diff options
| author | Brian Paul <[email protected]> | 2009-03-24 18:05:29 -0600 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2009-04-03 09:07:03 -0600 |
| commit | e1a1a5a6385e0bc6f2f20ec0a2e23f81726e232e (patch) | |
| tree | fe7f4f9fb5e21d243dabd474e8891727dcaf2493 | |
| parent | 154cd7a72363513f2d3d8d83fe19d69518df7d2e (diff) | |
i965: comments for sampling code
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm_glsl.c | 56 |
1 files changed, 28 insertions, 28 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm_glsl.c b/src/mesa/drivers/dri/i965/brw_wm_glsl.c index 00f2d3af855..4e99611be81 100644 --- a/src/mesa/drivers/dri/i965/brw_wm_glsl.c +++ b/src/mesa/drivers/dri/i965/brw_wm_glsl.c @@ -2336,9 +2336,9 @@ static void emit_txb(struct brw_wm_compile *c, switch (inst->TexSrcTarget) { case TEXTURE_1D_INDEX: - brw_MOV(p, brw_message_reg(2), src[0]); - brw_MOV(p, brw_message_reg(3), brw_imm_f(0)); - brw_MOV(p, brw_message_reg(4), brw_imm_f(0)); + brw_MOV(p, brw_message_reg(2), src[0]); /* s coord */ + brw_MOV(p, brw_message_reg(3), brw_imm_f(0)); /* t coord */ + brw_MOV(p, brw_message_reg(4), brw_imm_f(0)); /* r coord */ break; case TEXTURE_2D_INDEX: case TEXTURE_RECT_INDEX: @@ -2352,19 +2352,19 @@ static void emit_txb(struct brw_wm_compile *c, brw_MOV(p, brw_message_reg(4), src[2]); break; } - brw_MOV(p, brw_message_reg(5), src[3]); - brw_MOV(p, brw_message_reg(6), brw_imm_f(0)); + brw_MOV(p, brw_message_reg(5), src[3]); /* bias */ + brw_MOV(p, brw_message_reg(6), brw_imm_f(0)); /* ref (unused?) */ brw_SAMPLE(p, - retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW), - 1, - retype(payload_reg, BRW_REGISTER_TYPE_UW), - unit + MAX_DRAW_BUFFERS, /* surface */ - unit, /* sampler */ - inst->DstReg.WriteMask, - BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_BIAS, - 4, - 4, - 0); + retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW), /* dest */ + 1, /* msg_reg_nr */ + retype(payload_reg, BRW_REGISTER_TYPE_UW), /* src0 */ + unit + MAX_DRAW_BUFFERS, /* surface */ + unit, /* sampler */ + inst->DstReg.WriteMask, /* writemask */ + BRW_SAMPLER_MESSAGE_SIMD16_SAMPLE_BIAS, /* msg_type */ + 4, /* response_length */ + 4, /* msg_length */ + 0); /* eot */ } static void emit_tex(struct brw_wm_compile *c, @@ -2386,7 +2386,6 @@ static void emit_tex(struct brw_wm_compile *c, for (i = 0; i < 4; i++) src[i] = get_src_reg(c, &inst->SrcReg[0], i); - switch (inst->TexSrcTarget) { case TEXTURE_1D_INDEX: emit = WRITEMASK_X; @@ -2404,6 +2403,7 @@ static void emit_tex(struct brw_wm_compile *c, } msg_len = 1; + /* move/load S, T, R coords */ for (i = 0; i < nr; i++) { static const GLuint swz[4] = {0,1,2,2}; if (emit & (1<<i)) @@ -2414,21 +2414,21 @@ static void emit_tex(struct brw_wm_compile *c, } if (shadow) { - brw_MOV(p, brw_message_reg(5), brw_imm_f(0)); - brw_MOV(p, brw_message_reg(6), src[2]); + brw_MOV(p, brw_message_reg(5), brw_imm_f(0)); /* lod / bais */ + brw_MOV(p, brw_message_reg(6), src[2]); /* ref value / R coord */ } brw_SAMPLE(p, - retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW), - 1, - retype(payload_reg, BRW_REGISTER_TYPE_UW), - unit + MAX_DRAW_BUFFERS, /* surface */ - unit, /* sampler */ - inst->DstReg.WriteMask, - BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE, - 4, - shadow ? 6 : 4, - 0); + retype(vec8(dst[0]), BRW_REGISTER_TYPE_UW), /* dest */ + 1, /* msg_reg_nr */ + retype(payload_reg, BRW_REGISTER_TYPE_UW), /* src0 */ + unit + MAX_DRAW_BUFFERS, /* surface */ + unit, /* sampler */ + inst->DstReg.WriteMask, /* writemask */ + BRW_SAMPLER_MESSAGE_SIMD8_SAMPLE, /* msg_type */ + 4, /* response_length */ + shadow ? 6 : 4, /* msg_length */ + 0); /* eot */ if (shadow) brw_MOV(p, dst[3], brw_imm_f(1.0)); |