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lima/ppir: don't lower vector {b,f}csel to scalar if condition is scalar

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Utgard PP has vector fcsel operation, but its condition is scalar. Add
filtering callback that checks whether {b,f}csel condition is not scalar
to lower {b,f}csel to scalar only in this case.

Reviewed-by: Qiang Yu <yuq825@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
This commit is contained in:
Vasily Khoruzhick
2019-08-29 21:28:36 -07:00
parent 9367d2ca37
commit 517b60dc13
1 changed files with 21 additions and 5 deletions
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26
src/gallium/drivers/lima/lima_program.c
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@@ -160,16 +160,32 @@ lima_alu_to_scalar_filter_cb(const nir_instr *instr, const void *data)
case nir_op_fsqrt:
case nir_op_fsin:
case nir_op_fcos:
/* nir vec4 fcsel assumes that each component of the condition will be
* used to select the same component from the two options, but lima
* can't implement that since we only have 1 component condition */
case nir_op_fcsel:
case nir_op_bcsel:
return true;
default:
break;
}
/* nir vec4 fcsel assumes that each component of the condition will be
* used to select the same component from the two options, but Utgard PP
* has only 1 component condition. If all condition components are not the
* same we need to lower it to scalar.
*/
switch (alu->op) {
case nir_op_bcsel:
case nir_op_fcsel:
break;
default:
return false;
}
int num_components = nir_dest_num_components(alu->dest.dest);
uint8_t swizzle = alu->src[0].swizzle[0];
for (int i = 1; i < num_components; i++)
if (alu->src[0].swizzle[i] != swizzle)
return true;
return false;
}