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gallivm: add TGSI bit arithmetic opcodes support
Add TGSI_OPCODE_BFI, TGSI_OPCODE_POPC, TGSI_OPCODE_LSB, TGSI_OPCODE_IMSB, TGSI_OPCODE_UMSB, TGSI_OPCODE_IBFE, TGSI_OPCODE_UBFE, TGSI_OPCODE_BREV support. Reviewed-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Jan Zielinski <jan.zielinski@intel.com>
This commit is contained in:
Krzysztof Raszkowski
parent
008fe909ca
commit
cfe00a52f0
1 changed files with 138 additions and 0 deletions
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@ -2398,6 +2398,134 @@ u64shr_emit_cpu(
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emit_data->output[emit_data->chan] = lp_build_shr(uint_bld, emit_data->args[0],
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masked_count);
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}
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static void bfi_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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/*
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* def bfi(base, insert, offset, bits):
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* if offset < 0 or bits < 0 or offset + bits > 32:
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* return undefined
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* # << defined such that mask == ~0 when bits == 32, offset == 0
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* mask = ((1 << bits) - 1) << offset
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* return ((insert << offset) & mask) | (base & ~mask)
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*/
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struct lp_build_context *uint_bld = &bld_base->uint_bld;
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LLVMValueRef one_shl_bits_dec_one = lp_build_sub(
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uint_bld, lp_build_shl(uint_bld, uint_bld->one, emit_data->args[3]),
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uint_bld->one);
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LLVMValueRef mask =
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lp_build_shl(uint_bld, one_shl_bits_dec_one, emit_data->args[2]);
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LLVMValueRef insert_shl_offset =
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lp_build_shl(uint_bld, emit_data->args[1], emit_data->args[2]);
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LLVMValueRef insert_shl_offset_and_mask =
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lp_build_and(uint_bld, insert_shl_offset, mask);
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LLVMValueRef base_and_not_mask =
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lp_build_and(uint_bld, emit_data->args[0], lp_build_not(uint_bld, mask));
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emit_data->output[emit_data->chan] =
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lp_build_or(uint_bld, insert_shl_offset_and_mask, base_and_not_mask);
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}
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static void lsb_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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struct lp_build_context *uint_bld = &bld_base->int_bld;
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LLVMValueRef result = lp_build_cttz(uint_bld, emit_data->args[0]);
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LLVMValueRef cond =
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lp_build_cmp(uint_bld, PIPE_FUNC_LESS, result,
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lp_build_const_vec(uint_bld->gallivm, uint_bld->type, 32));
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emit_data->output[emit_data->chan] = lp_build_select(
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uint_bld, cond, result,
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lp_build_const_vec(uint_bld->gallivm, uint_bld->type, -1));
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}
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static void umsb_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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struct lp_build_context *uint_bld = &bld_base->int_bld;
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emit_data->output[emit_data->chan] = lp_build_sub(
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uint_bld, lp_build_const_vec(uint_bld->gallivm, uint_bld->type, 31),
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lp_build_ctlz(uint_bld, emit_data->args[0]));
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}
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static void imsb_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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struct lp_build_context *uint_bld = &bld_base->int_bld;
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LLVMValueRef cond =
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lp_build_cmp(uint_bld, PIPE_FUNC_LESS, emit_data->args[0],
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lp_build_const_vec(uint_bld->gallivm, uint_bld->type, 0));
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emit_data->args[0] = lp_build_select(
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uint_bld, cond, lp_build_not(uint_bld, emit_data->args[0]),
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emit_data->args[0]);
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umsb_emit_cpu(action, bld_base, emit_data);
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}
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static void popc_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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struct lp_build_context *uint_bld = &bld_base->int_bld;
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emit_data->output[emit_data->chan] =
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lp_build_popcount(uint_bld, emit_data->args[0]);
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}
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static void ibfe_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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/* def ibfe(value, offset, bits):
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* if offset < 0 or bits < 0 or offset + bits > 32:
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* return undefined
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* if bits == 0: return 0
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* # Note: >> sign-extends
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* return (value << (32 - offset - bits)) >> (32 - bits)
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*/
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struct lp_build_context *uint_bld = &bld_base->int_bld;
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LLVMValueRef r_32_sub_bits = lp_build_sub(
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uint_bld, lp_build_const_vec(uint_bld->gallivm, uint_bld->type, 32),
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emit_data->args[2]);
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LLVMValueRef temp1 =
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lp_build_sub(uint_bld, r_32_sub_bits, emit_data->args[1]);
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LLVMValueRef temp2 = lp_build_shl(uint_bld, emit_data->args[0], temp1);
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LLVMValueRef cond =
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lp_build_cmp(uint_bld, PIPE_FUNC_EQUAL, emit_data->args[2],
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lp_build_const_vec(uint_bld->gallivm, uint_bld->type, 0));
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emit_data->output[emit_data->chan] = lp_build_select(
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uint_bld, cond, lp_build_const_vec(uint_bld->gallivm, uint_bld->type, 0),
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lp_build_shr(uint_bld, temp2, r_32_sub_bits));
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}
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static void ubfe_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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/* def ubfe(value, offset, bits):
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* if offset < 0 or bits < 0 or offset + bits > 32:
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* return undefined
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* if bits == 0: return 0
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* # Note: >> does not sign-extend
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* return (value << (32 - offset - bits)) >> (32 - bits)
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*/
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struct lp_build_context *uint_bld = &bld_base->uint_bld;
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LLVMValueRef r_32_sub_bits = lp_build_sub(
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uint_bld, lp_build_const_vec(uint_bld->gallivm, uint_bld->type, 32),
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emit_data->args[2]);
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LLVMValueRef temp1 =
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lp_build_sub(uint_bld, r_32_sub_bits, emit_data->args[1]);
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LLVMValueRef temp2 = lp_build_shl(uint_bld, emit_data->args[0], temp1);
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emit_data->output[emit_data->chan] =
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lp_build_shr(uint_bld, temp2, r_32_sub_bits);
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}
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static void brev_emit_cpu(const struct lp_build_tgsi_action *action,
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struct lp_build_tgsi_context *bld_base,
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struct lp_build_emit_data *emit_data) {
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struct lp_build_context *uint_bld = &bld_base->uint_bld;
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emit_data->output[emit_data->chan] =
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lp_build_bitfield_reverse(uint_bld, emit_data->args[0]);
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}
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void
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lp_set_default_actions_cpu(
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@ -2507,4 +2635,14 @@ lp_set_default_actions_cpu(
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bld_base->op_actions[TGSI_OPCODE_U64SHL].emit = u64shl_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_I64SHR].emit = i64shr_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_U64SHR].emit = u64shr_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_BFI].emit = bfi_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_POPC].emit = popc_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_LSB].emit = lsb_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_IMSB].emit = imsb_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_UMSB].emit = umsb_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_IBFE].emit = ibfe_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_UBFE].emit = ubfe_emit_cpu;
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bld_base->op_actions[TGSI_OPCODE_BREV].emit = brev_emit_cpu;
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}
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