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aco/ngg: Put shader query reduction operand into a VGPR. 

The p_reduce instruction only works if this operand is in a VGPR,
and otherwise gets lowered to incorrect code.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7232>
This commit is contained in:
Timur Kristóf 2020-10-14 17:23:15 +02:00
parent 9757c3cb6b
commit 260f9c503a
1 changed files with 2 additions and 0 deletions
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2
src/amd/compiler/aco_instruction_selection.cpp
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@ -11342,6 +11342,8 @@ void ngg_gs_write_shader_query(isel_context *ctx, nir_intrinsic_instr *instr)
Temp prm_cnt = gs_vtx_cnt;
if (total_vtx_per_prim > 1)
prm_cnt = bld.vop3(aco_opcode::v_mad_i32_i24, bld.def(v1), gs_prm_cnt, Operand(-1u * (total_vtx_per_prim - 1)), gs_vtx_cnt);
else
prm_cnt = as_vgpr(ctx, prm_cnt);
/* Reduction calculates the primitive count for the entire subgroup. */
sg_prm_cnt = bld.tmp(s1);