Reverse order of float_4(float, float, float, float) and int32_4(int32_t, int32_t, int32_t, int32_t). Add simd::movemaskInverse().

include/simd/functions.hpp

@@ -186,6 +186,14 @@ inline float_4 sgn(float_4 x) {
 	return signbit | (nonzero & 1.f);
 }
 
+/** Given a mask `a`, returns a vector with each element either 0's or 1's depending on the mask bit. */
+template <typename T>
+inline T movemaskInverse(int a);
+
+template <>
+inline float_4 movemaskInverse<float_4>(int a) {
+	return float_4(a & (1 << 0), a & (1 << 1), a & (1 << 2), a & (1 << 3)) != float_4::zero();
+}
 
 } // namespace simd
 } // namespace rack

include/simd/vector.hpp

@@ -53,7 +53,7 @@ struct Vector<float, 4> {
 
 	/** Constructs a vector from four values. */
 	Vector(float x1, float x2, float x3, float x4) {
-		v = _mm_set_ps(x1, x2, x3, x4);
+		v = _mm_setr_ps(x1, x2, x3, x4);
 	}
 
 	/** Returns a vector initialized to zero. */
@@ -66,11 +66,6 @@ struct Vector<float, 4> {
     return _mm_castsi128_ps(_mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128()));
 	}
 
-	/** Constructs a vector from four values in reverse. */
-	static Vector setr(float x1, float x2, float x3, float x4) {
-		return Vector(_mm_setr_ps(x1, x2, x3, x4));
-	}
-
 	/** Reads an array of 4 values.
 	On little-endian machines (e.g. x86), the order is reversed, so `x[0]` corresponds to `vector.s[3]`.
 	*/
@@ -113,7 +108,7 @@ struct Vector<int32_t, 4> {
 		v = _mm_set1_epi32(x);
 	}
 	Vector(int32_t x1, int32_t x2, int32_t x3, int32_t x4) {
-		v = _mm_set_epi32(x1, x2, x3, x4);
+		v = _mm_setr_epi32(x1, x2, x3, x4);
 	}
 	static Vector zero() {
 		return Vector(_mm_setzero_si128());
@@ -121,9 +116,6 @@ struct Vector<int32_t, 4> {
 	static Vector mask() {
 		return Vector(_mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128()));
 	}
-	static Vector setr(int32_t x1, int32_t x2, int32_t x3, int32_t x4) {
-		return Vector(_mm_setr_epi32(x1, x2, x3, x4));
-	}
 	static Vector load(const int32_t *x) {
 		// HACK
 		// Use _mm_loadu_si128() because GCC doesn't support _mm_loadu_si32()