restore old constants; fix min val

Author: frasercrmck

libclc/clc/lib/generic/geometric/clc_normalize.inc

@@ -1,5 +1,6 @@
 //===----------------------------------------------------------------------===//
 //
+
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
@@ -27,11 +28,25 @@ _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_normalize(__CLC_GENTYPE p) {
 #else
 
 #if __CLC_FPSIZE == 32
+
+#define MIN_VAL FLT_MIN
 #define MAX_SQRT 0x1.0p+86F
+#if __CLC_VECSIZE_OR_1 == 2
 #define MIN_SQRT 0x1.0p-65F
+#else
+#define MIN_SQRT 0x1.0p-66F
+#endif
+
 #elif __CLC_FPSIZE == 64
+
+#define MIN_VAL DBL_MIN
 #define MAX_SQRT 0x1.0p+563
+#if __CLC_VECSIZE_OR_1 == 2
 #define MIN_SQRT 0x1.0p-513
+#else
+#define MIN_SQRT 0x1.0p-514
+#endif
+
 #else
 #error "Invalid FP size"
 #endif
@@ -43,7 +58,7 @@ _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_normalize(__CLC_GENTYPE p) {
 
   __CLC_SCALAR_GENTYPE l2 = __clc_dot(p, p);
 
-  if (l2 < FLT_MIN) {
+  if (l2 < MIN_VAL) {
     p *= MAX_SQRT;
     l2 = __clc_dot(p, p);
   } else if (l2 == INFINITY) {
@@ -60,6 +75,7 @@ _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __clc_normalize(__CLC_GENTYPE p) {
   return p * __clc_rsqrt(l2);
 }
 
+#undef MIN_VAL
 #undef MIN_SQRT
 #undef MAX_SQRT