[Mesa-dev] [PATCH 25/33] intel: compiler: abstract printing

Lionel Landwerlin lionel.g.landwerlin at intel.com
Mon Oct 30 16:58:38 UTC 2017


This is required to have output redirected to something else than a
file descriptor (stdout).

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
 src/intel/compiler/brw_compile_clip.c     |   5 +-
 src/intel/compiler/brw_compile_sf.c       |   5 +-
 src/intel/compiler/brw_disasm.c           | 645 ++++++++++++++++--------------
 src/intel/compiler/brw_eu.c               |  39 --
 src/intel/compiler/brw_eu.h               |  13 +-
 src/intel/compiler/brw_eu_compact.c       |   9 +-
 src/intel/compiler/intel_asm_annotation.c |   5 +-
 src/intel/compiler/test_eu_compact.cpp    |   7 +-
 src/intel/tools/aubinator.c               |  12 +-
 src/intel/tools/disasm.c                  |  63 ++-
 src/intel/tools/gen_disasm.h              |   7 +-
 11 files changed, 459 insertions(+), 351 deletions(-)

diff --git a/src/intel/compiler/brw_compile_clip.c b/src/intel/compiler/brw_compile_clip.c
index 83788e4b648..8ed82a78fb4 100644
--- a/src/intel/compiler/brw_compile_clip.c
+++ b/src/intel/compiler/brw_compile_clip.c
@@ -88,7 +88,10 @@ brw_compile_clip(const struct brw_compiler *compiler,
    if (unlikely(INTEL_DEBUG & DEBUG_CLIP)) {
       fprintf(stderr, "clip:\n");
       brw_disassemble(compiler->devinfo,
-                      program, 0, *final_assembly_size, stderr);
+                      program, 0, *final_assembly_size,
+                      &(struct brw_print){
+                         .handle = stderr,
+                         .string = (brw_print_cb) fputs, });
       fprintf(stderr, "\n");
    }
 
diff --git a/src/intel/compiler/brw_compile_sf.c b/src/intel/compiler/brw_compile_sf.c
index 91e8a6da6cf..8ad5497290e 100644
--- a/src/intel/compiler/brw_compile_sf.c
+++ b/src/intel/compiler/brw_compile_sf.c
@@ -871,7 +871,10 @@ brw_compile_sf(const struct brw_compiler *compiler,
    if (unlikely(INTEL_DEBUG & DEBUG_SF)) {
       fprintf(stderr, "sf:\n");
       brw_disassemble(compiler->devinfo,
-                      program, 0, *final_assembly_size, stderr);
+                      program, 0, *final_assembly_size,
+                      &(struct brw_print){
+                         .handle = stderr,
+                         .string = (brw_print_cb) fputs, });
       fprintf(stderr, "\n");
    }
 
diff --git a/src/intel/compiler/brw_disasm.c b/src/intel/compiler/brw_disasm.c
index 1a94ed39540..b09813529ac 100644
--- a/src/intel/compiler/brw_disasm.c
+++ b/src/intel/compiler/brw_disasm.c
@@ -24,6 +24,8 @@
 #include <string.h>
 #include <stdarg.h>
 
+#include "common/gen_debug.h"
+
 #include "brw_eu_defines.h"
 #include "brw_inst.h"
 #include "brw_shader.h"
@@ -568,18 +570,18 @@ static const char *const sampler_target_format[4] = {
 static int column;
 
 static int
-string(FILE *file, const char *string)
+string(const struct brw_print *prnt, const char *string)
 {
-   fputs(string, file);
+   prnt->string(string, prnt->handle);
    column += strlen(string);
    return 0;
 }
 
 static int
-format(FILE *f, const char *format, ...) PRINTFLIKE(2, 3);
+format(const struct brw_print *prnt, const char *format, ...) PRINTFLIKE(2, 3);
 
 static int
-format(FILE *f, const char *format, ...)
+format(const struct brw_print *prnt, const char *format, ...)
 {
    char buf[1024];
    va_list args;
@@ -587,39 +589,39 @@ format(FILE *f, const char *format, ...)
 
    vsnprintf(buf, sizeof(buf) - 1, format, args);
    va_end(args);
-   string(f, buf);
+   string(prnt, buf);
    return 0;
 }
 
 static int
-newline(FILE *f)
+newline(const struct brw_print *prnt)
 {
-   putc('\n', f);
+   prnt->string("\n", prnt->handle);
    column = 0;
    return 0;
 }
 
 static int
-pad(FILE *f, int c)
+pad(const struct brw_print *prnt, int c)
 {
    do
-      string(f, " ");
+      string(prnt, " ");
    while (column < c);
    return 0;
 }
 
 static int
-control(FILE *file, const char *name, const char *const ctrl[],
+control(const struct brw_print *prnt, const char *name, const char *const ctrl[],
         unsigned id, int *space)
 {
    if (!ctrl[id]) {
-      fprintf(file, "*** invalid %s value %d ", name, id);
+      format(prnt, "*** invalid %s value %d ", name, id);
       return 1;
    }
    if (ctrl[id][0]) {
       if (space && *space)
-         string(file, " ");
-      string(file, ctrl[id]);
+         string(prnt, " ");
+      string(prnt, ctrl[id]);
       if (space)
          *space = 1;
    }
@@ -627,20 +629,20 @@ control(FILE *file, const char *name, const char *const ctrl[],
 }
 
 static int
-print_opcode(FILE *file, const struct gen_device_info *devinfo,
+print_opcode(const struct brw_print *prnt, const struct gen_device_info *devinfo,
              enum opcode id)
 {
    const struct opcode_desc *desc = brw_opcode_desc(devinfo, id);
    if (!desc) {
-      format(file, "*** invalid opcode value %d ", id);
+      format(prnt, "*** invalid opcode value %d ", id);
       return 1;
    }
-   string(file, desc->name);
+   string(prnt, desc->name);
    return 0;
 }
 
 static int
-reg(FILE *file, unsigned _reg_file, unsigned _reg_nr)
+reg(const struct brw_print *prnt, unsigned _reg_file, unsigned _reg_nr)
 {
    int err = 0;
 
@@ -651,55 +653,56 @@ reg(FILE *file, unsigned _reg_file, unsigned _reg_nr)
    if (_reg_file == BRW_ARCHITECTURE_REGISTER_FILE) {
       switch (_reg_nr & 0xf0) {
       case BRW_ARF_NULL:
-         string(file, "null");
+         string(prnt, "null");
          break;
       case BRW_ARF_ADDRESS:
-         format(file, "a%d", _reg_nr & 0x0f);
+         format(prnt, "a%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_ACCUMULATOR:
-         format(file, "acc%d", _reg_nr & 0x0f);
+         format(prnt, "acc%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_FLAG:
-         format(file, "f%d", _reg_nr & 0x0f);
+         format(prnt, "f%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_MASK:
-         format(file, "mask%d", _reg_nr & 0x0f);
+         format(prnt, "mask%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_MASK_STACK:
-         format(file, "msd%d", _reg_nr & 0x0f);
+         format(prnt, "msd%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_STATE:
-         format(file, "sr%d", _reg_nr & 0x0f);
+         format(prnt, "sr%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_CONTROL:
-         format(file, "cr%d", _reg_nr & 0x0f);
+         format(prnt, "cr%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_NOTIFICATION_COUNT:
-         format(file, "n%d", _reg_nr & 0x0f);
+         format(prnt, "n%d", _reg_nr & 0x0f);
          break;
       case BRW_ARF_IP:
-         string(file, "ip");
+         string(prnt, "ip");
          return -1;
          break;
       case BRW_ARF_TDR:
-         format(file, "tdr0");
+         format(prnt, "tdr0");
          return -1;
       case BRW_ARF_TIMESTAMP:
-         format(file, "tm%d", _reg_nr & 0x0f);
+         format(prnt, "tm%d", _reg_nr & 0x0f);
          break;
       default:
-         format(file, "ARF%d", _reg_nr);
+         format(prnt, "ARF%d", _reg_nr);
          break;
       }
    } else {
-      err |= control(file, "src reg file", reg_file, _reg_file, NULL);
-      format(file, "%d", _reg_nr);
+      err |= control(prnt, "src reg file", reg_file, _reg_file, NULL);
+      format(prnt, "%d", _reg_nr);
    }
    return err;
 }
 
 static int
-dest(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+dest(const struct brw_print *prnt,
+     const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    enum brw_reg_type type = brw_inst_dst_type(devinfo, inst);
    unsigned elem_size = brw_reg_type_to_size(type);
@@ -707,46 +710,46 @@ dest(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
 
    if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) {
       if (brw_inst_dst_address_mode(devinfo, inst) == BRW_ADDRESS_DIRECT) {
-         err |= reg(file, brw_inst_dst_reg_file(devinfo, inst),
+         err |= reg(prnt, brw_inst_dst_reg_file(devinfo, inst),
                     brw_inst_dst_da_reg_nr(devinfo, inst));
          if (err == -1)
             return 0;
          if (brw_inst_dst_da1_subreg_nr(devinfo, inst))
-            format(file, ".%"PRIu64, brw_inst_dst_da1_subreg_nr(devinfo, inst) /
+            format(prnt, ".%"PRIu64, brw_inst_dst_da1_subreg_nr(devinfo, inst) /
                    elem_size);
-         string(file, "<");
-         err |= control(file, "horiz stride", horiz_stride,
+         string(prnt, "<");
+         err |= control(prnt, "horiz stride", horiz_stride,
                         brw_inst_dst_hstride(devinfo, inst), NULL);
-         string(file, ">");
-         string(file, brw_reg_type_to_letters(type));
+         string(prnt, ">");
+         string(prnt, brw_reg_type_to_letters(type));
       } else {
-         string(file, "g[a0");
+         string(prnt, "g[a0");
          if (brw_inst_dst_ia_subreg_nr(devinfo, inst))
-            format(file, ".%"PRIu64, brw_inst_dst_ia_subreg_nr(devinfo, inst) /
+            format(prnt, ".%"PRIu64, brw_inst_dst_ia_subreg_nr(devinfo, inst) /
                    elem_size);
          if (brw_inst_dst_ia1_addr_imm(devinfo, inst))
-            format(file, " %d", brw_inst_dst_ia1_addr_imm(devinfo, inst));
-         string(file, "]<");
-         err |= control(file, "horiz stride", horiz_stride,
+            format(prnt, " %d", brw_inst_dst_ia1_addr_imm(devinfo, inst));
+         string(prnt, "]<");
+         err |= control(prnt, "horiz stride", horiz_stride,
                         brw_inst_dst_hstride(devinfo, inst), NULL);
-         string(file, ">");
-         string(file, brw_reg_type_to_letters(type));
+         string(prnt, ">");
+         string(prnt, brw_reg_type_to_letters(type));
       }
    } else {
       if (brw_inst_dst_address_mode(devinfo, inst) == BRW_ADDRESS_DIRECT) {
-         err |= reg(file, brw_inst_dst_reg_file(devinfo, inst),
+         err |= reg(prnt, brw_inst_dst_reg_file(devinfo, inst),
                     brw_inst_dst_da_reg_nr(devinfo, inst));
          if (err == -1)
             return 0;
          if (brw_inst_dst_da16_subreg_nr(devinfo, inst))
-            format(file, ".%u", 16 / elem_size);
-         string(file, "<1>");
-         err |= control(file, "writemask", writemask,
+            format(prnt, ".%u", 16 / elem_size);
+         string(prnt, "<1>");
+         err |= control(prnt, "writemask", writemask,
                         brw_inst_da16_writemask(devinfo, inst), NULL);
-         string(file, brw_reg_type_to_letters(type));
+         string(prnt, brw_reg_type_to_letters(type));
       } else {
          err = 1;
-         string(file, "Indirect align16 address mode not supported");
+         string(prnt, "Indirect align16 address mode not supported");
       }
    }
 
@@ -754,7 +757,8 @@ dest(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
 }
 
 static int
-dest_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+dest_3src(const struct brw_print *prnt,
+          const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    bool is_align1 = brw_inst_3src_access_mode(devinfo, inst) == BRW_ALIGN_1;
    int err = 0;
@@ -769,7 +773,7 @@ dest_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *ins
    else
       reg_file = BRW_GENERAL_REGISTER_FILE;
 
-   err |= reg(file, reg_file, brw_inst_3src_dst_reg_nr(devinfo, inst));
+   err |= reg(prnt, reg_file, brw_inst_3src_dst_reg_nr(devinfo, inst));
    if (err == -1)
       return 0;
 
@@ -783,36 +787,36 @@ dest_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *ins
    subreg_nr /= brw_reg_type_to_size(type);
 
    if (subreg_nr)
-      format(file, ".%u", subreg_nr);
-   string(file, "<1>");
+      format(prnt, ".%u", subreg_nr);
+   string(prnt, "<1>");
 
    if (!is_align1) {
-      err |= control(file, "writemask", writemask,
+      err |= control(prnt, "writemask", writemask,
                      brw_inst_3src_a16_dst_writemask(devinfo, inst), NULL);
    }
-   string(file, brw_reg_type_to_letters(type));
+   string(prnt, brw_reg_type_to_letters(type));
 
    return 0;
 }
 
 static int
-src_align1_region(FILE *file,
+src_align1_region(const struct brw_print *prnt,
                   unsigned _vert_stride, unsigned _width,
                   unsigned _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, ">");
+   string(prnt, "<");
+   err |= control(prnt, "vert stride", vert_stride, _vert_stride, NULL);
+   string(prnt, ",");
+   err |= control(prnt, "width", width, _width, NULL);
+   string(prnt, ",");
+   err |= control(prnt, "horiz_stride", horiz_stride, _horiz_stride, NULL);
+   string(prnt, ">");
    return err;
 }
 
 static int
-src_da1(FILE *file,
+src_da1(const struct brw_print *prnt,
         const struct gen_device_info *devinfo,
         unsigned opcode,
         enum brw_reg_type type, unsigned _reg_file,
@@ -823,26 +827,26 @@ src_da1(FILE *file,
    int err = 0;
 
    if (devinfo->gen >= 8 && is_logic_instruction(opcode))
-      err |= control(file, "bitnot", m_bitnot, _negate, NULL);
+      err |= control(prnt, "bitnot", m_bitnot, _negate, NULL);
    else
-      err |= control(file, "negate", m_negate, _negate, NULL);
+      err |= control(prnt, "negate", m_negate, _negate, NULL);
 
-   err |= control(file, "abs", _abs, __abs, NULL);
+   err |= control(prnt, "abs", _abs, __abs, NULL);
 
-   err |= reg(file, _reg_file, reg_num);
+   err |= reg(prnt, _reg_file, reg_num);
    if (err == -1)
       return 0;
    if (sub_reg_num) {
       unsigned elem_size = brw_reg_type_to_size(type);
-      format(file, ".%d", sub_reg_num / elem_size);   /* use formal style like spec */
+      format(prnt, ".%d", sub_reg_num / elem_size);   /* use formal style like spec */
    }
-   src_align1_region(file, _vert_stride, _width, _horiz_stride);
-   string(file, brw_reg_type_to_letters(type));
+   src_align1_region(prnt, _vert_stride, _width, _horiz_stride);
+   string(prnt, brw_reg_type_to_letters(type));
    return err;
 }
 
 static int
-src_ia1(FILE *file,
+src_ia1(const struct brw_print *prnt,
         const struct gen_device_info *devinfo,
         unsigned opcode,
         enum brw_reg_type type,
@@ -856,25 +860,25 @@ src_ia1(FILE *file,
    int err = 0;
 
    if (devinfo->gen >= 8 && is_logic_instruction(opcode))
-      err |= control(file, "bitnot", m_bitnot, _negate, NULL);
+      err |= control(prnt, "bitnot", m_bitnot, _negate, NULL);
    else
-      err |= control(file, "negate", m_negate, _negate, NULL);
+      err |= control(prnt, "negate", m_negate, _negate, NULL);
 
-   err |= control(file, "abs", _abs, __abs, NULL);
+   err |= control(prnt, "abs", _abs, __abs, NULL);
 
-   string(file, "g[a0");
+   string(prnt, "g[a0");
    if (_addr_subreg_nr)
-      format(file, ".%d", _addr_subreg_nr);
+      format(prnt, ".%d", _addr_subreg_nr);
    if (_addr_imm)
-      format(file, " %d", _addr_imm);
-   string(file, "]");
-   src_align1_region(file, _vert_stride, _width, _horiz_stride);
-   string(file, brw_reg_type_to_letters(type));
+      format(prnt, " %d", _addr_imm);
+   string(prnt, "]");
+   src_align1_region(prnt, _vert_stride, _width, _horiz_stride);
+   string(prnt, brw_reg_type_to_letters(type));
    return err;
 }
 
 static int
-src_swizzle(FILE *file, unsigned swiz)
+src_swizzle(const struct brw_print *prnt, unsigned swiz)
 {
    unsigned x = BRW_GET_SWZ(swiz, BRW_CHANNEL_X);
    unsigned y = BRW_GET_SWZ(swiz, BRW_CHANNEL_Y);
@@ -883,20 +887,20 @@ src_swizzle(FILE *file, unsigned swiz)
    int err = 0;
 
    if (x == y && x == z && x == w) {
-      string(file, ".");
-      err |= control(file, "channel select", chan_sel, x, NULL);
+      string(prnt, ".");
+      err |= control(prnt, "channel select", chan_sel, x, NULL);
    } else if (swiz != BRW_SWIZZLE_XYZW) {
-      string(file, ".");
-      err |= control(file, "channel select", chan_sel, x, NULL);
-      err |= control(file, "channel select", chan_sel, y, NULL);
-      err |= control(file, "channel select", chan_sel, z, NULL);
-      err |= control(file, "channel select", chan_sel, w, NULL);
+      string(prnt, ".");
+      err |= control(prnt, "channel select", chan_sel, x, NULL);
+      err |= control(prnt, "channel select", chan_sel, y, NULL);
+      err |= control(prnt, "channel select", chan_sel, z, NULL);
+      err |= control(prnt, "channel select", chan_sel, w, NULL);
    }
    return err;
 }
 
 static int
-src_da16(FILE *file,
+src_da16(const struct brw_print *prnt,
          const struct gen_device_info *devinfo,
          unsigned opcode,
          enum brw_reg_type type,
@@ -911,13 +915,13 @@ src_da16(FILE *file,
    int err = 0;
 
    if (devinfo->gen >= 8 && is_logic_instruction(opcode))
-      err |= control(file, "bitnot", m_bitnot, _negate, NULL);
+      err |= control(prnt, "bitnot", m_bitnot, _negate, NULL);
    else
-      err |= control(file, "negate", m_negate, _negate, NULL);
+      err |= control(prnt, "negate", m_negate, _negate, NULL);
 
-   err |= control(file, "abs", _abs, __abs, NULL);
+   err |= control(prnt, "abs", _abs, __abs, NULL);
 
-   err |= reg(file, _reg_file, _reg_nr);
+   err |= reg(prnt, _reg_file, _reg_nr);
    if (err == -1)
       return 0;
    if (_subreg_nr) {
@@ -925,13 +929,13 @@ src_da16(FILE *file,
 
       /* bit4 for subreg number byte addressing. Make this same meaning as
          in da1 case, so output looks consistent. */
-      format(file, ".%d", 16 / elem_size);
+      format(prnt, ".%d", 16 / elem_size);
    }
-   string(file, "<");
-   err |= control(file, "vert stride", vert_stride, _vert_stride, NULL);
-   string(file, ">");
-   err |= src_swizzle(file, BRW_SWIZZLE4(swz_x, swz_y, swz_z, swz_w));
-   string(file, brw_reg_type_to_letters(type));
+   string(prnt, "<");
+   err |= control(prnt, "vert stride", vert_stride, _vert_stride, NULL);
+   string(prnt, ">");
+   err |= src_swizzle(prnt, BRW_SWIZZLE4(swz_x, swz_y, swz_z, swz_w));
+   string(prnt, brw_reg_type_to_letters(type));
    return err;
 }
 
@@ -1016,7 +1020,8 @@ implied_width(enum brw_vertical_stride _vert_stride,
 }
 
 static int
-src0_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+src0_3src(const struct brw_print *prnt,
+          const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    int err = 0;
    unsigned reg_nr, subreg_nr;
@@ -1041,11 +1046,11 @@ src0_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *ins
          enum brw_reg_type type = brw_inst_3src_a1_src0_type(devinfo, inst);
 
          if (type == BRW_REGISTER_TYPE_W) {
-            format(file, "%dW", imm_val);
+            format(prnt, "%dW", imm_val);
          } else if (type == BRW_REGISTER_TYPE_UW) {
-            format(file, "0x%04xUW", imm_val);
+            format(prnt, "0x%04xUW", imm_val);
          } else if (type == BRW_REGISTER_TYPE_HF) {
-            format(file, "%-gF", _mesa_half_to_float(imm_val));
+            format(prnt, "%-gF", _mesa_half_to_float(imm_val));
          }
          return 0;
       }
@@ -1077,24 +1082,25 @@ src0_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *ins
 
    subreg_nr /= brw_reg_type_to_size(type);
 
-   err |= control(file, "negate", m_negate,
+   err |= control(prnt, "negate", m_negate,
                   brw_inst_3src_src0_negate(devinfo, inst), NULL);
-   err |= control(file, "abs", _abs, brw_inst_3src_src0_abs(devinfo, inst), NULL);
+   err |= control(prnt, "abs", _abs, brw_inst_3src_src0_abs(devinfo, inst), NULL);
 
-   err |= reg(file, _file, reg_nr);
+   err |= reg(prnt, _file, reg_nr);
    if (err == -1)
       return 0;
    if (subreg_nr || is_scalar_region)
-      format(file, ".%d", subreg_nr);
-   src_align1_region(file, _vert_stride, _width, _horiz_stride);
+      format(prnt, ".%d", subreg_nr);
+   src_align1_region(prnt, _vert_stride, _width, _horiz_stride);
    if (!is_scalar_region && !is_align1)
-      err |= src_swizzle(file, brw_inst_3src_a16_src0_swizzle(devinfo, inst));
-   string(file, brw_reg_type_to_letters(type));
+      err |= src_swizzle(prnt, brw_inst_3src_a16_src0_swizzle(devinfo, inst));
+   string(prnt, brw_reg_type_to_letters(type));
    return err;
 }
 
 static int
-src1_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+src1_3src(const struct brw_print *prnt,
+          const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    int err = 0;
    unsigned reg_nr, subreg_nr;
@@ -1145,24 +1151,25 @@ src1_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *ins
 
    subreg_nr /= brw_reg_type_to_size(type);
 
-   err |= control(file, "negate", m_negate,
+   err |= control(prnt, "negate", m_negate,
                   brw_inst_3src_src1_negate(devinfo, inst), NULL);
-   err |= control(file, "abs", _abs, brw_inst_3src_src1_abs(devinfo, inst), NULL);
+   err |= control(prnt, "abs", _abs, brw_inst_3src_src1_abs(devinfo, inst), NULL);
 
-   err |= reg(file, _file, reg_nr);
+   err |= reg(prnt, _file, reg_nr);
    if (err == -1)
       return 0;
    if (subreg_nr || is_scalar_region)
-      format(file, ".%d", subreg_nr);
-   src_align1_region(file, _vert_stride, _width, _horiz_stride);
+      format(prnt, ".%d", subreg_nr);
+   src_align1_region(prnt, _vert_stride, _width, _horiz_stride);
    if (!is_scalar_region && !is_align1)
-      err |= src_swizzle(file, brw_inst_3src_a16_src1_swizzle(devinfo, inst));
-   string(file, brw_reg_type_to_letters(type));
+      err |= src_swizzle(prnt, brw_inst_3src_a16_src1_swizzle(devinfo, inst));
+   string(prnt, brw_reg_type_to_letters(type));
    return err;
 }
 
 static int
-src2_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+src2_3src(const struct brw_print *prnt,
+          const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    int err = 0;
    unsigned reg_nr, subreg_nr;
@@ -1187,11 +1194,11 @@ src2_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *ins
          enum brw_reg_type type = brw_inst_3src_a1_src2_type(devinfo, inst);
 
          if (type == BRW_REGISTER_TYPE_W) {
-            format(file, "%dW", imm_val);
+            format(prnt, "%dW", imm_val);
          } else if (type == BRW_REGISTER_TYPE_UW) {
-            format(file, "0x%04xUW", imm_val);
+            format(prnt, "0x%04xUW", imm_val);
          } else if (type == BRW_REGISTER_TYPE_HF) {
-            format(file, "%-gF", _mesa_half_to_float(imm_val));
+            format(prnt, "%-gF", _mesa_half_to_float(imm_val));
          }
          return 0;
       }
@@ -1227,82 +1234,84 @@ src2_3src(FILE *file, const struct gen_device_info *devinfo, const brw_inst *ins
 
    subreg_nr /= brw_reg_type_to_size(type);
 
-   err |= control(file, "negate", m_negate,
+   err |= control(prnt, "negate", m_negate,
                   brw_inst_3src_src2_negate(devinfo, inst), NULL);
-   err |= control(file, "abs", _abs, brw_inst_3src_src2_abs(devinfo, inst), NULL);
+   err |= control(prnt, "abs", _abs, brw_inst_3src_src2_abs(devinfo, inst), NULL);
 
-   err |= reg(file, _file, reg_nr);
+   err |= reg(prnt, _file, reg_nr);
    if (err == -1)
       return 0;
    if (subreg_nr || is_scalar_region)
-      format(file, ".%d", subreg_nr);
-   src_align1_region(file, _vert_stride, _width, _horiz_stride);
+      format(prnt, ".%d", subreg_nr);
+   src_align1_region(prnt, _vert_stride, _width, _horiz_stride);
    if (!is_scalar_region && !is_align1)
-      err |= src_swizzle(file, brw_inst_3src_a16_src2_swizzle(devinfo, inst));
-   string(file, brw_reg_type_to_letters(type));
+      err |= src_swizzle(prnt, brw_inst_3src_a16_src2_swizzle(devinfo, inst));
+   string(prnt, brw_reg_type_to_letters(type));
    return err;
 }
 
 static int
-imm(FILE *file, const struct gen_device_info *devinfo, enum brw_reg_type type,
+imm(const struct brw_print *prnt,
+    const struct gen_device_info *devinfo, enum brw_reg_type type,
     const brw_inst *inst)
 {
    switch (type) {
    case BRW_REGISTER_TYPE_UQ:
-      format(file, "0x%016lxUQ", brw_inst_imm_uq(devinfo, inst));
+      format(prnt, "0x%016lxUQ", brw_inst_imm_uq(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_Q:
-      format(file, "%ldQ", brw_inst_imm_uq(devinfo, inst));
+      format(prnt, "%ldQ", brw_inst_imm_uq(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_UD:
-      format(file, "0x%08xUD", brw_inst_imm_ud(devinfo, inst));
+      format(prnt, "0x%08xUD", brw_inst_imm_ud(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_D:
-      format(file, "%dD", brw_inst_imm_d(devinfo, inst));
+      format(prnt, "%dD", brw_inst_imm_d(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_UW:
-      format(file, "0x%04xUW", (uint16_t) brw_inst_imm_ud(devinfo, inst));
+      format(prnt, "0x%04xUW", (uint16_t) brw_inst_imm_ud(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_W:
-      format(file, "%dW", (int16_t) brw_inst_imm_d(devinfo, inst));
+      format(prnt, "%dW", (int16_t) brw_inst_imm_d(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_UV:
-      format(file, "0x%08xUV", brw_inst_imm_ud(devinfo, inst));
+      format(prnt, "0x%08xUV", brw_inst_imm_ud(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_VF:
-      format(file, "[%-gF, %-gF, %-gF, %-gF]VF",
+      format(prnt, "[%-gF, %-gF, %-gF, %-gF]VF",
              brw_vf_to_float(brw_inst_imm_ud(devinfo, inst)),
              brw_vf_to_float(brw_inst_imm_ud(devinfo, inst) >> 8),
              brw_vf_to_float(brw_inst_imm_ud(devinfo, inst) >> 16),
              brw_vf_to_float(brw_inst_imm_ud(devinfo, inst) >> 24));
       break;
    case BRW_REGISTER_TYPE_V:
-      format(file, "0x%08xV", brw_inst_imm_ud(devinfo, inst));
+      format(prnt, "0x%08xV", brw_inst_imm_ud(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_F:
-      format(file, "%-gF", brw_inst_imm_f(devinfo, inst));
+      format(prnt, "%-gF", brw_inst_imm_f(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_DF:
-      format(file, "%-gDF", brw_inst_imm_df(devinfo, inst));
+      format(prnt, "%-gDF", brw_inst_imm_df(devinfo, inst));
       break;
    case BRW_REGISTER_TYPE_HF:
-      string(file, "Half Float IMM");
+      string(prnt, "Half Float IMM");
       break;
    case BRW_REGISTER_TYPE_UB:
    case BRW_REGISTER_TYPE_B:
-      format(file, "*** invalid immediate type %d ", type);
+      format(prnt, "*** invalid immediate type %d ", type);
    }
    return 0;
 }
 
 static int
-src0(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+src0(const struct brw_print *prnt,
+     const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    if (brw_inst_src0_reg_file(devinfo, inst) == BRW_IMMEDIATE_VALUE) {
-      return imm(file, devinfo, brw_inst_src0_type(devinfo, inst), inst);
+      return imm(prnt, devinfo, brw_inst_src0_type(devinfo, inst), inst);
    } else if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) {
       if (brw_inst_src0_address_mode(devinfo, inst) == BRW_ADDRESS_DIRECT) {
-         return src_da1(file,
+         return src_da1(prnt,
                         devinfo,
                         brw_inst_opcode(devinfo, inst),
                         brw_inst_src0_type(devinfo, inst),
@@ -1315,7 +1324,7 @@ src0(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
                         brw_inst_src0_abs(devinfo, inst),
                         brw_inst_src0_negate(devinfo, inst));
       } else {
-         return src_ia1(file,
+         return src_ia1(prnt,
                         devinfo,
                         brw_inst_opcode(devinfo, inst),
                         brw_inst_src0_type(devinfo, inst),
@@ -1330,7 +1339,7 @@ src0(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
       }
    } else {
       if (brw_inst_src0_address_mode(devinfo, inst) == BRW_ADDRESS_DIRECT) {
-         return src_da16(file,
+         return src_da16(prnt,
                          devinfo,
                          brw_inst_opcode(devinfo, inst),
                          brw_inst_src0_type(devinfo, inst),
@@ -1345,20 +1354,21 @@ src0(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
                          brw_inst_src0_da16_swiz_z(devinfo, inst),
                          brw_inst_src0_da16_swiz_w(devinfo, inst));
       } else {
-         string(file, "Indirect align16 address mode not supported");
+         string(prnt, "Indirect align16 address mode not supported");
          return 1;
       }
    }
 }
 
 static int
-src1(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+src1(const struct brw_print *prnt,
+     const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    if (brw_inst_src1_reg_file(devinfo, inst) == BRW_IMMEDIATE_VALUE) {
-      return imm(file, devinfo, brw_inst_src1_type(devinfo, inst), inst);
+      return imm(prnt, devinfo, brw_inst_src1_type(devinfo, inst), inst);
    } else if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) {
       if (brw_inst_src1_address_mode(devinfo, inst) == BRW_ADDRESS_DIRECT) {
-         return src_da1(file,
+         return src_da1(prnt,
                         devinfo,
                         brw_inst_opcode(devinfo, inst),
                         brw_inst_src1_type(devinfo, inst),
@@ -1371,7 +1381,7 @@ src1(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
                         brw_inst_src1_abs(devinfo, inst),
                         brw_inst_src1_negate(devinfo, inst));
       } else {
-         return src_ia1(file,
+         return src_ia1(prnt,
                         devinfo,
                         brw_inst_opcode(devinfo, inst),
                         brw_inst_src1_type(devinfo, inst),
@@ -1386,7 +1396,7 @@ src1(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
       }
    } else {
       if (brw_inst_src1_address_mode(devinfo, inst) == BRW_ADDRESS_DIRECT) {
-         return src_da16(file,
+         return src_da16(prnt,
                          devinfo,
                          brw_inst_opcode(devinfo, inst),
                          brw_inst_src1_type(devinfo, inst),
@@ -1401,14 +1411,15 @@ src1(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
                          brw_inst_src1_da16_swiz_z(devinfo, inst),
                          brw_inst_src1_da16_swiz_w(devinfo, inst));
       } else {
-         string(file, "Indirect align16 address mode not supported");
+         string(prnt, "Indirect align16 address mode not supported");
          return 1;
       }
    }
 }
 
 static int
-qtr_ctrl(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst)
+qtr_ctrl(const struct brw_print *prnt,
+         const struct gen_device_info *devinfo, const brw_inst *inst)
 {
    int qtr_ctl = brw_inst_qtr_control(devinfo, inst);
    int exec_size = 1 << brw_inst_exec_size(devinfo, inst);
@@ -1416,27 +1427,27 @@ qtr_ctrl(FILE *file, const struct gen_device_info *devinfo, const brw_inst *inst
                             brw_inst_nib_control(devinfo, inst);
 
    if (exec_size < 8 || nib_ctl) {
-      format(file, " %dN", qtr_ctl * 2 + nib_ctl + 1);
+      format(prnt, " %dN", qtr_ctl * 2 + nib_ctl + 1);
    } else if (exec_size == 8) {
       switch (qtr_ctl) {
       case 0:
-         string(file, " 1Q");
+         string(prnt, " 1Q");
          break;
       case 1:
-         string(file, " 2Q");
+         string(prnt, " 2Q");
          break;
       case 2:
-         string(file, " 3Q");
+         string(prnt, " 3Q");
          break;
       case 3:
-         string(file, " 4Q");
+         string(prnt, " 4Q");
          break;
       }
    } else if (exec_size == 16) {
       if (qtr_ctl < 2)
-         string(file, " 1H");
+         string(prnt, " 1H");
       else
-         string(file, " 2H");
+         string(prnt, " 2H");
    }
    return 0;
 }
@@ -1449,12 +1460,18 @@ brw_disassemble_imm(const struct gen_device_info *devinfo,
    brw_inst inst;
    inst.data[0] = (((uint64_t) dw1) << 32) | ((uint64_t) dw0);
    inst.data[1] = (((uint64_t) dw3) << 32) | ((uint64_t) dw2);
-   return brw_disassemble_inst(stderr, devinfo, &inst, false);
+   struct brw_print prnt = {
+      .handle = stderr,
+      .string = (brw_print_cb) fputs,
+   };
+
+   return brw_disassemble_inst(&prnt, devinfo, &inst, false);
 }
 #endif
 
 int
-brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
+brw_disassemble_inst(const struct brw_print *prnt,
+                     const struct gen_device_info *devinfo,
                      const brw_inst *inst, bool is_compacted)
 {
    int err = 0;
@@ -1464,35 +1481,35 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
    const struct opcode_desc *desc = brw_opcode_desc(devinfo, opcode);
 
    if (brw_inst_pred_control(devinfo, inst)) {
-      string(file, "(");
-      err |= control(file, "predicate inverse", pred_inv,
+      string(prnt, "(");
+      err |= control(prnt, "predicate inverse", pred_inv,
                      brw_inst_pred_inv(devinfo, inst), NULL);
-      format(file, "f%"PRIu64, devinfo->gen >= 7 ? brw_inst_flag_reg_nr(devinfo, inst) : 0);
+      format(prnt, "f%"PRIu64, devinfo->gen >= 7 ? brw_inst_flag_reg_nr(devinfo, inst) : 0);
       if (brw_inst_flag_subreg_nr(devinfo, inst))
-         format(file, ".%"PRIu64, brw_inst_flag_subreg_nr(devinfo, inst));
+         format(prnt, ".%"PRIu64, brw_inst_flag_subreg_nr(devinfo, inst));
       if (brw_inst_access_mode(devinfo, inst) == BRW_ALIGN_1) {
-         err |= control(file, "predicate control align1", pred_ctrl_align1,
+         err |= control(prnt, "predicate control align1", pred_ctrl_align1,
                         brw_inst_pred_control(devinfo, inst), NULL);
       } else {
-         err |= control(file, "predicate control align16", pred_ctrl_align16,
+         err |= control(prnt, "predicate control align16", pred_ctrl_align16,
                         brw_inst_pred_control(devinfo, inst), NULL);
       }
-      string(file, ") ");
+      string(prnt, ") ");
    }
 
-   err |= print_opcode(file, devinfo, opcode);
-   err |= control(file, "saturate", saturate, brw_inst_saturate(devinfo, inst),
+   err |= print_opcode(prnt, devinfo, opcode);
+   err |= control(prnt, "saturate", saturate, brw_inst_saturate(devinfo, inst),
                   NULL);
 
-   err |= control(file, "debug control", debug_ctrl,
+   err |= control(prnt, "debug control", debug_ctrl,
                   brw_inst_debug_control(devinfo, inst), NULL);
 
    if (opcode == BRW_OPCODE_MATH) {
-      string(file, " ");
-      err |= control(file, "function", math_function,
+      string(prnt, " ");
+      err |= control(prnt, "function", math_function,
                      brw_inst_math_function(devinfo, inst), NULL);
    } else if (opcode != BRW_OPCODE_SEND && opcode != BRW_OPCODE_SENDC) {
-      err |= control(file, "conditional modifier", conditional_modifier,
+      err |= control(prnt, "conditional modifier", conditional_modifier,
                      brw_inst_cond_modifier(devinfo, inst), NULL);
 
       /* If we're using the conditional modifier, print which flags reg is
@@ -1503,80 +1520,80 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
           (devinfo->gen < 6 || (opcode != BRW_OPCODE_SEL &&
                                 opcode != BRW_OPCODE_IF &&
                                 opcode != BRW_OPCODE_WHILE))) {
-         format(file, ".f%"PRIu64,
+         format(prnt, ".f%"PRIu64,
                 devinfo->gen >= 7 ? brw_inst_flag_reg_nr(devinfo, inst) : 0);
          if (brw_inst_flag_subreg_nr(devinfo, inst))
-            format(file, ".%"PRIu64, brw_inst_flag_subreg_nr(devinfo, inst));
+            format(prnt, ".%"PRIu64, brw_inst_flag_subreg_nr(devinfo, inst));
       }
    }
 
    if (opcode != BRW_OPCODE_NOP && opcode != BRW_OPCODE_NENOP) {
-      string(file, "(");
-      err |= control(file, "execution size", exec_size,
+      string(prnt, "(");
+      err |= control(prnt, "execution size", exec_size,
                      brw_inst_exec_size(devinfo, inst), NULL);
-      string(file, ")");
+      string(prnt, ")");
    }
 
    if (opcode == BRW_OPCODE_SEND && devinfo->gen < 6)
-      format(file, " %"PRIu64, brw_inst_base_mrf(devinfo, inst));
+      format(prnt, " %"PRIu64, brw_inst_base_mrf(devinfo, inst));
 
    if (has_uip(devinfo, opcode)) {
       /* Instructions that have UIP also have JIP. */
-      pad(file, 16);
-      format(file, "JIP: %d", brw_inst_jip(devinfo, inst));
-      pad(file, 32);
-      format(file, "UIP: %d", brw_inst_uip(devinfo, inst));
+      pad(prnt, 16);
+      format(prnt, "JIP: %d", brw_inst_jip(devinfo, inst));
+      pad(prnt, 32);
+      format(prnt, "UIP: %d", brw_inst_uip(devinfo, inst));
    } else if (has_jip(devinfo, opcode)) {
-      pad(file, 16);
+      pad(prnt, 16);
       if (devinfo->gen >= 7) {
-         format(file, "JIP: %d", brw_inst_jip(devinfo, inst));
+         format(prnt, "JIP: %d", brw_inst_jip(devinfo, inst));
       } else {
-         format(file, "JIP: %d", brw_inst_gen6_jump_count(devinfo, inst));
+         format(prnt, "JIP: %d", brw_inst_gen6_jump_count(devinfo, inst));
       }
    } else if (devinfo->gen < 6 && (opcode == BRW_OPCODE_BREAK ||
                                    opcode == BRW_OPCODE_CONTINUE ||
                                    opcode == BRW_OPCODE_ELSE)) {
-      pad(file, 16);
-      format(file, "Jump: %d", brw_inst_gen4_jump_count(devinfo, inst));
-      pad(file, 32);
-      format(file, "Pop: %"PRIu64, brw_inst_gen4_pop_count(devinfo, inst));
+      pad(prnt, 16);
+      format(prnt, "Jump: %d", brw_inst_gen4_jump_count(devinfo, inst));
+      pad(prnt, 32);
+      format(prnt, "Pop: %"PRIu64, brw_inst_gen4_pop_count(devinfo, inst));
    } else if (devinfo->gen < 6 && (opcode == BRW_OPCODE_IF ||
                                    opcode == BRW_OPCODE_IFF ||
                                    opcode == BRW_OPCODE_HALT)) {
-      pad(file, 16);
-      format(file, "Jump: %d", brw_inst_gen4_jump_count(devinfo, inst));
+      pad(prnt, 16);
+      format(prnt, "Jump: %d", brw_inst_gen4_jump_count(devinfo, inst));
    } else if (devinfo->gen < 6 && opcode == BRW_OPCODE_ENDIF) {
-      pad(file, 16);
-      format(file, "Pop: %"PRIu64, brw_inst_gen4_pop_count(devinfo, inst));
+      pad(prnt, 16);
+      format(prnt, "Pop: %"PRIu64, brw_inst_gen4_pop_count(devinfo, inst));
    } else if (opcode == BRW_OPCODE_JMPI) {
-      pad(file, 16);
-      err |= src1(file, devinfo, inst);
+      pad(prnt, 16);
+      err |= src1(prnt, devinfo, inst);
    } else if (desc && desc->nsrc == 3) {
-      pad(file, 16);
-      err |= dest_3src(file, devinfo, inst);
+      pad(prnt, 16);
+      err |= dest_3src(prnt, devinfo, inst);
 
-      pad(file, 32);
-      err |= src0_3src(file, devinfo, inst);
+      pad(prnt, 32);
+      err |= src0_3src(prnt, devinfo, inst);
 
-      pad(file, 48);
-      err |= src1_3src(file, devinfo, inst);
+      pad(prnt, 48);
+      err |= src1_3src(prnt, devinfo, inst);
 
-      pad(file, 64);
-      err |= src2_3src(file, devinfo, inst);
+      pad(prnt, 64);
+      err |= src2_3src(prnt, devinfo, inst);
    } else if (desc) {
       if (desc->ndst > 0) {
-         pad(file, 16);
-         err |= dest(file, devinfo, inst);
+         pad(prnt, 16);
+         err |= dest(prnt, devinfo, inst);
       }
 
       if (desc->nsrc > 0) {
-         pad(file, 32);
-         err |= src0(file, devinfo, inst);
+         pad(prnt, 32);
+         err |= src0(prnt, devinfo, inst);
       }
 
       if (desc->nsrc > 1) {
-         pad(file, 48);
-         err |= src1(file, devinfo, inst);
+         pad(prnt, 48);
+         err |= src1(prnt, devinfo, inst);
       }
    }
 
@@ -1585,78 +1602,78 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
 
       if (brw_inst_src1_reg_file(devinfo, inst) != BRW_IMMEDIATE_VALUE) {
          /* show the indirect descriptor source */
-         pad(file, 48);
-         err |= src1(file, devinfo, inst);
+         pad(prnt, 48);
+         err |= src1(prnt, devinfo, inst);
       }
 
-      newline(file);
-      pad(file, 16);
+      newline(prnt);
+      pad(prnt, 16);
       space = 0;
 
-      fprintf(file, "            ");
-      err |= control(file, "SFID", devinfo->gen >= 6 ? gen6_sfid : gen4_sfid,
+      format(prnt, "            ");
+      err |= control(prnt, "SFID", devinfo->gen >= 6 ? gen6_sfid : gen4_sfid,
                      sfid, &space);
 
 
       if (brw_inst_src1_reg_file(devinfo, inst) != BRW_IMMEDIATE_VALUE) {
-         format(file, " indirect");
+         format(prnt, " indirect");
       } else {
          switch (sfid) {
          case BRW_SFID_MATH:
-            err |= control(file, "math function", math_function,
+            err |= control(prnt, "math function", math_function,
                            brw_inst_math_msg_function(devinfo, inst), &space);
-            err |= control(file, "math saturate", math_saturate,
+            err |= control(prnt, "math saturate", math_saturate,
                            brw_inst_math_msg_saturate(devinfo, inst), &space);
-            err |= control(file, "math signed", math_signed,
+            err |= control(prnt, "math signed", math_signed,
                            brw_inst_math_msg_signed_int(devinfo, inst), &space);
-            err |= control(file, "math scalar", math_scalar,
+            err |= control(prnt, "math scalar", math_scalar,
                            brw_inst_math_msg_data_type(devinfo, inst), &space);
-            err |= control(file, "math precision", math_precision,
+            err |= control(prnt, "math precision", math_precision,
                            brw_inst_math_msg_precision(devinfo, inst), &space);
             break;
          case BRW_SFID_SAMPLER:
             if (devinfo->gen >= 5) {
-               err |= control(file, "sampler message", gen5_sampler_msg_type,
+               err |= control(prnt, "sampler message", gen5_sampler_msg_type,
                               brw_inst_sampler_msg_type(devinfo, inst), &space);
-               err |= control(file, "sampler simd mode", gen5_sampler_simd_mode,
+               err |= control(prnt, "sampler simd mode", gen5_sampler_simd_mode,
                               brw_inst_sampler_simd_mode(devinfo, inst), &space);
-               format(file, " Surface = %"PRIu64" Sampler = %"PRIu64,
+               format(prnt, " Surface = %"PRIu64" Sampler = %"PRIu64,
                       brw_inst_binding_table_index(devinfo, inst),
                       brw_inst_sampler(devinfo, inst));
             } else {
-               format(file, " (%"PRIu64", %"PRIu64", %"PRIu64", ",
+               format(prnt, " (%"PRIu64", %"PRIu64", %"PRIu64", ",
                       brw_inst_binding_table_index(devinfo, inst),
                       brw_inst_sampler(devinfo, inst),
                       brw_inst_sampler_msg_type(devinfo, inst));
                if (!devinfo->is_g4x) {
-                  err |= control(file, "sampler target format",
+                  err |= control(prnt, "sampler target format",
                                  sampler_target_format,
                                  brw_inst_sampler_return_format(devinfo, inst), NULL);
                }
-               string(file, ")");
+               string(prnt, ")");
             }
             break;
          case GEN6_SFID_DATAPORT_SAMPLER_CACHE:
          case GEN6_SFID_DATAPORT_CONSTANT_CACHE:
             /* aka BRW_SFID_DATAPORT_READ on Gen4-5 */
             if (devinfo->gen >= 6) {
-               format(file, " (%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64")",
+               format(prnt, " (%"PRIu64", %"PRIu64", %"PRIu64", %"PRIu64")",
                       brw_inst_binding_table_index(devinfo, inst),
                       brw_inst_dp_msg_control(devinfo, inst),
                       brw_inst_dp_msg_type(devinfo, inst),
                       devinfo->gen >= 7 ? 0 : brw_inst_dp_write_commit(devinfo, inst));
             } else {
                bool is_965 = devinfo->gen == 4 && !devinfo->is_g4x;
-               err |= control(file, "DP read message type",
+               err |= control(prnt, "DP read message type",
                               is_965 ? gen4_dp_read_port_msg_type :
                                        g45_dp_read_port_msg_type,
                               brw_inst_dp_read_msg_type(devinfo, inst),
                               &space);
 
-               format(file, " MsgCtrl = 0x%"PRIx64,
+               format(prnt, " MsgCtrl = 0x%"PRIx64,
                       brw_inst_dp_read_msg_control(devinfo, inst));
 
-               format(file, " Surface = %"PRIu64, brw_inst_binding_table_index(devinfo, inst));
+               format(prnt, " Surface = %"PRIu64, brw_inst_binding_table_index(devinfo, inst));
             }
             break;
 
@@ -1664,7 +1681,7 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
             /* aka BRW_SFID_DATAPORT_WRITE on Gen4-5 */
             unsigned msg_type = brw_inst_dp_write_msg_type(devinfo, inst);
 
-            err |= control(file, "DP rc message type",
+            err |= control(prnt, "DP rc message type",
                            dp_rc_msg_type(devinfo), msg_type, &space);
 
             bool is_rt_write = msg_type ==
@@ -1672,58 +1689,58 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
                                   : BRW_DATAPORT_WRITE_MESSAGE_RENDER_TARGET_WRITE);
 
             if (is_rt_write) {
-               err |= control(file, "RT message type", m_rt_write_subtype,
+               err |= control(prnt, "RT message type", m_rt_write_subtype,
                               brw_inst_rt_message_type(devinfo, inst), &space);
                if (devinfo->gen >= 6 && brw_inst_rt_slot_group(devinfo, inst))
-                  string(file, " Hi");
+                  string(prnt, " Hi");
                if (brw_inst_rt_last(devinfo, inst))
-                  string(file, " LastRT");
+                  string(prnt, " LastRT");
                if (devinfo->gen < 7 && brw_inst_dp_write_commit(devinfo, inst))
-                  string(file, " WriteCommit");
+                  string(prnt, " WriteCommit");
             } else {
-               format(file, " MsgCtrl = 0x%"PRIx64,
+               format(prnt, " MsgCtrl = 0x%"PRIx64,
                       brw_inst_dp_write_msg_control(devinfo, inst));
             }
 
-            format(file, " Surface = %"PRIu64, brw_inst_binding_table_index(devinfo, inst));
+            format(prnt, " Surface = %"PRIu64, brw_inst_binding_table_index(devinfo, inst));
             break;
          }
 
          case BRW_SFID_URB: {
             unsigned opcode = brw_inst_urb_opcode(devinfo, inst);
 
-            format(file, " %"PRIu64, brw_inst_urb_global_offset(devinfo, inst));
+            format(prnt, " %"PRIu64, brw_inst_urb_global_offset(devinfo, inst));
 
             space = 1;
 
-            err |= control(file, "urb opcode",
+            err |= control(prnt, "urb opcode",
                            devinfo->gen >= 7 ? gen7_urb_opcode
                                              : gen5_urb_opcode,
                            opcode, &space);
 
             if (devinfo->gen >= 7 &&
                 brw_inst_urb_per_slot_offset(devinfo, inst)) {
-               string(file, " per-slot");
+               string(prnt, " per-slot");
             }
 
             if (opcode == GEN8_URB_OPCODE_SIMD8_WRITE ||
                 opcode == GEN8_URB_OPCODE_SIMD8_READ) {
                if (brw_inst_urb_channel_mask_present(devinfo, inst))
-                  string(file, " masked");
+                  string(prnt, " masked");
             } else {
-               err |= control(file, "urb swizzle", urb_swizzle,
+               err |= control(prnt, "urb swizzle", urb_swizzle,
                               brw_inst_urb_swizzle_control(devinfo, inst),
                               &space);
             }
 
             if (devinfo->gen < 7) {
-               err |= control(file, "urb allocate", urb_allocate,
+               err |= control(prnt, "urb allocate", urb_allocate,
                               brw_inst_urb_allocate(devinfo, inst), &space);
-               err |= control(file, "urb used", urb_used,
+               err |= control(prnt, "urb used", urb_used,
                               brw_inst_urb_used(devinfo, inst), &space);
             }
             if (devinfo->gen < 8) {
-               err |= control(file, "urb complete", urb_complete,
+               err |= control(prnt, "urb complete", urb_complete,
                               brw_inst_urb_complete(devinfo, inst), &space);
             }
             break;
@@ -1732,70 +1749,70 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
             break;
 
          case BRW_SFID_MESSAGE_GATEWAY:
-            format(file, " (%s)",
+            format(prnt, " (%s)",
                    gen7_gateway_subfuncid[brw_inst_gateway_subfuncid(devinfo, inst)]);
             break;
 
          case GEN7_SFID_DATAPORT_DATA_CACHE:
             if (devinfo->gen >= 7) {
-               format(file, " (");
+               format(prnt, " (");
 
-               err |= control(file, "DP DC0 message type",
+               err |= control(prnt, "DP DC0 message type",
                               dp_dc0_msg_type_gen7,
                               brw_inst_dp_msg_type(devinfo, inst), &space);
 
-               format(file, ", %"PRIu64", ", brw_inst_binding_table_index(devinfo, inst));
+               format(prnt, ", %"PRIu64", ", brw_inst_binding_table_index(devinfo, inst));
 
                switch (brw_inst_dp_msg_type(devinfo, inst)) {
                case GEN7_DATAPORT_DC_UNTYPED_ATOMIC_OP:
-                  control(file, "atomic op", aop,
+                  control(prnt, "atomic op", aop,
                           brw_inst_imm_ud(devinfo, inst) >> 8 & 0xf, &space);
                   break;
                default:
-                  format(file, "%"PRIu64, brw_inst_dp_msg_control(devinfo, inst));
+                  format(prnt, "%"PRIu64, brw_inst_dp_msg_control(devinfo, inst));
                }
-               format(file, ")");
+               format(prnt, ")");
                break;
             }
             /* FALLTHROUGH */
 
          case HSW_SFID_DATAPORT_DATA_CACHE_1: {
             if (devinfo->gen >= 7) {
-               format(file, " (");
+               format(prnt, " (");
 
                unsigned msg_ctrl = brw_inst_dp_msg_control(devinfo, inst);
 
-               err |= control(file, "DP DC1 message type",
+               err |= control(prnt, "DP DC1 message type",
                               dp_dc1_msg_type_hsw,
                               brw_inst_dp_msg_type(devinfo, inst), &space);
 
-               format(file, ", Surface = %"PRIu64", ",
+               format(prnt, ", Surface = %"PRIu64", ",
                       brw_inst_binding_table_index(devinfo, inst));
 
                switch (brw_inst_dp_msg_type(devinfo, inst)) {
                case HSW_DATAPORT_DC_PORT1_UNTYPED_ATOMIC_OP:
                case HSW_DATAPORT_DC_PORT1_TYPED_ATOMIC_OP:
                case HSW_DATAPORT_DC_PORT1_ATOMIC_COUNTER_OP:
-                  format(file, "SIMD%d,", (msg_ctrl & (1 << 4)) ? 8 : 16);
+                  format(prnt, "SIMD%d,", (msg_ctrl & (1 << 4)) ? 8 : 16);
                   /* fallthrough */
                case HSW_DATAPORT_DC_PORT1_UNTYPED_ATOMIC_OP_SIMD4X2:
                case HSW_DATAPORT_DC_PORT1_TYPED_ATOMIC_OP_SIMD4X2:
                case HSW_DATAPORT_DC_PORT1_ATOMIC_COUNTER_OP_SIMD4X2:
-                  control(file, "atomic op", aop, msg_ctrl & 0xf, &space);
+                  control(prnt, "atomic op", aop, msg_ctrl & 0xf, &space);
                   break;
                case HSW_DATAPORT_DC_PORT1_UNTYPED_SURFACE_READ:
                case HSW_DATAPORT_DC_PORT1_UNTYPED_SURFACE_WRITE:
                case HSW_DATAPORT_DC_PORT1_TYPED_SURFACE_READ:
                case HSW_DATAPORT_DC_PORT1_TYPED_SURFACE_WRITE: {
                   static const char *simd_modes[] = { "4x2", "16", "8" };
-                  format(file, "SIMD%s, Mask = 0x%x",
+                  format(prnt, "SIMD%s, Mask = 0x%x",
                          simd_modes[msg_ctrl >> 4], msg_ctrl & 0xf);
                   break;
                }
                default:
-                  format(file, "0x%x", msg_ctrl);
+                  format(prnt, "0x%x", msg_ctrl);
                }
-               format(file, ")");
+               format(prnt, ")");
                break;
             }
             /* FALLTHROUGH */
@@ -1803,7 +1820,7 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
 
          case GEN7_SFID_PIXEL_INTERPOLATOR:
             if (devinfo->gen >= 7) {
-               format(file, " (%s, %s, 0x%02"PRIx64")",
+               format(prnt, " (%s, %s, 0x%02"PRIx64")",
                       brw_inst_pi_nopersp(devinfo, inst) ? "linear" : "persp",
                       pixel_interpolator_msg_types[brw_inst_pi_message_type(devinfo, inst)],
                       brw_inst_pi_message_data(devinfo, inst));
@@ -1812,65 +1829,105 @@ brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
             /* FALLTHROUGH */
 
          default:
-            format(file, "unsupported shared function ID %d", sfid);
+            format(prnt, "unsupported shared function ID %d", sfid);
             break;
          }
 
          if (space)
-            string(file, " ");
-         format(file, "mlen %"PRIu64, brw_inst_mlen(devinfo, inst));
-         format(file, " rlen %"PRIu64, brw_inst_rlen(devinfo, inst));
+            string(prnt, " ");
+         format(prnt, "mlen %"PRIu64, brw_inst_mlen(devinfo, inst));
+         format(prnt, " rlen %"PRIu64, brw_inst_rlen(devinfo, inst));
       }
    }
-   pad(file, 64);
+   pad(prnt, 64);
    if (opcode != BRW_OPCODE_NOP && opcode != BRW_OPCODE_NENOP) {
-      string(file, "{");
+      string(prnt, "{");
       space = 1;
-      err |= control(file, "access mode", access_mode,
+      err |= control(prnt, "access mode", access_mode,
                      brw_inst_access_mode(devinfo, inst), &space);
       if (devinfo->gen >= 6) {
-         err |= control(file, "write enable control", wectrl,
+         err |= control(prnt, "write enable control", wectrl,
                         brw_inst_mask_control(devinfo, inst), &space);
       } else {
-         err |= control(file, "mask control", mask_ctrl,
+         err |= control(prnt, "mask control", mask_ctrl,
                         brw_inst_mask_control(devinfo, inst), &space);
       }
-      err |= control(file, "dependency control", dep_ctrl,
+      err |= control(prnt, "dependency control", dep_ctrl,
                      ((brw_inst_no_dd_check(devinfo, inst) << 1) |
                       brw_inst_no_dd_clear(devinfo, inst)), &space);
 
       if (devinfo->gen >= 6)
-         err |= qtr_ctrl(file, devinfo, inst);
+         err |= qtr_ctrl(prnt, devinfo, inst);
       else {
          if (brw_inst_qtr_control(devinfo, inst) == BRW_COMPRESSION_COMPRESSED &&
              desc && desc->ndst > 0 &&
              brw_inst_dst_reg_file(devinfo, inst) == BRW_MESSAGE_REGISTER_FILE &&
              brw_inst_dst_da_reg_nr(devinfo, inst) & BRW_MRF_COMPR4) {
-            format(file, " compr4");
+            format(prnt, " compr4");
          } else {
-            err |= control(file, "compression control", compr_ctrl,
+            err |= control(prnt, "compression control", compr_ctrl,
                            brw_inst_qtr_control(devinfo, inst), &space);
          }
       }
 
-      err |= control(file, "compaction", cmpt_ctrl, is_compacted, &space);
-      err |= control(file, "thread control", thread_ctrl,
+      err |= control(prnt, "compaction", cmpt_ctrl, is_compacted, &space);
+      err |= control(prnt, "thread control", thread_ctrl,
                      brw_inst_thread_control(devinfo, inst), &space);
       if (has_branch_ctrl(devinfo, opcode)) {
-         err |= control(file, "branch ctrl", branch_ctrl,
+         err |= control(prnt, "branch ctrl", branch_ctrl,
                         brw_inst_branch_control(devinfo, inst), &space);
       } else if (devinfo->gen >= 6) {
-         err |= control(file, "acc write control", accwr,
+         err |= control(prnt, "acc write control", accwr,
                         brw_inst_acc_wr_control(devinfo, inst), &space);
       }
       if (opcode == BRW_OPCODE_SEND || opcode == BRW_OPCODE_SENDC)
-         err |= control(file, "end of thread", end_of_thread,
+         err |= control(prnt, "end of thread", end_of_thread,
                         brw_inst_eot(devinfo, inst), &space);
       if (space)
-         string(file, " ");
-      string(file, "}");
+         string(prnt, " ");
+      string(prnt, "}");
    }
-   string(file, ";");
-   newline(file);
+   string(prnt, ";");
+   newline(prnt);
    return err;
 }
+
+void
+brw_disassemble(const struct gen_device_info *devinfo,
+                const void *assembly, int start, int end,
+                const struct brw_print *prnt)
+{
+   bool dump_hex = (INTEL_DEBUG & DEBUG_HEX) != 0;
+
+   for (int offset = start; offset < end;) {
+      const brw_inst *insn = assembly + offset;
+      brw_inst uncompacted;
+      bool compacted = brw_inst_cmpt_control(devinfo, insn);
+      if (0)
+         format(prnt, "0x%08x: ", offset);
+
+      if (compacted) {
+         brw_compact_inst *compacted = (void *)insn;
+         if (dump_hex) {
+            format(prnt, "0x%08x 0x%08x                       ",
+                   ((uint32_t *)insn)[1],
+                   ((uint32_t *)insn)[0]);
+         }
+
+         brw_uncompact_instruction(devinfo, &uncompacted, compacted);
+         insn = &uncompacted;
+         offset += 8;
+      } else {
+         if (dump_hex) {
+            format(prnt, "0x%08x 0x%08x 0x%08x 0x%08x ",
+                   ((uint32_t *)insn)[3],
+                   ((uint32_t *)insn)[2],
+                   ((uint32_t *)insn)[1],
+                   ((uint32_t *)insn)[0]);
+         }
+         offset += 16;
+      }
+
+      brw_disassemble_inst(prnt, devinfo, insn, compacted);
+   }
+}
diff --git a/src/intel/compiler/brw_eu.c b/src/intel/compiler/brw_eu.c
index b0bdc38f4b5..f580e8ff239 100644
--- a/src/intel/compiler/brw_eu.c
+++ b/src/intel/compiler/brw_eu.c
@@ -335,45 +335,6 @@ const unsigned *brw_get_program( struct brw_codegen *p,
    return (const unsigned *)p->store;
 }
 
-void
-brw_disassemble(const struct gen_device_info *devinfo,
-                const void *assembly, int start, int end, FILE *out)
-{
-   bool dump_hex = (INTEL_DEBUG & DEBUG_HEX) != 0;
-
-   for (int offset = start; offset < end;) {
-      const brw_inst *insn = assembly + offset;
-      brw_inst uncompacted;
-      bool compacted = brw_inst_cmpt_control(devinfo, insn);
-      if (0)
-         fprintf(out, "0x%08x: ", offset);
-
-      if (compacted) {
-         brw_compact_inst *compacted = (void *)insn;
-	 if (dump_hex) {
-	    fprintf(out, "0x%08x 0x%08x                       ",
-		    ((uint32_t *)insn)[1],
-		    ((uint32_t *)insn)[0]);
-	 }
-
-	 brw_uncompact_instruction(devinfo, &uncompacted, compacted);
-	 insn = &uncompacted;
-	 offset += 8;
-      } else {
-	 if (dump_hex) {
-	    fprintf(out, "0x%08x 0x%08x 0x%08x 0x%08x ",
-		    ((uint32_t *)insn)[3],
-		    ((uint32_t *)insn)[2],
-		    ((uint32_t *)insn)[1],
-		    ((uint32_t *)insn)[0]);
-	 }
-	 offset += 16;
-      }
-
-      brw_disassemble_inst(out, devinfo, insn, compacted);
-   }
-}
-
 enum gen {
    GEN4  = (1 << 0),
    GEN45 = (1 << 1),
diff --git a/src/intel/compiler/brw_eu.h b/src/intel/compiler/brw_eu.h
index d8c9be2e544..94cb25887ac 100644
--- a/src/intel/compiler/brw_eu.h
+++ b/src/intel/compiler/brw_eu.h
@@ -51,6 +51,13 @@ extern "C" {
  */
 #define brw_last_inst (&p->store[p->nr_insn - 1])
 
+typedef void (*brw_print_cb)(const char *string, void *handle);
+
+struct brw_print {
+   void *handle;
+   brw_print_cb string;
+};
+
 struct brw_codegen {
    brw_inst *store;
    int store_size;
@@ -114,10 +121,12 @@ void brw_set_default_acc_write_control(struct brw_codegen *p, unsigned value);
 
 void brw_init_codegen(const struct gen_device_info *, struct brw_codegen *p,
 		      void *mem_ctx);
-int brw_disassemble_inst(FILE *file, const struct gen_device_info *devinfo,
+int brw_disassemble_inst(const struct brw_print *prnt,
+                         const struct gen_device_info *devinfo,
                          const struct brw_inst *inst, bool is_compacted);
 void brw_disassemble(const struct gen_device_info *devinfo,
-                     const void *assembly, int start, int end, FILE *out);
+                     const void *assembly, int start, int end,
+                     const struct brw_print *prnt);
 const unsigned *brw_get_program( struct brw_codegen *p, unsigned *sz );
 
 brw_inst *brw_next_insn(struct brw_codegen *p, unsigned opcode);
diff --git a/src/intel/compiler/brw_eu_compact.c b/src/intel/compiler/brw_eu_compact.c
index a9da46957a5..8c4a4014e56 100644
--- a/src/intel/compiler/brw_eu_compact.c
+++ b/src/intel/compiler/brw_eu_compact.c
@@ -1348,14 +1348,19 @@ void brw_debug_compact_uncompact(const struct gen_device_info *devinfo,
                                  brw_inst *orig,
                                  brw_inst *uncompacted)
 {
+   struct brw_print prnt = {
+      .handle = stderr,
+      .string = (brw_print_cb) fputs,
+   };
+
    fprintf(stderr, "Instruction compact/uncompact changed (gen%d):\n",
            devinfo->gen);
 
    fprintf(stderr, "  before: ");
-   brw_disassemble_inst(stderr, devinfo, orig, true);
+   brw_disassemble_inst(&prnt, devinfo, orig, true);
 
    fprintf(stderr, "  after:  ");
-   brw_disassemble_inst(stderr, devinfo, uncompacted, false);
+   brw_disassemble_inst(&prnt, devinfo, uncompacted, false);
 
    uint32_t *before_bits = (uint32_t *)orig;
    uint32_t *after_bits = (uint32_t *)uncompacted;
diff --git a/src/intel/compiler/intel_asm_annotation.c b/src/intel/compiler/intel_asm_annotation.c
index b07a545a12e..e34cc369f0f 100644
--- a/src/intel/compiler/intel_asm_annotation.c
+++ b/src/intel/compiler/intel_asm_annotation.c
@@ -65,7 +65,10 @@ dump_assembly(void *assembly, int num_annotations, struct annotation *annotation
             fprintf(stderr, "   %s\n", last_annotation_string);
       }
 
-      brw_disassemble(devinfo, assembly, start_offset, end_offset, stderr);
+      brw_disassemble(devinfo, assembly, start_offset, end_offset,
+                      &(struct brw_print){
+                         .handle = stderr,
+                         .string = (brw_print_cb) fputs, });
 
       if (annotation[i].error) {
          fputs(annotation[i].error, stderr);
diff --git a/src/intel/compiler/test_eu_compact.cpp b/src/intel/compiler/test_eu_compact.cpp
index 1532e3b9840..427dd8e1cc9 100644
--- a/src/intel/compiler/test_eu_compact.cpp
+++ b/src/intel/compiler/test_eu_compact.cpp
@@ -48,7 +48,12 @@ test_compact_instruction(struct brw_codegen *p, brw_inst src)
       if (memcmp(&unchanged, &dst, sizeof(dst))) {
 	 fprintf(stderr, "Failed to compact, but dst changed\n");
 	 fprintf(stderr, "  Instruction: ");
-	 brw_disassemble_inst(stderr, p->devinfo, &src, false);
+
+         struct brw_print prnt = {
+            .handle = strderr,
+            .string = fputs,
+         };
+         brw_disassemble_inst(&prnt, p->devinfo, &src, false);
 	 return false;
       }
    }
diff --git a/src/intel/tools/aubinator.c b/src/intel/tools/aubinator.c
index 2c4eaab1701..436a4928979 100644
--- a/src/intel/tools/aubinator.c
+++ b/src/intel/tools/aubinator.c
@@ -277,7 +277,7 @@ handle_media_interface_descriptor_load(struct gen_spec *spec, uint32_t *p)
       }
 
       insns = (struct brw_instruction *) (gtt + start);
-      gen_disasm_disassemble(disasm, insns, 0, stdout);
+      gen_disasm_disassemble_print(disasm, insns, 0, stdout);
 
       dump_samplers(spec, descriptors[3] & ~0x1f);
       dump_binding_table(spec, descriptors[4] & ~0x1f);
@@ -375,7 +375,7 @@ handle_3dstate_vs(struct gen_spec *spec, uint32_t *p)
               instruction_base, start);
 
       insns = (struct brw_instruction *) (gtt + instruction_base + start);
-      gen_disasm_disassemble(disasm, insns, 0, stdout);
+      gen_disasm_disassemble_print(disasm, insns, 0, stdout);
    }
 }
 
@@ -399,7 +399,7 @@ handle_3dstate_hs(struct gen_spec *spec, uint32_t *p)
               instruction_base, start);
 
       insns = (struct brw_instruction *) (gtt + instruction_base + start);
-      gen_disasm_disassemble(disasm, insns, 0, stdout);
+      gen_disasm_disassemble_print(disasm, insns, 0, stdout);
    }
 }
 
@@ -493,21 +493,21 @@ handle_3dstate_ps(struct gen_spec *spec, uint32_t *p)
    fprintf(outfile, "  Kernel[0] %s\n", k0);
    if (k0 != unused) {
       insns = (struct brw_instruction *) (gtt + start);
-      gen_disasm_disassemble(disasm, insns, 0, stdout);
+      gen_disasm_disassemble_print(disasm, insns, 0, stdout);
    }
 
    start = instruction_base + (p[k1_offset] & mask);
    fprintf(outfile, "  Kernel[1] %s\n", k1);
    if (k1 != unused) {
       insns = (struct brw_instruction *) (gtt + start);
-      gen_disasm_disassemble(disasm, insns, 0, stdout);
+      gen_disasm_disassemble_print(disasm, insns, 0, stdout);
    }
 
    start = instruction_base + (p[k2_offset] & mask);
    fprintf(outfile, "  Kernel[2] %s\n", k2);
    if (k2 != unused) {
       insns = (struct brw_instruction *) (gtt + start);
-      gen_disasm_disassemble(disasm, insns, 0, stdout);
+      gen_disasm_disassemble_print(disasm, insns, 0, stdout);
    }
 }
 
diff --git a/src/intel/tools/disasm.c b/src/intel/tools/disasm.c
index 251acd313dc..e2f5c11f6f5 100644
--- a/src/intel/tools/disasm.c
+++ b/src/intel/tools/disasm.c
@@ -69,12 +69,71 @@ gen_disasm_find_end(struct gen_disasm *disasm, void *assembly, int start)
    return offset;
 }
 
+static void
+append_string(const char *string, void *data)
+{
+   char **old = data;
+   size_t len = strlen(*old) + strlen(string) + 1;
+   char *new = malloc(len);
+   new[0] = '\0';
+   strcat(new, *old);
+   strcat(new, string);
+   *old = new;
+}
+
 void
 gen_disasm_disassemble(struct gen_disasm *disasm, void *assembly,
-                       int start, FILE *out)
+                       int start, char **ret)
 {
    struct gen_device_info *devinfo = &disasm->devinfo;
    int end = gen_disasm_find_end(disasm, assembly, start);
+   struct brw_print prnt = {
+      .handle = ret,
+      .string = append_string,
+   };
+
+   *ret = strdup("");
+
+   /* Make a dummy annotation structure that brw_validate_instructions
+    * can work from.
+    */
+   struct annotation_info annotation_info = {
+      .ann_count = 1,
+      .ann_size = 2,
+   };
+   annotation_info.mem_ctx = ralloc_context(NULL);
+   annotation_info.ann = rzalloc_array(annotation_info.mem_ctx,
+                                       struct annotation,
+                                       annotation_info.ann_size);
+   annotation_info.ann[0].offset = start;
+   annotation_info.ann[1].offset = end;
+   brw_validate_instructions(devinfo, assembly, start, end, &annotation_info);
+   struct annotation *annotation = annotation_info.ann;
+
+   for (int i = 0; i < annotation_info.ann_count; i++) {
+      int start_offset = annotation[i].offset;
+      int end_offset = annotation[i + 1].offset;
+
+      brw_disassemble(devinfo, assembly, start_offset, end_offset, &prnt);
+
+      if (annotation[i].error) {
+         append_string(annotation[i].error, ret);
+      }
+   }
+
+   ralloc_free(annotation_info.mem_ctx);
+}
+
+void
+gen_disasm_disassemble_print(struct gen_disasm *disasm, void *assembly,
+                             int start, FILE *out)
+{
+   struct gen_device_info *devinfo = &disasm->devinfo;
+   int end = gen_disasm_find_end(disasm, assembly, start);
+   struct brw_print prnt = {
+      .handle = out,
+      .string = (brw_print_cb) fputs,
+   };
 
    /* Make a dummy annotation structure that brw_validate_instructions
     * can work from.
@@ -96,7 +155,7 @@ gen_disasm_disassemble(struct gen_disasm *disasm, void *assembly,
       int start_offset = annotation[i].offset;
       int end_offset = annotation[i + 1].offset;
 
-      brw_disassemble(devinfo, assembly, start_offset, end_offset, out);
+      brw_disassemble(devinfo, assembly, start_offset, end_offset, &prnt);
 
       if (annotation[i].error) {
          fputs(annotation[i].error, out);
diff --git a/src/intel/tools/gen_disasm.h b/src/intel/tools/gen_disasm.h
index d2764bb90b7..281c2dc9cff 100644
--- a/src/intel/tools/gen_disasm.h
+++ b/src/intel/tools/gen_disasm.h
@@ -32,8 +32,11 @@ struct gen_disasm;
 
 struct gen_disasm *gen_disasm_create(int pciid);
 void gen_disasm_disassemble(struct gen_disasm *disasm,
-                            void *assembly, int start, FILE *out);
-
+                            void *assembly, int start,
+                            char **ret);
+void gen_disasm_disassemble_print(struct gen_disasm *disasm,
+                                  void *assembly,
+                                  int start, FILE *out);
 void gen_disasm_destroy(struct gen_disasm *disasm);
 
 #ifdef __cplusplus
-- 
2.15.0.rc2



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