diff options
| -rw-r--r-- | src/gallium/drivers/r600/r600_shader.c | 61 |
1 files changed, 35 insertions, 26 deletions
diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c index bce52973136..523b6d24515 100644 --- a/src/gallium/drivers/r600/r600_shader.c +++ b/src/gallium/drivers/r600/r600_shader.c @@ -926,38 +926,47 @@ static int tgsi_scs(struct r600_shader_ctx *ctx) struct r600_bc_alu alu; int r; - r = tgsi_setup_trig(ctx, r600_src); - if (r) - return r; - + /* We'll only need the trig stuff if we are going to write to the + * X or Y components of the destination vector. + */ + if (likely(inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_XY)) { + r = tgsi_setup_trig(ctx, r600_src); + if (r) + return r; + } /* dst.x = COS */ - memset(&alu, 0, sizeof(struct r600_bc_alu)); - alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_COS); - r = tgsi_dst(ctx, &inst->Dst[0], 0, &alu.dst); - if (r) - return r; + if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_X) { + memset(&alu, 0, sizeof(struct r600_bc_alu)); + alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_COS); + r = tgsi_dst(ctx, &inst->Dst[0], 0, &alu.dst); + if (r) + return r; - alu.src[0].sel = ctx->temp_reg; - alu.src[0].chan = 0; - alu.last = 1; - r = r600_bc_add_alu(ctx->bc, &alu); - if (r) - return r; + alu.src[0].sel = ctx->temp_reg; + alu.src[0].chan = 0; + alu.last = 1; + r = r600_bc_add_alu(ctx->bc, &alu); + if (r) + return r; + } /* dst.y = SIN */ - memset(&alu, 0, sizeof(struct r600_bc_alu)); - alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_SIN); - r = tgsi_dst(ctx, &inst->Dst[0], 1, &alu.dst); - if (r) - return r; + if (inst->Dst[0].Register.WriteMask & TGSI_WRITEMASK_Y) { + memset(&alu, 0, sizeof(struct r600_bc_alu)); + alu.inst = CTX_INST(V_SQ_ALU_WORD1_OP2_SQ_OP2_INST_SIN); + r = tgsi_dst(ctx, &inst->Dst[0], 1, &alu.dst); + if (r) + return r; + + alu.src[0].sel = ctx->temp_reg; + alu.src[0].chan = 0; + alu.last = 1; + r = r600_bc_add_alu(ctx->bc, &alu); + if (r) + return r; + } - alu.src[0].sel = ctx->temp_reg; - alu.src[0].chan = 0; - alu.last = 1; - r = r600_bc_add_alu(ctx->bc, &alu); - if (r) - return r; return 0; } |