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drm/i915: Avoid using another unpreserved temporary

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As we may load from a sampler, we can not use on of the unpreserved
temporaries to store the intermediate colour result.
This commit is contained in:
Chris Wilson 2010-03-15 18:23:23 +00:00
parent 26f963557b
commit 2a98d0586c
1 changed files with 15 additions and 11 deletions
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26
src/drm/cairo-drm-i915-shader.c
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@ -925,18 +925,22 @@ i915_set_shader_program (i915_device_t *device,
} else {
out_reg = FS_OC;
if (shader->content == CAIRO_CONTENT_ALPHA)
out_reg = FS_U0;
out_reg = FS_R3;
i915_fs_mov (out_reg,
i915_fs_operand_reg_pure (mask_reg, source_pure));
source_reg = out_reg;
}
} else if (mask_reg) {
out_reg = FS_OC;
if (shader->content == CAIRO_CONTENT_ALPHA)
out_reg = FS_U0;
i915_fs_mul (out_reg,
i915_fs_operand_reg (source_reg),
i915_fs_operand (mask_reg, W, W, W, W));
if ((shader->content & CAIRO_CONTENT_COLOR) == 0) {
i915_fs_mul (out_reg,
i915_fs_operand (source_reg, W, W, W, W),
i915_fs_operand (mask_reg, W, W, W, W));
} else {
i915_fs_mul (out_reg,
i915_fs_operand_reg (source_reg),
i915_fs_operand (mask_reg, W, W, W, W));
}
source_reg = out_reg;
}
@ -944,14 +948,14 @@ i915_set_shader_program (i915_device_t *device,
/* (source OP dest) LERP_clip dest */
if (source_reg == ~0U) {
if (source_pure == 0) {
i915_fs_mov (FS_U0,
i915_fs_mov (FS_R3,
i915_fs_operand (mask_reg, W, W, W, W));
} else {
i915_fs_mov (FS_U0,
i915_fs_mov (FS_R3,
i915_fs_operand_impure (mask_reg, W, source_pure));
}
} else {
i915_fs_mul (FS_U0,
i915_fs_mul (FS_R3,
i915_fs_operand_reg (source_reg),
i915_fs_operand (mask_reg, W, W, W, W));
}
@ -978,9 +982,9 @@ i915_set_shader_program (i915_device_t *device,
source_reg = FS_OC;
if (shader->content != CAIRO_CONTENT_COLOR_ALPHA)
source_reg = FS_U0;
source_reg = FS_R3;
i915_fs_add (source_reg,
i915_fs_operand_reg (FS_U0),
i915_fs_operand_reg (FS_R3),
i915_fs_operand_reg (mask_reg));
}
}