0,0 → 1,892 |
/* |
* Copyright (C) 2009 Nicolai Haehnle. |
* Copyright 2010 Tom Stellard <tstellar@gmail.com> |
* |
* All Rights Reserved. |
* |
* Permission is hereby granted, free of charge, to any person obtaining |
* a copy of this software and associated documentation files (the |
* "Software"), to deal in the Software without restriction, including |
* without limitation the rights to use, copy, modify, merge, publish, |
* distribute, sublicense, and/or sell copies of the Software, and to |
* permit persons to whom the Software is furnished to do so, subject to |
* the following conditions: |
* |
* The above copyright notice and this permission notice (including the |
* next paragraph) shall be included in all copies or substantial |
* portions of the Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE |
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
* |
*/ |
|
#include "radeon_dataflow.h" |
|
#include "radeon_compiler.h" |
#include "radeon_compiler_util.h" |
#include "radeon_program.h" |
|
struct read_write_mask_data { |
void * UserData; |
rc_read_write_mask_fn Cb; |
}; |
|
static void reads_normal_callback( |
void * userdata, |
struct rc_instruction * fullinst, |
struct rc_src_register * src) |
{ |
struct read_write_mask_data * cb_data = userdata; |
unsigned int refmask = 0; |
unsigned int chan; |
for(chan = 0; chan < 4; chan++) { |
refmask |= 1 << GET_SWZ(src->Swizzle, chan); |
} |
refmask &= RC_MASK_XYZW; |
|
if (refmask) { |
cb_data->Cb(cb_data->UserData, fullinst, src->File, |
src->Index, refmask); |
} |
|
if (refmask && src->RelAddr) { |
cb_data->Cb(cb_data->UserData, fullinst, RC_FILE_ADDRESS, 0, |
RC_MASK_X); |
} |
} |
|
static void pair_get_src_refmasks(unsigned int * refmasks, |
struct rc_pair_instruction * inst, |
unsigned int swz, unsigned int src) |
{ |
if (swz >= 4) |
return; |
|
if (swz == RC_SWIZZLE_X || swz == RC_SWIZZLE_Y || swz == RC_SWIZZLE_Z) { |
if(src == RC_PAIR_PRESUB_SRC) { |
unsigned int i; |
int srcp_regs = |
rc_presubtract_src_reg_count( |
inst->RGB.Src[src].Index); |
for(i = 0; i < srcp_regs; i++) { |
refmasks[i] |= 1 << swz; |
} |
} |
else { |
refmasks[src] |= 1 << swz; |
} |
} |
|
if (swz == RC_SWIZZLE_W) { |
if (src == RC_PAIR_PRESUB_SRC) { |
unsigned int i; |
int srcp_regs = rc_presubtract_src_reg_count( |
inst->Alpha.Src[src].Index); |
for(i = 0; i < srcp_regs; i++) { |
refmasks[i] |= 1 << swz; |
} |
} |
else { |
refmasks[src] |= 1 << swz; |
} |
} |
} |
|
static void reads_pair(struct rc_instruction * fullinst, rc_read_write_mask_fn cb, void * userdata) |
{ |
struct rc_pair_instruction * inst = &fullinst->U.P; |
unsigned int refmasks[3] = { 0, 0, 0 }; |
|
unsigned int arg; |
|
for(arg = 0; arg < 3; ++arg) { |
unsigned int chan; |
for(chan = 0; chan < 3; ++chan) { |
unsigned int swz_rgb = |
GET_SWZ(inst->RGB.Arg[arg].Swizzle, chan); |
unsigned int swz_alpha = |
GET_SWZ(inst->Alpha.Arg[arg].Swizzle, chan); |
pair_get_src_refmasks(refmasks, inst, swz_rgb, |
inst->RGB.Arg[arg].Source); |
pair_get_src_refmasks(refmasks, inst, swz_alpha, |
inst->Alpha.Arg[arg].Source); |
} |
} |
|
for(unsigned int src = 0; src < 3; ++src) { |
if (inst->RGB.Src[src].Used && (refmasks[src] & RC_MASK_XYZ)) |
cb(userdata, fullinst, inst->RGB.Src[src].File, inst->RGB.Src[src].Index, |
refmasks[src] & RC_MASK_XYZ); |
|
if (inst->Alpha.Src[src].Used && (refmasks[src] & RC_MASK_W)) |
cb(userdata, fullinst, inst->Alpha.Src[src].File, inst->Alpha.Src[src].Index, RC_MASK_W); |
} |
} |
|
static void pair_sub_for_all_args( |
struct rc_instruction * fullinst, |
struct rc_pair_sub_instruction * sub, |
rc_pair_read_arg_fn cb, |
void * userdata) |
{ |
int i; |
const struct rc_opcode_info * info = rc_get_opcode_info(sub->Opcode); |
|
for(i = 0; i < info->NumSrcRegs; i++) { |
unsigned int src_type; |
|
src_type = rc_source_type_swz(sub->Arg[i].Swizzle); |
|
if (src_type == RC_SOURCE_NONE) |
continue; |
|
if (sub->Arg[i].Source == RC_PAIR_PRESUB_SRC) { |
unsigned int presub_type; |
unsigned int presub_src_count; |
struct rc_pair_instruction_source * src_array; |
unsigned int j; |
|
if (src_type & RC_SOURCE_RGB) { |
presub_type = fullinst-> |
U.P.RGB.Src[RC_PAIR_PRESUB_SRC].Index; |
src_array = fullinst->U.P.RGB.Src; |
} else { |
presub_type = fullinst-> |
U.P.Alpha.Src[RC_PAIR_PRESUB_SRC].Index; |
src_array = fullinst->U.P.Alpha.Src; |
} |
presub_src_count |
= rc_presubtract_src_reg_count(presub_type); |
for(j = 0; j < presub_src_count; j++) { |
cb(userdata, fullinst, &sub->Arg[i], |
&src_array[j]); |
} |
} else { |
struct rc_pair_instruction_source * src = |
rc_pair_get_src(&fullinst->U.P, &sub->Arg[i]); |
if (src) { |
cb(userdata, fullinst, &sub->Arg[i], src); |
} |
} |
} |
} |
|
/* This function calls the callback function (cb) for each source used by |
* the instruction. |
* */ |
void rc_for_all_reads_src( |
struct rc_instruction * inst, |
rc_read_src_fn cb, |
void * userdata) |
{ |
const struct rc_opcode_info * opcode = |
rc_get_opcode_info(inst->U.I.Opcode); |
|
/* This function only works with normal instructions. */ |
if (inst->Type != RC_INSTRUCTION_NORMAL) { |
assert(0); |
return; |
} |
|
for(unsigned int src = 0; src < opcode->NumSrcRegs; ++src) { |
|
if (inst->U.I.SrcReg[src].File == RC_FILE_NONE) |
continue; |
|
if (inst->U.I.SrcReg[src].File == RC_FILE_PRESUB) { |
unsigned int i; |
unsigned int srcp_regs = rc_presubtract_src_reg_count( |
inst->U.I.PreSub.Opcode); |
for( i = 0; i < srcp_regs; i++) { |
cb(userdata, inst, &inst->U.I.PreSub.SrcReg[i]); |
} |
} else { |
cb(userdata, inst, &inst->U.I.SrcReg[src]); |
} |
} |
} |
|
/** |
* This function calls the callback function (cb) for each arg of the RGB and |
* alpha components. |
*/ |
void rc_pair_for_all_reads_arg( |
struct rc_instruction * inst, |
rc_pair_read_arg_fn cb, |
void * userdata) |
{ |
/* This function only works with pair instructions. */ |
if (inst->Type != RC_INSTRUCTION_PAIR) { |
assert(0); |
return; |
} |
|
pair_sub_for_all_args(inst, &inst->U.P.RGB, cb, userdata); |
pair_sub_for_all_args(inst, &inst->U.P.Alpha, cb, userdata); |
} |
|
/** |
* Calls a callback function for all register reads. |
* |
* This is conservative, i.e. if the same register is referenced multiple times, |
* the callback may also be called multiple times. |
* Also, the writemask of the instruction is not taken into account. |
*/ |
void rc_for_all_reads_mask(struct rc_instruction * inst, rc_read_write_mask_fn cb, void * userdata) |
{ |
if (inst->Type == RC_INSTRUCTION_NORMAL) { |
struct read_write_mask_data cb_data; |
cb_data.UserData = userdata; |
cb_data.Cb = cb; |
|
rc_for_all_reads_src(inst, reads_normal_callback, &cb_data); |
} else { |
reads_pair(inst, cb, userdata); |
} |
} |
|
|
|
static void writes_normal(struct rc_instruction * fullinst, rc_read_write_mask_fn cb, void * userdata) |
{ |
struct rc_sub_instruction * inst = &fullinst->U.I; |
const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->Opcode); |
|
if (opcode->HasDstReg && inst->DstReg.WriteMask) |
cb(userdata, fullinst, inst->DstReg.File, inst->DstReg.Index, inst->DstReg.WriteMask); |
|
if (inst->WriteALUResult) |
cb(userdata, fullinst, RC_FILE_SPECIAL, RC_SPECIAL_ALU_RESULT, RC_MASK_X); |
} |
|
static void writes_pair(struct rc_instruction * fullinst, rc_read_write_mask_fn cb, void * userdata) |
{ |
struct rc_pair_instruction * inst = &fullinst->U.P; |
|
if (inst->RGB.WriteMask) |
cb(userdata, fullinst, RC_FILE_TEMPORARY, inst->RGB.DestIndex, inst->RGB.WriteMask); |
|
if (inst->Alpha.WriteMask) |
cb(userdata, fullinst, RC_FILE_TEMPORARY, inst->Alpha.DestIndex, RC_MASK_W); |
|
if (inst->WriteALUResult) |
cb(userdata, fullinst, RC_FILE_SPECIAL, RC_SPECIAL_ALU_RESULT, RC_MASK_X); |
} |
|
/** |
* Calls a callback function for all register writes in the instruction, |
* reporting writemasks to the callback function. |
* |
* \warning Does not report output registers for paired instructions! |
*/ |
void rc_for_all_writes_mask(struct rc_instruction * inst, rc_read_write_mask_fn cb, void * userdata) |
{ |
if (inst->Type == RC_INSTRUCTION_NORMAL) { |
writes_normal(inst, cb, userdata); |
} else { |
writes_pair(inst, cb, userdata); |
} |
} |
|
|
struct mask_to_chan_data { |
void * UserData; |
rc_read_write_chan_fn Fn; |
}; |
|
static void mask_to_chan_cb(void * data, struct rc_instruction * inst, |
rc_register_file file, unsigned int index, unsigned int mask) |
{ |
struct mask_to_chan_data * d = data; |
for(unsigned int chan = 0; chan < 4; ++chan) { |
if (GET_BIT(mask, chan)) |
d->Fn(d->UserData, inst, file, index, chan); |
} |
} |
|
/** |
* Calls a callback function for all sourced register channels. |
* |
* This is conservative, i.e. channels may be called multiple times, |
* and the writemask of the instruction is not taken into account. |
*/ |
void rc_for_all_reads_chan(struct rc_instruction * inst, rc_read_write_chan_fn cb, void * userdata) |
{ |
struct mask_to_chan_data d; |
d.UserData = userdata; |
d.Fn = cb; |
rc_for_all_reads_mask(inst, &mask_to_chan_cb, &d); |
} |
|
/** |
* Calls a callback function for all written register channels. |
* |
* \warning Does not report output registers for paired instructions! |
*/ |
void rc_for_all_writes_chan(struct rc_instruction * inst, rc_read_write_chan_fn cb, void * userdata) |
{ |
struct mask_to_chan_data d; |
d.UserData = userdata; |
d.Fn = cb; |
rc_for_all_writes_mask(inst, &mask_to_chan_cb, &d); |
} |
|
static void remap_normal_instruction(struct rc_instruction * fullinst, |
rc_remap_register_fn cb, void * userdata) |
{ |
struct rc_sub_instruction * inst = &fullinst->U.I; |
const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->Opcode); |
unsigned int remapped_presub = 0; |
|
if (opcode->HasDstReg) { |
rc_register_file file = inst->DstReg.File; |
unsigned int index = inst->DstReg.Index; |
|
cb(userdata, fullinst, &file, &index); |
|
inst->DstReg.File = file; |
inst->DstReg.Index = index; |
} |
|
for(unsigned int src = 0; src < opcode->NumSrcRegs; ++src) { |
rc_register_file file = inst->SrcReg[src].File; |
unsigned int index = inst->SrcReg[src].Index; |
|
if (file == RC_FILE_PRESUB) { |
unsigned int i; |
unsigned int srcp_srcs = rc_presubtract_src_reg_count( |
inst->PreSub.Opcode); |
/* Make sure we only remap presubtract sources once in |
* case more than one source register reads the |
* presubtract result. */ |
if (remapped_presub) |
continue; |
|
for(i = 0; i < srcp_srcs; i++) { |
file = inst->PreSub.SrcReg[i].File; |
index = inst->PreSub.SrcReg[i].Index; |
cb(userdata, fullinst, &file, &index); |
inst->PreSub.SrcReg[i].File = file; |
inst->PreSub.SrcReg[i].Index = index; |
} |
remapped_presub = 1; |
} |
else { |
cb(userdata, fullinst, &file, &index); |
|
inst->SrcReg[src].File = file; |
inst->SrcReg[src].Index = index; |
} |
} |
} |
|
static void remap_pair_instruction(struct rc_instruction * fullinst, |
rc_remap_register_fn cb, void * userdata) |
{ |
struct rc_pair_instruction * inst = &fullinst->U.P; |
|
if (inst->RGB.WriteMask) { |
rc_register_file file = RC_FILE_TEMPORARY; |
unsigned int index = inst->RGB.DestIndex; |
|
cb(userdata, fullinst, &file, &index); |
|
inst->RGB.DestIndex = index; |
} |
|
if (inst->Alpha.WriteMask) { |
rc_register_file file = RC_FILE_TEMPORARY; |
unsigned int index = inst->Alpha.DestIndex; |
|
cb(userdata, fullinst, &file, &index); |
|
inst->Alpha.DestIndex = index; |
} |
|
for(unsigned int src = 0; src < 3; ++src) { |
if (inst->RGB.Src[src].Used) { |
rc_register_file file = inst->RGB.Src[src].File; |
unsigned int index = inst->RGB.Src[src].Index; |
|
cb(userdata, fullinst, &file, &index); |
|
inst->RGB.Src[src].File = file; |
inst->RGB.Src[src].Index = index; |
} |
|
if (inst->Alpha.Src[src].Used) { |
rc_register_file file = inst->Alpha.Src[src].File; |
unsigned int index = inst->Alpha.Src[src].Index; |
|
cb(userdata, fullinst, &file, &index); |
|
inst->Alpha.Src[src].File = file; |
inst->Alpha.Src[src].Index = index; |
} |
} |
} |
|
|
/** |
* Remap all register accesses according to the given function. |
* That is, call the function \p cb for each referenced register (both read and written) |
* and update the given instruction \p inst accordingly |
* if it modifies its \ref pfile and \ref pindex contents. |
*/ |
void rc_remap_registers(struct rc_instruction * inst, rc_remap_register_fn cb, void * userdata) |
{ |
if (inst->Type == RC_INSTRUCTION_NORMAL) |
remap_normal_instruction(inst, cb, userdata); |
else |
remap_pair_instruction(inst, cb, userdata); |
} |
|
struct branch_write_mask { |
unsigned int IfWriteMask:4; |
unsigned int ElseWriteMask:4; |
unsigned int HasElse:1; |
}; |
|
union get_readers_read_cb { |
rc_read_src_fn I; |
rc_pair_read_arg_fn P; |
}; |
|
struct get_readers_callback_data { |
struct radeon_compiler * C; |
struct rc_reader_data * ReaderData; |
rc_read_src_fn ReadNormalCB; |
rc_pair_read_arg_fn ReadPairCB; |
rc_read_write_mask_fn WriteCB; |
rc_register_file DstFile; |
unsigned int DstIndex; |
unsigned int DstMask; |
unsigned int AliveWriteMask; |
/* For convenience, this is indexed starting at 1 */ |
struct branch_write_mask BranchMasks[R500_PFS_MAX_BRANCH_DEPTH_FULL + 1]; |
}; |
|
static struct rc_reader * add_reader( |
struct memory_pool * pool, |
struct rc_reader_data * data, |
struct rc_instruction * inst, |
unsigned int mask) |
{ |
struct rc_reader * new; |
memory_pool_array_reserve(pool, struct rc_reader, data->Readers, |
data->ReaderCount, data->ReadersReserved, 1); |
new = &data->Readers[data->ReaderCount++]; |
new->Inst = inst; |
new->WriteMask = mask; |
return new; |
} |
|
static void add_reader_normal( |
struct memory_pool * pool, |
struct rc_reader_data * data, |
struct rc_instruction * inst, |
unsigned int mask, |
struct rc_src_register * src) |
{ |
struct rc_reader * new = add_reader(pool, data, inst, mask); |
new->U.I.Src = src; |
} |
|
|
static void add_reader_pair( |
struct memory_pool * pool, |
struct rc_reader_data * data, |
struct rc_instruction * inst, |
unsigned int mask, |
struct rc_pair_instruction_arg * arg, |
struct rc_pair_instruction_source * src) |
{ |
struct rc_reader * new = add_reader(pool, data, inst, mask); |
new->U.P.Src = src; |
new->U.P.Arg = arg; |
} |
|
static unsigned int get_readers_read_callback( |
struct get_readers_callback_data * cb_data, |
unsigned int has_rel_addr, |
rc_register_file file, |
unsigned int index, |
unsigned int swizzle) |
{ |
unsigned int shared_mask, read_mask; |
|
if (has_rel_addr) { |
cb_data->ReaderData->Abort = 1; |
return RC_MASK_NONE; |
} |
|
shared_mask = rc_src_reads_dst_mask(file, index, swizzle, |
cb_data->DstFile, cb_data->DstIndex, cb_data->AliveWriteMask); |
|
if (shared_mask == RC_MASK_NONE) |
return shared_mask; |
|
/* If we make it this far, it means that this source reads from the |
* same register written to by d->ReaderData->Writer. */ |
|
read_mask = rc_swizzle_to_writemask(swizzle); |
if (cb_data->ReaderData->AbortOnRead & read_mask) { |
cb_data->ReaderData->Abort = 1; |
return shared_mask; |
} |
|
if (cb_data->ReaderData->LoopDepth > 0) { |
cb_data->ReaderData->AbortOnWrite |= |
(read_mask & cb_data->AliveWriteMask); |
} |
|
/* XXX The behavior in this case should be configurable. */ |
if ((read_mask & cb_data->AliveWriteMask) != read_mask) { |
cb_data->ReaderData->Abort = 1; |
return shared_mask; |
} |
|
return shared_mask; |
} |
|
static void get_readers_pair_read_callback( |
void * userdata, |
struct rc_instruction * inst, |
struct rc_pair_instruction_arg * arg, |
struct rc_pair_instruction_source * src) |
{ |
unsigned int shared_mask; |
struct get_readers_callback_data * d = userdata; |
|
shared_mask = get_readers_read_callback(d, |
0 /*Pair Instructions don't use RelAddr*/, |
src->File, src->Index, arg->Swizzle); |
|
if (shared_mask == RC_MASK_NONE) |
return; |
|
if (d->ReadPairCB) |
d->ReadPairCB(d->ReaderData, inst, arg, src); |
|
if (d->ReaderData->ExitOnAbort && d->ReaderData->Abort) |
return; |
|
add_reader_pair(&d->C->Pool, d->ReaderData, inst, shared_mask, arg, src); |
} |
|
/** |
* This function is used by rc_get_readers_normal() to determine whether inst |
* is a reader of userdata->ReaderData->Writer |
*/ |
static void get_readers_normal_read_callback( |
void * userdata, |
struct rc_instruction * inst, |
struct rc_src_register * src) |
{ |
struct get_readers_callback_data * d = userdata; |
unsigned int shared_mask; |
|
shared_mask = get_readers_read_callback(d, |
src->RelAddr, src->File, src->Index, src->Swizzle); |
|
if (shared_mask == RC_MASK_NONE) |
return; |
/* The callback function could potentially clear d->ReaderData->Abort, |
* so we need to call it before we return. */ |
if (d->ReadNormalCB) |
d->ReadNormalCB(d->ReaderData, inst, src); |
|
if (d->ReaderData->ExitOnAbort && d->ReaderData->Abort) |
return; |
|
add_reader_normal(&d->C->Pool, d->ReaderData, inst, shared_mask, src); |
} |
|
/** |
* This function is used by rc_get_readers_normal() to determine when |
* userdata->ReaderData->Writer is dead (i. e. All compontents of its |
* destination register have been overwritten by other instructions). |
*/ |
static void get_readers_write_callback( |
void *userdata, |
struct rc_instruction * inst, |
rc_register_file file, |
unsigned int index, |
unsigned int mask) |
{ |
struct get_readers_callback_data * d = userdata; |
|
if (index == d->DstIndex && file == d->DstFile) { |
unsigned int shared_mask = mask & d->DstMask; |
d->ReaderData->AbortOnRead &= ~shared_mask; |
d->AliveWriteMask &= ~shared_mask; |
if (d->ReaderData->AbortOnWrite & shared_mask) { |
d->ReaderData->Abort = 1; |
} |
} |
|
if(d->WriteCB) |
d->WriteCB(d->ReaderData, inst, file, index, mask); |
} |
|
static void push_branch_mask( |
struct get_readers_callback_data * d, |
unsigned int * branch_depth) |
{ |
(*branch_depth)++; |
if (*branch_depth > R500_PFS_MAX_BRANCH_DEPTH_FULL) { |
d->ReaderData->Abort = 1; |
return; |
} |
d->BranchMasks[*branch_depth].IfWriteMask = |
d->AliveWriteMask; |
} |
|
static void pop_branch_mask( |
struct get_readers_callback_data * d, |
unsigned int * branch_depth) |
{ |
struct branch_write_mask * masks = &d->BranchMasks[*branch_depth]; |
|
if (masks->HasElse) { |
/* Abort on read for components that were written in the IF |
* block. */ |
d->ReaderData->AbortOnRead |= |
masks->IfWriteMask & ~masks->ElseWriteMask; |
/* Abort on read for components that were written in the ELSE |
* block. */ |
d->ReaderData->AbortOnRead |= |
masks->ElseWriteMask & ~d->AliveWriteMask; |
|
d->AliveWriteMask = masks->IfWriteMask |
^ ((masks->IfWriteMask ^ masks->ElseWriteMask) |
& (masks->IfWriteMask ^ d->AliveWriteMask)); |
} else { |
d->ReaderData->AbortOnRead |= |
masks->IfWriteMask & ~d->AliveWriteMask; |
d->AliveWriteMask = masks->IfWriteMask; |
|
} |
memset(masks, 0, sizeof(struct branch_write_mask)); |
(*branch_depth)--; |
} |
|
static void get_readers_for_single_write( |
void * userdata, |
struct rc_instruction * writer, |
rc_register_file dst_file, |
unsigned int dst_index, |
unsigned int dst_mask) |
{ |
struct rc_instruction * tmp; |
unsigned int branch_depth = 0; |
struct rc_instruction * endloop = NULL; |
unsigned int abort_on_read_at_endloop = 0; |
struct get_readers_callback_data * d = userdata; |
|
d->ReaderData->Writer = writer; |
d->ReaderData->AbortOnRead = 0; |
d->ReaderData->AbortOnWrite = 0; |
d->ReaderData->LoopDepth = 0; |
d->ReaderData->InElse = 0; |
d->DstFile = dst_file; |
d->DstIndex = dst_index; |
d->DstMask = dst_mask; |
d->AliveWriteMask = dst_mask; |
memset(d->BranchMasks, 0, sizeof(d->BranchMasks)); |
|
if (!dst_mask) |
return; |
|
for(tmp = writer->Next; tmp != &d->C->Program.Instructions; |
tmp = tmp->Next){ |
rc_opcode opcode = rc_get_flow_control_inst(tmp); |
switch(opcode) { |
case RC_OPCODE_BGNLOOP: |
d->ReaderData->LoopDepth++; |
push_branch_mask(d, &branch_depth); |
break; |
case RC_OPCODE_ENDLOOP: |
if (d->ReaderData->LoopDepth > 0) { |
d->ReaderData->LoopDepth--; |
if (d->ReaderData->LoopDepth == 0) { |
d->ReaderData->AbortOnWrite = 0; |
} |
pop_branch_mask(d, &branch_depth); |
} else { |
/* Here we have reached an ENDLOOP without |
* seeing its BGNLOOP. These means that |
* the writer was written inside of a loop, |
* so it could have readers that are above it |
* (i.e. they have a lower IP). To find these |
* readers we jump to the BGNLOOP instruction |
* and check each instruction until we get |
* back to the writer. |
*/ |
endloop = tmp; |
tmp = rc_match_endloop(tmp); |
if (!tmp) { |
rc_error(d->C, "Failed to match endloop.\n"); |
d->ReaderData->Abort = 1; |
return; |
} |
abort_on_read_at_endloop = d->ReaderData->AbortOnRead; |
d->ReaderData->AbortOnRead |= d->AliveWriteMask; |
continue; |
} |
break; |
case RC_OPCODE_IF: |
push_branch_mask(d, &branch_depth); |
break; |
case RC_OPCODE_ELSE: |
if (branch_depth == 0) { |
d->ReaderData->InElse = 1; |
} else { |
unsigned int temp_mask = d->AliveWriteMask; |
d->AliveWriteMask = |
d->BranchMasks[branch_depth].IfWriteMask; |
d->BranchMasks[branch_depth].ElseWriteMask = |
temp_mask; |
d->BranchMasks[branch_depth].HasElse = 1; |
} |
break; |
case RC_OPCODE_ENDIF: |
if (branch_depth == 0) { |
d->ReaderData->AbortOnRead = d->AliveWriteMask; |
d->ReaderData->InElse = 0; |
} |
else { |
pop_branch_mask(d, &branch_depth); |
} |
break; |
default: |
break; |
} |
|
if (d->ReaderData->InElse) |
continue; |
|
if (tmp->Type == RC_INSTRUCTION_NORMAL) { |
rc_for_all_reads_src(tmp, |
get_readers_normal_read_callback, d); |
} else { |
rc_pair_for_all_reads_arg(tmp, |
get_readers_pair_read_callback, d); |
} |
|
/* This can happen when we jump from an ENDLOOP to BGNLOOP */ |
if (tmp == writer) { |
tmp = endloop; |
endloop = NULL; |
d->ReaderData->AbortOnRead = abort_on_read_at_endloop; |
continue; |
} |
rc_for_all_writes_mask(tmp, get_readers_write_callback, d); |
|
if (d->ReaderData->ExitOnAbort && d->ReaderData->Abort) |
return; |
|
if (branch_depth == 0 && !d->AliveWriteMask) |
return; |
} |
} |
|
static void init_get_readers_callback_data( |
struct get_readers_callback_data * d, |
struct rc_reader_data * reader_data, |
struct radeon_compiler * c, |
rc_read_src_fn read_normal_cb, |
rc_pair_read_arg_fn read_pair_cb, |
rc_read_write_mask_fn write_cb) |
{ |
reader_data->Abort = 0; |
reader_data->ReaderCount = 0; |
reader_data->ReadersReserved = 0; |
reader_data->Readers = NULL; |
|
d->C = c; |
d->ReaderData = reader_data; |
d->ReadNormalCB = read_normal_cb; |
d->ReadPairCB = read_pair_cb; |
d->WriteCB = write_cb; |
} |
|
/** |
* This function will create a list of readers via the rc_reader_data struct. |
* This function will abort (set the flag data->Abort) and return if it |
* encounters an instruction that reads from @param writer and also a different |
* instruction. Here are some examples: |
* |
* writer = instruction 0; |
* 0 MOV TEMP[0].xy, TEMP[1].xy |
* 1 MOV TEMP[0].zw, TEMP[2].xy |
* 2 MOV TEMP[3], TEMP[0] |
* The Abort flag will be set on instruction 2, because it reads values written |
* by instructions 0 and 1. |
* |
* writer = instruction 1; |
* 0 IF TEMP[0].x |
* 1 MOV TEMP[1], TEMP[2] |
* 2 ELSE |
* 3 MOV TEMP[1], TEMP[2] |
* 4 ENDIF |
* 5 MOV TEMP[3], TEMP[1] |
* The Abort flag will be set on instruction 5, because it could read from the |
* value written by either instruction 1 or 3, depending on the jump decision |
* made at instruction 0. |
* |
* writer = instruction 0; |
* 0 MOV TEMP[0], TEMP[1] |
* 2 BGNLOOP |
* 3 ADD TEMP[0], TEMP[0], none.1 |
* 4 ENDLOOP |
* The Abort flag will be set on instruction 3, because in the first iteration |
* of the loop it reads the value written by instruction 0 and in all other |
* iterations it reads the value written by instruction 3. |
* |
* @param read_cb This function will be called for for every instruction that |
* has been determined to be a reader of writer. |
* @param write_cb This function will be called for every instruction after |
* writer. |
*/ |
void rc_get_readers( |
struct radeon_compiler * c, |
struct rc_instruction * writer, |
struct rc_reader_data * data, |
rc_read_src_fn read_normal_cb, |
rc_pair_read_arg_fn read_pair_cb, |
rc_read_write_mask_fn write_cb) |
{ |
struct get_readers_callback_data d; |
|
init_get_readers_callback_data(&d, data, c, read_normal_cb, |
read_pair_cb, write_cb); |
|
rc_for_all_writes_mask(writer, get_readers_for_single_write, &d); |
} |
|
void rc_get_readers_sub( |
struct radeon_compiler * c, |
struct rc_instruction * writer, |
struct rc_pair_sub_instruction * sub_writer, |
struct rc_reader_data * data, |
rc_read_src_fn read_normal_cb, |
rc_pair_read_arg_fn read_pair_cb, |
rc_read_write_mask_fn write_cb) |
{ |
struct get_readers_callback_data d; |
|
init_get_readers_callback_data(&d, data, c, read_normal_cb, |
read_pair_cb, write_cb); |
|
if (sub_writer->WriteMask) { |
get_readers_for_single_write(&d, writer, RC_FILE_TEMPORARY, |
sub_writer->DestIndex, sub_writer->WriteMask); |
} |
} |