fdo-mirrors/mesa
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/mesa/mesa.git synced 2025-12-24 19:40:10 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

aco: Reuse previous -1 result in find_msb to avoid using VOP3.

Browse source 
Totals:
CodeSize: 388934388 -> 388933712 (-0.00%)

Totals from 208 (0.15% of 134913) affected shaders:
CodeSize: 2008016 -> 2007340 (-0.03%)

Signed-off-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16011>
This commit is contained in:
Georg Lehmann 2021-12-31 17:38:25 +01:00 • committed by Marge Bot
parent ebb099a9b0
commit d12b5e7633
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/amd/compiler/aco_instruction_selection.cpp
View file

@ -1743,7 +1743,7 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
Temp msb = bld.tmp(v1);
Temp carry =
bld.vsub32(Definition(msb), Operand::c32(31u), Operand(msb_rev), true).def(1).getTemp();
bld.vop2_e64(aco_opcode::v_cndmask_b32, Definition(dst), msb, Operand::c32(-1), carry);
bld.vop2(aco_opcode::v_cndmask_b32, Definition(dst), msb, msb_rev, carry);
} else if (src.regClass() == v2) {
aco_opcode op =
instr->op == nir_op_ufind_msb ? aco_opcode::v_ffbh_u32 : aco_opcode::v_ffbh_i32;
@ -1761,7 +1761,7 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
Temp msb = bld.tmp(v1);
Temp carry =
bld.vsub32(Definition(msb), Operand::c32(63u), Operand(msb_rev), true).def(1).getTemp();
bld.vop2_e64(aco_opcode::v_cndmask_b32, Definition(dst), msb, Operand::c32(-1), carry);
bld.vop2(aco_opcode::v_cndmask_b32, Definition(dst), msb, msb_rev, carry);
} else {
isel_err(&instr->instr, "Unimplemented NIR instr bit size");
}