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author | Maciej W. Rozycki <macro@orcam.me.uk> | 2022-03-06 18:30:58 +0000 |
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committer | Maciej W. Rozycki <macro@orcam.me.uk> | 2022-03-06 18:30:58 +0000 |
commit | d17e797f5c67d3b73de0e387a83134add2b444fe (patch) | |
tree | 7abbda0f4ffb2b779a8537d0baa6162beb570d94 /opcodes/mips-opc.c | |
parent | 13835d88dc51497b9bd68dc1f394ca0de099a380 (diff) | |
download | binutils-d17e797f5c67d3b73de0e387a83134add2b444fe.zip binutils-d17e797f5c67d3b73de0e387a83134add2b444fe.tar.gz binutils-d17e797f5c67d3b73de0e387a83134add2b444fe.tar.bz2 |
MIPS/opcodes: Fix alias annotation for branch instructions
Correct issues with INSN2_ALIAS annotation for branch instructions:
- regular MIPS BEQZ/L and BNEZ/L assembly instructions are idioms for
BEQ/L and BNE/L respectively with the `rs' operand equal to $0,
- microMIPS 32-bit BEQZ and BNEZ assembly instructions are idioms for
BEQ and BNE respectively with the `rt' operand equal to $0,
- regular MIPS BAL assembly instruction is an idiom for architecture
levels of up to the MIPSr5 ISA and a machine instruction on its own
from the MIPSr6 ISA up.
Add missing annotation to BEQZ/L and BNEZ/L accordingly then and add a
new entry for BAL for the MIPSr6 ISA, correcting a disassembly bug:
$ mips-linux-gnu-objdump -m mips:isa64r6 -M no-aliases -d bal.o
bal.o: file format elf32-tradlittlemips
Disassembly of section .text:
00000000 <foo>:
0: 04110000 0x4110000
...
$
Add test cases accordingly.
Parts for regular MIPS BEQZ/L and BNEZ/L instructions from Sagar Patel.
2022-03-06 Maciej W. Rozycki <macro@orcam.me.uk>
binutils/
* testsuite/binutils-all/mips/mips1-branch-alias.d: New test.
* testsuite/binutils-all/mips/mips1-branch-noalias.d: New test.
* testsuite/binutils-all/mips/mips2-branch-alias.d: New test.
* testsuite/binutils-all/mips/mips2-branch-noalias.d: New test.
* testsuite/binutils-all/mips/mips32r6-branch-alias.d: New test.
* testsuite/binutils-all/mips/mips32r6-branch-noalias.d: New
test.
* testsuite/binutils-all/mips/micromips-branch-alias.d: New
test.
* testsuite/binutils-all/mips/micromips-branch-noalias.d: New
test.
* testsuite/binutils-all/mips/mips-branch-alias.s: New test
source.
* testsuite/binutils-all/mips/micromips-branch-alias.s: New test
source.
* testsuite/binutils-all/mips/mips.exp: Run the new tests.
2022-03-06 Sagar Patel <sagarmp@cs.unc.edu>
Maciej W. Rozycki <macro@orcam.me.uk>
opcodes/
* mips-opc.c (mips_builtin_opcodes): Fix INSN2_ALIAS annotation
for "bal", "beqz", "beqzl", "bnez" and "bnezl" instructions.
* micromips-opc.c (micromips_opcodes): Likewise for "beqz" and
"bnez" instructions.
Diffstat (limited to 'opcodes/mips-opc.c')
-rw-r--r-- | opcodes/mips-opc.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/opcodes/mips-opc.c b/opcodes/mips-opc.c index 0f596d5..329bdc6 100644 --- a/opcodes/mips-opc.c +++ b/opcodes/mips-opc.c @@ -460,7 +460,8 @@ const struct mips_opcode mips_builtin_opcodes[] = {"move", "d,s", 0x00000021, 0xfc1f07ff, WR_1|RD_2, INSN2_ALIAS, I1, 0, 0 },/* addu */ {"b", "p", 0x10000000, 0xffff0000, UBD, INSN2_ALIAS, I1, 0, 0 },/* beq 0,0 */ {"b", "p", 0x04010000, 0xffff0000, UBD, INSN2_ALIAS, I1, 0, 0 },/* bgez 0 */ -{"bal", "p", 0x04110000, 0xffff0000, WR_31|UBD, INSN2_ALIAS, I1, 0, 0 },/* bgezal 0*/ +{"bal", "p", 0x04110000, 0xffff0000, WR_31|UBD, INSN2_ALIAS, I1, 0, I37 }, /* bgezal 0 */ +{"bal", "p", 0x04110000, 0xffff0000, WR_31|UBD, 0, I37, 0, 0 }, {"bc", "+'", 0xc8000000, 0xfc000000, NODS, 0, I37, 0, 0 }, {"balc", "+'", 0xe8000000, 0xfc000000, WR_31|NODS, 0, I37, 0, 0 }, {"lapc", "s,-A", 0xec000000, 0xfc180000, WR_1, RD_pc, I37, 0, 0 }, @@ -733,8 +734,8 @@ const struct mips_opcode mips_builtin_opcodes[] = {"bc1tl", "N,p", 0x45030000, 0xffe30000, RD_CC|CBL|FP_S, 0, I4_32, 0, I37 }, /* bc2* are at the bottom of the table. */ /* bc3* are at the bottom of the table. */ -{"beqz", "s,p", 0x10000000, 0xfc1f0000, RD_1|CBD, 0, I1, 0, 0 }, -{"beqzl", "s,p", 0x50000000, 0xfc1f0000, RD_1|CBL, 0, I2|T3, 0, I37 }, +{"beqz", "s,p", 0x10000000, 0xfc1f0000, RD_1|CBD, INSN2_ALIAS, I1, 0, 0 }, +{"beqzl", "s,p", 0x50000000, 0xfc1f0000, RD_1|CBL, INSN2_ALIAS, I2|T3, 0, I37 }, {"beq", "s,t,p", 0x10000000, 0xfc000000, RD_1|RD_2|CBD, 0, I1, 0, 0 }, {"beq", "s,I,p", 0, (int) M_BEQ_I, INSN_MACRO, 0, I1, 0, 0 }, {"beql", "s,t,p", 0x50000000, 0xfc000000, RD_1|RD_2|CBL, 0, I2|T3, 0, I37 }, @@ -784,8 +785,8 @@ const struct mips_opcode mips_builtin_opcodes[] = {"bltzal", "s,p", 0x04100000, 0xfc1f0000, RD_1|WR_31|CBD, 0, I1, 0, I37 }, {"nal", "", 0x04100000, 0xffffffff, WR_31|CBD, 0, I1, 0, 0 }, /* bltzal 0,.+4 */ {"bltzall", "s,p", 0x04120000, 0xfc1f0000, RD_1|WR_31|CBL, 0, I2|T3, 0, I37 }, -{"bnez", "s,p", 0x14000000, 0xfc1f0000, RD_1|CBD, 0, I1, 0, 0 }, -{"bnezl", "s,p", 0x54000000, 0xfc1f0000, RD_1|CBL, 0, I2|T3, 0, I37 }, +{"bnez", "s,p", 0x14000000, 0xfc1f0000, RD_1|CBD, INSN2_ALIAS, I1, 0, 0 }, +{"bnezl", "s,p", 0x54000000, 0xfc1f0000, RD_1|CBL, INSN2_ALIAS, I2|T3, 0, I37 }, {"bne", "s,t,p", 0x14000000, 0xfc000000, RD_1|RD_2|CBD, 0, I1, 0, 0 }, {"bne", "s,I,p", 0, (int) M_BNE_I, INSN_MACRO, 0, I1, 0, 0 }, {"bnel", "s,t,p", 0x54000000, 0xfc000000, RD_1|RD_2|CBL, 0, I2|T3, 0, I37 }, |