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r600g: support up to 64 shader constants

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From the r600 ISA:
Each ALU clause can lock up to four sets of constants
into the constant cache.  Each set (one cache line) is
16 128-bit constants. These are split into two groups.
Each group can be from a different constant buffer
(out of 16 buffers). Each group of two constants consists
of either [Line] and [Line+1] or [line + loop_ctr]
and [line + loop_ctr +1].

For supporting more than 64 constants, we need to
break the code into multiple ALU clauses based
on what sets of constants are needed in that clause.

Note: This is a candidate for the 7.10 branch.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
This commit is contained in:
Alex Deucher 2011-01-04 15:37:12 -05:00
parent e96e86d07b
commit f28bb6bdd1
2 changed files with 20 additions and 1 deletions
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17
src/gallium/drivers/r600/r600_asm.c
View file

@ -470,7 +470,22 @@ int r600_bc_add_alu_type(struct r600_bc *bc, const struct r600_bc_alu *alu, int
bc->cf_last->ndw += 2;
bc->ndw += 2;
bc->cf_last->kcache0_mode = 2;
/* The following configuration provides 64 128-bit constants.
* Each cacheline holds 16 128-bit constants and each
* kcache can lock 2 cachelines and there are 2 kcaches per
* ALU clause for a max of 64 constants.
* For supporting more than 64 constants, the code needs
* to be broken down into multiple ALU clauses.
*/
/* select the constant buffer (0-15) for each kcache */
bc->cf_last->kcache0_bank = 0;
bc->cf_last->kcache1_bank = 0;
/* lock 2 cachelines per kcache; 4 total */
bc->cf_last->kcache0_mode = V_SQ_CF_KCACHE_LOCK_2;
bc->cf_last->kcache1_mode = V_SQ_CF_KCACHE_LOCK_2;
/* set the cacheline offsets for each kcache */
bc->cf_last->kcache0_addr = 0;
bc->cf_last->kcache1_addr = 2;
/* process cur ALU instructions for bank swizzle */
if (alu->last) {

4
src/gallium/drivers/r600/r600_sq.h
View file

@ -74,6 +74,10 @@
#define S_SQ_CF_ALU_WORD0_KCACHE_MODE0(x) (((x) & 0x3) << 30)
#define G_SQ_CF_ALU_WORD0_KCACHE_MODE0(x) (((x) >> 30) & 0x3)
#define C_SQ_CF_ALU_WORD0_KCACHE_MODE0 0x3FFFFFFF
#define V_SQ_CF_KCACHE_NOP 0x00000000
#define V_SQ_CF_KCACHE_LOCK_1 0x00000001
#define V_SQ_CF_KCACHE_LOCK_2 0x00000002
#define V_SQ_CF_KCACHE_LOCK_LOOP_INDEX 0x00000003
#define P_SQ_CF_ALU_WORD1
#define S_SQ_CF_ALU_WORD1_KCACHE_MODE1(x) (((x) & 0x3) << 0)
#define G_SQ_CF_ALU_WORD1_KCACHE_MODE1(x) (((x) >> 0) & 0x3)