diff options
Diffstat (limited to 'src/mesa/pipe/i965simple/brw_wm_decl.c')
-rw-r--r-- | src/mesa/pipe/i965simple/brw_wm_decl.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/src/mesa/pipe/i965simple/brw_wm_decl.c b/src/mesa/pipe/i965simple/brw_wm_decl.c new file mode 100644 index 0000000000..392f17fad6 --- /dev/null +++ b/src/mesa/pipe/i965simple/brw_wm_decl.c @@ -0,0 +1,377 @@ + +#include "brw_context.h" +#include "brw_eu.h" +#include "brw_wm.h" +#include "pipe/p_util.h" +#include "pipe/p_shader_tokens.h" +#include "pipe/tgsi/util/tgsi_parse.h" + +static struct brw_reg alloc_tmp(struct brw_wm_compile *c) +{ + c->tmp_index++; + c->reg_index = MAX2(c->reg_index, c->tmp_index); + return brw_vec8_grf(c->tmp_start + c->tmp_index, 0); +} + +static void release_tmps(struct brw_wm_compile *c) +{ + c->tmp_index = 0; +} + + + +static int is_null( struct brw_reg reg ) +{ + return (reg.file == BRW_ARCHITECTURE_REGISTER_FILE && + reg.nr == BRW_ARF_NULL); +} + +static void emit_pixel_xy( struct brw_wm_compile *c ) +{ + if (is_null(c->pixel_xy[0])) { + + struct brw_compile *p = &c->func; + struct brw_reg r1_uw = retype(brw_vec1_grf(1, 0), BRW_REGISTER_TYPE_UW); + + c->pixel_xy[0] = vec8(retype(alloc_tmp(c), BRW_REGISTER_TYPE_UW)); + c->pixel_xy[1] = vec8(retype(alloc_tmp(c), BRW_REGISTER_TYPE_UW)); + + /* Calculate pixel centers by adding 1 or 0 to each of the + * micro-tile coordinates passed in r1. + */ + brw_ADD(p, + c->pixel_xy[0], + stride(suboffset(r1_uw, 4), 2, 4, 0), + brw_imm_v(0x10101010)); + + brw_ADD(p, + c->pixel_xy[1], + stride(suboffset(r1_uw, 5), 2, 4, 0), + brw_imm_v(0x11001100)); + } +} + + + + + + +static void emit_delta_xy( struct brw_wm_compile *c ) +{ + if (is_null(c->delta_xy[0])) { + struct brw_compile *p = &c->func; + struct brw_reg r1 = brw_vec1_grf(1, 0); + + emit_pixel_xy(c); + + c->delta_xy[0] = alloc_tmp(c); + c->delta_xy[1] = alloc_tmp(c); + + /* Calc delta X,Y by subtracting origin in r1 from the pixel + * centers. + */ + brw_ADD(p, + c->delta_xy[0], + retype(c->pixel_xy[0], BRW_REGISTER_TYPE_UW), + negate(r1)); + + brw_ADD(p, + c->delta_xy[1], + retype(c->pixel_xy[1], BRW_REGISTER_TYPE_UW), + negate(suboffset(r1,1))); + } +} + + + +#if 0 +static void emit_pixel_w( struct brw_wm_compile *c ) +{ + if (is_null(c->pixel_w)) { + struct brw_compile *p = &c->func; + + struct brw_reg interp_wpos = c->coef_wpos; + + c->pixel_w = alloc_tmp(c); + + emit_delta_xy(c); + + /* Calc 1/w - just linterp wpos[3] optimized by putting the + * result straight into a message reg. + */ + struct brw_reg interp3 = brw_vec1_grf(interp_wpos.nr+1, 4); + brw_LINE(p, brw_null_reg(), interp3, c->delta_xy[0]); + brw_MAC(p, brw_message_reg(2), suboffset(interp3, 1), c->delta_xy[1]); + + /* Calc w */ + brw_math_16( p, + c->pixel_w, + BRW_MATH_FUNCTION_INV, + BRW_MATH_SATURATE_NONE, + 2, + brw_null_reg(), + BRW_MATH_PRECISION_FULL); + } +} +#endif + + +static void emit_cinterp(struct brw_wm_compile *c, + int idx, + int mask ) +{ + struct brw_compile *p = &c->func; + struct brw_reg interp[4]; + struct brw_reg coef = c->payload_coef[idx]; + int i; + + interp[0] = brw_vec1_grf(coef.nr, 0); + interp[1] = brw_vec1_grf(coef.nr, 4); + interp[2] = brw_vec1_grf(coef.nr+1, 0); + interp[3] = brw_vec1_grf(coef.nr+1, 4); + + for(i = 0; i < 4; i++ ) { + if (mask & (1<<i)) { + struct brw_reg dst = c->wm_regs[TGSI_FILE_INPUT][idx][i]; + brw_MOV(p, dst, suboffset(interp[i],3)); + } + } +} + +static void emit_linterp(struct brw_wm_compile *c, + int idx, + int mask ) +{ + struct brw_compile *p = &c->func; + struct brw_reg interp[4]; + struct brw_reg coef = c->payload_coef[idx]; + int i; + + emit_delta_xy(c); + + interp[0] = brw_vec1_grf(coef.nr, 0); + interp[1] = brw_vec1_grf(coef.nr, 4); + interp[2] = brw_vec1_grf(coef.nr+1, 0); + interp[3] = brw_vec1_grf(coef.nr+1, 4); + + for(i = 0; i < 4; i++ ) { + if (mask & (1<<i)) { + struct brw_reg dst = c->wm_regs[TGSI_FILE_INPUT][idx][i]; + brw_LINE(p, brw_null_reg(), interp[i], c->delta_xy[0]); + brw_MAC(p, dst, suboffset(interp[i],1), c->delta_xy[1]); + } + } +} + +#if 0 +static void emit_pinterp(struct brw_wm_compile *c, + int idx, + int mask ) +{ + struct brw_compile *p = &c->func; + struct brw_reg interp[4]; + struct brw_reg coef = c->payload_coef[idx]; + int i; + + get_delta_xy(c); + get_pixel_w(c); + + interp[0] = brw_vec1_grf(coef.nr, 0); + interp[1] = brw_vec1_grf(coef.nr, 4); + interp[2] = brw_vec1_grf(coef.nr+1, 0); + interp[3] = brw_vec1_grf(coef.nr+1, 4); + + for(i = 0; i < 4; i++ ) { + if (mask & (1<<i)) { + struct brw_reg dst = allocate_reg(c, TGSI_FILE_INPUT, idx, i); + brw_LINE(p, brw_null_reg(), interp[i], c->delta_xy[0]); + brw_MAC(p, dst, suboffset(interp[i],1), c->delta_xy[1]); + brw_MUL(p, dst, dst, c->pixel_w); + } + } +} +#endif + + + +#if 0 +static void emit_wpos( ) +{ + struct prog_dst_register dst = dst_reg(PROGRAM_INPUT, idx); + struct tgsi_full_src_register interp = src_reg(PROGRAM_PAYLOAD, idx); + struct tgsi_full_src_register deltas = get_delta_xy(c); + struct tgsi_full_src_register arg2; + unsigned opcode; + + opcode = WM_LINTERP; + arg2 = src_undef(); + + /* Have to treat wpos.xy specially: + */ + emit_op(c, + WM_WPOSXY, + dst_mask(dst, WRITEMASK_XY), + 0, 0, 0, + get_pixel_xy(c), + src_undef(), + src_undef()); + + dst = dst_mask(dst, WRITEMASK_ZW); + + /* PROGRAM_INPUT.attr.xyzw = INTERP payload.interp[attr].x, deltas.xyw + */ + emit_op(c, + WM_LINTERP, + dst, + 0, 0, 0, + interp, + deltas, + arg2); +} +#endif + + + + +/* Perform register allocation: + * + * -- r0??? + * -- passthrough depth regs (and stencil/aa??) + * -- curbe ?? + * -- inputs (coefficients) + * + * Use a totally static register allocation. This will perform poorly + * but is an easy way to get started (again). + */ +static void prealloc_reg(struct brw_wm_compile *c) +{ + int i, j; + int nr_curbe_regs = 0; + + /* R0, then some depth related regs: + */ + for (i = 0; i < c->key.nr_depth_regs; i++) { + c->payload_depth[i] = brw_vec8_grf(i*2, 0); + c->reg_index += 2; + } + + + /* Then a copy of our part of the CURBE entry: + */ + { + int nr_constants = c->fp->info.nr_regs[TGSI_FILE_CONSTANT]; + int index = 0; + + c->prog_data.max_const = 4*nr_constants; + for (i = 0; i < nr_constants; i++) { + for (j = 0; j < 4; j++, index++) + c->wm_regs[TGSI_FILE_CONSTANT][i][j] = brw_vec1_grf(c->reg_index + index/8, + index%8); + } + + nr_curbe_regs = 2*((4*nr_constants+15)/16); + c->reg_index += nr_curbe_regs; + } + + /* Next we receive the plane coefficients for parameter + * interpolation: + */ + for (i = 0; i < c->fp->info.nr_regs[TGSI_FILE_INPUT]; i++) { + c->payload_coef[i] = brw_vec8_grf(c->reg_index, 0); + c->reg_index += 2; + } + + c->prog_data.first_curbe_grf = c->key.nr_depth_regs * 2; + c->prog_data.urb_read_length = c->fp->program.num_inputs * 2; + c->prog_data.curb_read_length = nr_curbe_regs; + + /* That's the end of the payload, now we can start allocating registers. + */ + c->emit_mask_reg = brw_uw1_reg(BRW_GENERAL_REGISTER_FILE, c->reg_index, 0); + c->reg_index++; + + c->stack = brw_uw16_reg(BRW_GENERAL_REGISTER_FILE, c->reg_index, 0); + c->reg_index += 2; + + /* Now allocate room for the interpolated inputs and staging + * registers for the outputs: + */ + for (i = 0; i < c->fp->info.nr_regs[TGSI_FILE_INPUT]; i++) + for (j = 0; j < 4; j++) + c->wm_regs[TGSI_FILE_INPUT][i][j] = brw_vec8_grf( c->reg_index++, 0 ); + + for (i = 0; i < c->fp->info.nr_regs[TGSI_FILE_OUTPUT]; i++) + for (j = 0; j < 4; j++) + c->wm_regs[TGSI_FILE_OUTPUT][i][j] = brw_vec8_grf( c->reg_index++, 0 ); + + /* Beyond this we should only need registers for internal temporaries: + */ + c->tmp_start = c->reg_index; +} + + + + + +/* Need to interpolate fragment program inputs in as a preamble to the + * shader. A more sophisticated compiler would do this on demand, but + * we'll do it up front: + */ +void brw_wm_emit_decls(struct brw_wm_compile *c) +{ + struct tgsi_parse_context parse; + int done = 0; + + prealloc_reg(c); + + tgsi_parse_init( &parse, c->fp->program.tokens ); + + while( !done && + !tgsi_parse_end_of_tokens( &parse ) ) + { + tgsi_parse_token( &parse ); + + switch( parse.FullToken.Token.Type ) { + case TGSI_TOKEN_TYPE_DECLARATION: + { + const struct tgsi_full_declaration *decl = &parse.FullToken.FullDeclaration; + unsigned first = decl->u.DeclarationRange.First; + unsigned last = decl->u.DeclarationRange.Last; + unsigned mask = decl->Declaration.UsageMask; /* ? */ + unsigned i; + + if (decl->Declaration.File != TGSI_FILE_INPUT) + break; + + assert(decl->Declaration.Interpolate); + + for( i = first; i <= last; i++ ) { + switch (decl->Interpolation.Interpolate) { + case TGSI_INTERPOLATE_CONSTANT: + emit_cinterp(c, i, mask); + break; + + case TGSI_INTERPOLATE_LINEAR: + emit_linterp(c, i, mask); + break; + + case TGSI_INTERPOLATE_PERSPECTIVE: + //emit_pinterp(c, i, mask); + emit_linterp(c, i, mask); + break; + } + } + break; + } + case TGSI_TOKEN_TYPE_IMMEDIATE: + case TGSI_TOKEN_TYPE_INSTRUCTION: + default: + done = 1; + break; + } + } + + tgsi_parse_free (&parse); + + release_tmps(c); +} |