From 395c7597125c08730857135df6e79417433d551f Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Fri, 13 Jun 2014 15:09:12 -0700 Subject: [PATCH] i965: Introduce a new brw_compact_inst API. For now nothing uses this, but we can incrementally convert. Signed-off-by: Matt Turner Reviewed-by: Kenneth Graunke --- src/mesa/drivers/dri/i965/brw_inst.h | 90 ++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) diff --git a/src/mesa/drivers/dri/i965/brw_inst.h b/src/mesa/drivers/dri/i965/brw_inst.h index e899286ca4b..7c0cfaaed4f 100644 --- a/src/mesa/drivers/dri/i965/brw_inst.h +++ b/src/mesa/drivers/dri/i965/brw_inst.h @@ -692,6 +692,96 @@ brw_inst_set_bits(brw_inst *inst, unsigned high, unsigned low, uint64_t value) #undef F #undef FC +typedef struct { + uint64_t data; +} brw_compact_inst; + +/** + * Fetch a set of contiguous bits from the compacted instruction. + * + * Bits indices range from 0..63. + */ +static inline unsigned +brw_compact_inst_bits(brw_compact_inst *inst, unsigned high, unsigned low) +{ + const uint64_t mask = (((1ull << (high - low + 1)) - 1) << low); + + return (inst->data & mask) >> low; +} + +/** + * Set bits in the compacted instruction. + * + * Bits indices range from 0..63. + */ +static inline void +brw_compact_inst_set_bits(brw_compact_inst *inst, unsigned high, unsigned low, + uint64_t value) +{ + const uint64_t mask = (((1ull << (high - low + 1)) - 1) << low); + + /* Make sure the supplied value actually fits in the given bitfield. */ + assert((value & (mask >> low)) == value); + + inst->data = (inst->data & ~mask) | ((value << low) & mask); +} + +#define F(name, high, low) \ +static inline void \ +brw_compact_inst_set_##name(struct brw_compact_instruction *insn, unsigned v) \ +{ \ + brw_compact_inst *inst = (brw_compact_inst *)insn; \ + brw_compact_inst_set_bits(inst, high, low, v); \ +} \ + \ +static inline unsigned \ +brw_compact_inst_##name(struct brw_compact_instruction *insn) \ +{ \ + brw_compact_inst *inst = (brw_compact_inst *)insn; \ + return brw_compact_inst_bits(inst, high, low); \ +} + +F(src1_reg_nr, 63, 56) +F(src0_reg_nr, 55, 48) +F(dst_reg_nr, 47, 40) +F(src1_index, 39, 35) +F(src0_index, 34, 30) +F(cmpt_control, 29, 29) /* Same location as brw_inst */ +F(flag_subreg_nr, 28, 28) /* <= Gen6 only */ +F(cond_modifier, 27, 24) /* Same location as brw_inst */ +F(acc_wr_control, 23, 23) +F(subreg_index, 22, 18) +F(datatype_index, 17, 13) +F(control_index, 12, 8) +F(debug_control, 7, 7) +F(opcode, 6, 0) /* Same location as brw_inst */ + +/** + * (Gen8+) Compacted three-source instructions: + * @{ + */ +F(3src_src2_reg_nr, 63, 57) +F(3src_src1_reg_nr, 56, 50) +F(3src_src0_reg_nr, 49, 43) +F(3src_src2_subreg_nr, 42, 40) +F(3src_src1_subreg_nr, 39, 37) +F(3src_src0_subreg_nr, 36, 34) +F(3src_src2_rep_ctrl, 33, 33) +F(3src_src1_rep_ctrl, 32, 32) +F(3src_saturate, 31, 31) +F(3src_debug_control, 30, 30) +F(3src_cmpt_control, 29, 29) +F(3src_src0_rep_ctrl, 28, 28) +/* Reserved */ +F(3src_dst_reg_nr, 18, 12) +F(3src_source_index, 11, 10) +F(3src_control_index, 9, 8) +/* Bit 7 is Reserved (for future Opcode expansion) */ +F(3src_opcode, 6, 0) +/** @} */ + +#undef F + #ifdef __cplusplus } #endif -- 2.30.2