diff options
Diffstat (limited to 'src/mesa/drivers/dri/i915/i915_fragprog.c')
| -rw-r--r-- | src/mesa/drivers/dri/i915/i915_fragprog.c | 51 |
1 files changed, 49 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/i915/i915_fragprog.c b/src/mesa/drivers/dri/i915/i915_fragprog.c index 4c3f2236e5..bafc8f02b8 100644 --- a/src/mesa/drivers/dri/i915/i915_fragprog.c +++ b/src/mesa/drivers/dri/i915/i915_fragprog.c @@ -231,7 +231,7 @@ do { \ GLuint coord = src_vector( p, &inst->SrcReg[0], program); \ /* Texel lookup */ \ \ - i915_emit_texld( p, \ + i915_emit_texld( p, get_live_regs(p, inst), \ get_result_vector( p, inst ), \ get_result_flags( inst ), \ sampler, \ @@ -254,6 +254,43 @@ do { \ #define EMIT_2ARG_ARITH( OP ) EMIT_ARITH( OP, 2 ) #define EMIT_3ARG_ARITH( OP ) EMIT_ARITH( OP, 3 ) +/* + * TODO: consider moving this into core + */ +static void calc_live_regs( struct i915_fragment_program *p ) +{ + const struct gl_fragment_program *program = p->ctx->FragmentProgram._Current; + GLuint regsUsed = 0xffff0000; + GLint i; + + for (i = program->Base.NumInstructions - 1; i >= 0; i--) { + struct prog_instruction *inst = &program->Base.Instructions[i]; + int opArgs = _mesa_num_inst_src_regs(inst->Opcode); + int a; + + /* Register is written to: unmark as live for this and preceeding ops */ + if (inst->DstReg.File == PROGRAM_TEMPORARY) + regsUsed &= ~(1 << inst->DstReg.Index); + + for (a = 0; a < opArgs; a++) { + /* Register is read from: mark as live for this and preceeding ops */ + if (inst->SrcReg[a].File == PROGRAM_TEMPORARY) + regsUsed |= 1 << inst->SrcReg[a].Index; + } + + p->usedRegs[i] = regsUsed; + } +} + +static GLuint get_live_regs( struct i915_fragment_program *p, + const struct prog_instruction *inst ) +{ + const struct gl_fragment_program *program = p->ctx->FragmentProgram._Current; + GLuint nr = inst - program->Base.Instructions; + + return p->usedRegs[nr]; +} + /* Possible concerns: * @@ -289,6 +326,15 @@ upload_program(struct i915_fragment_program *p) return; } + if (program->Base.NumInstructions > I915_MAX_INSN) { + i915_program_error( p, "Exceeded max instructions" ); + return; + } + + /* Not always needed: + */ + calc_live_regs(p); + while (1) { GLuint src0, src1, src2, flags; GLuint tmp = 0; @@ -423,7 +469,8 @@ upload_program(struct i915_fragment_program *p) src0 = src_vector(p, &inst->SrcReg[0], program); tmp = i915_get_utemp(p); - i915_emit_texld(p, tmp, A0_DEST_CHANNEL_ALL, /* use a dummy dest reg */ + i915_emit_texld(p, get_live_regs(p, inst), + tmp, A0_DEST_CHANNEL_ALL, /* use a dummy dest reg */ 0, src0, T0_TEXKILL); break; |