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nir/range_analysis: look through f2f

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Foz-DB Navi31:
Totals from 93 (0.12% of 80273) affected shaders:
Instrs: 123927 -> 121073 (-2.30%); split: -2.30%, +0.00%
CodeSize: 670832 -> 653332 (-2.61%); split: -2.61%, +0.00%
Latency: 337678 -> 322803 (-4.41%); split: -4.41%, +0.00%
InvThroughput: 63277 -> 61083 (-3.47%)
VClause: 460 -> 373 (-18.91%)
SClause: 2178 -> 2100 (-3.58%)
Copies: 7637 -> 7744 (+1.40%)
PreSGPRs: 4414 -> 4287 (-2.88%)
PreVGPRs: 4229 -> 4230 (+0.02%)
VALU: 77375 -> 75693 (-2.17%)
SALU: 16497 -> 16383 (-0.69%); split: -0.73%, +0.04%
VMEM: 561 -> 477 (-14.97%)
SMEM: 3197 -> 3113 (-2.63%)

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36468>
This commit is contained in:
Georg Lehmann
2025-07-30 15:04:06 +02:00
committed by Marge Bot
parent 261239a492
commit caf89c97de
1 changed files with 31 additions and 0 deletions
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src/compiler/nir/nir_range_analysis.c
+31
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@@ -640,6 +640,11 @@ process_fp_query(struct analysis_state *state, struct analysis_query *aq, uint32
case nir_op_fceil:
case nir_op_ftrunc:
case nir_op_ffract:
case nir_op_f2f16:
case nir_op_f2f16_rtz:
case nir_op_f2f16_rtne:
case nir_op_f2f32:
case nir_op_f2f64:
case nir_op_fdot2:
case nir_op_fdot3:
case nir_op_fdot4:
@@ -823,6 +828,32 @@ process_fp_query(struct analysis_state *state, struct analysis_query *aq, uint32
break;
case nir_op_f2f16:
case nir_op_f2f16_rtz:
case nir_op_f2f16_rtne:
case nir_op_f2f32:
case nir_op_f2f64: {
r = unpack_data(src_res[0]);
bool rtz = alu->op == nir_op_f2f16_rtz;
if (alu->op != nir_op_f2f16_rtne && alu->op != nir_op_f2f16_rtz) {
nir_shader *shader = nir_cf_node_get_function(&alu->instr.block->cf_node)->function->shader;
unsigned execution_mode = shader->info.float_controls_execution_mode;
rtz = nir_is_rounding_mode_rtz(execution_mode, alu->def.bit_size);
}
if (alu->src[0].src.ssa->bit_size > alu->def.bit_size) {
/* Unless we are rounding towards zero, large values can create Inf. */
if (!rtz && r.range != eq_zero)
r.is_finite = false;
/* Underflow can create new zeros. */
r.range = union_ranges(r.range, eq_zero);
}
break;
}
case nir_op_fabs:
r = unpack_data(src_res[0]);