diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_eu.h | 6 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_glsl.c | 339 |
2 files changed, 335 insertions, 10 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_eu.h b/src/mesa/drivers/dri/i965/brw_eu.h index 8cbe4215fb..49b422ee2f 100644 --- a/src/mesa/drivers/dri/i965/brw_eu.h +++ b/src/mesa/drivers/dri/i965/brw_eu.h @@ -432,6 +432,12 @@ static INLINE struct brw_reg brw_uw8_grf( GLuint nr, return brw_uw8_reg(BRW_GENERAL_REGISTER_FILE, nr, subnr); } +static INLINE struct brw_reg brw_uw16_grf( GLuint nr, + GLuint subnr ) +{ + return brw_uw16_reg(BRW_GENERAL_REGISTER_FILE, nr, subnr); +} + static INLINE struct brw_reg brw_null_reg( void ) { return brw_vec8_reg(BRW_ARCHITECTURE_REGISTER_FILE, diff --git a/src/mesa/drivers/dri/i965/brw_wm_glsl.c b/src/mesa/drivers/dri/i965/brw_wm_glsl.c index d2746564c5..507204970a 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_glsl.c +++ b/src/mesa/drivers/dri/i965/brw_wm_glsl.c @@ -1052,13 +1052,24 @@ static __inline struct brw_reg low_words( struct brw_reg reg ) return stride( retype( reg, BRW_REGISTER_TYPE_W ), 0, 8, 2 ); } -/* One- and two-dimensional Perlin noise, similar to the description in - _Improving Noise_, Ken Perlin, Computer Graphics vol. 35 no. 3. */ +static __inline struct brw_reg even_bytes( struct brw_reg reg ) +{ + return stride( retype( reg, BRW_REGISTER_TYPE_B ), 0, 16, 2 ); +} + +static __inline struct brw_reg odd_bytes( struct brw_reg reg ) +{ + return stride( suboffset( retype( reg, BRW_REGISTER_TYPE_B ), 1 ), + 0, 16, 2 ); +} + +/* One-, two- and three-dimensional Perlin noise, similar to the description + in _Improving Noise_, Ken Perlin, Computer Graphics vol. 35 no. 3. */ static void noise1_sub( struct brw_wm_compile *c ) { struct brw_compile *p = &c->func; struct brw_reg param, - x0, x1, /* gradients at each end */ + x0, x1, /* gradients at each end */ t, tmp[ 2 ], /* float temporaries */ itmp[ 5 ]; /* unsigned integer temporaries (aliases of floats above) */ int i; @@ -1232,18 +1243,18 @@ static void noise2_sub( struct brw_wm_compile *c ) { for( i = 0; i < 4; i++ ) brw_MUL( p, itmp[ i ], itmp[ 4 ], itmp[ i ] ); for( i = 0; i < 4; i++ ) - brw_XOR( p, low_words( itmp[ i ] ), low_words( itmp[ i ] ), - high_words( itmp[ i ] ) ); + brw_XOR( p, low_words( itmp[ i ] ), low_words( itmp[ i ] ), + high_words( itmp[ i ] ) ); for( i = 0; i < 4; i++ ) brw_MUL( p, itmp[ i ], itmp[ 5 ], itmp[ i ] ); for( i = 0; i < 4; i++ ) - brw_XOR( p, low_words( itmp[ i ] ), low_words( itmp[ i ] ), - high_words( itmp[ i ] ) ); + brw_XOR( p, low_words( itmp[ i ] ), low_words( itmp[ i ] ), + high_words( itmp[ i ] ) ); for( i = 0; i < 4; i++ ) brw_MUL( p, itmp[ i ], itmp[ 6 ], itmp[ i ] ); for( i = 0; i < 4; i++ ) - brw_XOR( p, low_words( itmp[ i ] ), low_words( itmp[ i ] ), - high_words( itmp[ i ] ) ); + brw_XOR( p, low_words( itmp[ i ] ), low_words( itmp[ i ] ), + high_words( itmp[ i ] ) ); /* Now we want to initialise the four gradients based on the hashes. Format conversion from signed integer to float leaves @@ -1350,6 +1361,312 @@ static void emit_noise2( struct brw_wm_compile *c, release_tmps( c, mark ); } + +/* The three-dimensional case is much like the one- and two- versions above, + but since the number of corners is rapidly growing we now pack 16 16-bit + hashes into each register to extract more parallelism from the EUs. */ +static void noise3_sub( struct brw_wm_compile *c ) { + + struct brw_compile *p = &c->func; + struct brw_reg param0, param1, param2, + x0y0, x0y1, x1y0, x1y1, /* gradients at four of the corners */ + xi, yi, zi, /* interpolation coefficients */ + t, tmp[ 8 ], /* float temporaries */ + itmp[ 8 ], /* unsigned integer temporaries (aliases of floats above) */ + wtmp[ 8 ]; /* 16-way unsigned word temporaries (aliases of above) */ + int i; + int mark = mark_tmps( c ); + + x0y0 = alloc_tmp( c ); + x0y1 = alloc_tmp( c ); + x1y0 = alloc_tmp( c ); + x1y1 = alloc_tmp( c ); + xi = alloc_tmp( c ); + yi = alloc_tmp( c ); + zi = alloc_tmp( c ); + t = alloc_tmp( c ); + for( i = 0; i < 8; i++ ) { + tmp[ i ] = alloc_tmp( c ); + itmp[ i ] = retype( tmp[ i ], BRW_REGISTER_TYPE_UD ); + wtmp[ i ] = brw_uw16_grf( tmp[ i ].nr, 0 ); + } + + param0 = lookup_tmp( c, mark - 4 ); + param1 = lookup_tmp( c, mark - 3 ); + param2 = lookup_tmp( c, mark - 2 ); + + brw_set_access_mode( p, BRW_ALIGN_1 ); + + /* Arrange the eight corner coordinates into scalars (itmp0..itmp3) to + be hashed. Also compute the remainders (offsets within the unit + cube), interleaved to reduce register dependency penalties. */ + brw_RNDD( p, itmp[ 0 ], param0 ); + brw_RNDD( p, itmp[ 1 ], param1 ); + brw_RNDD( p, itmp[ 2 ], param2 ); + brw_MOV( p, itmp[ 4 ], brw_imm_ud( 0xBC8F ) ); /* constant used later */ + brw_MOV( p, itmp[ 5 ], brw_imm_ud( 0xD0BD ) ); /* constant used later */ + brw_MOV( p, itmp[ 6 ], brw_imm_ud( 0x9B93 ) ); /* constant used later */ + brw_FRC( p, param0, param0 ); + brw_FRC( p, param1, param1 ); + brw_FRC( p, param2, param2 ); + /* Since we now have only 16 bits of precision in the hash, we must + be more careful about thorough mixing to maintain entropy as we + squash the input vector into a small scalar. */ + brw_MUL( p, brw_acc_reg(), itmp[ 4 ], itmp[ 0 ] ); + brw_MAC( p, brw_acc_reg(), itmp[ 5 ], itmp[ 1 ] ); + brw_MAC( p, itmp[ 0 ], itmp[ 6 ], itmp[ 2 ] ); + brw_ADD( p, high_words( itmp[ 0 ] ), low_words( itmp[ 0 ] ), + brw_imm_uw( 0xBC8F ) ); + + /* Temporarily disable the execution mask while we work with ExecSize=16 + channels (the mask is set for ExecSize=8 and is probably incorrect). + Although this might cause execution of unwanted channels, the code + writes only to temporary registers and has no side effects, so + disabling the mask is harmless. */ + brw_push_insn_state( p ); + brw_set_mask_control( p, BRW_MASK_DISABLE ); + brw_ADD( p, wtmp[ 1 ], wtmp[ 0 ], brw_imm_uw( 0xD0BD ) ); + brw_ADD( p, wtmp[ 2 ], wtmp[ 0 ], brw_imm_uw( 0x9B93 ) ); + brw_ADD( p, wtmp[ 3 ], wtmp[ 1 ], brw_imm_uw( 0x9B93 ) ); + + /* We're now ready to perform the hashing. The eight hashes are + interleaved for performance. The hash function used is + designed to rapidly achieve avalanche and require only 16x16 + bit multiplication, and 8-bit swizzles (which we get for + free). */ + for( i = 0; i < 4; i++ ) + brw_MUL( p, wtmp[ i ], wtmp[ i ], brw_imm_uw( 0x28D9 ) ); + for( i = 0; i < 4; i++ ) + brw_XOR( p, even_bytes( wtmp[ i ] ), even_bytes( wtmp[ i ] ), + odd_bytes( wtmp[ i ] ) ); + for( i = 0; i < 4; i++ ) + brw_MUL( p, wtmp[ i ], wtmp[ i ], brw_imm_uw( 0xC6D5 ) ); + for( i = 0; i < 4; i++ ) + brw_XOR( p, even_bytes( wtmp[ i ] ), even_bytes( wtmp[ i ] ), + odd_bytes( wtmp[ i ] ) ); + brw_pop_insn_state( p ); + + /* Now we want to initialise the four rear gradients based on the + hashes. Format conversion from signed integer to float leaves + everything scaled too high by a factor of pow( 2, 15 ), but + we correct for that right at the end. */ + /* x component */ + brw_ADD( p, t, param0, brw_imm_f( -1.0 ) ); + brw_MOV( p, x0y0, low_words( tmp[ 0 ] ) ); + brw_MOV( p, x0y1, low_words( tmp[ 1 ] ) ); + brw_MOV( p, x1y0, high_words( tmp[ 0 ] ) ); + brw_MOV( p, x1y1, high_words( tmp[ 1 ] ) ); + + brw_push_insn_state( p ); + brw_set_mask_control( p, BRW_MASK_DISABLE ); + brw_SHL( p, wtmp[ 0 ], wtmp[ 0 ], brw_imm_uw( 5 ) ); + brw_SHL( p, wtmp[ 1 ], wtmp[ 1 ], brw_imm_uw( 5 ) ); + brw_pop_insn_state( p ); + + brw_MUL( p, x1y0, x1y0, t ); + brw_MUL( p, x1y1, x1y1, t ); + brw_ADD( p, t, param1, brw_imm_f( -1.0 ) ); + brw_MUL( p, x0y0, x0y0, param0 ); + brw_MUL( p, x0y1, x0y1, param0 ); + + /* y component */ + brw_MOV( p, tmp[ 5 ], low_words( tmp[ 1 ] ) ); + brw_MOV( p, tmp[ 7 ], high_words( tmp[ 1 ] ) ); + brw_MOV( p, tmp[ 4 ], low_words( tmp[ 0 ] ) ); + brw_MOV( p, tmp[ 6 ], high_words( tmp[ 0 ] ) ); + + brw_push_insn_state( p ); + brw_set_mask_control( p, BRW_MASK_DISABLE ); + brw_SHL( p, wtmp[ 0 ], wtmp[ 0 ], brw_imm_uw( 5 ) ); + brw_SHL( p, wtmp[ 1 ], wtmp[ 1 ], brw_imm_uw( 5 ) ); + brw_pop_insn_state( p ); + + brw_MUL( p, tmp[ 5 ], tmp[ 5 ], t ); + brw_MUL( p, tmp[ 7 ], tmp[ 7 ], t ); + brw_ADD( p, t, param0, brw_imm_f( -1.0 ) ); + brw_MUL( p, tmp[ 4 ], tmp[ 4 ], param1 ); + brw_MUL( p, tmp[ 6 ], tmp[ 6 ], param1 ); + + brw_ADD( p, x0y1, x0y1, tmp[ 5 ] ); + brw_ADD( p, x1y1, x1y1, tmp[ 7 ] ); + brw_ADD( p, x0y0, x0y0, tmp[ 4 ] ); + brw_ADD( p, x1y0, x1y0, tmp[ 6 ] ); + + /* z component */ + brw_MOV( p, tmp[ 4 ], low_words( tmp[ 0 ] ) ); + brw_MOV( p, tmp[ 5 ], low_words( tmp[ 1 ] ) ); + brw_MOV( p, tmp[ 6 ], high_words( tmp[ 0 ] ) ); + brw_MOV( p, tmp[ 7 ], high_words( tmp[ 1 ] ) ); + + brw_MUL( p, tmp[ 4 ], tmp[ 4 ], param2 ); + brw_MUL( p, tmp[ 5 ], tmp[ 5 ], param2 ); + brw_MUL( p, tmp[ 6 ], tmp[ 6 ], param2 ); + brw_MUL( p, tmp[ 7 ], tmp[ 7 ], param2 ); + + brw_ADD( p, x0y0, x0y0, tmp[ 4 ] ); + brw_ADD( p, x0y1, x0y1, tmp[ 5 ] ); + brw_ADD( p, x1y0, x1y0, tmp[ 6 ] ); + brw_ADD( p, x1y1, x1y1, tmp[ 7 ] ); + + /* We interpolate between the gradients using the polynomial + 6t^5 - 15t^4 + 10t^3 (Perlin). */ + brw_MUL( p, xi, param0, brw_imm_f( 6.0 ) ); + brw_MUL( p, yi, param1, brw_imm_f( 6.0 ) ); + brw_MUL( p, zi, param2, brw_imm_f( 6.0 ) ); + brw_ADD( p, xi, xi, brw_imm_f( -15.0 ) ); + brw_ADD( p, yi, yi, brw_imm_f( -15.0 ) ); + brw_ADD( p, zi, zi, brw_imm_f( -15.0 ) ); + brw_MUL( p, xi, xi, param0 ); + brw_MUL( p, yi, yi, param1 ); + brw_MUL( p, zi, zi, param2 ); + brw_ADD( p, xi, xi, brw_imm_f( 10.0 ) ); + brw_ADD( p, yi, yi, brw_imm_f( 10.0 ) ); + brw_ADD( p, zi, zi, brw_imm_f( 10.0 ) ); + brw_ADD( p, x0y1, x0y1, negate( x0y0 ) ); /* unrelated work */ + brw_ADD( p, x1y1, x1y1, negate( x1y0 ) ); /* unrelated work */ + brw_MUL( p, xi, xi, param0 ); + brw_MUL( p, yi, yi, param1 ); + brw_MUL( p, zi, zi, param2 ); + brw_MUL( p, xi, xi, param0 ); + brw_MUL( p, yi, yi, param1 ); + brw_MUL( p, zi, zi, param2 ); + brw_MUL( p, xi, xi, param0 ); + brw_MUL( p, yi, yi, param1 ); + brw_MUL( p, zi, zi, param2 ); + + /* Here we interpolate in the y dimension... */ + brw_MUL( p, x0y1, x0y1, yi ); + brw_MUL( p, x1y1, x1y1, yi ); + brw_ADD( p, x0y0, x0y0, x0y1 ); + brw_ADD( p, x1y0, x1y0, x1y1 ); + + /* And now in x. Leave the result in tmp[ 0 ] (see below)... */ + brw_ADD( p, x1y0, x1y0, negate( x0y0 ) ); + brw_MUL( p, x1y0, x1y0, xi ); + brw_ADD( p, tmp[ 0 ], x0y0, x1y0 ); + + /* Now do the same thing for the front four gradients... */ + /* x component */ + brw_MOV( p, x0y0, low_words( tmp[ 2 ] ) ); + brw_MOV( p, x0y1, low_words( tmp[ 3 ] ) ); + brw_MOV( p, x1y0, high_words( tmp[ 2 ] ) ); + brw_MOV( p, x1y1, high_words( tmp[ 3 ] ) ); + + brw_push_insn_state( p ); + brw_set_mask_control( p, BRW_MASK_DISABLE ); + brw_SHL( p, wtmp[ 2 ], wtmp[ 2 ], brw_imm_uw( 5 ) ); + brw_SHL( p, wtmp[ 3 ], wtmp[ 3 ], brw_imm_uw( 5 ) ); + brw_pop_insn_state( p ); + + brw_MUL( p, x1y0, x1y0, t ); + brw_MUL( p, x1y1, x1y1, t ); + brw_ADD( p, t, param1, brw_imm_f( -1.0 ) ); + brw_MUL( p, x0y0, x0y0, param0 ); + brw_MUL( p, x0y1, x0y1, param0 ); + + /* y component */ + brw_MOV( p, tmp[ 5 ], low_words( tmp[ 3 ] ) ); + brw_MOV( p, tmp[ 7 ], high_words( tmp[ 3 ] ) ); + brw_MOV( p, tmp[ 4 ], low_words( tmp[ 2 ] ) ); + brw_MOV( p, tmp[ 6 ], high_words( tmp[ 2 ] ) ); + + brw_push_insn_state( p ); + brw_set_mask_control( p, BRW_MASK_DISABLE ); + brw_SHL( p, wtmp[ 2 ], wtmp[ 2 ], brw_imm_uw( 5 ) ); + brw_SHL( p, wtmp[ 3 ], wtmp[ 3 ], brw_imm_uw( 5 ) ); + brw_pop_insn_state( p ); + + brw_MUL( p, tmp[ 5 ], tmp[ 5 ], t ); + brw_MUL( p, tmp[ 7 ], tmp[ 7 ], t ); + brw_ADD( p, t, param2, brw_imm_f( -1.0 ) ); + brw_MUL( p, tmp[ 4 ], tmp[ 4 ], param1 ); + brw_MUL( p, tmp[ 6 ], tmp[ 6 ], param1 ); + + brw_ADD( p, x0y1, x0y1, tmp[ 5 ] ); + brw_ADD( p, x1y1, x1y1, tmp[ 7 ] ); + brw_ADD( p, x0y0, x0y0, tmp[ 4 ] ); + brw_ADD( p, x1y0, x1y0, tmp[ 6 ] ); + + /* z component */ + brw_MOV( p, tmp[ 4 ], low_words( tmp[ 2 ] ) ); + brw_MOV( p, tmp[ 5 ], low_words( tmp[ 3 ] ) ); + brw_MOV( p, tmp[ 6 ], high_words( tmp[ 2 ] ) ); + brw_MOV( p, tmp[ 7 ], high_words( tmp[ 3 ] ) ); + + brw_MUL( p, tmp[ 4 ], tmp[ 4 ], t ); + brw_MUL( p, tmp[ 5 ], tmp[ 5 ], t ); + brw_MUL( p, tmp[ 6 ], tmp[ 6 ], t ); + brw_MUL( p, tmp[ 7 ], tmp[ 7 ], t ); + + brw_ADD( p, x0y0, x0y0, tmp[ 4 ] ); + brw_ADD( p, x0y1, x0y1, tmp[ 5 ] ); + brw_ADD( p, x1y0, x1y0, tmp[ 6 ] ); + brw_ADD( p, x1y1, x1y1, tmp[ 7 ] ); + + /* The interpolation coefficients are still around from last time, so + again interpolate in the y dimension... */ + brw_ADD( p, x0y1, x0y1, negate( x0y0 ) ); + brw_ADD( p, x1y1, x1y1, negate( x1y0 ) ); + brw_MUL( p, x0y1, x0y1, yi ); + brw_MUL( p, x1y1, x1y1, yi ); + brw_ADD( p, x0y0, x0y0, x0y1 ); + brw_ADD( p, x1y0, x1y0, x1y1 ); + + /* And now in x. The rear face is in tmp[ 0 ] (see above), so this + time put the front face in tmp[ 1 ] and we're nearly there... */ + brw_ADD( p, x1y0, x1y0, negate( x0y0 ) ); + brw_MUL( p, x1y0, x1y0, xi ); + brw_ADD( p, tmp[ 1 ], x0y0, x1y0 ); + + /* The final interpolation, in the z dimension: */ + brw_ADD( p, tmp[ 1 ], tmp[ 1 ], negate( tmp[ 0 ] ) ); + brw_MUL( p, tmp[ 1 ], tmp[ 1 ], zi ); + brw_ADD( p, tmp[ 0 ], tmp[ 0 ], tmp[ 1 ] ); + + /* scale by pow( 2, -15 ), as described above */ + brw_MUL( p, param0, tmp[ 0 ], brw_imm_f( 0.000030517578125 ) ); + + release_tmps( c, mark ); +} + +static void emit_noise3( struct brw_wm_compile *c, + struct prog_instruction *inst ) +{ + struct brw_compile *p = &c->func; + struct brw_reg src0, src1, src2, param0, param1, param2, dst; + GLuint mask = inst->DstReg.WriteMask; + int i; + int mark = mark_tmps( c ); + + assert( mark == 0 ); + + src0 = get_src_reg( c, inst->SrcReg, 0, 1 ); + src1 = get_src_reg( c, inst->SrcReg, 1, 1 ); + src2 = get_src_reg( c, inst->SrcReg, 2, 1 ); + + param0 = alloc_tmp( c ); + param1 = alloc_tmp( c ); + param2 = alloc_tmp( c ); + + brw_MOV( p, param0, src0 ); + brw_MOV( p, param1, src1 ); + brw_MOV( p, param2, src2 ); + + invoke_subroutine( c, SUB_NOISE3, noise3_sub ); + + /* Fill in the result: */ + brw_set_saturate( p, inst->SaturateMode == SATURATE_ZERO_ONE ); + for (i = 0 ; i < 4; i++) { + if (mask & (1<<i)) { + dst = get_dst_reg(c, inst, i, 1); + brw_MOV( p, dst, param0 ); + } + } + if( inst->SaturateMode == SATURATE_ZERO_ONE ) + brw_set_saturate( p, 0 ); + + release_tmps( c, mark ); +} static void emit_wpos_xy(struct brw_wm_compile *c, struct prog_instruction *inst) @@ -1676,7 +1993,9 @@ static void brw_wm_emit_glsl(struct brw_context *brw, struct brw_wm_compile *c) case OPCODE_NOISE2: emit_noise2(c, inst); break; - /* case OPCODE_NOISE3: */ + case OPCODE_NOISE3: + emit_noise3(c, inst); + break; /* case OPCODE_NOISE4: */ /* not yet implemented */ case OPCODE_TEX: |