Signed and unsigned integer packing and unpacking intrinsic functions
Implementation for packSnorm2x16, unpackSnorm2x16, packUnorm2x16 and
unpackUnorm2x16 intrinsic functions.
Change-Id: I6b9e2584c1aaad8011f026c217d8ad3f72e9ba45
Reviewed-on: https://swiftshader-review.googlesource.com/5053
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/Shader/ShaderCore.cpp b/src/Shader/ShaderCore.cpp
index d06dc9b..4f5af1a 100644
--- a/src/Shader/ShaderCore.cpp
+++ b/src/Shader/ShaderCore.cpp
@@ -1123,6 +1123,34 @@
Float4 tw = Min(Max((x.w - edge0.w) / (edge1.w - edge0.w), Float4(0.0f)), Float4(1.0f)); dst.w = tw * tw * (Float4(3.0f) - Float4(2.0f) * tw);
}
+ void ShaderCore::packSnorm2x16(Vector4f &d, const Vector4f &s0)
+ {
+ // round(clamp(c, -1.0, 1.0) * 32767.0)
+ d.x = As<Float4>((Int4(Round(Min(Max(s0.x, Float4(-1.0f)), Float4(1.0f)) * Float4(32767.0f))) & Int4(0xFFFF)) |
+ ((Int4(Round(Min(Max(s0.y, Float4(-1.0f)), Float4(1.0f)) * Float4(32767.0f))) & Int4(0xFFFF)) << 16));
+ }
+
+ void ShaderCore::packUnorm2x16(Vector4f &d, const Vector4f &s0)
+ {
+ // round(clamp(c, 0.0, 1.0) * 65535.0)
+ d.x = As<Float4>((Int4(Round(Min(Max(s0.x, Float4(0.0f)), Float4(1.0f)) * Float4(65535.0f))) & Int4(0xFFFF)) |
+ ((Int4(Round(Min(Max(s0.y, Float4(0.0f)), Float4(1.0f)) * Float4(65535.0f))) & Int4(0xFFFF)) << 16));
+ }
+
+ void ShaderCore::unpackSnorm2x16(Vector4f &dst, const Vector4f &s0)
+ {
+ // clamp(f / 32727.0, -1.0, 1.0)
+ dst.x = Min(Max(Float4(As<Int4>((As<UInt4>(s0.x) & UInt4(0x0000FFFF)) << 16)) * Float4(1.0f / float(0x7FFF0000)), Float4(-1.0f)), Float4(1.0f));
+ dst.y = Min(Max(Float4(As<Int4>(As<UInt4>(s0.x) & UInt4(0xFFFF0000))) * Float4(1.0f / float(0x7FFF0000)), Float4(-1.0f)), Float4(1.0f));
+ }
+
+ void ShaderCore::unpackUnorm2x16(Vector4f &dst, const Vector4f &s0)
+ {
+ // f / 65535.0
+ dst.x = Float4((As<UInt4>(s0.x) & UInt4(0x0000FFFF)) << 16) * Float4(1.0f / float(0xFFFF0000));
+ dst.y = Float4(As<UInt4>(s0.x) & UInt4(0xFFFF0000)) * Float4(1.0f / float(0xFFFF0000));
+ }
+
void ShaderCore::det2(Vector4f &dst, const Vector4f &src0, const Vector4f &src1)
{
dst.x = src0.x * src1.y - src0.y * src1.x;