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radeonsi: Always pre-load separate VGPRs for centroid vs. center interpolation

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The LLVM R600 backend currently always uses separate VGPRs for these.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=68162
(Centroid interpolation is identical to center interpolation without
multisampling, so the shader hardware was only pre-loading one set of
interpolation coefficients, and the pixel shader code was using
uninitialized values as the centroid interpolation coefficients)

Cc: mesa-stable@lists.freedesktop.org
Tested-by: Laurent Carlier <lordheavym@gmail.com>
This commit is contained in:
Michel Dänzer 2013-08-19 15:45:32 +02:00 • committed by Michel Dänzer
parent 5edcb682c9
commit be301f707e
1 changed files with 2 additions and 1 deletions
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3
src/gallium/drivers/radeonsi/si_state_draw.c
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@ -183,7 +183,8 @@ static void si_pipe_shader_ps(struct pipe_context *ctx, struct si_pipe_shader *s
exports_ps = 2;
}
spi_ps_in_control = S_0286D8_NUM_INTERP(shader->shader.ninterp);
spi_ps_in_control = S_0286D8_NUM_INTERP(shader->shader.ninterp) |
S_0286D8_BC_OPTIMIZE_DISABLE(1);
si_pm4_set_reg(pm4, R_0286E0_SPI_BARYC_CNTL, spi_baryc_cntl);
spi_ps_input_ena = shader->spi_ps_input_ena;