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i965: minor clean-up, comments, etc.

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(cherry picked from commit 9e7903e492)
This commit is contained in:
Brian Paul 2009-01-28 14:48:41 -07:00 • committed by Ian Romanick
parent 00aea5853d
commit 3217ea8a1d
1 changed files with 31 additions and 15 deletions
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46
src/mesa/drivers/dri/i965/brw_wm_fp.c
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@ -553,12 +553,19 @@ static void precalc_lit( struct brw_wm_compile *c,
}
}
/**
* Some TEX instructions require extra code, cube map coordinate
* normalization, or coordinate scaling for RECT textures, etc.
* This function emits those extra instructions and the TEX
* instruction itself.
*/
static void precalc_tex( struct brw_wm_compile *c,
const struct prog_instruction *inst )
{
struct prog_src_register coord;
struct prog_dst_register tmpcoord;
GLuint unit = c->fp->program.Base.SamplerUnits[inst->TexSrcUnit];
const GLuint unit = c->fp->program.Base.SamplerUnits[inst->TexSrcUnit];
if (inst->TexSrcTarget == TEXTURE_CUBE_INDEX) {
struct prog_instruction *out;
@ -568,9 +575,11 @@ static void precalc_tex( struct brw_wm_compile *c,
struct prog_src_register tmp1src = src_reg_from_dst(tmp1);
struct prog_src_register src0 = inst->SrcReg[0];
/* find longest component of coord vector and normalize it */
tmpcoord = get_temp(c);
coord = src_reg_from_dst(tmpcoord);
/* tmpcoord = src0 (i.e.: coord = src0) */
out = emit_op(c, OPCODE_MOV,
tmpcoord,
0, 0, 0,
@ -580,6 +589,7 @@ static void precalc_tex( struct brw_wm_compile *c,
out->SrcReg[0].NegateBase = 0;
out->SrcReg[0].Abs = 1;
/* tmp0 = MAX(coord.X, coord.Y) */
emit_op(c, OPCODE_MAX,
tmp0,
0, 0, 0,
@ -587,6 +597,7 @@ static void precalc_tex( struct brw_wm_compile *c,
src_swizzle1(coord, Y),
src_undef());
/* tmp1 = MAX(tmp0, coord.Z) */
emit_op(c, OPCODE_MAX,
tmp1,
0, 0, 0,
@ -594,6 +605,7 @@ static void precalc_tex( struct brw_wm_compile *c,
src_swizzle1(coord, Z),
src_undef());
/* tmp0 = 1 / tmp1 */
emit_op(c, OPCODE_RCP,
tmp0,
0, 0, 0,
@ -601,6 +613,7 @@ static void precalc_tex( struct brw_wm_compile *c,
src_undef(),
src_undef());
/* tmpCoord = src0 * tmp0 */
emit_op(c, OPCODE_MUL,
tmpcoord,
0, 0, 0,
@ -610,7 +623,8 @@ static void precalc_tex( struct brw_wm_compile *c,
release_temp(c, tmp0);
release_temp(c, tmp1);
} else if (inst->TexSrcTarget == TEXTURE_RECT_INDEX) {
}
else if (inst->TexSrcTarget == TEXTURE_RECT_INDEX) {
struct prog_src_register scale =
search_or_add_param5( c,
STATE_INTERNAL,
@ -641,19 +655,9 @@ static void precalc_tex( struct brw_wm_compile *c,
* conversion requires allocating a temporary variable which we
* don't have the facility to do that late in the compilation.
*/
if (!(c->key.yuvtex_mask & (1<<unit))) {
emit_op(c,
OPCODE_TEX,
inst->DstReg,
inst->SaturateMode,
unit,
inst->TexSrcTarget,
coord,
src_undef(),
src_undef());
}
else {
GLboolean swap_uv = c->key.yuvtex_swap_mask & (1<<unit);
if (c->key.yuvtex_mask & (1 << unit)) {
/* convert ycbcr to RGBA */
GLboolean swap_uv = c->key.yuvtex_swap_mask & (1<<unit);
/*
CONST C0 = { -.5, -.0625, -.5, 1.164 }
@ -733,6 +737,18 @@ static void precalc_tex( struct brw_wm_compile *c,
release_temp(c, tmp);
}
else {
/* ordinary RGBA tex instruction */
emit_op(c,
OPCODE_TEX,
inst->DstReg,
inst->SaturateMode,
unit,
inst->TexSrcTarget,
coord,
src_undef(),
src_undef());
}
if ((inst->TexSrcTarget == TEXTURE_RECT_INDEX) ||
(inst->TexSrcTarget == TEXTURE_CUBE_INDEX))