KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

freedreno/a3xx/compiler: ensure min # of cycles after bary instr 

The results of a bary.f do not appear to be immediatley available, but
there is no explicit sync bit.  Instead the compiler must just ensure
that there are a minimum number of instructions following the bary
before use of the result of the bary.  We aren't clever enough for that
so just throw in some nop's.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
This commit is contained in:
Rob Clark 2013-06-21 15:05:12 -04:00
parent d4aaa4439a
commit efdc6caaf5
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/gallium/drivers/freedreno/a3xx/fd3_compiler.c
View File

@ -1072,12 +1072,13 @@ static const struct instr_translater translaters[TGSI_OPCODE_LAST] = {
INSTR(END, instr_cat0, .opc = OPC_END),
};
static void
static int
decl_in(struct fd3_compile_context *ctx, struct tgsi_full_declaration *decl)
{
struct fd3_shader_stateobj *so = ctx->so;
unsigned base = ctx->base_reg[TGSI_FILE_INPUT];
unsigned i, flags = 0;
int nop = 0;
if (ctx->so->half_precision)
flags |= IR3_REG_HALF;
@ -1115,8 +1116,12 @@ decl_in(struct fd3_compile_context *ctx, struct tgsi_full_declaration *decl)
/* input base (always r0.x): */
ir3_reg_create(instr, regid(0,0), 0);
nop = 6;
}
}
return nop;
}
static void
@ -1174,6 +1179,7 @@ static void
compile_instructions(struct fd3_compile_context *ctx)
{
struct ir3_shader *ir = ctx->ir;
int nop = 0;
while (!tgsi_parse_end_of_tokens(&ctx->parser)) {
tgsi_parse_token(&ctx->parser);
@ -1185,7 +1191,7 @@ compile_instructions(struct fd3_compile_context *ctx)
if (decl->Declaration.File == TGSI_FILE_OUTPUT) {
decl_out(ctx, decl);
} else if (decl->Declaration.File == TGSI_FILE_INPUT) {
decl_in(ctx, decl);
nop = decl_in(ctx, decl);
} else if (decl->Declaration.File == TGSI_FILE_SAMPLER) {
decl_samp(ctx, decl);
}
@ -1208,6 +1214,11 @@ compile_instructions(struct fd3_compile_context *ctx)
unsigned opc = inst->Instruction.Opcode;
const struct instr_translater *t = &translaters[opc];
if (nop) {
ir3_instr_create(ctx->ir, 0, OPC_NOP)->repeat = nop - 1;
nop = 0;
}
if (t->fxn) {
t->fxn(t, ctx, inst);
ctx->num_internal_temps = 0;