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-rw-r--r--src/core/SkNx.h92
1 files changed, 49 insertions, 43 deletions
diff --git a/src/core/SkNx.h b/src/core/SkNx.h
index dadb3ec132..1342266b93 100644
--- a/src/core/SkNx.h
+++ b/src/core/SkNx.h
@@ -26,6 +26,22 @@ namespace {
// The default implementations just fall back on a pair of size N/2.
+// SkNb is a _very_ minimal class representing a vector of bools returned by comparison operators.
+// We pass along the byte size of the compared types (Bytes) to help platform specializations.
+template <int N, int Bytes>
+class SkNb {
+public:
+ SkNb() {}
+ SkNb(const SkNb<N/2, Bytes>& lo, const SkNb<N/2, Bytes>& hi) : fLo(lo), fHi(hi) {}
+
+ bool allTrue() const { return fLo.allTrue() && fHi.allTrue(); }
+ bool anyTrue() const { return fLo.anyTrue() || fHi.anyTrue(); }
+
+protected:
+ REQUIRE(0 == (N & (N-1)));
+ SkNb<N/2, Bytes> fLo, fHi;
+};
+
template <int N, typename T>
class SkNi {
public:
@@ -62,19 +78,14 @@ public:
static SkNi Min(const SkNi& a, const SkNi& b) {
return SkNi(SkNi<N/2, T>::Min(a.fLo, b.fLo), SkNi<N/2, T>::Min(a.fHi, b.fHi));
}
- SkNi operator < (const SkNi& o) const { return SkNi(fLo < o.fLo, fHi < o.fHi); }
+
+ // TODO: comparisons, max?
template <int k> T kth() const {
SkASSERT(0 <= k && k < N);
return k < N/2 ? fLo.template kth<k>() : fHi.template kth<k-N/2>();
}
- bool allTrue() const { return fLo.allTrue() && fHi.allTrue(); }
- bool anyTrue() const { return fLo.anyTrue() || fHi.anyTrue(); }
- SkNi thenElse(const SkNi& t, const SkNi& e) const {
- return SkNi(fLo.thenElse(t.fLo, e.fLo), fHi.thenElse(t.fHi, e.fHi));
- }
-
protected:
REQUIRE(0 == (N & (N-1)));
@@ -83,9 +94,11 @@ protected:
template <int N, typename T>
class SkNf {
+ typedef SkNb<N, sizeof(T)> Nb;
+
static int32_t MyNi(float);
static int64_t MyNi(double);
- typedef decltype(MyNi(T())) I;
+ typedef SkNi<N, decltype(MyNi(T()))> Ni;
public:
SkNf() {}
explicit SkNf(T val) : fLo(val), fHi(val) {}
@@ -102,19 +115,19 @@ public:
fHi.store(vals+N/2);
}
- SkNi<N,I> castTrunc() const { return SkNi<N,I>(fLo.castTrunc(), fHi.castTrunc()); }
+ Ni castTrunc() const { return Ni(fLo.castTrunc(), fHi.castTrunc()); }
SkNf operator + (const SkNf& o) const { return SkNf(fLo + o.fLo, fHi + o.fHi); }
SkNf operator - (const SkNf& o) const { return SkNf(fLo - o.fLo, fHi - o.fHi); }
SkNf operator * (const SkNf& o) const { return SkNf(fLo * o.fLo, fHi * o.fHi); }
SkNf operator / (const SkNf& o) const { return SkNf(fLo / o.fLo, fHi / o.fHi); }
- SkNf operator == (const SkNf& o) const { return SkNf(fLo == o.fLo, fHi == o.fHi); }
- SkNf operator != (const SkNf& o) const { return SkNf(fLo != o.fLo, fHi != o.fHi); }
- SkNf operator < (const SkNf& o) const { return SkNf(fLo < o.fLo, fHi < o.fHi); }
- SkNf operator > (const SkNf& o) const { return SkNf(fLo > o.fLo, fHi > o.fHi); }
- SkNf operator <= (const SkNf& o) const { return SkNf(fLo <= o.fLo, fHi <= o.fHi); }
- SkNf operator >= (const SkNf& o) const { return SkNf(fLo >= o.fLo, fHi >= o.fHi); }
+ Nb operator == (const SkNf& o) const { return Nb(fLo == o.fLo, fHi == o.fHi); }
+ Nb operator != (const SkNf& o) const { return Nb(fLo != o.fLo, fHi != o.fHi); }
+ Nb operator < (const SkNf& o) const { return Nb(fLo < o.fLo, fHi < o.fHi); }
+ Nb operator > (const SkNf& o) const { return Nb(fLo > o.fLo, fHi > o.fHi); }
+ Nb operator <= (const SkNf& o) const { return Nb(fLo <= o.fLo, fHi <= o.fHi); }
+ Nb operator >= (const SkNf& o) const { return Nb(fLo >= o.fLo, fHi >= o.fHi); }
static SkNf Min(const SkNf& l, const SkNf& r) {
return SkNf(SkNf<N/2,T>::Min(l.fLo, r.fLo), SkNf<N/2,T>::Min(l.fHi, r.fHi));
@@ -138,12 +151,6 @@ public:
return k < N/2 ? fLo.template kth<k>() : fHi.template kth<k-N/2>();
}
- bool allTrue() const { return fLo.allTrue() && fHi.allTrue(); }
- bool anyTrue() const { return fLo.anyTrue() || fHi.anyTrue(); }
- SkNf thenElse(const SkNf& t, const SkNf& e) const {
- return SkNf(fLo.thenElse(t.fLo, t.fHi), fHi.thenElse(t.fLo, t.fHi));
- }
-
protected:
REQUIRE(0 == (N & (N-1)));
SkNf(const SkNf<N/2, T>& lo, const SkNf<N/2, T>& hi) : fLo(lo), fHi(hi) {}
@@ -154,6 +161,17 @@ protected:
// Bottom out the default implementations with scalars when nothing's been specialized.
+template <int Bytes>
+class SkNb<1, Bytes> {
+public:
+ SkNb() {}
+ explicit SkNb(bool val) : fVal(val) {}
+ bool allTrue() const { return fVal; }
+ bool anyTrue() const { return fVal; }
+protected:
+ bool fVal;
+};
+
template <typename T>
class SkNi<1,T> {
public:
@@ -177,26 +195,23 @@ public:
SkNi operator >> (int bits) const { return SkNi(fVal >> bits); }
static SkNi Min(const SkNi& a, const SkNi& b) { return SkNi(SkTMin(a.fVal, b.fVal)); }
- SkNi operator <(const SkNi& o) const { return SkNi(fVal < o.fVal); }
template <int k> T kth() const {
SkASSERT(0 == k);
return fVal;
}
- bool allTrue() const { return fVal; }
- bool anyTrue() const { return fVal; }
- SkNi thenElse(const SkNi& t, const SkNi& e) const { return fVal ? t : e; }
-
protected:
T fVal;
};
template <typename T>
class SkNf<1,T> {
+ typedef SkNb<1, sizeof(T)> Nb;
+
static int32_t MyNi(float);
static int64_t MyNi(double);
- typedef decltype(MyNi(T())) I;
+ typedef SkNi<1, decltype(MyNi(T()))> Ni;
public:
SkNf() {}
explicit SkNf(T val) : fVal(val) {}
@@ -204,19 +219,19 @@ public:
void store(T vals[1]) const { vals[0] = fVal; }
- SkNi<1,I> castTrunc() const { return SkNi<1,I>(fVal); }
+ Ni castTrunc() const { return Ni(fVal); }
SkNf operator + (const SkNf& o) const { return SkNf(fVal + o.fVal); }
SkNf operator - (const SkNf& o) const { return SkNf(fVal - o.fVal); }
SkNf operator * (const SkNf& o) const { return SkNf(fVal * o.fVal); }
SkNf operator / (const SkNf& o) const { return SkNf(fVal / o.fVal); }
- SkNf operator == (const SkNf& o) const { return SkNf(fVal == o.fVal); }
- SkNf operator != (const SkNf& o) const { return SkNf(fVal != o.fVal); }
- SkNf operator < (const SkNf& o) const { return SkNf(fVal < o.fVal); }
- SkNf operator > (const SkNf& o) const { return SkNf(fVal > o.fVal); }
- SkNf operator <= (const SkNf& o) const { return SkNf(fVal <= o.fVal); }
- SkNf operator >= (const SkNf& o) const { return SkNf(fVal >= o.fVal); }
+ Nb operator == (const SkNf& o) const { return Nb(fVal == o.fVal); }
+ Nb operator != (const SkNf& o) const { return Nb(fVal != o.fVal); }
+ Nb operator < (const SkNf& o) const { return Nb(fVal < o.fVal); }
+ Nb operator > (const SkNf& o) const { return Nb(fVal > o.fVal); }
+ Nb operator <= (const SkNf& o) const { return Nb(fVal <= o.fVal); }
+ Nb operator >= (const SkNf& o) const { return Nb(fVal >= o.fVal); }
static SkNf Min(const SkNf& l, const SkNf& r) { return SkNf(SkTMin(l.fVal, r.fVal)); }
static SkNf Max(const SkNf& l, const SkNf& r) { return SkNf(SkTMax(l.fVal, r.fVal)); }
@@ -234,21 +249,12 @@ public:
return fVal;
}
- bool allTrue() const { return this->pun(); }
- bool anyTrue() const { return this->pun(); }
- SkNf thenElse(const SkNf& t, const SkNf& e) const { return this->pun() ? t : e; }
-
protected:
// We do double sqrts natively, or via floats for any other type.
template <typename U>
static U Sqrt(U val) { return (U) ::sqrtf((float)val); }
static double Sqrt(double val) { return ::sqrt ( val); }
- I pun() const {
- union { T f; I i; } pun = { fVal };
- return pun.i;
- }
-
T fVal;
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 14:15:03 +0000