KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

vc4: Add support for the LRP opcode. 

v2: Rebase on helpers, cutting out most of the code in this change.
This commit is contained in:
Eric Anholt 2014-07-15 11:04:41 -07:00
parent ec9da314ba
commit 6c185bd263
1 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
src/gallium/drivers/vc4/vc4_program.c
View File

@ -223,6 +223,25 @@ tgsi_to_qir_mad(struct tgsi_to_qir *trans,
src[2 * 4 + i]);
}
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,
@ -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;