tgsi: implement ddiv opcode

softpipe (along with llvmpipe) claims to support arb_gpu_shader_fp64,
so we really need to support that opcode.

Cc: 17.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
(cherry picked from commit 3b575a955c1d84744a65160e2c45f0ce407effd8)
1 file changed