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glsl: Use _mesa_bitcount to implement constant ir_unop_bit_count

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Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Ian Romanick
2016-07-11 11:20:02 -07:00
parent f4af9f36e7
commit 4b0606e0a7
1 changed files with 2 additions and 9 deletions
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11
src/compiler/glsl/ir_constant_expression.cpp
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@@ -1500,15 +1500,8 @@ ir_expression::constant_expression_value(struct hash_table *variable_context)
break; break;
case ir_unop_bit_count: case ir_unop_bit_count:
for (unsigned c = 0; c < components; c++) { for (unsigned c = 0; c < components; c++)
unsigned count = 0; data.i[c] = _mesa_bitcount(op[0]->value.u[c]);
unsigned v = op[0]->value.u[c];
for (; v; count++) {
v &= v - 1;
}
data.u[c] = count;
}
break; break;
case ir_unop_find_msb: case ir_unop_find_msb: