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vc4: Add support for the FLR opcode.

This commit is contained in:
Eric Anholt 2014-08-11 15:24:43 -07:00
parent 8c229d306b
commit b9eb3d4bee
1 changed files with 18 additions and 0 deletions
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18
src/gallium/drivers/vc4/vc4_program.c
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@ -390,6 +390,23 @@ tgsi_to_qir_frc(struct tgsi_to_qir *trans,
diff);
}
/**
* Computes floor(x), which is tricky because our FTOI truncates (rounds to
* zero).
*/
static struct qreg
tgsi_to_qir_flr(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 trunc = qir_ITOF(c, qir_FTOI(c, src[0 * 4 + i]));
return qir_CMP(c,
src[0 * 4 + i],
qir_FSUB(c, trunc, qir_uniform_f(trans, 1.0)),
trunc);
}
static struct qreg
tgsi_to_qir_dp(struct tgsi_to_qir *trans,
struct tgsi_full_instruction *tgsi_inst,
@ -665,6 +682,7 @@ emit_tgsi_instruction(struct tgsi_to_qir *trans,
[TGSI_OPCODE_POW] = { 0, tgsi_to_qir_pow },
[TGSI_OPCODE_TRUNC] = { 0, tgsi_to_qir_trunc },
[TGSI_OPCODE_FRC] = { 0, tgsi_to_qir_frc },
[TGSI_OPCODE_FLR] = { 0, tgsi_to_qir_flr },
[TGSI_OPCODE_SIN] = { 0, tgsi_to_qir_sin },
[TGSI_OPCODE_COS] = { 0, tgsi_to_qir_cos },
};