[Piglit] [PATCH 2/3] CL: Fix up erf tests

[Jan Vesely]

On Mon, 2017-01-16 at 20:03 -0600, Aaron Watry wrote:
> erf(11.1) was completely wrong.
> 
> Tested with clover/libclc on PITCAIRN and Beignet on haswell.
> 
> This prevents regressions if/when the piglit ULP calculation is ever fixed.

I think these should use math.erfc and math.erf (1 and 2 respectively),
but the numbers look OK now, and they weren't using it before.

for patches 1 and 2
Reviewed-by: Jan Vesely <jan.vesely at rutgers.edu>

> 
> Signed-off-by: Aaron Watry <awatry at gmail.com>
> ---
>  generated_tests/gen_cl_math_builtins.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/generated_tests/gen_cl_math_builtins.py b/generated_tests/gen_cl_math_builtins.py
> index a14d97b..e9cfebf 100644
> --- a/generated_tests/gen_cl_math_builtins.py
> +++ b/generated_tests/gen_cl_math_builtins.py
> @@ -243,7 +243,7 @@ tests = {
>          'arg_types' : [F, F],
>          'function_type': 'ttt',
>          'values' : [
> -            [0.0, 0.950004,        0.990005,        -0.994999475,  0.27219439321703e-29, 1, -1], # Result
> +            [0.0, 0.950004,        0.990005,        -0.994999475,      1, 1, -1], # Result
>              [0.0, 1.960/sqrt(2.0), 2.576/sqrt(2.0), -2.807/sqrt(2.0), 11.1, float("inf"), float("-inf")]  # Arg0
>          ],
>          'tolerance' : 16
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