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+/**************************************************************************
+ *
+ * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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 TGSI_EXEC_H
+#define TGSI_EXEC_H
+
+#include "pipe/p_compiler.h"
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+#define MAX_LABELS 1024
+
+#define NUM_CHANNELS 4 /* R,G,B,A */
+#define QUAD_SIZE 4 /* 4 pixel/quad */
+
+/**
+ * Registers may be treated as float, signed int or unsigned int.
+ */
+union tgsi_exec_channel
+{
+ float f[QUAD_SIZE];
+ int i[QUAD_SIZE];
+ unsigned u[QUAD_SIZE];
+};
+
+/**
+ * A vector[RGBA] of channels[4 pixels]
+ */
+struct tgsi_exec_vector
+{
+ union tgsi_exec_channel xyzw[NUM_CHANNELS];
+};
+
+/**
+ * For fragment programs, information for computing fragment input
+ * values from plane equation of the triangle/line.
+ */
+struct tgsi_interp_coef
+{
+ float a0[NUM_CHANNELS]; /* in an xyzw layout */
+ float dadx[NUM_CHANNELS];
+ float dady[NUM_CHANNELS];
+};
+
+/**
+ * Information for sampling textures, which must be implemented
+ * by code outside the TGSI executor.
+ */
+struct tgsi_sampler
+{
+ /** Get samples for four fragments in a quad */
+ void (*get_samples)(struct tgsi_sampler *sampler,
+ const float s[QUAD_SIZE],
+ const float t[QUAD_SIZE],
+ const float p[QUAD_SIZE],
+ float lodbias,
+ float rgba[NUM_CHANNELS][QUAD_SIZE]);
+};
+
+/**
+ * For branching/calling subroutines.
+ */
+struct tgsi_exec_labels
+{
+ unsigned labels[MAX_LABELS][2];
+ unsigned count;
+};
+
+
+#define TGSI_EXEC_NUM_TEMPS 128
+#define TGSI_EXEC_NUM_TEMP_EXTRAS 6
+#define TGSI_EXEC_NUM_IMMEDIATES 256
+
+/*
+ * Locations of various utility registers (_I = Index, _C = Channel)
+ */
+#define TGSI_EXEC_TEMP_00000000_I (TGSI_EXEC_NUM_TEMPS + 0)
+#define TGSI_EXEC_TEMP_00000000_C 0
+
+#define TGSI_EXEC_TEMP_7FFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
+#define TGSI_EXEC_TEMP_7FFFFFFF_C 1
+
+#define TGSI_EXEC_TEMP_80000000_I (TGSI_EXEC_NUM_TEMPS + 0)
+#define TGSI_EXEC_TEMP_80000000_C 2
+
+#define TGSI_EXEC_TEMP_FFFFFFFF_I (TGSI_EXEC_NUM_TEMPS + 0)
+#define TGSI_EXEC_TEMP_FFFFFFFF_C 3
+
+#define TGSI_EXEC_TEMP_ONE_I (TGSI_EXEC_NUM_TEMPS + 1)
+#define TGSI_EXEC_TEMP_ONE_C 0
+
+#define TGSI_EXEC_TEMP_TWO_I (TGSI_EXEC_NUM_TEMPS + 1)
+#define TGSI_EXEC_TEMP_TWO_C 1
+
+#define TGSI_EXEC_TEMP_128_I (TGSI_EXEC_NUM_TEMPS + 1)
+#define TGSI_EXEC_TEMP_128_C 2
+
+#define TGSI_EXEC_TEMP_MINUS_128_I (TGSI_EXEC_NUM_TEMPS + 1)
+#define TGSI_EXEC_TEMP_MINUS_128_C 3
+
+#define TGSI_EXEC_TEMP_KILMASK_I (TGSI_EXEC_NUM_TEMPS + 2)
+#define TGSI_EXEC_TEMP_KILMASK_C 0
+
+#define TGSI_EXEC_TEMP_OUTPUT_I (TGSI_EXEC_NUM_TEMPS + 2)
+#define TGSI_EXEC_TEMP_OUTPUT_C 1
+
+#define TGSI_EXEC_TEMP_PRIMITIVE_I (TGSI_EXEC_NUM_TEMPS + 2)
+#define TGSI_EXEC_TEMP_PRIMITIVE_C 2
+
+/* NVIDIA condition code (CC) vector
+ */
+#define TGSI_EXEC_CC_GT 0x01
+#define TGSI_EXEC_CC_EQ 0x02
+#define TGSI_EXEC_CC_LT 0x04
+#define TGSI_EXEC_CC_UN 0x08
+
+#define TGSI_EXEC_CC_X_MASK 0x000000ff
+#define TGSI_EXEC_CC_X_SHIFT 0
+#define TGSI_EXEC_CC_Y_MASK 0x0000ff00
+#define TGSI_EXEC_CC_Y_SHIFT 8
+#define TGSI_EXEC_CC_Z_MASK 0x00ff0000
+#define TGSI_EXEC_CC_Z_SHIFT 16
+#define TGSI_EXEC_CC_W_MASK 0xff000000
+#define TGSI_EXEC_CC_W_SHIFT 24
+
+#define TGSI_EXEC_TEMP_CC_I (TGSI_EXEC_NUM_TEMPS + 2)
+#define TGSI_EXEC_TEMP_CC_C 3
+
+#define TGSI_EXEC_TEMP_THREE_I (TGSI_EXEC_NUM_TEMPS + 3)
+#define TGSI_EXEC_TEMP_THREE_C 0
+
+#define TGSI_EXEC_TEMP_HALF_I (TGSI_EXEC_NUM_TEMPS + 3)
+#define TGSI_EXEC_TEMP_HALF_C 1
+
+/* execution mask, each value is either 0 or ~0 */
+#define TGSI_EXEC_MASK_I (TGSI_EXEC_NUM_TEMPS + 3)
+#define TGSI_EXEC_MASK_C 2
+
+#define TGSI_EXEC_TEMP_R0 (TGSI_EXEC_NUM_TEMPS + 4)
+
+#define TGSI_EXEC_TEMP_ADDR (TGSI_EXEC_NUM_TEMPS + 5)
+
+
+#define TGSI_EXEC_MAX_COND_NESTING 20
+#define TGSI_EXEC_MAX_LOOP_NESTING 20
+#define TGSI_EXEC_MAX_CALL_NESTING 20
+
+/* The maximum number of input attributes per vertex. For 2D
+ * input register files, this is the stride between two 1D
+ * arrays.
+ */
+#define TGSI_EXEC_MAX_INPUT_ATTRIBS 17
+
+/* The maximum number of constant vectors per constant buffer.
+ */
+#define TGSI_EXEC_MAX_CONST_BUFFER 4096
+
+/**
+ * Run-time virtual machine state for executing TGSI shader.
+ */
+struct tgsi_exec_machine
+{
+ /* Total = program temporaries + internal temporaries
+ * + 1 padding to align to 16 bytes
+ */
+ struct tgsi_exec_vector _Temps[TGSI_EXEC_NUM_TEMPS +
+ TGSI_EXEC_NUM_TEMP_EXTRAS + 1];
+
+ /*
+ * This will point to _Temps after aligning to 16B boundary.
+ */
+ struct tgsi_exec_vector *Temps;
+ struct tgsi_exec_vector *Addrs;
+
+ struct tgsi_sampler **Samplers;
+
+ float Imms[TGSI_EXEC_NUM_IMMEDIATES][4];
+ unsigned ImmLimit;
+ const float (*Consts)[4];
+ struct tgsi_exec_vector *Inputs;
+ struct tgsi_exec_vector *Outputs;
+ const struct tgsi_token *Tokens;
+ unsigned Processor;
+
+ /* GEOMETRY processor only. */
+ unsigned *Primitives;
+
+ /* FRAGMENT processor only. */
+ const struct tgsi_interp_coef *InterpCoefs;
+ struct tgsi_exec_vector QuadPos;
+
+ /* Conditional execution masks */
+ uint CondMask; /**< For IF/ELSE/ENDIF */
+ uint LoopMask; /**< For BGNLOOP/ENDLOOP */
+ uint ContMask; /**< For loop CONT statements */
+ uint FuncMask; /**< For function calls */
+ uint ExecMask; /**< = CondMask & LoopMask */
+
+ /** Condition mask stack (for nested conditionals) */
+ uint CondStack[TGSI_EXEC_MAX_COND_NESTING];
+ int CondStackTop;
+
+ /** Loop mask stack (for nested loops) */
+ uint LoopStack[TGSI_EXEC_MAX_LOOP_NESTING];
+ int LoopStackTop;
+
+ /** Loop continue mask stack (see comments in tgsi_exec.c) */
+ uint ContStack[TGSI_EXEC_MAX_LOOP_NESTING];
+ int ContStackTop;
+
+ /** Function execution mask stack (for executing subroutine code) */
+ uint FuncStack[TGSI_EXEC_MAX_CALL_NESTING];
+ int FuncStackTop;
+
+ /** Function call stack for saving/restoring the program counter */
+ uint CallStack[TGSI_EXEC_MAX_CALL_NESTING];
+ int CallStackTop;
+
+ struct tgsi_full_instruction *Instructions;
+ uint NumInstructions;
+
+ struct tgsi_full_declaration *Declarations;
+ uint NumDeclarations;
+
+ struct tgsi_exec_labels Labels;
+};
+
+void
+tgsi_exec_machine_init(
+ struct tgsi_exec_machine *mach );
+
+
+void
+tgsi_exec_machine_bind_shader(
+ struct tgsi_exec_machine *mach,
+ const struct tgsi_token *tokens,
+ uint numSamplers,
+ struct tgsi_sampler **samplers);
+
+uint
+tgsi_exec_machine_run(
+ struct tgsi_exec_machine *mach );
+
+
+void
+tgsi_exec_machine_free_data(struct tgsi_exec_machine *mach);
+
+
+static INLINE void
+tgsi_set_kill_mask(struct tgsi_exec_machine *mach, unsigned mask)
+{
+ mach->Temps[TGSI_EXEC_TEMP_KILMASK_I].xyzw[TGSI_EXEC_TEMP_KILMASK_C].u[0] =
+ mask;
+}
+
+
+/** Set execution mask values prior to executing the shader */
+static INLINE void
+tgsi_set_exec_mask(struct tgsi_exec_machine *mach,
+ boolean ch0, boolean ch1, boolean ch2, boolean ch3)
+{
+ int *mask = mach->Temps[TGSI_EXEC_MASK_I].xyzw[TGSI_EXEC_MASK_C].i;
+ mask[0] = ch0 ? ~0 : 0;
+ mask[1] = ch1 ? ~0 : 0;
+ mask[2] = ch2 ? ~0 : 0;
+ mask[3] = ch3 ? ~0 : 0;
+}
+
+
+#if defined __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* TGSI_EXEC_H */