This is similar to the identically named fs_reg helper.
Cc: [email protected]
---
src/intel/compiler/brw_reg.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/src/intel/compiler/brw_reg.h b/src/intel/compiler/brw_reg.h
index d68d64f..9d63717 100644
--- a/src/intel/compiler/brw_reg.h
+++ b/src/intel/compiler/brw_reg.h
@@ -896,6 +896,22 @@ spread(struct brw_reg reg, unsigned s)
}
}
+/**
+ * Reinterpret each channel of register \p reg as a vector of values of the
+ * given smaller type and take the i-th subcomponent from each.
+ */
+static inline struct brw_reg
+subscript(struct brw_reg reg, enum brw_reg_type type, unsigned i)
+{
+ if (reg.file == IMM)
+ return reg;
+
+ unsigned scale = type_sz(reg.type) / type_sz(type);
+ assert(scale >= 1 && i < scale);
+
+ return suboffset(retype(spread(reg, scale), type), i);
+}
+
static inline struct brw_reg
vec16(struct brw_reg reg)
{
--
2.5.0.400.gff86faf
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