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st/nine: Implement relative addressing for ps inputs

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To implement the feature we copy the ps inputs to a temp array.
This is not optimal for performance, but it is the simplest solution.

This is a feature that is very very rarely used.

Signed-off-by: Axel Davy <axel.davy@ens.fr>
This commit is contained in:
Axel Davy 2016-06-12 22:20:21 +02:00
parent a5d308e51a
commit 03f60a3357
1 changed files with 27 additions and 3 deletions
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30
src/gallium/state_trackers/nine/nine_shader.c
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@ -477,6 +477,7 @@ struct shader_translator
struct ureg_dst o[PIPE_MAX_SHADER_OUTPUTS];
struct ureg_dst oDepth;
struct ureg_src v[PIPE_MAX_SHADER_INPUTS];
struct ureg_src v_consecutive; /* copy in temp array of ps inputs for rel addressing */
struct ureg_src vPos;
struct ureg_src vFace;
struct ureg_src s;
@ -894,9 +895,32 @@ tx_src_param(struct shader_translator *tx, const struct sm1_src_param *param)
TGSI_INTERPOLATE_LOC_CENTROID : 0,
0, 1);
} else {
assert(!param->rel); /* TODO */
assert(param->idx < ARRAY_SIZE(tx->regs.v));
src = tx->regs.v[param->idx];
if(param->rel) {
/* Copy all inputs (non consecutive)
* to temp array (consecutive).
* This is not good for performance.
* A better way would be to have inputs
* consecutive (would need implement alternative
* way to match vs outputs and ps inputs).
* However even with the better way, the temp array
* copy would need to be used if some inputs
* are not GENERIC or if they have different
* interpolation flag. */
if (ureg_src_is_undef(tx->regs.v_consecutive)) {
int i;
tx->regs.v_consecutive = ureg_src(ureg_DECL_array_temporary(ureg, 10, 0));
for (i = 0; i < 10; i++) {
if (!ureg_src_is_undef(tx->regs.v[i]))
ureg_MOV(ureg, ureg_dst_array_offset(ureg_dst(tx->regs.v_consecutive), i), tx->regs.v[i]);
else
ureg_MOV(ureg, ureg_dst_array_offset(ureg_dst(tx->regs.v_consecutive), i), ureg_imm4f(ureg, 0.0f, 0.0f, 0.0f, 1.0f));
}
}
src = ureg_src_array_offset(tx->regs.v_consecutive, param->idx);
} else {
assert(param->idx < ARRAY_SIZE(tx->regs.v));
src = tx->regs.v[param->idx];
}
}
}
break;