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ir_to_mesa: Fix binop_sqrt for multi-channel and negative source channels.

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Fixes glsl-fs-sqrt-branch.
This commit is contained in:
Eric Anholt
2010-06-28 13:01:49 -07:00
parent d5a5df45a4
commit 8f62ad6d0f
1 changed files with 4 additions and 1 deletions
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5
src/mesa/shader/ir_to_mesa.cpp
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@@ -706,7 +706,10 @@ ir_to_mesa_visitor::visit(ir_expression *ir)
break;
case ir_unop_sqrt:
ir_to_mesa_emit_scalar_op1(ir, OPCODE_RSQ, result_dst, op[0]);
ir_to_mesa_emit_op1(ir, OPCODE_RCP, result_dst, result_src);
ir_to_mesa_emit_scalar_op1(ir, OPCODE_RCP, result_dst, result_src);
/* For incoming channels < 0, set the result to 0. */
ir_to_mesa_emit_op3(ir, OPCODE_CMP, result_dst,
op[0], src_reg_for_float(0.0), result_src);
break;
case ir_unop_rsq:
ir_to_mesa_emit_scalar_op1(ir, OPCODE_RSQ, result_dst, op[0]);