diff options
| author | Eric Anholt <[email protected]> | 2014-07-16 09:08:48 -0700 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2014-08-08 18:59:47 -0700 |
| commit | 6ff2129d5842898eb87d2a457ee018fe66471f06 (patch) | |
| tree | 0fedcae3e82d9623aa5c9ddf12ac0158e7d62fdd /src | |
| parent | 63e49da0a58d6579162f12b4c8e68696eeb6c833 (diff) | |
vc4: Add support for the lit opcode.
v2: Fix how it was using the X channel for the real work of the opcode,
instead of Y. Fixes glean's LIT test.
v3: Rebase on the helpers.
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_program.c | 38 | ||||
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_qir.h | 8 |
2 files changed, 45 insertions, 1 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index 005b986829a..1cf518dceb2 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -225,6 +225,42 @@ tgsi_to_qir_mad(struct tgsi_to_qir *trans, } static struct qreg +tgsi_to_qir_lit(struct tgsi_to_qir *trans, + struct tgsi_full_instruction *tgsi_inst, + enum qop op, struct qreg *src, int i) +{ + struct qcompile *c = trans->c; + 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(trans, 1.0); + case 1: + return qir_FMAX(c, src[0 * 4 + 0], qir_uniform_f(trans, 0.0)); + case 2: { + struct qreg zero = qir_uniform_f(trans, 0.0); + + /* XXX: Clamp w to -128..128 */ + return qir_CMP(c, + x, + zero, + 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 tgsi_to_qir *trans, struct tgsi_full_instruction *tgsi_inst, enum qop op, struct qreg *src, int i) @@ -372,7 +408,7 @@ emit_tgsi_instruction(struct tgsi_to_qir *trans, [TGSI_OPCODE_RSQ] = { QOP_RSQ, tgsi_to_qir_alu }, [TGSI_OPCODE_EX2] = { QOP_EXP2, tgsi_to_qir_alu }, [TGSI_OPCODE_LG2] = { QOP_LOG2, tgsi_to_qir_alu }, - [TGSI_OPCODE_LIT] = { QOP_MOV, tgsi_to_qir_alu }, /* XXX */ + [TGSI_OPCODE_LIT] = { 0, tgsi_to_qir_lit }, [TGSI_OPCODE_LRP] = { 0, tgsi_to_qir_lrp }, [TGSI_OPCODE_POW] = { 0, tgsi_to_qir_pow }, }; diff --git a/src/gallium/drivers/vc4/vc4_qir.h b/src/gallium/drivers/vc4/vc4_qir.h index 5332478039a..ff222e4aeff 100644 --- a/src/gallium/drivers/vc4/vc4_qir.h +++ b/src/gallium/drivers/vc4/vc4_qir.h @@ -198,4 +198,12 @@ qir_VPM_WRITE(struct qcompile *c, struct qreg a) qir_emit(c, qir_inst(QOP_VPM_WRITE, c->undef, a, c->undef)); } +static inline struct qreg +qir_CMP(struct qcompile *c, struct qreg cmp, struct qreg a, struct qreg b) +{ + struct qreg t = qir_get_temp(c); + qir_emit(c, qir_inst4(QOP_CMP, t, cmp, a, b, c->undef)); + return t; +} + #endif /* VC4_QIR_H */ |