| Message ID | 1401898871-2270-7-git-send-email-omair.javaid@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 4 June 2014 17:21, Omair Javaid <omair.javaid@linaro.org> wrote: > This patch adds support for recording A64 advance simd load/store and > data processing instructions on aarch64-linux targets. > > gdb: > > 2014-06-04 Omair Javaid <omair.javaid@linaro.org> > > * aarch64-tdep.c (aarch64_record_load_store): Updated. > (aarch64_record_data_proc_simd_fp): New function. > (aarch64_record_decode_insn_handler): Updated. > (aarch64_record_asimd_load_store): New function. > > --- > gdb/aarch64-tdep.c | 227 ++++++++++++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 225 insertions(+), 2 deletions(-) > > diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c > index 2e2dc15..221006a 100644 > --- a/gdb/aarch64-tdep.c > +++ b/gdb/aarch64-tdep.c > @@ -2988,6 +2988,144 @@ aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r) > return AARCH64_RECORD_SUCCESS; > } > > +/* Record handler for advance simd load and store instructions. */ I guess we should be consistent and call it "Advanced SIMD". > +static unsigned int > +aarch64_record_asimd_load_store (insn_decode_record *aarch64_insn_r) > +{ > + CORE_ADDR address; > + uint64_t addr_offset = 0; > + uint32_t record_buf[24]; > + uint64_t record_buf_mem[24]; > + uint32_t reg_rn, reg_rt, reg_rm; > + uint32_t reg_index = 0, mem_index = 0; > + uint8_t eindex, rindex, sindex, reg_tt, replicate; > + uint8_t elements, esize, rpt, selem, ebytes, single, scale; I don't think ebytes is used. > + uint8_t opcode_bits, qbit, size_bits, ld_flag, data_size, wback; And qbit seems not to be used either. > + > + reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); > + reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9); > + reg_rm = bits (aarch64_insn_r->aarch64_insn, 16, 20); > + > + wback = bit (aarch64_insn_r->aarch64_insn, 23); > + single = bit (aarch64_insn_r->aarch64_insn, 24); > + ld_flag = bit (aarch64_insn_r->aarch64_insn, 22); > + size_bits = bits (aarch64_insn_r->aarch64_insn, 10, 11); > + opcode_bits = bits (aarch64_insn_r->aarch64_insn, 12, 15); > + regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, &address); > + > + if (single) > + { > + scale = opcode_bits >> 2; > + selem = ((opcode_bits & 0x02) | > + bit (aarch64_insn_r->aarch64_insn, 21)) + 1; > + replicate = 0; > + switch (scale) > + { > + case 2: > + if (!(size_bits & 0x01) && ((size_bits >> 1) & 0x01)) > + scale = 3; > + break; > + case 3: > + scale = size_bits; > + replicate = 1; > + break; > + default: > + break; > + } > + esize = 8 << scale; > + if (replicate) > + for (sindex = 0; sindex < selem; sindex++) > + { > + record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; > + reg_rt = (reg_rt + 1) % 32; > + } > + else > + { > + for (sindex = 0; sindex < selem; sindex++) > + if (ld_flag) > + record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; > + else > + { > + record_buf_mem[mem_index++] = esize / 8; > + record_buf_mem[mem_index++] = address + addr_offset; > + } > + addr_offset = addr_offset + (esize / 8); > + reg_rt = (reg_rt + 1) % 32; > + } > + } > + else > + { > + esize = 8 << size_bits; > + if (bit (aarch64_insn_r->aarch64_insn, 30)) > + elements = 128 / esize; > + else > + elements = 64 / esize; > + > + switch (opcode_bits) > + { > + case 0: > + rpt = 1; > + selem = 4; > + break; > + case 2: > + rpt = 4; > + selem = 1; > + break; > + case 4: > + rpt = 1; > + selem = 3; > + break; > + case 6: > + rpt = 3; > + selem = 1; > + break; > + case 7: > + rpt = 1; > + selem = 1; > + break; > + case 8: > + rpt = 1; > + selem = 2; > + break; > + case 10: > + rpt = 2; > + selem = 1; > + break; > + default: > + return AARCH64_RECORD_USUPPORTED; > + break; > + } > + for (rindex = 0; rindex < rpt; rindex++) > + for (eindex = 0; eindex < elements; eindex++) > + { > + reg_tt = (reg_rt + rindex) % 32; > + for (sindex = 0; sindex < selem; sindex++) > + { > + if (ld_flag) > + record_buf[reg_index++] = reg_tt + AARCH64_V0_REGNUM; > + else > + { > + record_buf_mem[mem_index++] = esize / 8; > + record_buf_mem[mem_index++] = address + addr_offset; > + } > + addr_offset = addr_offset + (esize / 8); > + reg_tt = (reg_tt + 1) % 32; > + } > + } > + } > + > + if (wback) > + record_buf[reg_index++] = reg_rn; > + > + aarch64_insn_r->reg_rec_count = reg_index; > + aarch64_insn_r->mem_rec_count = mem_index / 2; > + MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, > + record_buf_mem); > + REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, > + record_buf); > + return AARCH64_RECORD_SUCCESS; > +} > + > /* Record handler for load and store instructions. */ > static unsigned int > aarch64_record_load_store (insn_decode_record *aarch64_insn_r) > @@ -3226,7 +3364,7 @@ aarch64_record_load_store (insn_decode_record *aarch64_insn_r) > } > /* Advanced SIMD load/store instructions. */ > else > - return AARCH64_RECORD_USUPPORTED; > + return aarch64_record_asimd_load_store (aarch64_insn_r); > > MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, > record_buf_mem); > @@ -3234,6 +3372,91 @@ aarch64_record_load_store (insn_decode_record *aarch64_insn_r) > record_buf); > return AARCH64_RECORD_SUCCESS; > } > + > +/* Record handler for data processing SIMD and floating point instructions. */ > + > +static unsigned int > +aarch64_record_data_proc_simd_fp (insn_decode_record *aarch64_insn_r) > +{ > + uint8_t insn_bit21, opcode, rmode, reg_rd; > + uint8_t insn_bits24_27, insn_bits28_31, insn_bits10_11, insn_bits12_15; > + uint8_t insn_bits11_14; > + uint32_t record_buf[2]; > + > + insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); > + insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31); > + insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11); > + insn_bits12_15 = bits (aarch64_insn_r->aarch64_insn, 12, 15); > + insn_bits11_14 = bits (aarch64_insn_r->aarch64_insn, 11, 14); > + opcode = bits (aarch64_insn_r->aarch64_insn, 16, 18); > + rmode = bits (aarch64_insn_r->aarch64_insn, 19, 20); > + reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); > + insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21); > + > + if ((insn_bits28_31 & 0x05) == 0x01 && insn_bits24_27 == 0x0e) > + { > + /* Floating point - fixed-point conversion instructions. */ > + if (!insn_bit21) > + if ((opcode >> 1) == 0x0 && rmode == 0x03) > + record_buf[0] = reg_rd; > + else > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + /* Floating point conditional compare instructions. */ > + else if (insn_bits10_11 == 0x01) // > + record_buf[0] = AARCH64_CPSR_REGNUM; > + /* Floating-point data-processing (2-source) and conditional select. */ > + else if (insn_bits10_11 == 0x02 || insn_bits10_11 == 0x03) > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + else if (insn_bits10_11 == 0x00) > + { > + /* Floating point immediate instructions. */ > + if ((insn_bits12_15 & 0x01) == 0x01 || (insn_bits12_15 & 0x07) == 0x04) > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + /* Floating point compare instructions. */ > + else if ((insn_bits12_15 & 0x03) == 0x02) > + record_buf[0] = AARCH64_CPSR_REGNUM; > + /* Floating-point - integer conversions instructions. */ > + if (insn_bits12_15 == 0x00) > + { > + /* Type - convert float to integer. */ > + if (!(opcode >> 1) || ((opcode >> 1) == 0x02 && !rmode)) > + record_buf[0] = reg_rd + AARCH64_X0_REGNUM; > + /* Type - convert integer to float. */ > + else if ((opcode >> 1) == 0x01 && !rmode) > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + /* Type - move float to integer. */ > + else if ((opcode >> 1) == 0x03) > + { > + if (!(opcode & 0x01)) > + record_buf[0] = reg_rd + AARCH64_X0_REGNUM; > + else > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + } > + } > + } > + } > + else if ((insn_bits28_31 & 0x09) == 0x00 && insn_bits24_27 == 0x0E) > + { > + /* Advanced SIMD copy instructions. */ > + if (!bits (aarch64_insn_r->aarch64_insn, 21, 23) && > + !bit (aarch64_insn_r->aarch64_insn, 15) && > + bit (aarch64_insn_r->aarch64_insn, 10)) > + if (insn_bits11_14 == 0x05 || insn_bits11_14 == 0x07) > + record_buf[0] = reg_rd + AARCH64_X0_REGNUM; > + else > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + else > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + } > + /* All remaining floating point or advanced SIMD instructions. */ > + else > + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; > + > + REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, > + record_buf); > + return AARCH64_RECORD_SUCCESS; > +} > + > /* Decodes thumb2 instruction type and invokes its record handler. */ > > static unsigned int > @@ -3264,7 +3487,7 @@ aarch64_record_decode_insn_handler (insn_decode_record *aarch64_insn_r) > > /* Data processing - SIMD and floating point instructions. */ > if (ins_bit25 && ins_bit26 && ins_bit27) > - return AARCH64_RECORD_USUPPORTED; > + return aarch64_record_data_proc_simd_fp (aarch64_insn_r); > > return AARCH64_RECORD_USUPPORTED; > } > -- > 1.9.1 >
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c index 2e2dc15..221006a 100644 --- a/gdb/aarch64-tdep.c +++ b/gdb/aarch64-tdep.c @@ -2988,6 +2988,144 @@ aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r) return AARCH64_RECORD_SUCCESS; } +/* Record handler for advance simd load and store instructions. */ +static unsigned int +aarch64_record_asimd_load_store (insn_decode_record *aarch64_insn_r) +{ + CORE_ADDR address; + uint64_t addr_offset = 0; + uint32_t record_buf[24]; + uint64_t record_buf_mem[24]; + uint32_t reg_rn, reg_rt, reg_rm; + uint32_t reg_index = 0, mem_index = 0; + uint8_t eindex, rindex, sindex, reg_tt, replicate; + uint8_t elements, esize, rpt, selem, ebytes, single, scale; + uint8_t opcode_bits, qbit, size_bits, ld_flag, data_size, wback; + + reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); + reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9); + reg_rm = bits (aarch64_insn_r->aarch64_insn, 16, 20); + + wback = bit (aarch64_insn_r->aarch64_insn, 23); + single = bit (aarch64_insn_r->aarch64_insn, 24); + ld_flag = bit (aarch64_insn_r->aarch64_insn, 22); + size_bits = bits (aarch64_insn_r->aarch64_insn, 10, 11); + opcode_bits = bits (aarch64_insn_r->aarch64_insn, 12, 15); + regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, &address); + + if (single) + { + scale = opcode_bits >> 2; + selem = ((opcode_bits & 0x02) | + bit (aarch64_insn_r->aarch64_insn, 21)) + 1; + replicate = 0; + switch (scale) + { + case 2: + if (!(size_bits & 0x01) && ((size_bits >> 1) & 0x01)) + scale = 3; + break; + case 3: + scale = size_bits; + replicate = 1; + break; + default: + break; + } + esize = 8 << scale; + if (replicate) + for (sindex = 0; sindex < selem; sindex++) + { + record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; + reg_rt = (reg_rt + 1) % 32; + } + else + { + for (sindex = 0; sindex < selem; sindex++) + if (ld_flag) + record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; + else + { + record_buf_mem[mem_index++] = esize / 8; + record_buf_mem[mem_index++] = address + addr_offset; + } + addr_offset = addr_offset + (esize / 8); + reg_rt = (reg_rt + 1) % 32; + } + } + else + { + esize = 8 << size_bits; + if (bit (aarch64_insn_r->aarch64_insn, 30)) + elements = 128 / esize; + else + elements = 64 / esize; + + switch (opcode_bits) + { + case 0: + rpt = 1; + selem = 4; + break; + case 2: + rpt = 4; + selem = 1; + break; + case 4: + rpt = 1; + selem = 3; + break; + case 6: + rpt = 3; + selem = 1; + break; + case 7: + rpt = 1; + selem = 1; + break; + case 8: + rpt = 1; + selem = 2; + break; + case 10: + rpt = 2; + selem = 1; + break; + default: + return AARCH64_RECORD_USUPPORTED; + break; + } + for (rindex = 0; rindex < rpt; rindex++) + for (eindex = 0; eindex < elements; eindex++) + { + reg_tt = (reg_rt + rindex) % 32; + for (sindex = 0; sindex < selem; sindex++) + { + if (ld_flag) + record_buf[reg_index++] = reg_tt + AARCH64_V0_REGNUM; + else + { + record_buf_mem[mem_index++] = esize / 8; + record_buf_mem[mem_index++] = address + addr_offset; + } + addr_offset = addr_offset + (esize / 8); + reg_tt = (reg_tt + 1) % 32; + } + } + } + + if (wback) + record_buf[reg_index++] = reg_rn; + + aarch64_insn_r->reg_rec_count = reg_index; + aarch64_insn_r->mem_rec_count = mem_index / 2; + MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, + record_buf_mem); + REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, + record_buf); + return AARCH64_RECORD_SUCCESS; +} + /* Record handler for load and store instructions. */ static unsigned int aarch64_record_load_store (insn_decode_record *aarch64_insn_r) @@ -3226,7 +3364,7 @@ aarch64_record_load_store (insn_decode_record *aarch64_insn_r) } /* Advanced SIMD load/store instructions. */ else - return AARCH64_RECORD_USUPPORTED; + return aarch64_record_asimd_load_store (aarch64_insn_r); MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, record_buf_mem); @@ -3234,6 +3372,91 @@ aarch64_record_load_store (insn_decode_record *aarch64_insn_r) record_buf); return AARCH64_RECORD_SUCCESS; } + +/* Record handler for data processing SIMD and floating point instructions. */ + +static unsigned int +aarch64_record_data_proc_simd_fp (insn_decode_record *aarch64_insn_r) +{ + uint8_t insn_bit21, opcode, rmode, reg_rd; + uint8_t insn_bits24_27, insn_bits28_31, insn_bits10_11, insn_bits12_15; + uint8_t insn_bits11_14; + uint32_t record_buf[2]; + + insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); + insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31); + insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11); + insn_bits12_15 = bits (aarch64_insn_r->aarch64_insn, 12, 15); + insn_bits11_14 = bits (aarch64_insn_r->aarch64_insn, 11, 14); + opcode = bits (aarch64_insn_r->aarch64_insn, 16, 18); + rmode = bits (aarch64_insn_r->aarch64_insn, 19, 20); + reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); + insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21); + + if ((insn_bits28_31 & 0x05) == 0x01 && insn_bits24_27 == 0x0e) + { + /* Floating point - fixed-point conversion instructions. */ + if (!insn_bit21) + if ((opcode >> 1) == 0x0 && rmode == 0x03) + record_buf[0] = reg_rd; + else + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + /* Floating point conditional compare instructions. */ + else if (insn_bits10_11 == 0x01) // + record_buf[0] = AARCH64_CPSR_REGNUM; + /* Floating-point data-processing (2-source) and conditional select. */ + else if (insn_bits10_11 == 0x02 || insn_bits10_11 == 0x03) + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + else if (insn_bits10_11 == 0x00) + { + /* Floating point immediate instructions. */ + if ((insn_bits12_15 & 0x01) == 0x01 || (insn_bits12_15 & 0x07) == 0x04) + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + /* Floating point compare instructions. */ + else if ((insn_bits12_15 & 0x03) == 0x02) + record_buf[0] = AARCH64_CPSR_REGNUM; + /* Floating-point - integer conversions instructions. */ + if (insn_bits12_15 == 0x00) + { + /* Type - convert float to integer. */ + if (!(opcode >> 1) || ((opcode >> 1) == 0x02 && !rmode)) + record_buf[0] = reg_rd + AARCH64_X0_REGNUM; + /* Type - convert integer to float. */ + else if ((opcode >> 1) == 0x01 && !rmode) + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + /* Type - move float to integer. */ + else if ((opcode >> 1) == 0x03) + { + if (!(opcode & 0x01)) + record_buf[0] = reg_rd + AARCH64_X0_REGNUM; + else + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + } + } + } + } + else if ((insn_bits28_31 & 0x09) == 0x00 && insn_bits24_27 == 0x0E) + { + /* Advanced SIMD copy instructions. */ + if (!bits (aarch64_insn_r->aarch64_insn, 21, 23) && + !bit (aarch64_insn_r->aarch64_insn, 15) && + bit (aarch64_insn_r->aarch64_insn, 10)) + if (insn_bits11_14 == 0x05 || insn_bits11_14 == 0x07) + record_buf[0] = reg_rd + AARCH64_X0_REGNUM; + else + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + else + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + } + /* All remaining floating point or advanced SIMD instructions. */ + else + record_buf[0] = reg_rd + AARCH64_V0_REGNUM; + + REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, + record_buf); + return AARCH64_RECORD_SUCCESS; +} + /* Decodes thumb2 instruction type and invokes its record handler. */ static unsigned int @@ -3264,7 +3487,7 @@ aarch64_record_decode_insn_handler (insn_decode_record *aarch64_insn_r) /* Data processing - SIMD and floating point instructions. */ if (ins_bit25 && ins_bit26 && ins_bit27) - return AARCH64_RECORD_USUPPORTED; + return aarch64_record_data_proc_simd_fp (aarch64_insn_r); return AARCH64_RECORD_USUPPORTED; }