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glsl: Remove silly OR(..., 0x0) from ldexp() lowering. 

I translated copysign(0.0f, x) a little too literally.

Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Matt Turner 2013-11-27 14:23:50 -08:00
parent b1eb2ad8d1
commit d79e711718
1 changed files with 1 additions and 3 deletions
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4
src/glsl/lower_instructions.cpp
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@ -383,7 +383,6 @@ lower_instructions_visitor::ldexp_to_arith(ir_expression *ir)
/* Constants */
ir_constant *zeroi = ir_constant::zero(ir, ivec);
ir_constant *zerof = ir_constant::zero(ir, ir->type);
ir_constant *sign_mantissa_mask = new(ir) ir_constant(0x807fffffu, vec_elem);
ir_constant *sign_mask = new(ir) ir_constant(0x80000000u, vec_elem);
@ -429,8 +428,7 @@ lower_instructions_visitor::ldexp_to_arith(ir_expression *ir)
*/
i.insert_before(zero_sign_x);
i.insert_before(assign(zero_sign_x,
bitcast_u2f(bit_or(bit_and(bitcast_f2u(x), sign_mask),
bitcast_f2u(zerof)))));
bitcast_u2f(bit_and(bitcast_f2u(x), sign_mask))));
i.insert_before(is_not_zero_or_underflow);
i.insert_before(assign(is_not_zero_or_underflow,