On 06/01/2016 05:28 AM, Nicolai Hähnle wrote:
From: Nicolai Hähnle <nicolai.haeh...@amd.com>Cc: 12.0 <mesa-sta...@lists.freedesktop.org> --- src/gallium/auxiliary/tgsi/tgsi_scan.c | 26 ++++++++++++++++++++++++++ src/gallium/auxiliary/tgsi/tgsi_scan.h | 1 + 2 files changed, 27 insertions(+) diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c index 1baf031..d202ab1 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_scan.c +++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c @@ -68,6 +68,29 @@ is_texture_inst(unsigned opcode) tgsi_get_opcode_info(opcode)->is_tex); } + +/** + * Is the opcode an instruction which computes a derivative explicitly or + * implicitly? + */ +static bool +computes_derivative(unsigned opcode) +{ + if (tgsi_get_opcode_info(opcode)->is_tex) { + return opcode != TGSI_OPCODE_TXD && + opcode != TGSI_OPCODE_TXL && + opcode != TGSI_OPCODE_TXL2 && + opcode != TGSI_OPCODE_TXF && + opcode != TGSI_OPCODE_TXQ && + opcode != TGSI_OPCODE_TXQ_LZ && + opcode != TGSI_OPCODE_TXQS; + } + + return opcode == TGSI_OPCODE_DDX || opcode == TGSI_OPCODE_DDX_FINE || + opcode == TGSI_OPCODE_DDY || opcode == TGSI_OPCODE_DDY_FINE; +} + + static void scan_instruction(struct tgsi_shader_info *info, const struct tgsi_full_instruction *fullinst, @@ -263,6 +286,9 @@ scan_instruction(struct tgsi_shader_info *info, if (is_mem_inst) info->num_memory_instructions++; + if (computes_derivative(fullinst->Instruction.Opcode)) + info->uses_derivatives = true; + info->num_instructions++; } diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h index 31adce7..f7eefa4 100644 --- a/src/gallium/auxiliary/tgsi/tgsi_scan.h +++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h @@ -115,6 +115,7 @@ struct tgsi_shader_info boolean writes_memory; /**< contains stores or atomics to buffers or images */ boolean is_msaa_sampler[PIPE_MAX_SAMPLERS]; boolean uses_doubles; /**< uses any of the double instructions */ + boolean uses_derivatives; unsigned clipdist_writemask; unsigned culldist_writemask; unsigned num_written_culldistance;
Reviewed-by: Brian Paul <bri...@vmware.com> _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
