nir: Let nir_opt_algebraic rules contain unsigned constants > INT_MAX.

struct.pack('i', val) interprets `val` as a signed integer, and dies
if `val` > INT_MAX.  For larger constants, we need to use 'I' which
interprets it as an unsigned value.

This patch makes us use 'I' for all values >= 0, and 'i' for negative
values.  This should work in all cases.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/glsl/nir/nir_algebraic.py b/src/glsl/nir/nir_algebraic.py
index a30652f..14c0e82 100644 (file)
--- a/src/glsl/nir/nir_algebraic.py
+++ b/src/glsl/nir/nir_algebraic.py
@@ -108,7 +108,7 @@ class Constant(Value):
       if isinstance(self.value, (bool)):
          return 'NIR_TRUE' if self.value else 'NIR_FALSE'
       if isinstance(self.value, (int, long)):
-         return hex(struct.unpack('I', struct.pack('i', self.value))[0])
+         return hex(struct.unpack('I', struct.pack('i' if self.value < 0 else 'I', self.value))[0])
       elif isinstance(self.value, float):
          return hex(struct.unpack('I', struct.pack('f', self.value))[0])
       else: