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intel: Implement abs, neg, and sat in the back-end 

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Jason Ekstrand 2019-05-06 11:16:25 -05:00
parent 4fde459563
commit 8ffbb54405
2 changed files with 44 additions and 9 deletions
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22
src/intel/compiler/brw_fs_nir.cpp
View File

@ -1112,6 +1112,28 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
inst->saturate = instr->dest.saturate;
break;
case nir_op_fsat:
inst = bld.MOV(result, op[0]);
inst->saturate = true;
break;
case nir_op_fneg:
case nir_op_ineg:
op[0].negate = true;
inst = bld.MOV(result, op[0]);
if (instr->op == nir_op_fneg)
inst->saturate = instr->dest.saturate;
break;
case nir_op_fabs:
case nir_op_iabs:
op[0].negate = false;
op[0].abs = true;
inst = bld.MOV(result, op[0]);
if (instr->op == nir_op_fabs)
inst->saturate = instr->dest.saturate;
break;
case nir_op_fsign:
emit_fsign(bld, instr, result, op, 0);
break;

31
src/intel/compiler/brw_vec4_nir.cpp
View File

@ -1123,6 +1123,28 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
emit_conversion_to_double(dst, op[0], instr->dest.saturate);
break;
case nir_op_fsat:
inst = emit(MOV(dst, op[0]));
inst->saturate = true;
break;
case nir_op_fneg:
case nir_op_ineg:
op[0].negate = true;
inst = emit(MOV(dst, op[0]));
if (instr->op == nir_op_fneg)
inst->saturate = instr->dest.saturate;
break;
case nir_op_fabs:
case nir_op_iabs:
op[0].negate = false;
op[0].abs = true;
inst = emit(MOV(dst, op[0]));
if (instr->op == nir_op_fabs)
inst->saturate = instr->dest.saturate;
break;
case nir_op_iadd:
assert(nir_dest_bit_size(instr->dest.dest) < 64);
/* fall through */
@ -1889,15 +1911,6 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
inst->saturate = instr->dest.saturate;
break;
case nir_op_iabs:
case nir_op_ineg:
assert(nir_dest_bit_size(instr->dest.dest) < 64);
/* fall through */
case nir_op_fabs:
case nir_op_fneg:
case nir_op_fsat:
unreachable("not reached: should be lowered by lower_source mods");
case nir_op_fdiv:
unreachable("not reached: should be lowered by DIV_TO_MUL_RCP in the compiler");