diff options
Diffstat (limited to 'src/gallium/drivers/i965/brw_eu.c')
| -rw-r--r-- | src/gallium/drivers/i965/brw_eu.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_eu.c b/src/gallium/drivers/i965/brw_eu.c new file mode 100644 index 00000000000..a8fcb5f97eb --- /dev/null +++ b/src/gallium/drivers/i965/brw_eu.c @@ -0,0 +1,262 @@ +/* + Copyright (C) Intel Corp. 2006. All Rights Reserved. + Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to + develop this 3D driver. + + 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. + + **********************************************************************/ + /* + * Authors: + * Keith Whitwell <[email protected]> + */ + +#include "util/u_memory.h" + +#include "brw_context.h" +#include "brw_defines.h" +#include "brw_eu.h" + + + +/* How does predicate control work when execution_size != 8? Do I + * need to test/set for 0xffff when execution_size is 16? + */ +void brw_set_predicate_control_flag_value( struct brw_compile *p, GLuint value ) +{ + p->current->header.predicate_control = BRW_PREDICATE_NONE; + + if (value != 0xff) { + if (value != p->flag_value) { + brw_push_insn_state(p); + brw_MOV(p, brw_flag_reg(), brw_imm_uw(value)); + p->flag_value = value; + brw_pop_insn_state(p); + } + + p->current->header.predicate_control = BRW_PREDICATE_NORMAL; + } +} + +void brw_set_predicate_control( struct brw_compile *p, GLuint pc ) +{ + p->current->header.predicate_control = pc; +} + +void brw_set_conditionalmod( struct brw_compile *p, GLuint conditional ) +{ + p->current->header.destreg__conditionalmod = conditional; +} + +void brw_set_access_mode( struct brw_compile *p, GLuint access_mode ) +{ + p->current->header.access_mode = access_mode; +} + +void brw_set_compression_control( struct brw_compile *p, GLboolean compression_control ) +{ + p->current->header.compression_control = compression_control; +} + +void brw_set_mask_control( struct brw_compile *p, GLuint value ) +{ + p->current->header.mask_control = value; +} + +void brw_set_saturate( struct brw_compile *p, GLuint value ) +{ + p->current->header.saturate = value; +} + +void brw_push_insn_state( struct brw_compile *p ) +{ + assert(p->current != &p->stack[BRW_EU_MAX_INSN_STACK-1]); + memcpy(p->current+1, p->current, sizeof(struct brw_instruction)); + p->current++; +} + +void brw_pop_insn_state( struct brw_compile *p ) +{ + assert(p->current != p->stack); + p->current--; +} + + +/*********************************************************************** + */ +void brw_init_compile( struct brw_context *brw, struct brw_compile *p ) +{ + p->brw = brw; + p->nr_insn = 0; + p->current = p->stack; + memset(p->current, 0, sizeof(p->current[0])); + + /* Some defaults? + */ + brw_set_mask_control(p, BRW_MASK_ENABLE); /* what does this do? */ + brw_set_saturate(p, 0); + brw_set_compression_control(p, BRW_COMPRESSION_NONE); + brw_set_predicate_control_flag_value(p, 0xff); +} + + +enum pipe_error brw_get_program( struct brw_compile *p, + const GLuint **data, + GLuint *sz ) +{ + GLuint i; + + for (i = 0; i < 8; i++) + brw_NOP(p); + + /* Is the generated program malformed for some reason? + */ + if (p->error) + return PIPE_ERROR_BAD_INPUT; + + *sz = p->nr_insn * sizeof(struct brw_instruction); + *data = (const GLuint *)p->store; + return PIPE_OK; +} + + + +/** + * Subroutine calls require special attention. + * Mesa instructions may be expanded into multiple hardware instructions + * so the prog_instruction::BranchTarget field can't be used as an index + * into the hardware instructions. + * + * The BranchTarget field isn't needed, however. Mesa's GLSL compiler + * emits CAL and BGNSUB instructions with labels that can be used to map + * subroutine calls to actual subroutine code blocks. + * + * The structures and function here implement patching of CAL instructions + * so they jump to the right subroutine code... + */ + + +/** + * For each OPCODE_BGNSUB we create one of these. + */ +struct brw_eu_label +{ + GLuint label; /**< the label number */ + GLuint position; /**< the position of the brw instruction for this label */ + struct brw_eu_label *next; /**< next in linked list */ +}; + + +/** + * For each OPCODE_CAL we create one of these. + */ +struct brw_eu_call +{ + GLuint call_inst_pos; /**< location of the CAL instruction */ + GLuint label; + struct brw_eu_call *next; /**< next in linked list */ +}; + + +/** + * Called for each OPCODE_BGNSUB. + */ +void +brw_save_label(struct brw_compile *c, unsigned l, GLuint position) +{ + struct brw_eu_label *label = CALLOC_STRUCT(brw_eu_label); + label->label = l; + label->position = position; + label->next = c->first_label; + c->first_label = label; +} + + +/** + * Called for each OPCODE_CAL. + */ +void +brw_save_call(struct brw_compile *c, GLuint label, GLuint call_pos) +{ + struct brw_eu_call *call = CALLOC_STRUCT(brw_eu_call); + call->call_inst_pos = call_pos; + call->label = label; + call->next = c->first_call; + c->first_call = call; +} + + +/** + * Lookup a label, return label's position/offset. + */ +static GLuint +brw_lookup_label(struct brw_compile *c, unsigned l) +{ + const struct brw_eu_label *label; + for (label = c->first_label; label; label = label->next) { + if (l == label->label) { + return label->position; + } + } + abort(); /* should never happen */ + return ~0; +} + + +/** + * When we're done generating code, this function is called to resolve + * subroutine calls. + */ +void +brw_resolve_cals(struct brw_compile *c) +{ + const struct brw_eu_call *call; + + for (call = c->first_call; call; call = call->next) { + const GLuint sub_loc = brw_lookup_label(c, call->label); + struct brw_instruction *brw_call_inst = &c->store[call->call_inst_pos]; + struct brw_instruction *brw_sub_inst = &c->store[sub_loc]; + GLint offset = brw_sub_inst - brw_call_inst; + + /* patch brw_inst1 to point to brw_inst2 */ + brw_set_src1(brw_call_inst, brw_imm_d(offset * 16)); + } + + /* free linked list of calls */ + { + struct brw_eu_call *call, *next; + for (call = c->first_call; call; call = next) { + next = call->next; + FREE(call); + } + c->first_call = NULL; + } + + /* free linked list of labels */ + { + struct brw_eu_label *label, *next; + for (label = c->first_label; label; label = next) { + next = label->next; + FREE(label); + } + c->first_label = NULL; + } +} |