void x86_jcc( struct x86_function *p,
enum x86_cc cc,
int label )
{
int offset = label - (x86_get_label(p) + 2);
DUMP_I(cc);
if (offset < 0) {
/*assert(p->csr - p->store > -offset);*/
if (p->csr - p->store <= -offset) {
/* probably out of memory (using the error_overflow buffer) */
return;
}
}
if (offset <= 127 && offset >= -128) {
emit_1ub(p, 0x70 + cc);
emit_1b(p, (char) offset);
}
else {
offset = label - (x86_get_label(p) + 6);
emit_2ub(p, 0x0f, 0x80 + cc);
emit_1i(p, offset);
}
}
int x86_jmp_forward( struct x86_function *p)
{
DUMP();
emit_1ub(p, 0xe9);
emit_1i(p, 0);
return x86_get_label(p);
}
/* Always use a 32bit offset for forward jumps:
*/
unsigned char *x86_jcc_forward( struct x86_function *p,
enum x86_cc cc )
{
emit_2ub(p, 0x0f, 0x80 + cc);
emit_1i(p, 0);
return x86_get_label(p);
}
void x86_jcc( struct x86_function *p,
enum x86_cc cc,
unsigned char *label )
{
int offset = label - (x86_get_label(p) + 2);
if (offset <= 127 && offset >= -128) {
emit_1ub(p, 0x70 + cc);
emit_1b(p, (char) offset);
}
else {
offset = label - (x86_get_label(p) + 6);
emit_2ub(p, 0x0f, 0x80 + cc);
emit_1i(p, offset);
}
}
/* Always use a 32bit offset for forward jumps:
*/
int x86_jcc_forward( struct x86_function *p,
enum x86_cc cc )
{
DUMP_I(cc);
emit_2ub(p, 0x0f, 0x80 + cc);
emit_1i(p, 0);
return x86_get_label(p);
}
void x86_jmp( struct x86_function *p, int label)
{
DUMP_I( label );
emit_1ub(p, 0xe9);
emit_1i(p, label - x86_get_label(p) - 4);
}
/* Fixup offset from forward jump:
*/
void x86_fixup_fwd_jump( struct x86_function *p,
int fixup )
{
*(int *)(p->store + fixup - 4) = x86_get_label(p) - fixup;
}
/* This doesn't work once we start reallocating & copying the
* generated code on buffer fills, because the call is relative to the
* current pc.
*/
void x86_call( struct x86_function *p, void (*label)())
{
emit_1ub(p, 0xe8);
emit_1i(p, cptr(label) - x86_get_label(p) - 4);
}
void x86_jmp( struct x86_function *p, unsigned char *label)
{
emit_1ub(p, 0xe9);
emit_1i(p, label - x86_get_label(p) - 4);
}
/* Fixup offset from forward jump:
*/
void x86_fixup_fwd_jump( struct x86_function *p,
unsigned char *fixup )
{
*(int *)(fixup - 4) = x86_get_label(p) - fixup;
}
unsigned char *x86_call_forward( struct x86_function *p)
{
emit_1ub(p, 0xe8);
emit_1i(p, 0);
return x86_get_label(p);
}
/* 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;
}