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vc4: Enable LIT lowering in TGSI instead of our own code.

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This brings us the -128/128 clamping on the w component.
This commit is contained in:
Eric Anholt 2014-09-30 13:27:36 -07:00
parent 9773d45908
commit ef9914aa74
1 changed files with 1 additions and 35 deletions
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36
src/gallium/drivers/vc4/vc4_program.c
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@ -490,40 +490,6 @@ tgsi_to_qir_mad(struct vc4_compile *c,
src[2 * 4 + i]);
}
static struct qreg
tgsi_to_qir_lit(struct vc4_compile *c,
struct tgsi_full_instruction *tgsi_inst,
enum qop op, struct qreg *src, int i)
{
struct qreg x = src[0 * 4 + 0];
struct qreg y = src[0 * 4 + 1];
struct qreg w = src[0 * 4 + 3];
switch (i) {
case 0:
case 3:
return qir_uniform_f(c, 1.0);
case 1:
return qir_FMAX(c, src[0 * 4 + 0], qir_uniform_f(c, 0.0));
case 2: {
struct qreg zero = qir_uniform_f(c, 0.0);
qir_SF(c, x);
/* XXX: Clamp w to -128..128 */
return qir_SEL_X_0_NC(c,
qir_EXP2(c, qir_FMUL(c,
w,
qir_LOG2(c,
qir_FMAX(c,
y,
zero)))));
}
default:
assert(!"not reached");
return c->undef;
}
}
static struct qreg
tgsi_to_qir_lrp(struct vc4_compile *c,
struct tgsi_full_instruction *tgsi_inst,
@ -1097,7 +1063,6 @@ emit_tgsi_instruction(struct vc4_compile *c,
[TGSI_OPCODE_RSQ] = { QOP_RSQ, tgsi_to_qir_scalar },
[TGSI_OPCODE_EX2] = { QOP_EXP2, tgsi_to_qir_scalar },
[TGSI_OPCODE_LG2] = { QOP_LOG2, tgsi_to_qir_scalar },
[TGSI_OPCODE_LIT] = { 0, tgsi_to_qir_lit },
[TGSI_OPCODE_LRP] = { 0, tgsi_to_qir_lrp },
[TGSI_OPCODE_TRUNC] = { 0, tgsi_to_qir_trunc },
[TGSI_OPCODE_FRC] = { 0, tgsi_to_qir_frc },
@ -1720,6 +1685,7 @@ vc4_shader_state_create(struct pipe_context *pctx,
.lower_XPD = true,
.lower_SCS = true,
.lower_POW = true,
.lower_LIT = true,
.lower_EXP = true,
.lower_LOG = true,
.lower_DP4 = true,