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i965: comments for sampling code

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This commit is contained in:
Brian Paul
2009-03-24 18:05:29 -06:00
parent 154cd7a723
commit e1a1a5a638
1 changed files with 28 additions and 28 deletions
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src/mesa/drivers/dri/i965/brw_wm_glsl.c
+28 -28
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@@ -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));