diff options
| author | Patrick Rudolph <siro@das-labor.org> | 2016-03-28 11:52:00 +0200 |
|---|---|---|
| committer | Emil Velikov <emil.l.velikov@gmail.com> | 2016-05-05 13:59:32 +0100 |
| commit | 143161ad97581388b6a34037a2bfd697098868e8 (patch) | |
| tree | 10dbffbf5c5d6365eeca3accbf9f94bee9ebea18 | |
| parent | b649b62abb4bcc6f018b68b885c08b1d4d7c26c0 (diff) | |
r600g: fix and optimize tgsi_cmp when using ABS and NEG modifier
Some apps set NEG and ABS on the source param to test for zero.
Use ALU_OP3_CNDE insted of ALU_OP3_CNDGE and unset both modifiers.
It also removes the need for a MOV instruction, as ABS isn't
supported on op3.
Tested on AMD CAYMAN and AMD RV770.
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit fb5d38e21982e9eb3195c61d020c9772b73bdbcf)
| -rw-r--r-- | src/gallium/drivers/r600/r600_shader.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c index df40f94bdc..8b684f6970 100644 --- a/src/gallium/drivers/r600/r600_shader.c +++ b/src/gallium/drivers/r600/r600_shader.c @@ -7787,6 +7787,15 @@ static int tgsi_cmp(struct r600_shader_ctx *ctx) int i, r, j; int lasti = tgsi_last_instruction(inst->Dst[0].Register.WriteMask); int temp_regs[3]; + unsigned op; + + if (ctx->src[0].abs && ctx->src[0].neg) { + op = ALU_OP3_CNDE; + ctx->src[0].abs = 0; + ctx->src[0].neg = 0; + } else { + op = ALU_OP3_CNDGE; + } for (j = 0; j < inst->Instruction.NumSrcRegs; j++) { temp_regs[j] = 0; @@ -7799,7 +7808,7 @@ static int tgsi_cmp(struct r600_shader_ctx *ctx) continue; memset(&alu, 0, sizeof(struct r600_bytecode_alu)); - alu.op = ALU_OP3_CNDGE; + alu.op = op; r = tgsi_make_src_for_op3(ctx, temp_regs[0], i, &alu.src[0], &ctx->src[0]); if (r) return r; |