From: Iago Toral Quiroga Date: Tue, 28 Jun 2016 09:54:07 +0000 (+0200) Subject: i965/vec4: do not split scratch read/write opcodes X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=07bc6a35d3d6d94d45b81bd10002f0e420d855c2;p=mesa.git i965/vec4: do not split scratch read/write opcodes 64-bit scratch read/writes require to shuffle data around so we need to have access to the full 64-bit data. We will do the right thing for these when we emit the messages. Reviewed-by: Matt Turner --- diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp index f198fad8514..29bf7863d69 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp @@ -2035,6 +2035,15 @@ static unsigned get_lowered_simd_width(const struct gen_device_info *devinfo, const vec4_instruction *inst) { + /* Do not split some instructions that require special handling */ + switch (inst->opcode) { + case SHADER_OPCODE_GEN4_SCRATCH_READ: + case SHADER_OPCODE_GEN4_SCRATCH_WRITE: + return inst->exec_size; + default: + break; + } + unsigned lowered_width = MIN2(16, inst->exec_size); /* We need to split some cases of double-precision instructions that write