = 3
+FirstFalse(c == a) = 0
 matches = 3 
 b = 0 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 3
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 3
 matches = 0 1 2 
 ---
 a = 1 2 3 4
@@ -65,6 +72,7 @@ AnyTrue(a == b) = true
 AnyTrue(a == c) = false
 CountTrue(a == b) = 3
 FirstTrue(a == b) = 1
+FirstFalse(a == b) = 0
 =============== i16x8
 a = 9 9 9 9  9 9 9 9
 c = 9 9 9 9  9 9 9 9
@@ -77,6 +85,7 @@ b = 0 0 0 0  0 0 0 0
 AllTrue(c == b) = false
 AnyTrue(c == b) = false
 CountTrue(c == b) = 0
+FirstFalse(c == b) = 0
 matches = 
 ---
 a = 9 9 9 9  9 9 9 0
@@ -85,12 +94,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 7
 FirstTrue(c == a) = 1
+FirstFalse(c == a) = 0
 matches = 1 2 3 4 5 6 7 
 b = 0 0 0 0  0 0 0 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 1
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 1
 matches = 0 
 ---
 a = 9 9 9 9  9 9 0 0
@@ -99,12 +110,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 6
 FirstTrue(c == a) = 2
+FirstFalse(c == a) = 0
 matches = 2 3 4 5 6 7 
 b = 0 0 0 0  0 0 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 2
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 2
 matches = 0 1 
 ---
 a = 9 9 9 9  9 0 0 0
@@ -113,12 +126,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 5
 FirstTrue(c == a) = 3
+FirstFalse(c == a) = 0
 matches = 3 4 5 6 7 
 b = 0 0 0 0  0 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 3
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 3
 matches = 0 1 2 
 ---
 a = 9 9 9 9  0 0 0 0
@@ -127,12 +142,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 4
 FirstTrue(c == a) = 4
+FirstFalse(c == a) = 0
 matches = 4 5 6 7 
 b = 0 0 0 0  9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 4
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 4
 matches = 0 1 2 3 
 ---
 a = 9 9 9 0  0 0 0 0
@@ -141,12 +158,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 3
 FirstTrue(c == a) = 5
+FirstFalse(c == a) = 0
 matches = 5 6 7 
 b = 0 0 0 9  9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 5
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 5
 matches = 0 1 2 3 4 
 ---
 a = 9 9 0 0  0 0 0 0
@@ -155,12 +174,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 2
 FirstTrue(c == a) = 6
+FirstFalse(c == a) = 0
 matches = 6 7 
 b = 0 0 9 9  9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 6
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 6
 matches = 0 1 2 3 4 5 
 ---
 a = 9 0 0 0  0 0 0 0
@@ -169,12 +190,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 1
 FirstTrue(c == a) = 7
+FirstFalse(c == a) = 0
 matches = 7 
 b = 0 9 9 9  9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 7
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 7
 matches = 0 1 2 3 4 5 6 
 ---
 a = 1 2 3 4  5 6 7 8
@@ -186,6 +209,7 @@ AnyTrue(a == b) = true
 AnyTrue(a == c) = false
 CountTrue(a == b) = 4
 FirstTrue(a == b) = 1
+FirstFalse(a == b) = 0
 =============== i32x4
 a = 9 9 9 9
 c = 9 9 9 9
@@ -198,6 +222,7 @@ b = 0 0 0 0
 AllTrue(c == b) = false
 AnyTrue(c == b) = false
 CountTrue(c == b) = 0
+FirstFalse(c == b) = 0
 matches = 
 ---
 a = 9 9 9 0
@@ -206,12 +231,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 3
 FirstTrue(c == a) = 1
+FirstFalse(c == a) = 0
 matches = 1 2 3 
 b = 0 0 0 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 1
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 1
 matches = 0 
 ---
 a = 9 9 0 0
@@ -220,12 +247,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 2
 FirstTrue(c == a) = 2
+FirstFalse(c == a) = 0
 matches = 2 3 
 b = 0 0 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 2
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 2
 matches = 0 1 
 ---
 a = 9 0 0 0
@@ -234,12 +263,14 @@ AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 1
 FirstTrue(c == a) = 3
+FirstFalse(c == a) = 0
 matches = 3 
 b = 0 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 3
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 3
 matches = 0 1 2 
 ---
 a = 1 2 3 4
@@ -251,6 +282,7 @@ AnyTrue(a == b) = true
 AnyTrue(a == c) = false
 CountTrue(a == b) = 3
 FirstTrue(a == b) = 1
+FirstFalse(a == b) = 0
 =============== i8x16
 a = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
@@ -263,6 +295,7 @@ b = 0 0 0 0 . 0 0 0 0 . 0 0 0 0 . 0 0 0 0
 AllTrue(c == b) = false
 AnyTrue(c == b) = false
 CountTrue(c == b) = 0
+FirstFalse(c == b) = 0
 matches = 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 0
@@ -270,13 +303,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 15
-FirstTrue(c == a) = 1
+FirstTrue(c == a) = 0
+FirstFalse(c == a) = 0
 matches = 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 0 0 0 0 . 0 0 0 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 1
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 1
 matches = 0 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 0 0
@@ -284,13 +319,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 14
-FirstTrue(c == a) = 2
+FirstTrue(c == a) = 1
+FirstFalse(c == a) = 0
 matches = 2 3 4 5 6 7 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 0 0 0 0 . 0 0 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 2
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 2
 matches = 0 1 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 0 0 0
@@ -298,13 +335,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 13
-FirstTrue(c == a) = 3
+FirstTrue(c == a) = 1
+FirstFalse(c == a) = 0
 matches = 3 4 5 6 7 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 0 0 0 0 . 0 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 3
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 3
 matches = 0 1 2 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 0 0 0 0
@@ -312,13 +351,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 12
-FirstTrue(c == a) = 4
+FirstTrue(c == a) = 2
+FirstFalse(c == a) = 0
 matches = 4 5 6 7 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 0 0 0 0 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 4
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 4
 matches = 0 1 2 3 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 9 9 9 0 . 0 0 0 0
@@ -326,13 +367,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 11
-FirstTrue(c == a) = 5
+FirstTrue(c == a) = 2
+FirstFalse(c == a) = 0
 matches = 5 6 7 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 0 0 0 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 5
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 5
 matches = 0 1 2 3 4 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 9 9 0 0 . 0 0 0 0
@@ -340,13 +383,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 10
-FirstTrue(c == a) = 6
+FirstTrue(c == a) = 3
+FirstFalse(c == a) = 0
 matches = 6 7 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 0 0 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 6
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 6
 matches = 0 1 2 3 4 5 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 9 0 0 0 . 0 0 0 0
@@ -354,13 +399,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 9
-FirstTrue(c == a) = 7
+FirstTrue(c == a) = 3
+FirstFalse(c == a) = 0
 matches = 7 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 0 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 7
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 7
 matches = 0 1 2 3 4 5 6 
 ---
 a = 9 9 9 9 . 9 9 9 9 . 0 0 0 0 . 0 0 0 0
@@ -368,13 +415,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 8
-FirstTrue(c == a) = 8
+FirstTrue(c == a) = 4
+FirstFalse(c == a) = 0
 matches = 8 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 0 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 8
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 8
 matches = 0 1 2 3 4 5 6 7 
 ---
 a = 9 9 9 9 . 9 9 9 0 . 0 0 0 0 . 0 0 0 0
@@ -382,13 +431,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 7
-FirstTrue(c == a) = 9
+FirstTrue(c == a) = 4
+FirstFalse(c == a) = 0
 matches = 9 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 0 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 9
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 9
 matches = 0 1 2 3 4 5 6 7 8 
 ---
 a = 9 9 9 9 . 9 9 0 0 . 0 0 0 0 . 0 0 0 0
@@ -396,13 +447,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 6
-FirstTrue(c == a) = 10
+FirstTrue(c == a) = 5
+FirstFalse(c == a) = 0
 matches = 10 11 12 13 14 15 
 b = 0 0 0 0 . 0 0 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 10
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 10
 matches = 0 1 2 3 4 5 6 7 8 9 
 ---
 a = 9 9 9 9 . 9 0 0 0 . 0 0 0 0 . 0 0 0 0
@@ -410,13 +463,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 5
-FirstTrue(c == a) = 11
+FirstTrue(c == a) = 5
+FirstFalse(c == a) = 0
 matches = 11 12 13 14 15 
 b = 0 0 0 0 . 0 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 11
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 11
 matches = 0 1 2 3 4 5 6 7 8 9 10 
 ---
 a = 9 9 9 9 . 0 0 0 0 . 0 0 0 0 . 0 0 0 0
@@ -424,13 +479,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 4
-FirstTrue(c == a) = 12
+FirstTrue(c == a) = 6
+FirstFalse(c == a) = 0
 matches = 12 13 14 15 
 b = 0 0 0 0 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 12
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 12
 matches = 0 1 2 3 4 5 6 7 8 9 10 11 
 ---
 a = 9 9 9 0 . 0 0 0 0 . 0 0 0 0 . 0 0 0 0
@@ -438,13 +495,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 3
-FirstTrue(c == a) = 13
+FirstTrue(c == a) = 6
+FirstFalse(c == a) = 0
 matches = 13 14 15 
 b = 0 0 0 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 13
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 13
 matches = 0 1 2 3 4 5 6 7 8 9 10 11 12 
 ---
 a = 9 9 0 0 . 0 0 0 0 . 0 0 0 0 . 0 0 0 0
@@ -452,13 +511,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 2
-FirstTrue(c == a) = 14
+FirstTrue(c == a) = 7
+FirstFalse(c == a) = 0
 matches = 14 15 
 b = 0 0 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 14
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 14
 matches = 0 1 2 3 4 5 6 7 8 9 10 11 12 13 
 ---
 a = 9 0 0 0 . 0 0 0 0 . 0 0 0 0 . 0 0 0 0
@@ -466,13 +527,15 @@ c = 9 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == a) = false
 AnyTrue(c == a) = true
 CountTrue(c == a) = 1
-FirstTrue(c == a) = 15
+FirstTrue(c == a) = 7
+FirstFalse(c == a) = 0
 matches = 15 
 b = 0 9 9 9 . 9 9 9 9 . 9 9 9 9 . 9 9 9 9
 AllTrue(c == b) = false
 AnyTrue(c == b) = true
 CountTrue(c == b) = 15
 FirstTrue(c == b) = 0
+FirstFalse(c == b) = 15
 matches = 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 
 ---
 a = 1 2 3 4 . 5 6 7 8 . 1 2 3 4 . 5 6 7 8
@@ -483,4 +546,5 @@ AllTrue(a == a) = true
 AnyTrue(a == b) = true
 AnyTrue(a == c) = false
 CountTrue(a == b) = 8
-FirstTrue(a == b) = 1
+FirstTrue(a == b) = 0
+FirstFalse(a == b) = 0
diff --git a/autotest/SIMD_CMP/SIMD_CMP.cpp b/autotest/SIMD_CMP/SIMD_CMP.cpp
index 042135f34..bf5a3c58b 100644
--- a/autotest/SIMD_CMP/SIMD_CMP.cpp
+++ b/autotest/SIMD_CMP/SIMD_CMP.cpp
@@ -23,6 +23,8 @@ T Test()
 		DDUMP(CountTrue(c == a));
 		if(AnyTrue(c == a))
 			DDUMP(FirstTrue(c == a));
+		if(!AllTrue(c == a))
+			DDUMP(FirstFalse(c == a));
 		String matches;
 		for(int j = 0; j < n; j++)
 			if(IsTrue(c == a, j))
@@ -34,6 +36,8 @@ T Test()
 		DDUMP(CountTrue(c == b));
 		if(AnyTrue(c == b))
 			DDUMP(FirstTrue(c == b));
+		if(!AllTrue(c == b))
+			DDUMP(FirstFalse(c == b));
 		matches.Clear();
 		for(int j = 0; j < n; j++)
 			if(IsTrue(c == b, j))
@@ -68,6 +72,7 @@ CONSOLE_APP_MAIN
 		DDUMP(AnyTrue(a == c));
 		DDUMP(CountTrue(a == b));
 		DDUMP(FirstTrue(a == b));
+		DDUMP(FirstFalse(a == b));
 	}
 	DLOG("=============== i16x8");
 	{
@@ -85,6 +90,7 @@ CONSOLE_APP_MAIN
 		DDUMP(AnyTrue(a == c));
 		DDUMP(CountTrue(a == b));
 		DDUMP(FirstTrue(a == b));
+		DDUMP(FirstFalse(a == b));
 	}
 	DLOG("=============== i32x4");
 	{
@@ -102,6 +108,7 @@ CONSOLE_APP_MAIN
 		DDUMP(AnyTrue(a == c));
 		DDUMP(CountTrue(a == b));
 		DDUMP(FirstTrue(a == b));
+		DDUMP(FirstFalse(a == b));
 	}
 	DLOG("=============== i8x16");
 	{
@@ -119,6 +126,7 @@ CONSOLE_APP_MAIN
 		DDUMP(AnyTrue(a == c));
 		DDUMP(CountTrue(a == b));
 		DDUMP(FirstTrue(a == b));
+		DDUMP(FirstFalse(a == b));
 	}
 	CheckLogEtalon();
 }
diff --git a/uppsrc/Core/SIMD_NEON.h b/uppsrc/Core/SIMD_NEON.h
index bdc661b8c..288fc558b 100644
--- a/uppsrc/Core/SIMD_NEON.h
+++ b/uppsrc/Core/SIMD_NEON.h
@@ -67,6 +67,7 @@ force_inline bool   AllTrue(f32x4 a)                { return cmaskf__(a.data) ==
 force_inline bool   AnyTrue(f32x4 a)                { return cmaskf__(a.data); }
 force_inline int    CountTrue(f32x4 a)              { return CountBits64(cmaskf__(a.data)) >> 4; }
 force_inline int    FirstTrue(f32x4 a)              { return CountTrailingZeroBits64(cmaskf__(a.data)) >> 4; }
+force_inline int    FirstFalse(f32x4 a)             { return CountTrailingZeroBits64(~cmaskf__(a.data)) >> 4; }
 force_inline bool   IsTrue(f32x4 a, int i)          { return cmaskf__(a.data) & ((uint64)1 << (i << 4)); }
 
 force_inline f32x4 min(f32x4 a, f32x4 b)          { return vminq_f32(a, b); }
@@ -133,6 +134,7 @@ force_inline bool   AllTrue(i16x8 a)                { return cmask16__(a.data) =
 force_inline bool   AnyTrue(i16x8 a)                { return cmask16__(a.data); }
 force_inline int    CountTrue(i16x8 a)              { return CountBits64(cmask16__(a.data)) >> 3; }
 force_inline int    FirstTrue(i16x8 a)              { return CountTrailingZeroBits64(cmask16__(a.data)) >> 3; }
+force_inline int    FirstFalse(i16x8 a)             { return CountTrailingZeroBits64(~cmask16__(a.data)) >> 3; }
 force_inline bool   IsTrue(i16x8 a, int i)          { return cmask16__(a.data) & ((uint64)1 << (i << 3)); }
 
 struct i32x4 { // 4xint32
@@ -190,6 +192,7 @@ force_inline bool   AllTrue(i32x4 a)                { return cmask32__(a.data) =
 force_inline bool   AnyTrue(i32x4 a)                { return cmask32__(a.data); }
 force_inline int    CountTrue(i32x4 a)              { return CountBits64(cmask32__(a.data)) >> 4; }
 force_inline int    FirstTrue(i32x4 a)              { return CountTrailingZeroBits64(cmask32__(a.data)) >> 4; }
+force_inline int    FirstFalse(i32x4 a)             { return CountTrailingZeroBits64(~cmask32__(a.data)) >> 4; }
 force_inline bool   IsTrue(i32x4 a, int i)          { return cmask32__(a.data) & ((uint64)1 << (i << 4)); }
 
 struct i8x16 { // 16*int8
@@ -247,6 +250,7 @@ force_inline bool   AllTrue(i8x16 a)               { return cmask8__(a.data) ==
 force_inline bool   AnyTrue(i8x16 a)               { return cmask8__(a.data); }
 force_inline int    CountTrue(i8x16 a)             { return CountBits64(cmask8__(a.data)) >> 2; }
 force_inline int    FirstTrue(i8x16 a)             { return CountTrailingZeroBits64(cmask8__(a.data)) >> 2; }
+force_inline int    FirstFalse(i8x16 a)            { return CountTrailingZeroBits64(~cmask8__(a.data)) >> 2; }
 force_inline bool   IsTrue(i8x16 a, int i)         { return cmask8__(a.data) & ((uint64)1 << (i << 2)); }
 
 force_inline f32x4 ToFloat(i32x4 a)               { return vcvtq_f32_s32(a); }
diff --git a/uppsrc/Core/SIMD_SSE2.h b/uppsrc/Core/SIMD_SSE2.h
index 37387d793..cfd4dc2d4 100644
--- a/uppsrc/Core/SIMD_SSE2.h
+++ b/uppsrc/Core/SIMD_SSE2.h
@@ -41,6 +41,7 @@ force_inline bool   AllTrue(f32x4 a)              { return _mm_movemask_ps(a.dat
 force_inline bool   AnyTrue(f32x4 a)              { return _mm_movemask_ps(a.data); }
 force_inline int    CountTrue(f32x4 a)            { return CountBits(_mm_movemask_ps(a.data)); }
 force_inline int    FirstTrue(f32x4 a)            { return CountTrailingZeroBits(_mm_movemask_ps(a.data)); }
+force_inline int    FirstFalse(f32x4 a)           { return CountTrailingZeroBits(~_mm_movemask_ps(a.data)); }
 force_inline bool   IsTrue(f32x4 a, int i)        { return _mm_movemask_ps(a.data) & (1 << i); }
 
 force_inline f32x4 min(f32x4 a, f32x4 b)          { return _mm_min_ps(a.data, b.data); }
@@ -102,6 +103,7 @@ force_inline bool   AllTrue(i16x8 a)               { return _mm_movemask_epi8(a.
 force_inline bool   AnyTrue(i16x8 a)               { return _mm_movemask_epi8(a.data); }
 force_inline int    CountTrue(i16x8 a)             { return CountBits(_mm_movemask_epi8(a.data)) >> 1; }
 force_inline int    FirstTrue(i16x8 a)             { return CountTrailingZeroBits(_mm_movemask_epi8(a.data)) >> 1; }
+force_inline int    FirstFalse(i16x8 a)             { return CountTrailingZeroBits(~_mm_movemask_epi8(a.data)) >> 1; }
 force_inline int    IsTrue(i16x8 a, int i)         { return _mm_movemask_epi8(a.data) & (1 << 2 * i); }
 
 struct i32x4 : i16x8 { // 4xint32
@@ -140,6 +142,7 @@ force_inline bool   AllTrue(i32x4 a)               { return _mm_movemask_epi8(a.
 force_inline bool   AnyTrue(i32x4 a)               { return _mm_movemask_ps(_mm_castsi128_ps(a.data)); }
 force_inline int    CountTrue(i32x4 a)             { return CountBits(_mm_movemask_ps(_mm_castsi128_ps(a.data))); }
 force_inline int    FirstTrue(i32x4 a)             { return CountTrailingZeroBits(_mm_movemask_ps(_mm_castsi128_ps(a.data))); }
+force_inline int    FirstFalse(i32x4 a)            { return CountTrailingZeroBits(~_mm_movemask_ps(_mm_castsi128_ps(a.data))); }
 force_inline bool   IsTrue(i32x4 a, int i)         { return _mm_movemask_ps(_mm_castsi128_ps(a.data)) & (1 << i); }
 
 struct i8x16 : i16x8 { // 16xint8
@@ -172,7 +175,7 @@ force_inline i8x16  operator>(i8x16 a, i8x16 b)    { return _mm_cmpgt_epi8(a.dat
 force_inline bool   AllTrue(i8x16 a)               { return _mm_movemask_epi8(a.data) == 0xffff; }
 force_inline bool   AnyTrue(i8x16 a)                { return _mm_movemask_epi8(a.data); }
 force_inline int    CountTrue(i8x16 a)              { return CountBits(_mm_movemask_epi8(a.data)); }
-force_inline int    FirstTrue(i8x16 a)              { return CountTrailingZeroBits(_mm_movemask_epi8(a.data)); }
+force_inline int    FirstFalse(i8x16 a)             { return CountTrailingZeroBits(~_mm_movemask_epi8(a.data)); }
 force_inline bool   IsTrue(i8x16 a, int i)          { return _mm_movemask_epi8(a.data) & (1 << i); }
 
 force_inline f32x4 ToFloat(i32x4 a)               { return _mm_cvtepi32_ps(a.data); }