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path: root/src/mesa/drivers/dri/i965/brw_disasm.c
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/*
 * Copyright © 2008 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <stdarg.h>

#include "main/mtypes.h"

#include "brw_context.h"
#include "brw_defines.h"

const struct opcode_desc opcode_descs[128] = {
    [BRW_OPCODE_MOV] = { .name = "mov", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_FRC] = { .name = "frc", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_RNDU] = { .name = "rndu", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_RNDD] = { .name = "rndd", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_RNDE] = { .name = "rnde", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_RNDZ] = { .name = "rndz", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_NOT] = { .name = "not", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_LZD] = { .name = "lzd", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_F32TO16] = { .name = "f32to16", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_F16TO32] = { .name = "f16to32", .nsrc = 1, .ndst = 1 },

    [BRW_OPCODE_MUL] = { .name = "mul", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_MAC] = { .name = "mac", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_MACH] = { .name = "mach", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_LINE] = { .name = "line", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_PLN] = { .name = "pln", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_MAD] = { .name = "mad", .nsrc = 3, .ndst = 1 },
    [BRW_OPCODE_LRP] = { .name = "lrp", .nsrc = 3, .ndst = 1 },
    [BRW_OPCODE_SAD2] = { .name = "sad2", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_SADA2] = { .name = "sada2", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_DP4] = { .name = "dp4", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_DPH] = { .name = "dph", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_DP3] = { .name = "dp3", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_DP2] = { .name = "dp2", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_MATH] = { .name = "math", .nsrc = 2, .ndst = 1 },

    [BRW_OPCODE_AVG] = { .name = "avg", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_ADD] = { .name = "add", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_SEL] = { .name = "sel", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_AND] = { .name = "and", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_OR] = { .name = "or", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_XOR] = { .name = "xor", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_SHR] = { .name = "shr", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_SHL] = { .name = "shl", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_ASR] = { .name = "asr", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_CMP] = { .name = "cmp", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_CMPN] = { .name = "cmpn", .nsrc = 2, .ndst = 1 },

    [BRW_OPCODE_SEND] = { .name = "send", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_SENDC] = { .name = "sendc", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_NOP] = { .name = "nop", .nsrc = 0, .ndst = 0 },
    [BRW_OPCODE_JMPI] = { .name = "jmpi", .nsrc = 0, .ndst = 0 },
    [BRW_OPCODE_IF] = { .name = "if", .nsrc = 2, .ndst = 0 },
    [BRW_OPCODE_IFF] = { .name = "iff", .nsrc = 2, .ndst = 1 },
    [BRW_OPCODE_WHILE] = { .name = "while", .nsrc = 2, .ndst = 0 },
    [BRW_OPCODE_ELSE] = { .name = "else", .nsrc = 2, .ndst = 0 },
    [BRW_OPCODE_BREAK] = { .name = "break", .nsrc = 2, .ndst = 0 },
    [BRW_OPCODE_CONTINUE] = { .name = "cont", .nsrc = 1, .ndst = 0 },
    [BRW_OPCODE_HALT] = { .name = "halt", .nsrc = 1, .ndst = 0 },
    [BRW_OPCODE_MSAVE] = { .name = "msave", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_PUSH] = { .name = "push", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_MRESTORE] = { .name = "mrest", .nsrc = 1, .ndst = 1 },
    [BRW_OPCODE_POP] = { .name = "pop", .nsrc = 2, .ndst = 0 },
    [BRW_OPCODE_WAIT] = { .name = "wait", .nsrc = 1, .ndst = 0 },
    [BRW_OPCODE_DO] = { .name = "do", .nsrc = 0, .ndst = 0 },
    [BRW_OPCODE_ENDIF] = { .name = "endif", .nsrc = 2, .ndst = 0 },
};
static const struct opcode_desc *opcode = opcode_descs;

static const char * const conditional_modifier[16] = {
    [BRW_CONDITIONAL_NONE] = "",
    [BRW_CONDITIONAL_Z] = ".e",
    [BRW_CONDITIONAL_NZ] = ".ne",
    [BRW_CONDITIONAL_G] = ".g",
    [BRW_CONDITIONAL_GE] = ".ge",
    [BRW_CONDITIONAL_L] = ".l",
    [BRW_CONDITIONAL_LE] = ".le",
    [BRW_CONDITIONAL_R] = ".r",
    [BRW_CONDITIONAL_O] = ".o",
    [BRW_CONDITIONAL_U] = ".u",
};

static const char * const negate[2] = {
    [0] = "",
    [1] = "-",
};

static const char * const _abs[2] = {
    [0] = "",
    [1] = "(abs)",
};

static const char * const vert_stride[16] = {
    [0] = "0",
    [1] = "1",
    [2] = "2",
    [3] = "4",
    [4] = "8",
    [5] = "16",
    [6] = "32",
    [15] = "VxH",
};

static const char * const width[8] = {
    [0] = "1",
    [1] = "2",
    [2] = "4",
    [3] = "8",
    [4] = "16",
};

static const char * const horiz_stride[4] = {
    [0] = "0",
    [1] = "1",
    [2] = "2",
    [3] = "4"
};

static const char * const chan_sel[4] = {
    [0] = "x",
    [1] = "y",
    [2] = "z",
    [3] = "w",
};

static const char * const debug_ctrl[2] = {
    [0] = "",
    [1] = ".breakpoint"
};

static const char * const saturate[2] = {
    [0] = "",
    [1] = ".sat"
};

static const char * const accwr[2] = {
    [0] = "",
    [1] = "AccWrEnable"
};

static const char * const wectrl[2] = {
    [0] = "WE_normal",
    [1] = "WE_all"
};

static const char * const exec_size[8] = {
    [0] = "1",
    [1] = "2",
    [2] = "4",
    [3] = "8",
    [4] = "16",
    [5] = "32"
};

static const char * const pred_inv[2] = {
    [0] = "+",
    [1] = "-"
};

static const char * const pred_ctrl_align16[16] = {
    [1] = "",
    [2] = ".x",
    [3] = ".y",
    [4] = ".z",
    [5] = ".w",
    [6] = ".any4h",
    [7] = ".all4h",
};

static const char * const pred_ctrl_align1[16] = {
    [1] = "",
    [2] = ".anyv",
    [3] = ".allv",
    [4] = ".any2h",
    [5] = ".all2h",
    [6] = ".any4h",
    [7] = ".all4h",
    [8] = ".any8h",
    [9] = ".all8h",
    [10] = ".any16h",
    [11] = ".all16h",
};

static const char * const thread_ctrl[4] = {
    [0] = "",
    [2] = "switch"
};

static const char * const compr_ctrl[4] = {
    [0] = "",
    [1] = "sechalf",
    [2] = "compr",
    [3] = "compr4",
};

static const char * const dep_ctrl[4] = {
    [0] = "",
    [1] = "NoDDClr",
    [2] = "NoDDChk",
    [3] = "NoDDClr,NoDDChk",
};

static const char * const mask_ctrl[4] = {
    [0] = "",
    [1] = "nomask",
};

static const char * const access_mode[2] = {
    [0] = "align1",
    [1] = "align16",
};

static const char * const reg_encoding[8] = {
    [0] = "UD",
    [1] = "D",
    [2] = "UW",
    [3] = "W",
    [4] = "UB",
    [5] = "B",
    [7] = "F"
};

const int reg_type_size[8] = {
    [0] = 4,
    [1] = 4,
    [2] = 2,
    [3] = 2,
    [4] = 1,
    [5] = 1,
    [7] = 4
};

static const char * const reg_file[4] = {
    [0] = "A",
    [1] = "g",
    [2] = "m",
    [3] = "imm",
};

static const char * const writemask[16] = {
    [0x0] = ".",
    [0x1] = ".x",
    [0x2] = ".y",
    [0x3] = ".xy",
    [0x4] = ".z",
    [0x5] = ".xz",
    [0x6] = ".yz",
    [0x7] = ".xyz",
    [0x8] = ".w",
    [0x9] = ".xw",
    [0xa] = ".yw",
    [0xb] = ".xyw",
    [0xc] = ".zw",
    [0xd] = ".xzw",
    [0xe] = ".yzw",
    [0xf] = "",
};

static const char * const end_of_thread[2] = {
    [0] = "",
    [1] = "EOT"
};

static const char * const target_function[16] = {
    [BRW_SFID_NULL] = "null",
    [BRW_SFID_MATH] = "math",
    [BRW_SFID_SAMPLER] = "sampler",
    [BRW_SFID_MESSAGE_GATEWAY] = "gateway",
    [BRW_SFID_DATAPORT_READ] = "read",
    [BRW_SFID_DATAPORT_WRITE] = "write",
    [BRW_SFID_URB] = "urb",
    [BRW_SFID_THREAD_SPAWNER] = "thread_spawner"
};

static const char * const target_function_gen6[16] = {
    [BRW_SFID_NULL] = "null",
    [BRW_SFID_MATH] = "math",
    [BRW_SFID_SAMPLER] = "sampler",
    [BRW_SFID_MESSAGE_GATEWAY] = "gateway",
    [BRW_SFID_URB] = "urb",
    [BRW_SFID_THREAD_SPAWNER] = "thread_spawner",
    [GEN6_SFID_DATAPORT_SAMPLER_CACHE] = "sampler",
    [GEN6_SFID_DATAPORT_RENDER_CACHE] = "render",
    [GEN6_SFID_DATAPORT_CONSTANT_CACHE] = "const",
    [GEN7_SFID_DATAPORT_DATA_CACHE] = "data"
};

static const char * const dp_rc_msg_type_gen6[16] = {
    [BRW_DATAPORT_READ_MESSAGE_OWORD_BLOCK_READ] = "OWORD block read",
    [GEN6_DATAPORT_READ_MESSAGE_RENDER_UNORM_READ] = "RT UNORM read",
    [GEN6_DATAPORT_READ_MESSAGE_OWORD_DUAL_BLOCK_READ] = "OWORD dual block read",
    [GEN6_DATAPORT_READ_MESSAGE_MEDIA_BLOCK_READ] = "media block read",
    [GEN6_DATAPORT_READ_MESSAGE_OWORD_UNALIGN_BLOCK_READ] = "OWORD unaligned block read",
    [GEN6_DATAPORT_READ_MESSAGE_DWORD_SCATTERED_READ] = "DWORD scattered read",
    [GEN6_DATAPORT_WRITE_MESSAGE_DWORD_ATOMIC_WRITE] = "DWORD atomic write",
    [GEN6_DATAPORT_WRITE_MESSAGE_OWORD_BLOCK_WRITE] = "OWORD block write",
    [GEN6_DATAPORT_WRITE_MESSAGE_OWORD_DUAL_BLOCK_WRITE] = "OWORD dual block write",
    [GEN6_DATAPORT_WRITE_MESSAGE_MEDIA_BLOCK_WRITE] = "media block write",
    [GEN6_DATAPORT_WRITE_MESSAGE_DWORD_SCATTERED_WRITE] = "DWORD scattered write",
    [GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE] = "RT write",
    [GEN6_DATAPORT_WRITE_MESSAGE_STREAMED_VB_WRITE] = "streamed VB write",
    [GEN6_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_UNORM_WRITE] = "RT UNORMc write",
};

static const char * const math_function[16] = {
    [BRW_MATH_FUNCTION_INV] = "inv",
    [BRW_MATH_FUNCTION_LOG] = "log",
    [BRW_MATH_FUNCTION_EXP] = "exp",
    [BRW_MATH_FUNCTION_SQRT] = "sqrt",
    [BRW_MATH_FUNCTION_RSQ] = "rsq",
    [BRW_MATH_FUNCTION_SIN] = "sin",
    [BRW_MATH_FUNCTION_COS] = "cos",
    [BRW_MATH_FUNCTION_SINCOS] = "sincos",
    [BRW_MATH_FUNCTION_TAN] = "tan",
    [BRW_MATH_FUNCTION_POW] = "pow",
    [BRW_MATH_FUNCTION_INT_DIV_QUOTIENT_AND_REMAINDER] = "intdivmod",
    [BRW_MATH_FUNCTION_INT_DIV_QUOTIENT] = "intdiv",
    [BRW_MATH_FUNCTION_INT_DIV_REMAINDER] = "intmod",
};

static const char * const math_saturate[2] = {
    [0] = "",
    [1] = "sat"
};

static const char * const math_signed[2] = {
    [0] = "",
    [1] = "signed"
};

static const char * const math_scalar[2] = {
    [0] = "",
    [1] = "scalar"
};

static const char * const math_precision[2] = {
    [0] = "",
    [1] = "partial_precision"
};

static const char * const urb_opcode[2] = {
    [0] = "urb_write",
    [1] = "ff_sync",
};

static const char * const urb_swizzle[4] = {
    [BRW_URB_SWIZZLE_NONE] = "",
    [BRW_URB_SWIZZLE_INTERLEAVE] = "interleave",
    [BRW_URB_SWIZZLE_TRANSPOSE] = "transpose",
};

static const char * const urb_allocate[2] = {
    [0] = "",
    [1] = "allocate"
};

static const char * const urb_used[2] = {
    [0] = "",
    [1] = "used"
};

static const char * const urb_complete[2] = {
    [0] = "",
    [1] = "complete"
};

static const char * const sampler_target_format[4] = {
    [0] = "F",
    [2] = "UD",
    [3] = "D"
};


static int column;

static int string (FILE *file, const char *string)
{
    fputs (string, file);
    column += strlen (string);
    return 0;
}

static int format (FILE *f, const char *format, ...)
{
    char    buf[1024];
    va_list	args;
    va_start (args, format);

    vsnprintf (buf, sizeof (buf) - 1, format, args);
    va_end (args);
    string (f, buf);
    return 0;
}

static int newline (FILE *f)
{
    putc ('\n', f);
    column = 0;
    return 0;
}

static int pad (FILE *f, int c)
{
    do
	string (f, " ");
    while (column < c);
    return 0;
}

static int control (FILE *file, const char *name, const char * const ctrl[],
                    GLuint id, int *space)
{
    if (!ctrl[id]) {
	fprintf (file, "*** invalid %s value %d ",
		 name, id);
	return 1;
    }
    if (ctrl[id][0])
    {
	if (space && *space)
	    string (file, " ");
	string (file, ctrl[id]);
	if (space)
	    *space = 1;
    }
    return 0;
}

static int print_opcode (FILE *file, int id)
{
    if (!opcode[id].name) {
	format (file, "*** invalid opcode value %d ", id);
	return 1;
    }
    string (file, opcode[id].name);
    return 0;
}

static int reg (FILE *file, GLuint _reg_file, GLuint _reg_nr)
{
    int	err = 0;

    /* Clear the Compr4 instruction compression bit. */
    if (_reg_file == BRW_MESSAGE_REGISTER_FILE)
       _reg_nr &= ~(1 << 7);

    if (_reg_file == BRW_ARCHITECTURE_REGISTER_FILE) {
	switch (_reg_nr & 0xf0) {
	case BRW_ARF_NULL:
	    string (file, "null");
	    return -1;
	case BRW_ARF_ADDRESS:
	    format (file, "a%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_ACCUMULATOR:
	    format (file, "acc%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_FLAG:
	    format (file, "f%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_MASK:
	    format (file, "mask%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_MASK_STACK:
	    format (file, "msd%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_STATE:
	    format (file, "sr%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_CONTROL:
	    format (file, "cr%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_NOTIFICATION_COUNT:
	    format (file, "n%d", _reg_nr & 0x0f);
	    break;
	case BRW_ARF_IP:
	    string (file, "ip");
	    return -1;
	    break;
	default:
	    format (file, "ARF%d", _reg_nr);
	    break;
	}
    } else {
	err  |= control (file, "src reg file", reg_file, _reg_file, NULL);
	format (file, "%d", _reg_nr);
    }
    return err;
}

static int dest (FILE *file, struct brw_instruction *inst)
{
    int	err = 0;

    if (inst->header.access_mode == BRW_ALIGN_1)
    {
	if (inst->bits1.da1.dest_address_mode == BRW_ADDRESS_DIRECT)
	{
	    err |= reg (file, inst->bits1.da1.dest_reg_file, inst->bits1.da1.dest_reg_nr);
	    if (err == -1)
		return 0;
	    if (inst->bits1.da1.dest_subreg_nr)
		format (file, ".%d", inst->bits1.da1.dest_subreg_nr /
				     reg_type_size[inst->bits1.da1.dest_reg_type]);
	    string (file, "<");
	    err |= control (file, "horiz stride", horiz_stride, inst->bits1.da1.dest_horiz_stride, NULL);
	    string (file, ">");
	    err |= control (file, "dest reg encoding", reg_encoding, inst->bits1.da1.dest_reg_type, NULL);
	}
	else
	{
	    string (file, "g[a0");
	    if (inst->bits1.ia1.dest_subreg_nr)
		format (file, ".%d", inst->bits1.ia1.dest_subreg_nr /
					reg_type_size[inst->bits1.ia1.dest_reg_type]);
	    if (inst->bits1.ia1.dest_indirect_offset)
		format (file, " %d", inst->bits1.ia1.dest_indirect_offset);
	    string (file, "]<");
	    err |= control (file, "horiz stride", horiz_stride, inst->bits1.ia1.dest_horiz_stride, NULL);
	    string (file, ">");
	    err |= control (file, "dest reg encoding", reg_encoding, inst->bits1.ia1.dest_reg_type, NULL);
	}
    }
    else
    {
	if (inst->bits1.da16.dest_address_mode == BRW_ADDRESS_DIRECT)
	{
	    err |= reg (file, inst->bits1.da16.dest_reg_file, inst->bits1.da16.dest_reg_nr);
	    if (err == -1)
		return 0;
	    if (inst->bits1.da16.dest_subreg_nr)
		format (file, ".%d", inst->bits1.da16.dest_subreg_nr /
				     reg_type_size[inst->bits1.da16.dest_reg_type]);
	    string (file, "<1>");
	    err |= control (file, "writemask", writemask, inst->bits1.da16.dest_writemask, NULL);
	    err |= control (file, "dest reg encoding", reg_encoding, inst->bits1.da16.dest_reg_type, NULL);
	}
	else
	{
	    err = 1;
	    string (file, "Indirect align16 address mode not supported");
	}
    }

    return 0;
}

static int dest_3src (FILE *file, struct brw_instruction *inst)
{
    int	err = 0;
    uint32_t reg_file;

    if (inst->bits1.da3src.dest_reg_file)
       reg_file = BRW_MESSAGE_REGISTER_FILE;
    else
       reg_file = BRW_GENERAL_REGISTER_FILE;

    err |= reg (file, reg_file, inst->bits1.da3src.dest_reg_nr);
    if (err == -1)
       return 0;
    if (inst->bits1.da3src.dest_subreg_nr)
       format (file, ".%d", inst->bits1.da3src.dest_subreg_nr);
    string (file, "<1>");
    err |= control (file, "writemask", writemask, inst->bits1.da3src.dest_writemask, NULL);
    err |= control (file, "dest reg encoding", reg_encoding, BRW_REGISTER_TYPE_F, NULL);

    return 0;
}

static int src_align1_region (FILE *file,
			      GLuint _vert_stride, GLuint _width, GLuint _horiz_stride)
{
    int err = 0;
    string (file, "<");
    err |= control (file, "vert stride", vert_stride, _vert_stride, NULL);
    string (file, ",");
    err |= control (file, "width", width, _width, NULL);
    string (file, ",");
    err |= control (file, "horiz_stride", horiz_stride, _horiz_stride, NULL);
    string (file, ">");
    return err;
}

static int src_da1 (FILE *file, GLuint type, GLuint _reg_file,
		    GLuint _vert_stride, GLuint _width, GLuint _horiz_stride,
		    GLuint reg_num, GLuint sub_reg_num, GLuint __abs, GLuint _negate)
{
    int err = 0;
    err |= control (file, "negate", negate, _negate, NULL);
    err |= control (file, "abs", _abs, __abs, NULL);

    err |= reg (file, _reg_file, reg_num);
    if (err == -1)
	return 0;
    if (sub_reg_num)
	format (file, ".%d", sub_reg_num / reg_type_size[type]); /* use formal style like spec */
    src_align1_region (file, _vert_stride, _width, _horiz_stride);
    err |= control (file, "src reg encoding", reg_encoding, type, NULL);
    return err;
}

static int src_ia1 (FILE *file,
		    GLuint type,
		    GLuint _reg_file,
		    GLint _addr_imm,
		    GLuint _addr_subreg_nr,
		    GLuint _negate,
		    GLuint __abs,
		    GLuint _addr_mode,
		    GLuint _horiz_stride,
		    GLuint _width,
		    GLuint _vert_stride)
{
    int err = 0;
    err |= control (file, "negate", negate, _negate, NULL);
    err |= control (file, "abs", _abs, __abs, NULL);

    string (file, "g[a0");
    if (_addr_subreg_nr)
	format (file, ".%d", _addr_subreg_nr);
    if (_addr_imm)
	format (file, " %d", _addr_imm);
    string (file, "]");
    src_align1_region (file, _vert_stride, _width, _horiz_stride);
    err |= control (file, "src reg encoding", reg_encoding, type, NULL);
    return err;
}

static int src_da16 (FILE *file,
		     GLuint _reg_type,
		     GLuint _reg_file,
		     GLuint _vert_stride,
		     GLuint _reg_nr,
		     GLuint _subreg_nr,
		     GLuint __abs,
		     GLuint _negate,
		     GLuint swz_x,
		     GLuint swz_y,
		     GLuint swz_z,
		     GLuint swz_w)
{
    int err = 0;
    err |= control (file, "negate", negate, _negate, NULL);
    err |= control (file, "abs", _abs, __abs, NULL);

    err |= reg (file, _reg_file, _reg_nr);
    if (err == -1)
	return 0;
    if (_subreg_nr)
	/* bit4 for subreg number byte addressing. Make this same meaning as
	   in da1 case, so output looks consistent. */
	format (file, ".%d", 16 / reg_type_size[_reg_type]);
    string (file, "<");
    err |= control (file, "vert stride", vert_stride, _vert_stride, NULL);
    string (file, ",4,1>");
    /*
     * Three kinds of swizzle display:
     *  identity - nothing printed
     *  1->all	 - print the single channel
     *  1->1     - print the mapping
     */
    if (swz_x == BRW_CHANNEL_X &&
	swz_y == BRW_CHANNEL_Y &&
	swz_z == BRW_CHANNEL_Z &&
	swz_w == BRW_CHANNEL_W)
    {
	;
    }
    else if (swz_x == swz_y && swz_x == swz_z && swz_x == swz_w)
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
    }
    else
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
	err |= control (file, "channel select", chan_sel, swz_y, NULL);
	err |= control (file, "channel select", chan_sel, swz_z, NULL);
	err |= control (file, "channel select", chan_sel, swz_w, NULL);
    }
    err |= control (file, "src da16 reg type", reg_encoding, _reg_type, NULL);
    return err;
}

static int src0_3src (FILE *file, struct brw_instruction *inst)
{
    int err = 0;
    GLuint swz_x = (inst->bits2.da3src.src0_swizzle >> 0) & 0x3;
    GLuint swz_y = (inst->bits2.da3src.src0_swizzle >> 2) & 0x3;
    GLuint swz_z = (inst->bits2.da3src.src0_swizzle >> 4) & 0x3;
    GLuint swz_w = (inst->bits2.da3src.src0_swizzle >> 6) & 0x3;

    err |= control (file, "negate", negate, inst->bits1.da3src.src0_negate, NULL);
    err |= control (file, "abs", _abs, inst->bits1.da3src.src0_abs, NULL);

    err |= reg (file, BRW_GENERAL_REGISTER_FILE, inst->bits2.da3src.src0_reg_nr);
    if (err == -1)
	return 0;
    if (inst->bits2.da3src.src0_subreg_nr)
	format (file, ".%d", inst->bits2.da3src.src0_subreg_nr);
    string (file, "<4,1,1>");
    err |= control (file, "src da16 reg type", reg_encoding,
		    BRW_REGISTER_TYPE_F, NULL);
    /*
     * Three kinds of swizzle display:
     *  identity - nothing printed
     *  1->all	 - print the single channel
     *  1->1     - print the mapping
     */
    if (swz_x == BRW_CHANNEL_X &&
	swz_y == BRW_CHANNEL_Y &&
	swz_z == BRW_CHANNEL_Z &&
	swz_w == BRW_CHANNEL_W)
    {
	;
    }
    else if (swz_x == swz_y && swz_x == swz_z && swz_x == swz_w)
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
    }
    else
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
	err |= control (file, "channel select", chan_sel, swz_y, NULL);
	err |= control (file, "channel select", chan_sel, swz_z, NULL);
	err |= control (file, "channel select", chan_sel, swz_w, NULL);
    }
    return err;
}

static int src1_3src (FILE *file, struct brw_instruction *inst)
{
    int err = 0;
    GLuint swz_x = (inst->bits2.da3src.src1_swizzle >> 0) & 0x3;
    GLuint swz_y = (inst->bits2.da3src.src1_swizzle >> 2) & 0x3;
    GLuint swz_z = (inst->bits2.da3src.src1_swizzle >> 4) & 0x3;
    GLuint swz_w = (inst->bits2.da3src.src1_swizzle >> 6) & 0x3;
    GLuint src1_subreg_nr = (inst->bits2.da3src.src1_subreg_nr_low |
			     (inst->bits3.da3src.src1_subreg_nr_high << 2));

    err |= control (file, "negate", negate, inst->bits1.da3src.src1_negate,
		    NULL);
    err |= control (file, "abs", _abs, inst->bits1.da3src.src1_abs, NULL);

    err |= reg (file, BRW_GENERAL_REGISTER_FILE,
		inst->bits3.da3src.src1_reg_nr);
    if (err == -1)
	return 0;
    if (src1_subreg_nr)
	format (file, ".%d", src1_subreg_nr);
    string (file, "<4,1,1>");
    err |= control (file, "src da16 reg type", reg_encoding,
		    BRW_REGISTER_TYPE_F, NULL);
    /*
     * Three kinds of swizzle display:
     *  identity - nothing printed
     *  1->all	 - print the single channel
     *  1->1     - print the mapping
     */
    if (swz_x == BRW_CHANNEL_X &&
	swz_y == BRW_CHANNEL_Y &&
	swz_z == BRW_CHANNEL_Z &&
	swz_w == BRW_CHANNEL_W)
    {
	;
    }
    else if (swz_x == swz_y && swz_x == swz_z && swz_x == swz_w)
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
    }
    else
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
	err |= control (file, "channel select", chan_sel, swz_y, NULL);
	err |= control (file, "channel select", chan_sel, swz_z, NULL);
	err |= control (file, "channel select", chan_sel, swz_w, NULL);
    }
    return err;
}


static int src2_3src (FILE *file, struct brw_instruction *inst)
{
    int err = 0;
    GLuint swz_x = (inst->bits3.da3src.src2_swizzle >> 0) & 0x3;
    GLuint swz_y = (inst->bits3.da3src.src2_swizzle >> 2) & 0x3;
    GLuint swz_z = (inst->bits3.da3src.src2_swizzle >> 4) & 0x3;
    GLuint swz_w = (inst->bits3.da3src.src2_swizzle >> 6) & 0x3;

    err |= control (file, "negate", negate, inst->bits1.da3src.src2_negate,
		    NULL);
    err |= control (file, "abs", _abs, inst->bits1.da3src.src2_abs, NULL);

    err |= reg (file, BRW_GENERAL_REGISTER_FILE,
		inst->bits3.da3src.src2_reg_nr);
    if (err == -1)
	return 0;
    if (inst->bits3.da3src.src2_subreg_nr)
	format (file, ".%d", inst->bits3.da3src.src2_subreg_nr);
    string (file, "<4,1,1>");
    err |= control (file, "src da16 reg type", reg_encoding,
		    BRW_REGISTER_TYPE_F, NULL);
    /*
     * Three kinds of swizzle display:
     *  identity - nothing printed
     *  1->all	 - print the single channel
     *  1->1     - print the mapping
     */
    if (swz_x == BRW_CHANNEL_X &&
	swz_y == BRW_CHANNEL_Y &&
	swz_z == BRW_CHANNEL_Z &&
	swz_w == BRW_CHANNEL_W)
    {
	;
    }
    else if (swz_x == swz_y && swz_x == swz_z && swz_x == swz_w)
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
    }
    else
    {
	string (file, ".");
	err |= control (file, "channel select", chan_sel, swz_x, NULL);
	err |= control (file, "channel select", chan_sel, swz_y, NULL);
	err |= control (file, "channel select", chan_sel, swz_z, NULL);
	err |= control (file, "channel select", chan_sel, swz_w, NULL);
    }
    return err;
}

static int imm (FILE *file, GLuint type, struct brw_instruction *inst) {
    switch (type) {
    case BRW_REGISTER_TYPE_UD:
	format (file, "0x%08xUD", inst->bits3.ud);
	break;
    case BRW_REGISTER_TYPE_D:
	format (file, "%dD", inst->bits3.d);
	break;
    case BRW_REGISTER_TYPE_UW:
	format (file, "0x%04xUW", (uint16_t) inst->bits3.ud);
	break;
    case BRW_REGISTER_TYPE_W:
	format (file, "%dW", (int16_t) inst->bits3.d);
	break;
    case BRW_REGISTER_TYPE_UB:
	format (file, "0x%02xUB", (int8_t) inst->bits3.ud);
	break;
    case BRW_REGISTER_TYPE_VF:
	format (file, "Vector Float");
	break;
    case BRW_REGISTER_TYPE_V:
	format (file, "0x%08xV", inst->bits3.ud);
	break;
    case BRW_REGISTER_TYPE_F:
	format (file, "%-gF", inst->bits3.f);
    }
    return 0;
}

static int src0 (FILE *file, struct brw_instruction *inst)
{
    if (inst->bits1.da1.src0_reg_file == BRW_IMMEDIATE_VALUE)
	return imm (file, inst->bits1.da1.src0_reg_type,
		    inst);
    else if (inst->header.access_mode == BRW_ALIGN_1)
    {
	if (inst->bits2.da1.src0_address_mode == BRW_ADDRESS_DIRECT)
	{
	    return src_da1 (file,
			    inst->bits1.da1.src0_reg_type,
			    inst->bits1.da1.src0_reg_file,
			    inst->bits2.da1.src0_vert_stride,
			    inst->bits2.da1.src0_width,
			    inst->bits2.da1.src0_horiz_stride,
			    inst->bits2.da1.src0_reg_nr,
			    inst->bits2.da1.src0_subreg_nr,
			    inst->bits2.da1.src0_abs,
			    inst->bits2.da1.src0_negate);
	}
	else
	{
	    return src_ia1 (file,
			    inst->bits1.ia1.src0_reg_type,
			    inst->bits1.ia1.src0_reg_file,
			    inst->bits2.ia1.src0_indirect_offset,
			    inst->bits2.ia1.src0_subreg_nr,
			    inst->bits2.ia1.src0_negate,
			    inst->bits2.ia1.src0_abs,
			    inst->bits2.ia1.src0_address_mode,
			    inst->bits2.ia1.src0_horiz_stride,
			    inst->bits2.ia1.src0_width,
			    inst->bits2.ia1.src0_vert_stride);
	}
    }
    else
    {
	if (inst->bits2.da16.src0_address_mode == BRW_ADDRESS_DIRECT)
	{
	    return src_da16 (file,
			     inst->bits1.da16.src0_reg_type,
			     inst->bits1.da16.src0_reg_file,
			     inst->bits2.da16.src0_vert_stride,
			     inst->bits2.da16.src0_reg_nr,
			     inst->bits2.da16.src0_subreg_nr,
			     inst->bits2.da16.src0_abs,
			     inst->bits2.da16.src0_negate,
			     inst->bits2.da16.src0_swz_x,
			     inst->bits2.da16.src0_swz_y,
			     inst->bits2.da16.src0_swz_z,
			     inst->bits2.da16.src0_swz_w);
	}
	else
	{
	    string (file, "Indirect align16 address mode not supported");
	    return 1;
	}
    }
}

static int src1 (FILE *file, struct brw_instruction *inst)
{
    if (inst->bits1.da1.src1_reg_file == BRW_IMMEDIATE_VALUE)
	return imm (file, inst->bits1.da1.src1_reg_type,
		    inst);
    else if (inst->header.access_mode == BRW_ALIGN_1)
    {
	if (inst->bits3.da1.src1_address_mode == BRW_ADDRESS_DIRECT)
	{
	    return src_da1 (file,
			    inst->bits1.da1.src1_reg_type,
			    inst->bits1.da1.src1_reg_file,
			    inst->bits3.da1.src1_vert_stride,
			    inst->bits3.da1.src1_width,
			    inst->bits3.da1.src1_horiz_stride,
			    inst->bits3.da1.src1_reg_nr,
			    inst->bits3.da1.src1_subreg_nr,
			    inst->bits3.da1.src1_abs,
			    inst->bits3.da1.src1_negate);
	}
	else
	{
	    return src_ia1 (file,
			    inst->bits1.ia1.src1_reg_type,
			    inst->bits1.ia1.src1_reg_file,
			    inst->bits3.ia1.src1_indirect_offset,
			    inst->bits3.ia1.src1_subreg_nr,
			    inst->bits3.ia1.src1_negate,
			    inst->bits3.ia1.src1_abs,
			    inst->bits3.ia1.src1_address_mode,
			    inst->bits3.ia1.src1_horiz_stride,
			    inst->bits3.ia1.src1_width,
			    inst->bits3.ia1.src1_vert_stride);
	}
    }
    else
    {
	if (inst->bits3.da16.src1_address_mode == BRW_ADDRESS_DIRECT)
	{
	    return src_da16 (file,
			     inst->bits1.da16.src1_reg_type,
			     inst->bits1.da16.src1_reg_file,
			     inst->bits3.da16.src1_vert_stride,
			     inst->bits3.da16.src1_reg_nr,
			     inst->bits3.da16.src1_subreg_nr,
			     inst->bits3.da16.src1_abs,
			     inst->bits3.da16.src1_negate,
			     inst->bits3.da16.src1_swz_x,
			     inst->bits3.da16.src1_swz_y,
			     inst->bits3.da16.src1_swz_z,
			     inst->bits3.da16.src1_swz_w);
	}
	else
	{
	    string (file, "Indirect align16 address mode not supported");
	    return 1;
	}
    }
}

int esize[6] = {
	[0] = 1,
	[1] = 2,
	[2] = 4,
	[3] = 8,
	[4] = 16,
	[5] = 32,
};

static int qtr_ctrl(FILE *file, struct brw_instruction *inst)
{
    int qtr_ctl = inst->header.compression_control;
    int exec_size = esize[inst->header.execution_size];

    if (exec_size == 8) {
	switch (qtr_ctl) {
	case 0:
	    string (file, " 1Q");
	    break;
	case 1:
	    string (file, " 2Q");
	    break;
	case 2:
	    string (file, " 3Q");
	    break;
	case 3:
	    string (file, " 4Q");
	    break;
	}
    } else if (exec_size == 16){
	if (qtr_ctl < 2)
	    string (file, " 1H");
	else
	    string (file, " 2H");
    }
    return 0;
}

int brw_disasm (FILE *file, struct brw_instruction *inst, int gen)
{
    int	err = 0;
    int space = 0;

    if (inst->header.predicate_control) {
	string (file, "(");
	err |= control (file, "predicate inverse", pred_inv, inst->header.predicate_inverse, NULL);
	format (file, "f%d", gen >= 7 ? inst->bits2.da1.flag_reg_nr : 0);
	if (inst->bits2.da1.flag_subreg_nr)
	    format (file, ".%d", inst->bits2.da1.flag_subreg_nr);
	if (inst->header.access_mode == BRW_ALIGN_1)
	    err |= control (file, "predicate control align1", pred_ctrl_align1,
			    inst->header.predicate_control, NULL);
	else
	    err |= control (file, "predicate control align16", pred_ctrl_align16,
			    inst->header.predicate_control, NULL);
	string (file, ") ");
    }

    err |= print_opcode (file, inst->header.opcode);
    err |= control (file, "saturate", saturate, inst->header.saturate, NULL);
    err |= control (file, "debug control", debug_ctrl, inst->header.debug_control, NULL);

    if (inst->header.opcode == BRW_OPCODE_MATH) {
	string (file, " ");
	err |= control (file, "function", math_function,
			inst->header.destreg__conditionalmod, NULL);
    } else if (inst->header.opcode != BRW_OPCODE_SEND &&
	       inst->header.opcode != BRW_OPCODE_SENDC) {
	err |= control (file, "conditional modifier", conditional_modifier,
			inst->header.destreg__conditionalmod, NULL);

        /* If we're using the conditional modifier, print which flags reg is
         * used for it.  Note that on gen6+, the embedded-condition SEL and
         * control flow doesn't update flags.
         */
	if (inst->header.destreg__conditionalmod &&
            (gen < 6 || (inst->header.opcode != BRW_OPCODE_SEL &&
                         inst->header.opcode != BRW_OPCODE_IF &&
                         inst->header.opcode != BRW_OPCODE_WHILE))) {
	    format (file, ".f%d", gen >= 7 ? inst->bits2.da1.flag_reg_nr : 0);
	    if (inst->bits2.da1.flag_subreg_nr)
		format (file, ".%d", inst->bits2.da1.flag_subreg_nr);
        }
    }

    if (inst->header.opcode != BRW_OPCODE_NOP) {
	string (file, "(");
	err |= control (file, "execution size", exec_size, inst->header.execution_size, NULL);
	string (file, ")");
    }

    if (inst->header.opcode == BRW_OPCODE_SEND && gen < 6)
	format (file, " %d", inst->header.destreg__conditionalmod);

    if (opcode[inst->header.opcode].nsrc == 3) {
       pad (file, 16);
       err |= dest_3src (file, inst);

       pad (file, 32);
       err |= src0_3src (file, inst);

       pad (file, 48);
       err |= src1_3src (file, inst);

       pad (file, 64);
       err |= src2_3src (file, inst);
    } else {
       if (opcode[inst->header.opcode].ndst > 0) {
	  pad (file, 16);
	  err |= dest (file, inst);
       } else if (gen == 7 && (inst->header.opcode == BRW_OPCODE_ELSE ||
			       inst->header.opcode == BRW_OPCODE_ENDIF ||
			       inst->header.opcode == BRW_OPCODE_WHILE)) {
	  format (file, " %d", inst->bits3.break_cont.jip);
       } else if (gen == 6 && (inst->header.opcode == BRW_OPCODE_IF ||
			       inst->header.opcode == BRW_OPCODE_ELSE ||
			       inst->header.opcode == BRW_OPCODE_ENDIF ||
			       inst->header.opcode == BRW_OPCODE_WHILE)) {
	  format (file, " %d", inst->bits1.branch_gen6.jump_count);
       } else if ((gen >= 6 && (inst->header.opcode == BRW_OPCODE_BREAK ||
                                inst->header.opcode == BRW_OPCODE_CONTINUE ||
                                inst->header.opcode == BRW_OPCODE_HALT)) ||
                  (gen == 7 && inst->header.opcode == BRW_OPCODE_IF)) {
	  format (file, " %d %d", inst->bits3.break_cont.uip, inst->bits3.break_cont.jip);
       } else if (inst->header.opcode == BRW_OPCODE_JMPI) {
	  format (file, " %d", inst->bits3.d);
       }

       if (opcode[inst->header.opcode].nsrc > 0) {
	  pad (file, 32);
	  err |= src0 (file, inst);
       }
       if (opcode[inst->header.opcode].nsrc > 1) {
	  pad (file, 48);
	  err |= src1 (file, inst);
       }
    }

    if (inst->header.opcode == BRW_OPCODE_SEND ||
	inst->header.opcode == BRW_OPCODE_SENDC) {
	enum brw_message_target target;

	if (gen >= 6)
	    target = inst->header.destreg__conditionalmod;
	else if (gen == 5)
	    target = inst->bits2.send_gen5.sfid;
	else
	    target = inst->bits3.generic.msg_target;

	newline (file);
	pad (file, 16);
	space = 0;

	if (gen >= 6) {
	   err |= control (file, "target function", target_function_gen6,
			   target, &space);
	} else {
	   err |= control (file, "target function", target_function,
			   target, &space);
	}

	switch (target) {
	case BRW_SFID_MATH:
	    err |= control (file, "math function", math_function,
			    inst->bits3.math.function, &space);
	    err |= control (file, "math saturate", math_saturate,
			    inst->bits3.math.saturate, &space);
	    err |= control (file, "math signed", math_signed,
			    inst->bits3.math.int_type, &space);
	    err |= control (file, "math scalar", math_scalar,
			    inst->bits3.math.data_type, &space);
	    err |= control (file, "math precision", math_precision,
			    inst->bits3.math.precision, &space);
	    break;
	case BRW_SFID_SAMPLER:
	    if (gen >= 7) {
		format (file, " (%d, %d, %d, %d)",
			inst->bits3.sampler_gen7.binding_table_index,
			inst->bits3.sampler_gen7.sampler,
			inst->bits3.sampler_gen7.msg_type,
			inst->bits3.sampler_gen7.simd_mode);
	    } else if (gen >= 5) {
		format (file, " (%d, %d, %d, %d)",
			inst->bits3.sampler_gen5.binding_table_index,
			inst->bits3.sampler_gen5.sampler,
			inst->bits3.sampler_gen5.msg_type,
			inst->bits3.sampler_gen5.simd_mode);
	    } else if (0 /* FINISHME: is_g4x */) {
		format (file, " (%d, %d)",
			inst->bits3.sampler_g4x.binding_table_index,
			inst->bits3.sampler_g4x.sampler);
	    } else {
		format (file, " (%d, %d, ",
			inst->bits3.sampler.binding_table_index,
			inst->bits3.sampler.sampler);
		err |= control (file, "sampler target format",
				sampler_target_format,
				inst->bits3.sampler.return_format, NULL);
		string (file, ")");
	    }
	    break;
	case BRW_SFID_DATAPORT_READ:
	    if (gen >= 6) {
		format (file, " (%d, %d, %d, %d)",
			inst->bits3.gen6_dp.binding_table_index,
			inst->bits3.gen6_dp.msg_control,
			inst->bits3.gen6_dp.msg_type,
			inst->bits3.gen6_dp.send_commit_msg);
	    } else if (gen >= 5 /* FINISHME: || is_g4x */) {
		format (file, " (%d, %d, %d)",
			inst->bits3.dp_read_gen5.binding_table_index,
			inst->bits3.dp_read_gen5.msg_control,
			inst->bits3.dp_read_gen5.msg_type);
	    } else {
		format (file, " (%d, %d, %d)",
			inst->bits3.dp_read.binding_table_index,
			inst->bits3.dp_read.msg_control,
			inst->bits3.dp_read.msg_type);
	    }
	    break;

	case BRW_SFID_DATAPORT_WRITE:
	    if (gen >= 7) {
		format (file, " (");

		err |= control (file, "DP rc message type",
				dp_rc_msg_type_gen6,
				inst->bits3.gen7_dp.msg_type, &space);

		format (file, ", %d, %d, %d)",
			inst->bits3.gen7_dp.binding_table_index,
			inst->bits3.gen7_dp.msg_control,
			inst->bits3.gen7_dp.msg_type);
	    } else if (gen == 6) {
		format (file, " (");

		err |= control (file, "DP rc message type",
				dp_rc_msg_type_gen6,
				inst->bits3.gen6_dp.msg_type, &space);

		format (file, ", %d, %d, %d, %d)",
			inst->bits3.gen6_dp.binding_table_index,
			inst->bits3.gen6_dp.msg_control,
			inst->bits3.gen6_dp.msg_type,
			inst->bits3.gen6_dp.send_commit_msg);
	    } else {
		format (file, " (%d, %d, %d, %d)",
			inst->bits3.dp_write.binding_table_index,
			(inst->bits3.dp_write.last_render_target << 3) |
			inst->bits3.dp_write.msg_control,
			inst->bits3.dp_write.msg_type,
			inst->bits3.dp_write.send_commit_msg);
	    }
	    break;

	case BRW_SFID_URB:
	    if (gen >= 5) {
		format (file, " %d", inst->bits3.urb_gen5.offset);
	    } else {
		format (file, " %d", inst->bits3.urb.offset);
	    }

	    space = 1;
	    if (gen >= 5) {
		err |= control (file, "urb opcode", urb_opcode,
				inst->bits3.urb_gen5.opcode, &space);
	    }
	    err |= control (file, "urb swizzle", urb_swizzle,
			    inst->bits3.urb.swizzle_control, &space);
	    err |= control (file, "urb allocate", urb_allocate,
			    inst->bits3.urb.allocate, &space);
	    err |= control (file, "urb used", urb_used,
			    inst->bits3.urb.used, &space);
	    err |= control (file, "urb complete", urb_complete,
			    inst->bits3.urb.complete, &space);
	    break;
	case BRW_SFID_THREAD_SPAWNER:
	    break;
	case GEN7_SFID_DATAPORT_DATA_CACHE:
	    format (file, " (%d, %d, %d)",
		    inst->bits3.gen7_dp.binding_table_index,
		    inst->bits3.gen7_dp.msg_control,
		    inst->bits3.gen7_dp.msg_type);
	    break;


	default:
	    format (file, "unsupported target %d", target);
	    break;
	}
	if (space)
	    string (file, " ");
	if (gen >= 5) {
	   format (file, "mlen %d",
		   inst->bits3.generic_gen5.msg_length);
	   format (file, " rlen %d",
		   inst->bits3.generic_gen5.response_length);
	} else {
	   format (file, "mlen %d",
		   inst->bits3.generic.msg_length);
	   format (file, " rlen %d",
		   inst->bits3.generic.response_length);
	}
    }
    pad (file, 64);
    if (inst->header.opcode != BRW_OPCODE_NOP) {
	string (file, "{");
	space = 1;
	err |= control(file, "access mode", access_mode, inst->header.access_mode, &space);
	if (gen >= 6)
	    err |= control (file, "write enable control", wectrl, inst->header.mask_control, &space);
	else
	    err |= control (file, "mask control", mask_ctrl, inst->header.mask_control, &space);
	err |= control (file, "dependency control", dep_ctrl, inst->header.dependency_control, &space);

	if (gen >= 6)
	    err |= qtr_ctrl (file, inst);
	else {
	    if (inst->header.compression_control == BRW_COMPRESSION_COMPRESSED &&
		opcode[inst->header.opcode].ndst > 0 &&
		inst->bits1.da1.dest_reg_file == BRW_MESSAGE_REGISTER_FILE &&
		inst->bits1.da1.dest_reg_nr & (1 << 7)) {
		format (file, " compr4");
	    } else {
		err |= control (file, "compression control", compr_ctrl,
				inst->header.compression_control, &space);
	    }
	}

	err |= control (file, "thread control", thread_ctrl, inst->header.thread_control, &space);
	if (gen >= 6)
	    err |= control (file, "acc write control", accwr, inst->header.acc_wr_control, &space);
	if (inst->header.opcode == BRW_OPCODE_SEND ||
	    inst->header.opcode == BRW_OPCODE_SENDC)
	    err |= control (file, "end of thread", end_of_thread,
			    inst->bits3.generic.end_of_thread, &space);
	if (space)
	    string (file, " ");
	string (file, "}");
    }
    string (file, ";");
    newline (file);
    return err;
}