Beispiel #1
0
/* Lots of hardcoding
 *
 * EAX -- pointer to current output vertex
 * ECX -- pointer to current attribute 
 * 
 */
static GLboolean build_vertex_emit( struct x86_program *p )
{
   struct gl_context *ctx = p->ctx;
   TNLcontext *tnl = TNL_CONTEXT(ctx);
   struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx);
   GLuint j = 0;

   struct x86_reg vertexEAX = x86_make_reg(file_REG32, reg_AX);
   struct x86_reg srcECX = x86_make_reg(file_REG32, reg_CX);
   struct x86_reg countEBP = x86_make_reg(file_REG32, reg_BP);
   struct x86_reg vtxESI = x86_make_reg(file_REG32, reg_SI);
   struct x86_reg temp = x86_make_reg(file_XMM, 0);
   struct x86_reg vp0 = x86_make_reg(file_XMM, 1);
   struct x86_reg vp1 = x86_make_reg(file_XMM, 2);
   struct x86_reg temp2 = x86_make_reg(file_XMM, 3);
   GLubyte *fixup, *label;

   /* Push a few regs?
    */
   x86_push(&p->func, countEBP);
   x86_push(&p->func, vtxESI);


   /* Get vertex count, compare to zero
    */
   x86_xor(&p->func, srcECX, srcECX);
   x86_mov(&p->func, countEBP, x86_fn_arg(&p->func, 2));
   x86_cmp(&p->func, countEBP, srcECX);
   fixup = x86_jcc_forward(&p->func, cc_E);

   /* Initialize destination register. 
    */
   x86_mov(&p->func, vertexEAX, x86_fn_arg(&p->func, 3));

   /* Dereference ctx to get tnl, then vtx:
    */
   x86_mov(&p->func, vtxESI, x86_fn_arg(&p->func, 1));
   x86_mov(&p->func, vtxESI, x86_make_disp(vtxESI, get_offset(ctx, &ctx->swtnl_context)));
   vtxESI = x86_make_disp(vtxESI, get_offset(tnl, &tnl->clipspace));

   
   /* Possibly load vp0, vp1 for viewport calcs:
    */
   if (vtx->need_viewport) {
      sse_movups(&p->func, vp0, x86_make_disp(vtxESI, get_offset(vtx, &vtx->vp_scale[0])));
      sse_movups(&p->func, vp1, x86_make_disp(vtxESI, get_offset(vtx, &vtx->vp_xlate[0])));
   }

   /* always load, needed or not:
    */
   sse_movups(&p->func, p->chan0, x86_make_disp(vtxESI, get_offset(vtx, &vtx->chan_scale[0])));
   sse_movups(&p->func, p->identity, x86_make_disp(vtxESI, get_offset(vtx, &vtx->identity[0])));

   /* Note address for loop jump */
   label = x86_get_label(&p->func);

   /* Emit code for each of the attributes.  Currently routes
    * everything through SSE registers, even when it might be more
    * efficient to stick with regular old x86.  No optimization or
    * other tricks - enough new ground to cover here just getting
    * things working.
    */
   while (j < vtx->attr_count) {
      struct tnl_clipspace_attr *a = &vtx->attr[j];
      struct x86_reg dest = x86_make_disp(vertexEAX, a->vertoffset);

      /* Now, load an XMM reg from src, perhaps transform, then save.
       * Could be shortcircuited in specific cases:
       */
      switch (a->format) {
      case EMIT_1F:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 1, x86_deref(srcECX), a->inputsize);
	 emit_store(p, dest, 1, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_2F:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 2, x86_deref(srcECX), a->inputsize);
	 emit_store(p, dest, 2, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_3F:
	 /* Potentially the worst case - hardcode 2+1 copying:
	  */
	 if (0) {
	    get_src_ptr(p, srcECX, vtxESI, a);
	    emit_load(p, temp, 3, x86_deref(srcECX), a->inputsize);
	    emit_store(p, dest, 3, temp);
	    update_src_ptr(p, srcECX, vtxESI, a);
	 }
	 else {
	    get_src_ptr(p, srcECX, vtxESI, a);
	    emit_load(p, temp, 2, x86_deref(srcECX), a->inputsize);
	    emit_store(p, dest, 2, temp);
	    if (a->inputsize > 2) {
	       emit_load(p, temp, 1, x86_make_disp(srcECX, 8), 1);
	       emit_store(p, x86_make_disp(dest,8), 1, temp);
	    }
	    else {
	       sse_movss(&p->func, x86_make_disp(dest,8), get_identity(p));
	    }
	    update_src_ptr(p, srcECX, vtxESI, a);
	 }
	 break;
      case EMIT_4F:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	 emit_store(p, dest, 4, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_2F_VIEWPORT: 
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 2, x86_deref(srcECX), a->inputsize);
	 sse_mulps(&p->func, temp, vp0);
	 sse_addps(&p->func, temp, vp1);
	 emit_store(p, dest, 2, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_3F_VIEWPORT: 
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 3, x86_deref(srcECX), a->inputsize);
	 sse_mulps(&p->func, temp, vp0);
	 sse_addps(&p->func, temp, vp1);
	 emit_store(p, dest, 3, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_4F_VIEWPORT: 
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	 sse_mulps(&p->func, temp, vp0);
	 sse_addps(&p->func, temp, vp1);
	 emit_store(p, dest, 4, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_3F_XYW:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	 sse_shufps(&p->func, temp, temp, SHUF(X,Y,W,Z));
	 emit_store(p, dest, 3, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;

      case EMIT_1UB_1F:	 
	 /* Test for PAD3 + 1UB:
	  */
	 if (j > 0 &&
	     a[-1].vertoffset + a[-1].vertattrsize <= a->vertoffset - 3)
	 {
	    get_src_ptr(p, srcECX, vtxESI, a);
	    emit_load(p, temp, 1, x86_deref(srcECX), a->inputsize);
	    sse_shufps(&p->func, temp, temp, SHUF(X,X,X,X));
	    emit_pack_store_4ub(p, x86_make_disp(dest, -3), temp); /* overkill! */
	    update_src_ptr(p, srcECX, vtxESI, a);
	 }
	 else {
	    printf("Can't emit 1ub %x %x %d\n", a->vertoffset, a[-1].vertoffset, a[-1].vertattrsize );
	    return GL_FALSE;
	 }
	 break;
      case EMIT_3UB_3F_RGB:
      case EMIT_3UB_3F_BGR:
	 /* Test for 3UB + PAD1:
	  */
	 if (j == vtx->attr_count - 1 ||
	     a[1].vertoffset >= a->vertoffset + 4) {
	    get_src_ptr(p, srcECX, vtxESI, a);
	    emit_load(p, temp, 3, x86_deref(srcECX), a->inputsize);
	    if (a->format == EMIT_3UB_3F_BGR)
	       sse_shufps(&p->func, temp, temp, SHUF(Z,Y,X,W));
	    emit_pack_store_4ub(p, dest, temp);
	    update_src_ptr(p, srcECX, vtxESI, a);
	 }
	 /* Test for 3UB + 1UB:
	  */
	 else if (j < vtx->attr_count - 1 &&
		  a[1].format == EMIT_1UB_1F &&
		  a[1].vertoffset == a->vertoffset + 3) {
	    get_src_ptr(p, srcECX, vtxESI, a);
	    emit_load(p, temp, 3, x86_deref(srcECX), a->inputsize);
	    update_src_ptr(p, srcECX, vtxESI, a);

	    /* Make room for incoming value:
	     */
	    sse_shufps(&p->func, temp, temp, SHUF(W,X,Y,Z));

	    get_src_ptr(p, srcECX, vtxESI, &a[1]);
	    emit_load(p, temp2, 1, x86_deref(srcECX), a[1].inputsize);
	    sse_movss(&p->func, temp, temp2);
	    update_src_ptr(p, srcECX, vtxESI, &a[1]);

	    /* Rearrange and possibly do BGR conversion:
	     */
	    if (a->format == EMIT_3UB_3F_BGR)
	       sse_shufps(&p->func, temp, temp, SHUF(W,Z,Y,X));
	    else
	       sse_shufps(&p->func, temp, temp, SHUF(Y,Z,W,X));

	    emit_pack_store_4ub(p, dest, temp);
	    j++;		/* NOTE: two attrs consumed */
	 }
	 else {
	    printf("Can't emit 3ub\n");
	    return GL_FALSE;	/* add this later */
	 }
	 break;

      case EMIT_4UB_4F_RGBA:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	 emit_pack_store_4ub(p, dest, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_4UB_4F_BGRA:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	 sse_shufps(&p->func, temp, temp, SHUF(Z,Y,X,W));
	 emit_pack_store_4ub(p, dest, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_4UB_4F_ARGB:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	 sse_shufps(&p->func, temp, temp, SHUF(W,X,Y,Z));
	 emit_pack_store_4ub(p, dest, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_4UB_4F_ABGR:
	 get_src_ptr(p, srcECX, vtxESI, a);
	 emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	 sse_shufps(&p->func, temp, temp, SHUF(W,Z,Y,X));
	 emit_pack_store_4ub(p, dest, temp);
	 update_src_ptr(p, srcECX, vtxESI, a);
	 break;
      case EMIT_4CHAN_4F_RGBA:
	 switch (CHAN_TYPE) {
	 case GL_UNSIGNED_BYTE:
	    get_src_ptr(p, srcECX, vtxESI, a);
	    emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	    emit_pack_store_4ub(p, dest, temp);
	    update_src_ptr(p, srcECX, vtxESI, a);
	    break;
	 case GL_FLOAT:
	    get_src_ptr(p, srcECX, vtxESI, a);
	    emit_load(p, temp, 4, x86_deref(srcECX), a->inputsize);
	    emit_store(p, dest, 4, temp);
	    update_src_ptr(p, srcECX, vtxESI, a);
	    break;
	 case GL_UNSIGNED_SHORT:
	 default:
	    printf("unknown CHAN_TYPE %s\n", _mesa_lookup_enum_by_nr(CHAN_TYPE));
	    return GL_FALSE;
	 }
	 break;
      default:
	 printf("unknown a[%d].format %d\n", j, a->format);
	 return GL_FALSE;	/* catch any new opcodes */
      }
      
      /* Increment j by at least 1 - may have been incremented above also:
       */
      j++;
   }

   /* Next vertex:
    */
   x86_lea(&p->func, vertexEAX, x86_make_disp(vertexEAX, vtx->vertex_size));

   /* decr count, loop if not zero
    */
   x86_dec(&p->func, countEBP);
   x86_test(&p->func, countEBP, countEBP); 
   x86_jcc(&p->func, cc_NZ, label);

   /* Exit mmx state?
    */
   if (p->func.need_emms)
      mmx_emms(&p->func);

   /* Land forward jump here:
    */
   x86_fixup_fwd_jump(&p->func, fixup);

   /* Pop regs and return
    */
   x86_pop(&p->func, x86_get_base_reg(vtxESI));
   x86_pop(&p->func, countEBP);
   x86_ret(&p->func);

   assert(!vtx->emit);
   vtx->emit = (tnl_emit_func)x86_get_func(&p->func);

   assert( (char *) p->func.csr - (char *) p->func.store <= MAX_SSE_CODE_SIZE );
   return GL_TRUE;
}
Beispiel #2
0
void x86_cdecl_caller_pop_regs( struct x86_function *p )
{
   x86_pop(p, x86_make_reg(file_REG32, reg_DX));
   x86_pop(p, x86_make_reg(file_REG32, reg_CX));
   x86_pop(p, x86_make_reg(file_REG32, reg_AX));
}
Beispiel #3
0
static int decode_segreg(struct sigcontext *scp)
{
  unsigned cs, eip;
  unsigned char *csp, *orig_csp;
  int ret = -1;
  x86_ins x86;

  x86._32bit = dpmi_mhp_get_selector_size(_cs);
  cs = GetSegmentBase(_cs);
  eip = _eip + x86_handle_prefixes(scp, cs, &x86);
  csp = (unsigned char *)MEM_BASE32(cs + eip);
  orig_csp = (unsigned char *)MEM_BASE32(cs + _eip);

  switch(*csp) {
    case 0x8e:		/* mov segreg,r/m16 */
      ret = sreg_idx(*(unsigned char *)MEM_BASE32(cs + eip + 1) >> 3);
      _eip += instr_len(orig_csp, x86._32bit);
      break;

    case 0xca: /*retf imm 16*/
    case 0xcb: /*retf*/
    case 0xcf: /*iret*/
    {
      unsigned tmp_eip = x86_pop(scp, &x86);
      x86_pop(scp, &x86);
      ret = cs_INDEX;
      switch (*(unsigned char *)MEM_BASE32(cs + eip)) {
        case 0xca: /*retf imm 16*/
	  _esp += ((unsigned short *) (MEM_BASE32(cs + eip + 1)))[0];
	  break;
        case 0xcf: /*iret*/
	  scp->eflags = x86_pop(scp, &x86);
	  break;
      }
      _eip = tmp_eip;
    }
    break;

    case 0xea:			/* jmp seg:off16/off32 */
    {
      unsigned tmp_eip;
      tmp_eip = x86.operand_size == 4 ? READ_DWORDP(MEM_BASE32(cs + eip + 1)) :
		READ_WORDP(MEM_BASE32(cs + eip + 1));
      ret = cs_INDEX;
      _eip = tmp_eip;
    }
    break;

    case 0xc4:		/* les */
      ret = es_INDEX;
      _eip += instr_len(orig_csp, x86._32bit);
      break;

    case 0xc5:		/* lds */
      ret = ds_INDEX;
      _eip += instr_len(orig_csp, x86._32bit);
      break;

    case 0x07:	/* pop es */
    case 0x17:	/* pop ss */
    case 0x1f:	/* pop ds */
      ret = sreg_idx(*(unsigned char *)MEM_BASE32(cs + eip) >> 3);
      x86_pop(scp, &x86);
      _eip = eip + 1;
      break;

    case 0x0f:
      eip++;
      switch (*(unsigned char *)MEM_BASE32(cs + eip)) {
        case 0xa1:	/* pop fs */
        case 0xa9:	/* pop gs */
	  x86_pop(scp, &x86);
	  ret = sreg_idx(*(unsigned char *)MEM_BASE32(cs + eip) >> 3);
	  _eip = eip + 1;
	  break;

	case 0xb2:	/* lss */
	  ret = ss_INDEX;
	  _eip += instr_len(orig_csp, x86._32bit);
	  break;

	case 0xb4:	/* lfs */
	  ret = fs_INDEX;
	  _eip += instr_len(orig_csp, x86._32bit);
	  break;

	case 0xb5:	/* lgs */
	  ret = gs_INDEX;
	  _eip += instr_len(orig_csp, x86._32bit);
	  break;
      }
      break;
  }

  return ret;
}