Simplify vmask4 mask() implementation for reference SIMD

camel-cdr · web-flow · commit b5b87efbf679 · 2025-03-09T21:28:08.000Z
diff --git a/Source/astcenc_vecmathlib_none_4.h b/Source/astcenc_vecmathlib_none_4.h
@@ -412,10 +412,10 @@ ASTCENC_SIMD_INLINE vmask4 operator~(vmask4 a)
  */
 ASTCENC_SIMD_INLINE unsigned int mask(vmask4 a)
 {
-	return ((a.m[0] >> 31) & 0x1) |
-	       ((a.m[1] >> 30) & 0x2) |
-	       ((a.m[2] >> 29) & 0x4) |
-	       ((a.m[3] >> 28) & 0x8);
+	return (a.m[0] & 0x1) |
+	       (a.m[1] & 0x2) |
+	       (a.m[2] & 0x4) |
+	       (a.m[3] & 0x8);
 }
 
 /**

Original file line number	Diff line number	Diff line change
`@@ -412,10 +412,10 @@ ASTCENC_SIMD_INLINE vmask4 operator~(vmask4 a)`
`412`	`412`	`*/`
`413`	`413`	`ASTCENC_SIMD_INLINE unsigned int mask(vmask4 a)`
`414`	`414`	`{`
`415`		`- return ((a.m[0] >> 31) & 0x1) \|`
`416`		`- ((a.m[1] >> 30) & 0x2) \|`
`417`		`- ((a.m[2] >> 29) & 0x4) \|`
`418`		`- ((a.m[3] >> 28) & 0x8);`
	`415`	`+ return (a.m[0] & 0x1) \|`
	`416`	`+ (a.m[1] & 0x2) \|`
	`417`	`+ (a.m[2] & 0x4) \|`
	`418`	`+ (a.m[3] & 0x8);`
`419`	`419`	`}`
`420`	`420`
`421`	`421`	`/**`