pan/bi: Don't gobble zero ports
In case we've reading/writing R0. Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4458>
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@ -363,12 +363,15 @@ bi_pack_registers(struct bi_registers regs)
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}
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/* When port 3 isn't used, we have to set it to port 2, and vice versa,
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* or we an INSTR_INVALID_ENC is raised. The reason is unknown. */
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* or INSTR_INVALID_ENC is raised. The reason is unknown. */
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if (!regs.port[3])
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bool has_port2 = regs.write_fma || regs.write_add;
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bool has_port3 = regs.read_port3 || (regs.write_fma && regs.write_add);
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if (!has_port3)
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regs.port[3] = regs.port[2];
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if (!regs.port[2])
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if (!has_port2)
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regs.port[2] = regs.port[3];
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s.reg3 = regs.port[3];
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