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pco: apply rounding mode to relevant conversion ops

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The rounding behaviour on [iu]2f32 ops needs to be explicitly set in
order to match the implicit behaviour described in the
KHR_shader_float_controls properties.

Fixes: e306abc6e6 ("pvr: implement KHR_shader_float_controls")
Signed-off-by: Simon Perretta <simon.perretta@imgtec.com>
Acked-by: Frank Binns <frank.binns@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37724>
This commit is contained in:
Simon Perretta 2025-09-29 14:55:41 +01:00
parent a89ab2993a
commit 34b4b35ca8
1 changed files with 7 additions and 2 deletions
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9
src/imagination/pco/pco_trans_nir.c
View file

@ -31,6 +31,7 @@ typedef struct _trans_ctx {
pco_builder b; /** Builder. */
mesa_shader_stage stage; /** Shader stage. */
enum pco_cf_node_flag flag; /** Implementation-defined control-flow flag. */
bool ftz32b;
bool olchk;
BITSET_WORD *float_types; /** NIR SSA float vars. */
@ -3299,14 +3300,16 @@ static pco_instr *trans_alu(trans_ctx *tctx, nir_alu_instr *alu)
instr = pco_unpck(&tctx->b,
dest,
pco_ref_elem(src[0], 0),
.pck_fmt = PCO_PCK_FMT_S32);
.pck_fmt = PCO_PCK_FMT_S32,
.roundzero = tctx->ftz32b);
break;
case nir_op_u2f32:
instr = pco_unpck(&tctx->b,
dest,
pco_ref_elem(src[0], 0),
.pck_fmt = PCO_PCK_FMT_U32);
.pck_fmt = PCO_PCK_FMT_U32,
.roundzero = tctx->ftz32b);
break;
case nir_op_fmin:
@ -3794,6 +3797,8 @@ pco_trans_nir(pco_ctx *ctx, nir_shader *nir, pco_data *data, void *mem_ctx)
.pco_ctx = ctx,
.shader = shader,
.stage = shader->stage,
.ftz32b =
nir_is_rounding_mode_rtz(nir->info.float_controls_execution_mode, 32),
};
if (shader->stage == MESA_SHADER_FRAGMENT)