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aco: Implement scalar iadd_sat. 

Signed-off-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15421>
This commit is contained in:
Georg Lehmann 2021-12-24 15:12:17 +01:00 committed by Marge Bot
parent 989f2b1785
commit 50f585254c
2 changed files with 14 additions and 2 deletions
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15
src/amd/compiler/aco_instruction_selection.cpp
View File

@ -1902,7 +1902,20 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
}
case nir_op_iadd_sat: {
Temp src0 = get_alu_src(ctx, instr->src[0]);
Temp src1 = as_vgpr(ctx, get_alu_src(ctx, instr->src[1]));
Temp src1 = get_alu_src(ctx, instr->src[1]);
if (dst.regClass() == s1) {
Temp cond = bld.sopc(aco_opcode::s_cmp_lt_i32, bld.def(s1, scc), src1, Operand::zero());
Temp bound = bld.sop2(aco_opcode::s_add_u32, bld.def(s1), bld.scc(bld.def(s1, scc)),
Operand::c32(INT32_MAX), cond);
Temp overflow = bld.tmp(s1);
Temp add =
bld.sop2(aco_opcode::s_add_i32, bld.def(s1), bld.scc(Definition(overflow)), src0, src1);
bld.sop2(aco_opcode::s_cselect_b32, Definition(dst), bound, add, bld.scc(overflow));
break;
}
src1 = as_vgpr(ctx, src1);
if (dst.regClass() == v2b) {
Instruction* add_instr =
bld.vop3(aco_opcode::v_add_i16, Definition(dst), src0, src1).instr;

1
src/amd/compiler/aco_instruction_selection_setup.cpp
View File

@ -534,7 +534,6 @@ init_context(isel_context* ctx, nir_shader* shader)
case nir_op_cube_face_index_amd:
case nir_op_cube_face_coord_amd:
case nir_op_sad_u8x4:
case nir_op_iadd_sat:
case nir_op_udot_4x8_uadd:
case nir_op_sdot_4x8_iadd:
case nir_op_udot_4x8_uadd_sat: