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aco/spill: Use scratch stack pointer

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35031>
This commit is contained in:
Natalie Vock 2025-02-17 18:42:48 +01:00 • committed by Marge Bot
parent 22624d6f12
commit cd2caa5e2b
1 changed files with 8 additions and 2 deletions
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10
src/amd/compiler/aco_spill.cpp
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@ -1245,7 +1245,12 @@ setup_vgpr_spill_reload(spill_ctx& ctx, Block& block,
}
/* GFX9+ uses scratch_* instructions, which don't use a resource. */
ctx.scratch_rsrc = offset_bld.copy(offset_bld.def(s1), Operand::c32(saddr));
if (ctx.program->stack_ptr.id())
ctx.scratch_rsrc =
offset_bld.sop2(aco_opcode::s_add_u32, offset_bld.def(s1), Definition(scc, s1),
Operand(ctx.program->stack_ptr), Operand::c32(saddr));
else
ctx.scratch_rsrc = offset_bld.copy(offset_bld.def(s1), Operand::c32(saddr));
}
} else {
if (ctx.scratch_rsrc == Temp())
@ -1690,7 +1695,8 @@ spill(Program* program)
/* add extra SGPRs required for spilling VGPRs */
if (demand.vgpr + extra_vgprs > limit.vgpr) {
if (program->gfx_level >= GFX9)
extra_sgprs = 1; /* SADDR */
extra_sgprs =
program->stack_ptr.id() ? 2 : 1; /* SADDR + scc for stack pointer additions */
else
extra_sgprs = 5; /* scratch_resource (s4) + scratch_offset (s1) */
if (demand.sgpr + extra_sgprs > limit.sgpr) {