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i965: fix pixel w interpolation on sandybridge

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(cherry picked from commit 15a8e7ec90)
This commit is contained in:
Zhenyu Wang 2010-09-25 10:50:24 +08:00 • committed by Ian Romanick
parent e00bb8732c
commit 3dd52d51ce
1 changed files with 16 additions and 4 deletions
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20
src/mesa/drivers/dri/i965/brw_wm_emit.c
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@ -269,6 +269,13 @@ void emit_pixel_w(struct brw_wm_compile *c,
{
struct brw_compile *p = &c->func;
struct intel_context *intel = &p->brw->intel;
struct brw_reg src;
struct brw_reg temp_dst;
if (intel->gen >= 6)
temp_dst = dst[3];
else
temp_dst = brw_message_reg(2);
assert(intel->gen < 6);
@ -282,24 +289,29 @@ void emit_pixel_w(struct brw_wm_compile *c,
* result straight into a message reg.
*/
if (can_do_pln(intel, deltas)) {
brw_PLN(p, brw_message_reg(2), interp3, deltas[0]);
brw_PLN(p, temp_dst, interp3, deltas[0]);
} else {
brw_LINE(p, brw_null_reg(), interp3, deltas[0]);
brw_MAC(p, brw_message_reg(2), suboffset(interp3, 1), deltas[1]);
brw_MAC(p, temp_dst, suboffset(interp3, 1), deltas[1]);
}
/* Calc w */
if (intel->gen >= 6)
src = temp_dst;
else
src = brw_null_reg();
if (c->dispatch_width == 16) {
brw_math_16(p, dst[3],
BRW_MATH_FUNCTION_INV,
BRW_MATH_SATURATE_NONE,
2, brw_null_reg(),
2, src,
BRW_MATH_PRECISION_FULL);
} else {
brw_math(p, dst[3],
BRW_MATH_FUNCTION_INV,
BRW_MATH_SATURATE_NONE,
2, brw_null_reg(),
2, src,
BRW_MATH_DATA_VECTOR,
BRW_MATH_PRECISION_FULL);
}