diff options
| author | Eric Anholt <[email protected]> | 2014-07-15 11:04:41 -0700 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2014-08-08 18:59:47 -0700 |
| commit | 6c185bd26352428a9e3e546b5738f0ffbea69236 (patch) | |
| tree | ddb618b309e0a0ed8ccacadff7dfc943376e8e35 | |
| parent | ec9da314baf11bea57f315346091ae941ac4f662 (diff) | |
vc4: Add support for the LRP opcode.
v2: Rebase on helpers, cutting out most of the code in this change.
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_program.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index d1961d691df..764c93b2464 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -224,6 +224,25 @@ tgsi_to_qir_mad(struct tgsi_to_qir *trans, } 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) +{ + struct qcompile *c = trans->c; + struct qreg src0 = src[0 * 4 + i]; + struct qreg src1 = src[1 * 4 + i]; + struct qreg src2 = src[2 * 4 + i]; + + /* LRP is: + * src0 * src1 + (1 - src0) * src2. + * -> src0 * src1 + src2 - src0 * src2 + * -> src2 + src0 * (src1 - src2) + */ + return qir_FADD(c, src2, qir_FMUL(c, src0, qir_FSUB(c, src1, src2))); + +} + +static struct qreg tgsi_to_qir_dp(struct tgsi_to_qir *trans, struct tgsi_full_instruction *tgsi_inst, int num, struct qreg *src, int i) @@ -339,6 +358,7 @@ emit_tgsi_instruction(struct tgsi_to_qir *trans, [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_LRP] = { 0, tgsi_to_qir_lrp }, }; static int asdf = 0; uint32_t tgsi_op = tgsi_inst->Instruction.Opcode; |