From c1d9289fef41b82aa22f63f74aa8e730ec898d3c Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Thu, 4 Feb 2016 09:55:10 +0000 Subject: [PATCH] Fix the encoding of the MSP430's RRUX instruction. PR target/19561 opcdoe * msp430-dis.c (print_insn_msp430): Add a special case for decoding an RRC instruction with the ZC bit set in the extension word. include * opcode/msp430.h (IGNORE_CARRY_BIT): New define. (RRUX): Synthesise using case 2 rather than 7. gas * config/tc-msp430.c (msp430_operands): Remove case 7. Use case 2 to handle encoding of RRUX instruction. * testsuite/gas/msp430/msp430x.s: Add more tests of the extended shift instructions. * testsuite/gas/msp430/msp430x.d: Update expected disassembly. --- gas/ChangeLog | 17 ++++++--- gas/config/tc-msp430.c | 60 ++---------------------------- gas/testsuite/gas/msp430/msp430x.d | 53 ++++++++++++++------------ gas/testsuite/gas/msp430/msp430x.s | 8 +++- include/ChangeLog | 6 +++ include/opcode/msp430.h | 15 +++++--- opcodes/ChangeLog | 7 ++++ opcodes/msp430-dis.c | 9 ++++- 8 files changed, 81 insertions(+), 94 deletions(-) diff --git a/gas/ChangeLog b/gas/ChangeLog index e147013b2a2..e64617cac66 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,12 +1,19 @@ +2016-02-04 Nick Clifton + + PR target/19561 + * config/tc-msp430.c (msp430_operands): Remove case 7. Use case 2 + to handle encoding of RRUX instruction. + * testsuite/gas/msp430/msp430x.s: Add more tests of the extended + shift instructions. + * testsuite/gas/msp430/msp430x.d: Update expected disassembly. + 2016-02-03 Max Filippov * config/tc-xtensa.c (md_apply_fix): Mark BFD_RELOC_XTENSA_DIFF* substitutions for BFD_RELOC_* as unsigned. - * gas/testsuite/gas/xtensa/all.exp: Add loc to list of xtensa - tests. - * gas/testsuite/gas/xtensa/loc.d: New file: loc test result - patterns. - * gas/testsuite/gas/xtensa/loc.s: New file: loc test. + * testsuite/gas/xtensa/all.exp: Add loc to list of xtensa tests. + * testsuite/gas/xtensa/loc.d: New file: loc test result patterns. + * testsuite/gas/xtensa/loc.s: New file: loc test. 2016-02-03 Kevin Buettner diff --git a/gas/config/tc-msp430.c b/gas/config/tc-msp430.c index 23b9e779d28..7e340c3614d 100644 --- a/gas/config/tc-msp430.c +++ b/gas/config/tc-msp430.c @@ -3172,63 +3172,6 @@ msp430_operands (struct msp430_opcode_s * opcode, char * line) break; } - case 7: - { - int reg; - - /* RRUX: Synthetic unsigned right shift of a register by one bit. */ - if (extended & 0xff) - { - as_bad (_("repeat count cannot be used with %s"), opcode->name); - break; - } - - line = extract_operand (line, l1, sizeof (l1)); - if ((reg = check_reg (l1)) == -1) - { - as_bad (_("expected register as argument of %s"), - opcode->name); - break; - } - - if (target_is_430xv2 () && reg == 0) - { - as_bad (_("%s: attempt to rotate the PC register"), opcode->name); - break; - } - - if (byte_op) - { - /* Tricky - there is no single instruction that will do this. - Encode as: RRA.B rN { BIC.B #0x80, rN */ - op_length = 6; - frag = frag_more (op_length); - where = frag - frag_now->fr_literal; - bin = 0x1140 | reg; - bfd_putl16 ((bfd_vma) bin, frag); - dwarf2_emit_insn (2); - bin = 0xc070 | reg; - bfd_putl16 ((bfd_vma) bin, frag + 2); - bin = 0x0080; - bfd_putl16 ((bfd_vma) bin, frag + 4); - dwarf2_emit_insn (4); - } - else - { - /* Encode as RRUM[.A] rN. */ - bin = opcode->bin_opcode; - if (! addr_op) - bin |= 0x10; - bin |= reg; - op_length = 2; - frag = frag_more (op_length); - where = frag - frag_now->fr_literal; - bfd_putl16 ((bfd_vma) bin, frag); - dwarf2_emit_insn (op_length); - } - break; - } - case 8: { bfd_boolean need_reloc = FALSE; @@ -3660,6 +3603,9 @@ msp430_operands (struct msp430_opcode_s * opcode, char * line) else if (! addr_op) extended |= BYTE_OPERATION; + if (is_opcode ("rrux")) + extended |= IGNORE_CARRY_BIT; + if (op1.ol != 0 && ((extended & 0xf) != 0)) { as_bad (_("repeat instruction used with non-register mode instruction")); diff --git a/gas/testsuite/gas/msp430/msp430x.d b/gas/testsuite/gas/msp430/msp430x.d index 6bd6db3d928..8eea453e298 100644 --- a/gas/testsuite/gas/msp430/msp430x.d +++ b/gas/testsuite/gas/msp430/msp430x.d @@ -201,27 +201,32 @@ Disassembly of section .text: 0+039e <[^>]*> 54 0b rrum #3, r4 ; 0+03a0 <[^>]*> 44 07 rrum.a #2, r4 ; 0+03a2 <[^>]*> 54 03 rrum #1, r4 ; -0+03a4 <[^>]*> 54 03 rrum #1, r4 ; -0+03a6 <[^>]*> 47 03 rrum.a #1, r7 ; -0+03a8 <[^>]*> 45 11 rra.b r5 ; -0+03aa <[^>]*> 75 c0 80 00 bic.b #128, r5 ;#0x0080 -0+03ae <[^>]*> 56 03 rrum #1, r6 ; -0+03b0 <[^>]*> 40 18 81 10 swpbx.w r1 ; -0+03b4 <[^>]*> 00 18 90 10 00 00 swpbx.a 0x0000 ;PC rel. 0x03b8 -0+03ba <[^>]*> 40 18 8c 10 swpbx.w r12 ; -0+03be <[^>]*> 40 18 82 11 sxtx.w r2 ; -0+03c2 <[^>]*> 00 18 92 11 00 00 sxtx.a &0x0000 ; -0+03c8 <[^>]*> 40 18 82 11 sxtx.w r2 ; -0+03cc <[^>]*> 04 18 45 11 rpt #5 \{ rrax.a r5 ; -0+03d0 <[^>]*> 85 18 45 11 rpt r5 \{ rrax.a r5 ; -0+03d4 <[^>]*> e2 01 adda r1, r2 ; -0+03d6 <[^>]*> c0 01 mova r1, r0 ; -0+03d8 <[^>]*> 41 13 calla r1 ; -0+03da <[^>]*> 40 18 01 43 clrx.w r1 ; -0+03de <[^>]*> d2 01 cmpa r1, r2 ; -0+03e0 <[^>]*> 40 18 21 83 decdx.w r1 ; -0+03e4 <[^>]*> 40 18 21 53 incdx.w r1 ; -0+03e8 <[^>]*> c2 01 mova r1, r2 ; -0+03ea <[^>]*> 10 01 reta ; -0+03ec <[^>]*> f2 01 suba r1, r2 ; -0+03ee <[^>]*> 40 18 80 93 00 00 cmpx.w #0, 0x00000 ;r3 As==00, PC rel. 0x003f2 +0+03a4 <[^>]*> 40 19 04 10 rrux.w r4 ; +0+03a8 <[^>]*> 00 19 47 10 rrux.a r7 ; +0+03ac <[^>]*> 40 19 45 10 rrux.b r5 ; +0+03b0 <[^>]*> 40 19 06 10 rrux.w r6 ; +0+03b4 <[^>]*> 40 18 81 10 swpbx.w r1 ; +0+03b8 <[^>]*> 00 18 90 10 00 00 swpbx.a 0x0000 ;PC rel. 0x03bc +0+03be <[^>]*> 40 18 8c 10 swpbx.w r12 ; +0+03c2 <[^>]*> 40 18 82 11 sxtx.w r2 ; +0+03c6 <[^>]*> 00 18 92 11 00 00 sxtx.a &0x0000 ; +0+03cc <[^>]*> 40 18 82 11 sxtx.w r2 ; +0+03d0 <[^>]*> 04 18 45 11 rpt #5 \{ rrax.a r5 ; +0+03d4 <[^>]*> 85 18 45 11 rpt r5 \{ rrax.a r5 ; +0+03d8 <[^>]*> e2 01 adda r1, r2 ; +0+03da <[^>]*> c0 01 mova r1, r0 ; +0+03dc <[^>]*> 41 13 calla r1 ; +0+03de <[^>]*> 40 18 01 43 clrx.w r1 ; +0+03e2 <[^>]*> d2 01 cmpa r1, r2 ; +0+03e4 <[^>]*> 40 18 21 83 decdx.w r1 ; +0+03e8 <[^>]*> 40 18 21 53 incdx.w r1 ; +0+03ec <[^>]*> c2 01 mova r1, r2 ; +0+03ee <[^>]*> 10 01 reta ; +0+03f0 <[^>]*> f2 01 suba r1, r2 ; +0+03f2 <[^>]*> 40 18 80 93 00 00 cmpx.w #0, 0x00000 ;r3 As==00, PC rel. 0x003f6 +0+03f8 <[^>]*> c1 19 01 10 rpt r1 \{ rrux.w r1 ; +0+03fc <[^>]*> 41 18 02 10 rpt #2 \{ rrcx.w r2 ; +0+0400 <[^>]*> 42 18 47 11 rpt #3 \{ rrax.b r7 ; +0+0404 <[^>]*> 84 18 44 11 rpt r4 \{ rrax.a r4 ; +0+0408 <[^>]*> 44 18 45 55 rpt #5 \{ rlax.b r5 ; +0+040c <[^>]*> 05 18 46 66 rpt #6 \{ rlcx.a r6 ; diff --git a/gas/testsuite/gas/msp430/msp430x.s b/gas/testsuite/gas/msp430/msp430x.s index d968faed98c..8fef8827fb0 100644 --- a/gas/testsuite/gas/msp430/msp430x.s +++ b/gas/testsuite/gas/msp430/msp430x.s @@ -274,4 +274,10 @@ foo: sub.a r1, r2 tst.a fooz - + ;; Check that repeat counts can be used with shift instructions. + rpt r1 { rrux.w r1 + rpt #2 { rrcx.w r2 + rpt #3 { rrax.b r7 + rpt r4 { rrax.a r4 + rpt #5 { rlax.b r5 + rpt #6 { rlcx.a r6 diff --git a/include/ChangeLog b/include/ChangeLog index cbd40b2581c..b637fc996ea 100644 --- a/include/ChangeLog +++ b/include/ChangeLog @@ -1,3 +1,9 @@ +2016-02-04 Nick Clifton + + PR target/19561 + * opcode/msp430.h (IGNORE_CARRY_BIT): New define. + (RRUX): Synthesise using case 2 rather than 7. + 2016-01-19 John Baldwin * elf/common.h (NT_FREEBSD_THRMISC): Define. diff --git a/include/opcode/msp430.h b/include/opcode/msp430.h index 110d7cf6ae0..463e5e66b4a 100644 --- a/include/opcode/msp430.h +++ b/include/opcode/msp430.h @@ -35,7 +35,13 @@ struct msp430_operand_s #endif }; -#define BYTE_OPERATION (1 << 6) /* Byte operation flag for all instructions. */ +/* Byte operation flag for all instructions. Also used as the + A/L bit in the extension word to indicate a 20-bit operation. */ +#define BYTE_OPERATION (1 << 6) +/* Z/C bit in the extension word. If set the carry bit is ignored + for the duration of the operation, although it may be changed as + a result of the operation. */ +#define IGNORE_CARRY_BIT (1 << 8) struct msp430_opcode_s { @@ -46,7 +52,7 @@ struct msp430_opcode_s int bin_mask; }; -#define MSP_INSN(name, size, numb, bin, mask) { #name, size, numb, bin, mask } +#define MSP_INSN(name, fmt, numb, bin, mask) { #name, fmt, numb, bin, mask } static struct msp430_opcode_s msp430_opcodes[] = { @@ -156,7 +162,8 @@ static struct msp430_opcode_s msp430_opcodes[] = MSP_INSN (pushx, -3, 1, 0x1200, 0xff80), MSP_INSN (rrax, -3, 1, 0x1100, 0xff80), - MSP_INSN (rrcx, -3, 1, 0x1000, 0xff80), + MSP_INSN (rrcx, -3, 1, 0x1000, 0xff80), /* Synthesised as RRC but with the Z/C bit clear. */ + MSP_INSN (rrux, -3, 1, 0x1000, 0xff80), /* Synthesised as RRC but with the Z/C bit set. */ MSP_INSN (swpbx, -3, 1, 0x1080, 0xffc0), MSP_INSN (sxtx, -3, 1, 0x1180, 0xffc0), @@ -173,8 +180,6 @@ static struct msp430_opcode_s msp430_opcodes[] = MSP_INSN (rlam, -1, 6, 0x0240, 0xf3e0), MSP_INSN (rrum, -1, 6, 0x0340, 0xf3e0), - MSP_INSN (rrux, -1, 7, 0x0340, 0xffe0), /* Synthesized in terms of RRUM. */ - MSP_INSN (adda, -1, 8, 0x00a0, 0xf0b0), MSP_INSN (cmpa, -1, 8, 0x0090, 0xf0b0), MSP_INSN (suba, -1, 8, 0x00b0, 0xf0b0), diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 83cbe6fd2e5..f7067392150 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,3 +1,10 @@ +2016-02-04 Nick Clifton + + PR target/19561 + * msp430-dis.c (print_insn_msp430): Add a special case for + decoding an RRC instruction with the ZC bit set in the extension + word. + 2016-02-02 Andrew Burgess * cgen-ibld.in (insert_normal): Rework calculation of shift. diff --git a/opcodes/msp430-dis.c b/opcodes/msp430-dis.c index d7e8d8a8da2..676a2d855ef 100644 --- a/opcodes/msp430-dis.c +++ b/opcodes/msp430-dis.c @@ -1102,7 +1102,7 @@ print_insn_msp430 (bfd_vma addr, disassemble_info *info) } else if (extension_word) { - if (extension_word & (1 << 6)) + if (extension_word & BYTE_OPERATION) bc = ".w"; else { @@ -1181,7 +1181,12 @@ print_insn_msp430 (bfd_vma addr, disassemble_info *info) prin (stream, "rpt #%d { ", (extension_word & 0xf) + 1); } - if (extension_word && opcode->name[strlen (opcode->name) - 1] != 'x') + /* Special case: RRC with an extension word and the ZC bit set is actually RRU. */ + if (extension_word + && (extension_word & IGNORE_CARRY_BIT) + && strcmp (opcode->name, "rrc") == 0) + (*prin) (stream, "rrux%s", bc); + else if (extension_word && opcode->name[strlen (opcode->name) - 1] != 'x') (*prin) (stream, "%sx%s", opcode->name, bc); else (*prin) (stream, "%s%s", opcode->name, bc); -- 2.30.2