nir/builder: Add bany_inequal and bany helpers.

The first simply picks the bany_inequal[234] opcodes based on the SSA
def's number of components.  The latter implicitly compares with zero
to achieve the same semantics of GLSL's any().

Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>

diff --git a/src/compiler/nir/nir_builder.h b/src/compiler/nir/nir_builder.h
index 435582a..affa29c 100644 (file)
--- a/src/compiler/nir/nir_builder.h
+++ b/src/compiler/nir/nir_builder.h
@@ -318,6 +318,25 @@ nir_fdot(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1)
 }
 
 static inline nir_ssa_def *
+nir_bany_inequal(nir_builder *b, nir_ssa_def *src0, nir_ssa_def *src1)
+{
+   switch (src0->num_components) {
+   case 1: return nir_ine(b, src0, src1);
+   case 2: return nir_bany_inequal2(b, src0, src1);
+   case 3: return nir_bany_inequal3(b, src0, src1);
+   case 4: return nir_bany_inequal4(b, src0, src1);
+   default:
+      unreachable("bad component size");
+   }
+}
+
+static inline nir_ssa_def *
+nir_bany(nir_builder *b, nir_ssa_def *src)
+{
+   return nir_bany_inequal(b, src, nir_imm_int(b, 0));
+}
+
+static inline nir_ssa_def *
 nir_channel(nir_builder *b, nir_ssa_def *def, unsigned c)
 {
    unsigned swizzle[4] = {c, c, c, c};