/* 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;
}
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));
}
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;
}