[Mesa-dev] [PATCH 8/8] i965: Add support for instruction compression on Gen7.
Eric Anholt
eric at anholt.net
Fri Aug 31 11:32:41 PDT 2012
From: Kenneth Graunke <kenneth at whitecape.org>
Reduces l4d2 program size from 1195kb to 919kb.
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
src/mesa/drivers/dri/i965/brw_eu.c | 2 +
src/mesa/drivers/dri/i965/brw_eu.h | 1 +
src/mesa/drivers/dri/i965/brw_eu_compact.c | 208 +++++++++++++++++++++++++---
3 files changed, 192 insertions(+), 19 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_eu.c b/src/mesa/drivers/dri/i965/brw_eu.c
index c2515eb..a59b83f 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.c
+++ b/src/mesa/drivers/dri/i965/brw_eu.c
@@ -206,6 +206,8 @@ brw_init_compile(struct brw_context *brw, struct brw_compile *p, void *mem_ctx)
p->loop_stack_array_size = 16;
p->loop_stack = rzalloc_array(mem_ctx, int, p->loop_stack_array_size);
p->if_depth_in_loop = rzalloc_array(mem_ctx, int, p->loop_stack_array_size);
+
+ brw_init_compaction_tables(&brw->intel);
}
diff --git a/src/mesa/drivers/dri/i965/brw_eu.h b/src/mesa/drivers/dri/i965/brw_eu.h
index 01b8d08..b64611e 100644
--- a/src/mesa/drivers/dri/i965/brw_eu.h
+++ b/src/mesa/drivers/dri/i965/brw_eu.h
@@ -1108,6 +1108,7 @@ void brw_set_uip_jip(struct brw_compile *p);
uint32_t brw_swap_cmod(uint32_t cmod);
/* brw_eu_compact.c */
+void brw_init_compaction_tables(struct intel_context *intel);
void brw_compact_instructions(struct brw_compile *c);
void brw_uncompact_instruction(struct intel_context *intel,
struct brw_instruction *dst,
diff --git a/src/mesa/drivers/dri/i965/brw_eu_compact.c b/src/mesa/drivers/dri/i965/brw_eu_compact.c
index dd661f5..009c961 100644
--- a/src/mesa/drivers/dri/i965/brw_eu_compact.c
+++ b/src/mesa/drivers/dri/i965/brw_eu_compact.c
@@ -180,6 +180,151 @@ static const uint32_t gen6_src_index_table[32] = {
0b001101010000,
};
+static const uint32_t gen7_control_index_table[32] = {
+ 0b0000000000000000010,
+ 0b0000100000000000000,
+ 0b0000100000000000001,
+ 0b0000100000000000010,
+ 0b0000100000000000011,
+ 0b0000100000000000100,
+ 0b0000100000000000101,
+ 0b0000100000000000111,
+ 0b0000100000000001000,
+ 0b0000100000000001001,
+ 0b0000100000000001101,
+ 0b0000110000000000000,
+ 0b0000110000000000001,
+ 0b0000110000000000010,
+ 0b0000110000000000011,
+ 0b0000110000000000100,
+ 0b0000110000000000101,
+ 0b0000110000000000111,
+ 0b0000110000000001001,
+ 0b0000110000000001101,
+ 0b0000110000000010000,
+ 0b0000110000100000000,
+ 0b0001000000000000000,
+ 0b0001000000000000010,
+ 0b0001000000000000100,
+ 0b0001000000100000000,
+ 0b0010110000000000000,
+ 0b0010110000000010000,
+ 0b0011000000000000000,
+ 0b0011000000100000000,
+ 0b0101000000000000000,
+ 0b0101000000100000000
+};
+
+static const uint32_t gen7_datatype_table[32] = {
+ 0b001000000000000001,
+ 0b001000000000100000,
+ 0b001000000000100001,
+ 0b001000000001100001,
+ 0b001000000010111101,
+ 0b001000001011111101,
+ 0b001000001110100001,
+ 0b001000001110100101,
+ 0b001000001110111101,
+ 0b001000010000100001,
+ 0b001000110000100000,
+ 0b001000110000100001,
+ 0b001001010010100101,
+ 0b001001110010100100,
+ 0b001001110010100101,
+ 0b001111001110111101,
+ 0b001111011110011101,
+ 0b001111011110111100,
+ 0b001111011110111101,
+ 0b001111111110111100,
+ 0b000000001000001100,
+ 0b001000000000111101,
+ 0b001000000010100101,
+ 0b001000010000100000,
+ 0b001001010010100100,
+ 0b001001110010000100,
+ 0b001010010100001001,
+ 0b001101111110111101,
+ 0b001111111110111101,
+ 0b001011110110101100,
+ 0b001010010100101000,
+ 0b001010110100101000
+};
+
+static const uint32_t gen7_subreg_table[32] = {
+ 0b000000000000000,
+ 0b000000000000001,
+ 0b000000000001000,
+ 0b000000000001111,
+ 0b000000000010000,
+ 0b000000010000000,
+ 0b000000100000000,
+ 0b000000110000000,
+ 0b000001000000000,
+ 0b000001000010000,
+ 0b000010100000000,
+ 0b001000000000000,
+ 0b001000000000001,
+ 0b001000010000001,
+ 0b001000010000010,
+ 0b001000010000011,
+ 0b001000010000100,
+ 0b001000010000111,
+ 0b001000010001000,
+ 0b001000010001110,
+ 0b001000010001111,
+ 0b001000110000000,
+ 0b001000111101000,
+ 0b010000000000000,
+ 0b010000110000000,
+ 0b011000000000000,
+ 0b011110010000111,
+ 0b100000000000000,
+ 0b101000000000000,
+ 0b110000000000000,
+ 0b111000000000000,
+ 0b111000000011100
+};
+
+static const uint32_t gen7_src_index_table[32] = {
+ 0b000000000000,
+ 0b000000000010,
+ 0b000000010000,
+ 0b000000010010,
+ 0b000000011000,
+ 0b000000100000,
+ 0b000000101000,
+ 0b000001001000,
+ 0b000001010000,
+ 0b000001110000,
+ 0b000001111000,
+ 0b001100000000,
+ 0b001100000010,
+ 0b001100001000,
+ 0b001100010000,
+ 0b001100010010,
+ 0b001100100000,
+ 0b001100101000,
+ 0b001100111000,
+ 0b001101000000,
+ 0b001101000010,
+ 0b001101001000,
+ 0b001101010000,
+ 0b001101100000,
+ 0b001101101000,
+ 0b001101110000,
+ 0b001101110001,
+ 0b001101111000,
+ 0b010001101000,
+ 0b010001101001,
+ 0b010001101010,
+ 0b010110001000
+};
+
+static const uint32_t *control_index_table;
+static const uint32_t *datatype_table;
+static const uint32_t *subreg_table;
+static const uint32_t *src_index_table;
+
static bool
set_control_index(struct brw_compact_instruction *dst,
struct brw_instruction *src)
@@ -197,8 +342,8 @@ set_control_index(struct brw_compact_instruction *dst,
uncompressed |= src->header.execution_size << 13;
uncompressed |= src->header.saturate << 16;
- for (int i = 0; i < ARRAY_SIZE(gen6_control_index_table); i++) {
- if (gen6_control_index_table[i] == uncompressed) {
+ for (int i = 0; i < 32; i++) {
+ if (control_index_table[i] == uncompressed) {
dst->dw0.control_index = i;
return true;
}
@@ -216,8 +361,8 @@ set_datatype_index(struct brw_compact_instruction *dst,
uncompressed |= src->bits1.ud & 0x7fff;
uncompressed |= (src->bits1.ud >> 29) << 15;
- for (int i = 0; i < ARRAY_SIZE(gen6_datatype_table); i++) {
- if (gen6_datatype_table[i] == uncompressed) {
+ for (int i = 0; i < 32; i++) {
+ if (datatype_table[i] == uncompressed) {
dst->dw0.data_type_index = i;
return true;
}
@@ -236,8 +381,8 @@ set_subreg_index(struct brw_compact_instruction *dst,
uncompressed |= src->bits2.da1.src0_subreg_nr << 5;
uncompressed |= src->bits3.da1.src1_subreg_nr << 10;
- for (int i = 0; i < ARRAY_SIZE(gen6_subreg_table); i++) {
- if (gen6_subreg_table[i] == uncompressed) {
+ for (int i = 0; i < 32; i++) {
+ if (subreg_table[i] == uncompressed) {
dst->dw0.sub_reg_index = i;
return true;
}
@@ -250,8 +395,8 @@ static bool
get_src_index(uint32_t uncompressed,
uint32_t *compressed)
{
- for (int i = 0; i < ARRAY_SIZE(gen6_src_index_table); i++) {
- if (gen6_src_index_table[i] == uncompressed) {
+ for (int i = 0; i < 32; i++) {
+ if (src_index_table[i] == uncompressed) {
*compressed = i;
return true;
}
@@ -373,7 +518,7 @@ static void
set_uncompressed_control(struct brw_instruction *dst,
struct brw_compact_instruction *src)
{
- uint32_t compressed = gen6_control_index_table[src->dw0.control_index];
+ uint32_t compressed = control_index_table[src->dw0.control_index];
dst->header.access_mode = compressed >> 0;
dst->header.mask_control = compressed >> 1;
@@ -391,7 +536,7 @@ static void
set_uncompressed_datatype(struct brw_instruction *dst,
struct brw_compact_instruction *src)
{
- uint32_t uncompressed = gen6_datatype_table[src->dw0.data_type_index];
+ uint32_t uncompressed = datatype_table[src->dw0.data_type_index];
dst->bits1.ud &= ~(0x7 << 29);
dst->bits1.ud |= ((uncompressed >> 15) & 0x7) << 29;
@@ -403,7 +548,7 @@ static void
set_uncompressed_subreg(struct brw_instruction *dst,
struct brw_compact_instruction *src)
{
- uint32_t uncompressed = gen6_subreg_table[src->dw0.sub_reg_index];
+ uint32_t uncompressed = subreg_table[src->dw0.sub_reg_index];
dst->bits1.da1.dest_subreg_nr = (uncompressed >> 0) & 0x1f;
dst->bits2.da1.src0_subreg_nr = (uncompressed >> 5) & 0x1f;
@@ -415,7 +560,7 @@ set_uncompressed_src0(struct brw_instruction *dst,
struct brw_compact_instruction *src)
{
uint32_t compressed = src->dw0.src0_index | src->dw1.src0_index << 2;
- uint32_t uncompressed = gen6_src_index_table[compressed];
+ uint32_t uncompressed = src_index_table[compressed];
dst->bits2.da1.src0_abs = uncompressed >> 0;
dst->bits2.da1.src0_negate = uncompressed >> 1;
@@ -429,7 +574,7 @@ static void
set_uncompressed_src1(struct brw_instruction *dst,
struct brw_compact_instruction *src)
{
- uint32_t uncompressed = gen6_src_index_table[src->dw1.src1_index];
+ uint32_t uncompressed = src_index_table[src->dw1.src1_index];
dst->bits3.da1.src1_abs = uncompressed >> 0;
dst->bits3.da1.src1_negate = uncompressed >> 1;
@@ -515,6 +660,36 @@ update_uip_jip(struct brw_instruction *insn, int this_old_ip,
}
void
+brw_init_compaction_tables(struct intel_context *intel)
+{
+ assert(gen6_control_index_table[ARRAY_SIZE(gen6_control_index_table) - 1] != 0);
+ assert(gen6_datatype_table[ARRAY_SIZE(gen6_datatype_table) - 1] != 0);
+ assert(gen6_subreg_table[ARRAY_SIZE(gen6_subreg_table) - 1] != 0);
+ assert(gen6_src_index_table[ARRAY_SIZE(gen6_src_index_table) - 1] != 0);
+ assert(gen7_control_index_table[ARRAY_SIZE(gen6_control_index_table) - 1] != 0);
+ assert(gen7_datatype_table[ARRAY_SIZE(gen6_datatype_table) - 1] != 0);
+ assert(gen7_subreg_table[ARRAY_SIZE(gen6_subreg_table) - 1] != 0);
+ assert(gen7_src_index_table[ARRAY_SIZE(gen6_src_index_table) - 1] != 0);
+
+ switch (intel->gen) {
+ case 7:
+ control_index_table = gen7_control_index_table;
+ datatype_table = gen7_datatype_table;
+ subreg_table = gen7_subreg_table;
+ src_index_table = gen7_src_index_table;
+ break;
+ case 6:
+ control_index_table = gen6_control_index_table;
+ datatype_table = gen6_datatype_table;
+ subreg_table = gen6_subreg_table;
+ src_index_table = gen6_src_index_table;
+ break;
+ default:
+ return;
+ }
+}
+
+void
brw_compact_instructions(struct brw_compile *p)
{
struct brw_context *brw = p->brw;
@@ -524,12 +699,7 @@ brw_compact_instructions(struct brw_compile *p)
int compressed_counts[p->next_insn_offset / 8];
int old_ip[p->next_insn_offset / 8];
- assert(gen6_control_index_table[ARRAY_SIZE(gen6_control_index_table) - 1] != 0);
- assert(gen6_datatype_table[ARRAY_SIZE(gen6_datatype_table) - 1] != 0);
- assert(gen6_subreg_table[ARRAY_SIZE(gen6_subreg_table) - 1] != 0);
- assert(gen6_src_index_table[ARRAY_SIZE(gen6_src_index_table) - 1] != 0);
-
- if (intel->gen != 6)
+ if (intel->gen < 6)
return;
int src_offset;
--
1.7.10.4
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