nir/builder: Add a nir_imm_floatN_t helper

This lets you easily build float immediates just given the bit size.
If we have this single place here to handle this then it will be
easier to add support for 16-bit floats later.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

diff --git a/src/compiler/nir/nir_builder.h b/src/compiler/nir/nir_builder.h
index d699b5e..02a9dbf 100644 (file)
--- a/src/compiler/nir/nir_builder.h
+++ b/src/compiler/nir/nir_builder.h
@@ -228,6 +228,19 @@ nir_imm_double(nir_builder *build, double x)
 }
 
 static inline nir_ssa_def *
+nir_imm_floatN_t(nir_builder *build, double x, unsigned bit_size)
+{
+   switch (bit_size) {
+   case 32:
+      return nir_imm_float(build, x);
+   case 64:
+      return nir_imm_double(build, x);
+   }
+
+   unreachable("unknown float immediate bit size");
+}
+
+static inline nir_ssa_def *
 nir_imm_vec4(nir_builder *build, float x, float y, float z, float w)
 {
    nir_const_value v;