diff options
| author | Patrick Rudolph <[email protected]> | 2016-03-28 11:52:00 +0200 |
|---|---|---|
| committer | Dave Airlie <[email protected]> | 2016-04-27 12:48:50 +1000 |
| commit | fb5d38e21982e9eb3195c61d020c9772b73bdbcf (patch) | |
| tree | a1ee316f8a34030850300abd2c51c2a288404034 /src/gallium | |
| parent | 7aa3a936564f43e46f7cc706670f7995752d1e41 (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 <[email protected]>
Cc: [email protected]
Signed-off-by: Dave Airlie <[email protected]>
Diffstat (limited to 'src/gallium')
| -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 64b049a1ced..cd5ae449dee 100644 --- a/src/gallium/drivers/r600/r600_shader.c +++ b/src/gallium/drivers/r600/r600_shader.c @@ -7707,6 +7707,15 @@ 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; @@ -7719,7 +7728,7 @@ 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; |