amd/common: add ac_get_spi_shader_z_format()

ac_shader_util.c will contain shader helpers for RadeonSI
and RADV.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/Makefile.sources b/src/amd/Makefile.sources
index 1bc5a7fe7eb17938e158a01e60e3f97f6ba8a552..10c4827e19c9f2ffac7c2e22353dccbd78c86dbc 100644 (file)
--- a/src/amd/Makefile.sources
+++ b/src/amd/Makefile.sources
@@ -46,7 +46,10 @@ AMD_COMPILER_FILES = \
        common/ac_llvm_util.h \
        common/ac_shader_abi.h \
        common/ac_shader_info.c \
-       common/ac_shader_info.h
+       common/ac_shader_info.h \
+       common/ac_shader_util.c \
+       common/ac_shader_util.h
+
 
 AMD_NIR_FILES = \
        common/ac_nir_to_llvm.c \

diff --git a/src/amd/common/ac_shader_util.c b/src/amd/common/ac_shader_util.c
new file mode 100644 (file)
index 0000000..9d33a46
--- /dev/null
+++ b/src/amd/common/ac_shader_util.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2012 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "ac_shader_util.h"
+#include "sid.h"
+
+unsigned
+ac_get_spi_shader_z_format(bool writes_z, bool writes_stencil,
+                          bool writes_samplemask)
+{
+       if (writes_z) {
+               /* Z needs 32 bits. */
+               if (writes_samplemask)
+                       return V_028710_SPI_SHADER_32_ABGR;
+               else if (writes_stencil)
+                       return V_028710_SPI_SHADER_32_GR;
+               else
+                       return V_028710_SPI_SHADER_32_R;
+       } else if (writes_stencil || writes_samplemask) {
+               /* Both stencil and sample mask need only 16 bits. */
+               return V_028710_SPI_SHADER_UINT16_ABGR;
+       } else {
+               return V_028710_SPI_SHADER_ZERO;
+       }
+}

diff --git a/src/amd/common/ac_shader_util.h b/src/amd/common/ac_shader_util.h
new file mode 100644 (file)
index 0000000..1f971e7
--- /dev/null
+++ b/src/amd/common/ac_shader_util.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2012 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef AC_SHADER_UTIL_H
+#define AC_SHADER_UTIL_H
+
+#include <stdbool.h>
+
+unsigned
+ac_get_spi_shader_z_format(bool writes_z, bool writes_stencil,
+                          bool writes_samplemask);
+
+#endif

diff --git a/src/amd/common/meson.build b/src/amd/common/meson.build
index 8c526675c40d43555d9f401c1864436c844d2e55..63c1517543057a31839b667f9469a85e5119e8c3 100644 (file)
--- a/src/amd/common/meson.build
+++ b/src/amd/common/meson.build
@@ -38,6 +38,8 @@ amd_common_files = files(
   'ac_shader_abi.h',
   'ac_shader_info.c',
   'ac_shader_info.h',
+  'ac_shader_util.c',
+  'ac_shader_util.h',
   'ac_nir_to_llvm.c',
   'ac_nir_to_llvm.h',
   'ac_gpu_info.c',