diff options
| author | Brian <[email protected]> | 2008-05-01 18:42:01 -0600 |
|---|---|---|
| committer | Brian <[email protected]> | 2008-05-01 18:42:01 -0600 |
| commit | 7a4313b63bcd06318437d384875472e7139070a1 (patch) | |
| tree | 49fdf56b883d5f8b172d64f6c5a63e9c5cff5a42 | |
| parent | bc4952987419d77fabbf4fa43913f6e488bdb211 (diff) | |
gallium: implement TGSI_OPCODE_LOG
| -rw-r--r-- | src/gallium/auxiliary/tgsi/exec/tgsi_exec.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/src/gallium/auxiliary/tgsi/exec/tgsi_exec.c b/src/gallium/auxiliary/tgsi/exec/tgsi_exec.c index d55f907c0d3..4b33d7e8bd1 100644 --- a/src/gallium/auxiliary/tgsi/exec/tgsi_exec.c +++ b/src/gallium/auxiliary/tgsi/exec/tgsi_exec.c @@ -1549,22 +1549,24 @@ exec_instruction( break; case TGSI_OPCODE_LOG: - debug_printf("TGSI: LOG opcode not implemented\n"); - /* from ARB_v_p: - tmp = fabs(ScalarLoad(op0)); - result.x = floor(log2(tmp)); - result.y = tmp / 2^(floor(log2(tmp))); - result.z = RoughApproxLog2(tmp); - result.w = 1.0; - */ -#if 0 - /* something like this: */ FETCH( &r[0], 0, CHAN_X ); - micro_lg2( &r[0], &r[0] ); - FOR_EACH_ENABLED_CHANNEL( *inst, chan_index ) { - STORE( &r[0], 0, chan_index ); + micro_abs( &r[2], &r[0] ); /* r2 = abs(r0) */ + micro_lg2( &r[1], &r[2] ); /* r1 = lg2(r2) */ + micro_flr( &r[0], &r[1] ); /* r0 = floor(r1) */ + if (IS_CHANNEL_ENABLED( *inst, CHAN_X )) { + STORE( &r[0], 0, CHAN_X ); + } + if (IS_CHANNEL_ENABLED( *inst, CHAN_Y )) { + micro_exp2( &r[0], &r[0] ); /* r0 = 2 ^ r0 */ + micro_div( &r[0], &r[2], &r[0] ); /* r0 = r2 / r0 */ + STORE( &r[0], 0, CHAN_Y ); + } + if (IS_CHANNEL_ENABLED( *inst, CHAN_Z )) { + STORE( &r[1], 0, CHAN_Z ); + } + if (IS_CHANNEL_ENABLED( *inst, CHAN_W )) { + STORE( &mach->Temps[TEMP_1_I].xyzw[TEMP_1_C], 0, CHAN_W ); } -#endif break; case TGSI_OPCODE_MUL: |