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-rw-r--r--src/mesa/pipe/tgsi/util/tgsi_util.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/src/mesa/pipe/tgsi/util/tgsi_util.c b/src/mesa/pipe/tgsi/util/tgsi_util.c
new file mode 100644
index 0000000000..1e76b0f133
--- /dev/null
+++ b/src/mesa/pipe/tgsi/util/tgsi_util.c
@@ -0,0 +1,273 @@
+#include "pipe/p_util.h"
+#include "pipe/p_shader_tokens.h"
+#include "tgsi_parse.h"
+#include "tgsi_build.h"
+#include "tgsi_util.h"
+
+union pointer_hack
+{
+ void *pointer;
+ unsigned long long uint64;
+};
+
+void *
+tgsi_align_128bit(
+ void *unaligned )
+{
+ union pointer_hack ph;
+
+ ph.uint64 = 0;
+ ph.pointer = unaligned;
+ ph.uint64 = (ph.uint64 + 15) & ~15;
+ return ph.pointer;
+}
+
+unsigned
+tgsi_util_get_src_register_swizzle(
+ const struct tgsi_src_register *reg,
+ unsigned component )
+{
+ switch( component ) {
+ case 0:
+ return reg->SwizzleX;
+ case 1:
+ return reg->SwizzleY;
+ case 2:
+ return reg->SwizzleZ;
+ case 3:
+ return reg->SwizzleW;
+ default:
+ assert( 0 );
+ }
+ return 0;
+}
+
+unsigned
+tgsi_util_get_src_register_extswizzle(
+ const struct tgsi_src_register_ext_swz *reg,
+ unsigned component )
+{
+ switch( component ) {
+ case 0:
+ return reg->ExtSwizzleX;
+ case 1:
+ return reg->ExtSwizzleY;
+ case 2:
+ return reg->ExtSwizzleZ;
+ case 3:
+ return reg->ExtSwizzleW;
+ default:
+ assert( 0 );
+ }
+ return 0;
+}
+
+unsigned
+tgsi_util_get_full_src_register_extswizzle(
+ const struct tgsi_full_src_register *reg,
+ unsigned component )
+{
+ unsigned swizzle;
+
+ /*
+ * First, calculate the extended swizzle for a given channel. This will give
+ * us either a channel index into the simple swizzle or a constant 1 or 0.
+ */
+ swizzle = tgsi_util_get_src_register_extswizzle(
+ &reg->SrcRegisterExtSwz,
+ component );
+
+ assert (TGSI_SWIZZLE_X == TGSI_EXTSWIZZLE_X);
+ assert (TGSI_SWIZZLE_Y == TGSI_EXTSWIZZLE_Y);
+ assert (TGSI_SWIZZLE_Z == TGSI_EXTSWIZZLE_Z);
+ assert (TGSI_SWIZZLE_W == TGSI_EXTSWIZZLE_W);
+ assert (TGSI_EXTSWIZZLE_ZERO > TGSI_SWIZZLE_W);
+ assert (TGSI_EXTSWIZZLE_ONE > TGSI_SWIZZLE_W);
+
+ /*
+ * Second, calculate the simple swizzle for the unswizzled channel index.
+ * Leave the constants intact, they are not affected by the simple swizzle.
+ */
+ if( swizzle <= TGSI_SWIZZLE_W ) {
+ swizzle = tgsi_util_get_src_register_swizzle(
+ &reg->SrcRegister,
+ component );
+ }
+
+ return swizzle;
+}
+
+void
+tgsi_util_set_src_register_swizzle(
+ struct tgsi_src_register *reg,
+ unsigned swizzle,
+ unsigned component )
+{
+ switch( component ) {
+ case 0:
+ reg->SwizzleX = swizzle;
+ break;
+ case 1:
+ reg->SwizzleY = swizzle;
+ break;
+ case 2:
+ reg->SwizzleZ = swizzle;
+ break;
+ case 3:
+ reg->SwizzleW = swizzle;
+ break;
+ default:
+ assert( 0 );
+ }
+}
+
+void
+tgsi_util_set_src_register_extswizzle(
+ struct tgsi_src_register_ext_swz *reg,
+ unsigned swizzle,
+ unsigned component )
+{
+ switch( component ) {
+ case 0:
+ reg->ExtSwizzleX = swizzle;
+ break;
+ case 1:
+ reg->ExtSwizzleY = swizzle;
+ break;
+ case 2:
+ reg->ExtSwizzleZ = swizzle;
+ break;
+ case 3:
+ reg->ExtSwizzleW = swizzle;
+ break;
+ default:
+ assert( 0 );
+ }
+}
+
+unsigned
+tgsi_util_get_src_register_extnegate(
+ const struct tgsi_src_register_ext_swz *reg,
+ unsigned component )
+{
+ switch( component ) {
+ case 0:
+ return reg->NegateX;
+ case 1:
+ return reg->NegateY;
+ case 2:
+ return reg->NegateZ;
+ case 3:
+ return reg->NegateW;
+ default:
+ assert( 0 );
+ }
+ return 0;
+}
+
+void
+tgsi_util_set_src_register_extnegate(
+ struct tgsi_src_register_ext_swz *reg,
+ unsigned negate,
+ unsigned component )
+{
+ switch( component ) {
+ case 0:
+ reg->NegateX = negate;
+ break;
+ case 1:
+ reg->NegateY = negate;
+ break;
+ case 2:
+ reg->NegateZ = negate;
+ break;
+ case 3:
+ reg->NegateW = negate;
+ break;
+ default:
+ assert( 0 );
+ }
+}
+
+unsigned
+tgsi_util_get_full_src_register_sign_mode(
+ const struct tgsi_full_src_register *reg,
+ unsigned component )
+{
+ unsigned sign_mode;
+
+ if( reg->SrcRegisterExtMod.Absolute ) {
+ /* Consider only the post-abs negation. */
+
+ if( reg->SrcRegisterExtMod.Negate ) {
+ sign_mode = TGSI_UTIL_SIGN_SET;
+ }
+ else {
+ sign_mode = TGSI_UTIL_SIGN_CLEAR;
+ }
+ }
+ else {
+ /* Accumulate the three negations. */
+
+ unsigned negate;
+
+ negate = reg->SrcRegister.Negate;
+ if( tgsi_util_get_src_register_extnegate( &reg->SrcRegisterExtSwz, component ) ) {
+ negate = !negate;
+ }
+ if( reg->SrcRegisterExtMod.Negate ) {
+ negate = !negate;
+ }
+
+ if( negate ) {
+ sign_mode = TGSI_UTIL_SIGN_TOGGLE;
+ }
+ else {
+ sign_mode = TGSI_UTIL_SIGN_KEEP;
+ }
+ }
+
+ return sign_mode;
+}
+
+void
+tgsi_util_set_full_src_register_sign_mode(
+ struct tgsi_full_src_register *reg,
+ unsigned sign_mode )
+{
+ reg->SrcRegisterExtSwz.NegateX = 0;
+ reg->SrcRegisterExtSwz.NegateY = 0;
+ reg->SrcRegisterExtSwz.NegateZ = 0;
+ reg->SrcRegisterExtSwz.NegateW = 0;
+
+ switch (sign_mode)
+ {
+ case TGSI_UTIL_SIGN_CLEAR:
+ reg->SrcRegister.Negate = 0;
+ reg->SrcRegisterExtMod.Absolute = 1;
+ reg->SrcRegisterExtMod.Negate = 0;
+ break;
+
+ case TGSI_UTIL_SIGN_SET:
+ reg->SrcRegister.Negate = 0;
+ reg->SrcRegisterExtMod.Absolute = 1;
+ reg->SrcRegisterExtMod.Negate = 1;
+ break;
+
+ case TGSI_UTIL_SIGN_TOGGLE:
+ reg->SrcRegister.Negate = 1;
+ reg->SrcRegisterExtMod.Absolute = 0;
+ reg->SrcRegisterExtMod.Negate = 0;
+ break;
+
+ case TGSI_UTIL_SIGN_KEEP:
+ reg->SrcRegister.Negate = 0;
+ reg->SrcRegisterExtMod.Absolute = 0;
+ reg->SrcRegisterExtMod.Negate = 0;
+ break;
+
+ default:
+ assert( 0 );
+ }
+}
+