Revert "Revert "implement SkScalar versions in terms of float versions""

This reverts commit 0e6db75eebab430e7f6665c8cfa1e7dcd2fef123.

Bug: skia:
Change-Id: I015d01efc58dfe03dae6bcc57c4b1102276e7566
Reviewed-on: https://skia-review.googlesource.com/127967
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/private/SkFloatBits.h b/include/private/SkFloatBits.h
index 2740a25d04..bae1542a31 100644
--- a/include/private/SkFloatBits.h
+++ b/include/private/SkFloatBits.h
@@ -56,6 +56,18 @@ static inline float SkBits2Float(int32_t floatAsBits) {
     return data.fFloat;
 }
 
+constexpr int32_t gFloatBits_exponent_mask = 0x7F800000;
+constexpr int32_t gFloatBits_matissa_mask  = 0x007FFFFF;
+
+static inline bool SkFloatBits_IsFinite(int32_t bits) {
+    return (bits & gFloatBits_exponent_mask) != gFloatBits_exponent_mask;
+}
+
+static inline bool SkFloatBits_IsInf(int32_t bits) {
+    return ((bits & gFloatBits_exponent_mask) == gFloatBits_exponent_mask) &&
+            (bits & gFloatBits_matissa_mask) == 0;
+}
+
 /** Return the float as a 2s compliment int. Just to be used to compare floats
     to each other or against positive float-bit-constants (like 0). This does
     not return the int equivalent of the float, just something cheaper for