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nvc0: recognize r63 as zero in constant folding

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This commit is contained in:
Christoph Bumiller 2011-01-21 17:04:25 +01:00
parent bf1df06773
commit 419ff10b0e
3 changed files with 9 additions and 13 deletions
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10
src/gallium/drivers/nvc0/nvc0_pc.c
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@ -103,6 +103,12 @@ nvc0_pc_replace_value(struct nv_pc *pc,
return n;
}
static INLINE boolean
is_gpr63(struct nv_value *val)
{
return (val->reg.file == NV_FILE_GPR && val->reg.id == 63);
}
struct nv_value *
nvc0_pc_find_constant(struct nv_ref *ref)
{
@ -116,7 +122,7 @@ nvc0_pc_find_constant(struct nv_ref *ref)
assert(!src->insn->src[0]->mod);
src = src->insn->src[0]->value;
}
if ((src->reg.file == NV_FILE_IMM) ||
if ((src->reg.file == NV_FILE_IMM) || is_gpr63(src) ||
(src->insn &&
src->insn->opcode == NV_OP_LD &&
src->insn->src[0]->value->reg.file >= NV_FILE_MEM_C(0) &&
@ -130,7 +136,7 @@ nvc0_pc_find_immediate(struct nv_ref *ref)
{
struct nv_value *src = nvc0_pc_find_constant(ref);
return (src && src->reg.file == NV_FILE_IMM) ? src : NULL;
return (src && (src->reg.file == NV_FILE_IMM || is_gpr63(src))) ? src : NULL;
}
static void

2
src/gallium/drivers/nvc0/nvc0_pc.h
View file

@ -310,7 +310,7 @@ struct nv_reg {
int32_t s32;
int64_t s64;
uint64_t u64;
uint32_t u32;
uint32_t u32; /* expected to be 0 for $r63 */
float f32;
double f64;
} imm;

10
src/gallium/drivers/nvc0/nvc0_tgsi_to_nc.c
View file

@ -1388,16 +1388,6 @@ emit_tex(struct bld_context *bld, uint opcode, int tic, int tsc,
return nvi;
}
/*
static boolean
bld_is_constant(struct nv_value *val)
{
if (val->reg.file == NV_FILE_IMM)
return TRUE;
return val->insn && nvCG_find_constant(val->insn->src[0]);
}
*/
static void
bld_tex(struct bld_context *bld, struct nv_value *dst0[4],
const struct tgsi_full_instruction *insn)