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11 * The above copyright notice and this permission notice (including the next
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25 #include "brw_compiler.h"
28 isl_lower_storage_image_format(const struct isl_device
*dev
,
29 enum isl_format format
)
32 /* These are never lowered. Up to BDW we'll have to fall back to untyped
33 * surface access for 128bpp formats.
35 case ISL_FORMAT_R32G32B32A32_UINT
:
36 case ISL_FORMAT_R32G32B32A32_SINT
:
37 case ISL_FORMAT_R32G32B32A32_FLOAT
:
38 case ISL_FORMAT_R32_UINT
:
39 case ISL_FORMAT_R32_SINT
:
40 case ISL_FORMAT_R32_FLOAT
:
43 /* From HSW to BDW the only 64bpp format supported for typed access is
44 * RGBA_UINT16. IVB falls back to untyped.
46 case ISL_FORMAT_R16G16B16A16_UINT
:
47 case ISL_FORMAT_R16G16B16A16_SINT
:
48 case ISL_FORMAT_R16G16B16A16_FLOAT
:
49 case ISL_FORMAT_R32G32_UINT
:
50 case ISL_FORMAT_R32G32_SINT
:
51 case ISL_FORMAT_R32G32_FLOAT
:
52 return (ISL_DEV_GEN(dev
) >= 9 ? format
:
53 ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
54 ISL_FORMAT_R16G16B16A16_UINT
:
55 ISL_FORMAT_R32G32_UINT
);
57 /* Up to BDW no SINT or FLOAT formats of less than 32 bits per component
58 * are supported. IVB doesn't support formats with more than one component
59 * for typed access. For 8 and 16 bpp formats IVB relies on the
60 * undocumented behavior that typed reads from R_UINT8 and R_UINT16
61 * surfaces actually do a 32-bit misaligned read. The alternative would be
62 * to use two surface state entries with different formats for each image,
63 * one for reading (using R_UINT32) and another one for writing (using
64 * R_UINT8 or R_UINT16), but that would complicate the shaders we generate
67 case ISL_FORMAT_R8G8B8A8_UINT
:
68 case ISL_FORMAT_R8G8B8A8_SINT
:
69 return (ISL_DEV_GEN(dev
) >= 9 ? format
:
70 ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
71 ISL_FORMAT_R8G8B8A8_UINT
: ISL_FORMAT_R32_UINT
);
73 case ISL_FORMAT_R16G16_UINT
:
74 case ISL_FORMAT_R16G16_SINT
:
75 case ISL_FORMAT_R16G16_FLOAT
:
76 return (ISL_DEV_GEN(dev
) >= 9 ? format
:
77 ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
78 ISL_FORMAT_R16G16_UINT
: ISL_FORMAT_R32_UINT
);
80 case ISL_FORMAT_R8G8_UINT
:
81 case ISL_FORMAT_R8G8_SINT
:
82 return (ISL_DEV_GEN(dev
) >= 9 ? format
:
83 ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
84 ISL_FORMAT_R8G8_UINT
: ISL_FORMAT_R16_UINT
);
86 case ISL_FORMAT_R16_UINT
:
87 case ISL_FORMAT_R16_FLOAT
:
88 case ISL_FORMAT_R16_SINT
:
89 return (ISL_DEV_GEN(dev
) >= 9 ? format
: ISL_FORMAT_R16_UINT
);
91 case ISL_FORMAT_R8_UINT
:
92 case ISL_FORMAT_R8_SINT
:
93 return (ISL_DEV_GEN(dev
) >= 9 ? format
: ISL_FORMAT_R8_UINT
);
95 /* Neither the 2/10/10/10 nor the 11/11/10 packed formats are supported
98 case ISL_FORMAT_R10G10B10A2_UINT
:
99 case ISL_FORMAT_R10G10B10A2_UNORM
:
100 case ISL_FORMAT_R11G11B10_FLOAT
:
101 return ISL_FORMAT_R32_UINT
;
103 /* No normalized fixed-point formats are supported by the hardware. */
104 case ISL_FORMAT_R16G16B16A16_UNORM
:
105 case ISL_FORMAT_R16G16B16A16_SNORM
:
106 return (ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
107 ISL_FORMAT_R16G16B16A16_UINT
:
108 ISL_FORMAT_R32G32_UINT
);
110 case ISL_FORMAT_R8G8B8A8_UNORM
:
111 case ISL_FORMAT_R8G8B8A8_SNORM
:
112 return (ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
113 ISL_FORMAT_R8G8B8A8_UINT
: ISL_FORMAT_R32_UINT
);
115 case ISL_FORMAT_R16G16_UNORM
:
116 case ISL_FORMAT_R16G16_SNORM
:
117 return (ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
118 ISL_FORMAT_R16G16_UINT
: ISL_FORMAT_R32_UINT
);
120 case ISL_FORMAT_R8G8_UNORM
:
121 case ISL_FORMAT_R8G8_SNORM
:
122 return (ISL_DEV_GEN(dev
) >= 8 || dev
->info
->is_haswell
?
123 ISL_FORMAT_R8G8_UINT
: ISL_FORMAT_R16_UINT
);
125 case ISL_FORMAT_R16_UNORM
:
126 case ISL_FORMAT_R16_SNORM
:
127 return ISL_FORMAT_R16_UINT
;
129 case ISL_FORMAT_R8_UNORM
:
130 case ISL_FORMAT_R8_SNORM
:
131 return ISL_FORMAT_R8_UINT
;
134 assert(!"Unknown image format");
135 return ISL_FORMAT_UNSUPPORTED
;