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authorEric Anholt <[email protected]>2014-08-11 15:24:43 -0700
committerEric Anholt <[email protected]>2014-08-12 14:03:34 -0700
commitb9eb3d4bee7591dacdf47835e5212962b2290dbf (patch)
tree4bbfb3363dace9262f5713e04edf8afea482f728 /src/gallium/drivers
parent8c229d306b3f312adbdfbaf79967ee43fbfc839e (diff)
vc4: Add support for the FLR opcode.
Diffstat (limited to 'src/gallium/drivers')
-rw-r--r--src/gallium/drivers/vc4/vc4_program.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index d871dcd88d3..c87ea52c25e 100644
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -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 },
};