From: YunQiang Su <yunqiang.su@cipunited.com>
Date: Fri, 19 Jul 2024 18:01:52 +0000 (+0100)
Subject: MIPS/opcodes: Remove the regular MIPS "+t" operand code
X-Git-Tag: binutils-2_43~54
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=73a833412e2d613be460a0daa3fc33568bec6c13;p=thirdparty%2Fbinutils-gdb.git

MIPS/opcodes: Remove the regular MIPS "+t" operand code

The semantics of the regular MIPS "+t" operand code is exactly the same
as that of the "E" operand code, so replace the former with the latter
in the single MFTC0 instruction with implicit 'sel' == 0 encoding where
it's used, matching the encoding with explicit 'sel' as well as other
instructions.
---

diff --git a/include/opcode/mips.h b/include/opcode/mips.h
index f80110ff844..1e4b3e2679f 100644
--- a/include/opcode/mips.h
+++ b/include/opcode/mips.h
@@ -653,7 +653,6 @@ mips_opcode_32bit_p (const struct mips_opcode *mo)
    "*" 2 bit dsp/smartmips accumulator register (OP_*_MTACC_T)
    "&" 2 bit dsp/smartmips accumulator register (OP_*_MTACC_D)
    "y" 5 bit control target register (OP_*_RT)
-   "+t" 5 bit coprocessor 0 destination register (OP_*_RT)
 
    MCU ASE usage:
    "~" 12 bit offset (OP_*_OFFSET12)
@@ -760,7 +759,7 @@ mips_opcode_32bit_p (const struct mips_opcode *mo)
    "1234567890"
    "~!@#$%^&*|:'";\"
    "ABCEFGHIJKLMNOPQRSTUVWXZ"
-   "abcdefghijklmnopqrstuvwxyz"
+   "abcdefghijklmnopqrs uvwxyz"
 
    Extension character sequences used so far ("-" followed by the
    following), for quick reference when adding more:
diff --git a/opcodes/mips-opc.c b/opcodes/mips-opc.c
index 6389301ea8d..734a0275282 100644
--- a/opcodes/mips-opc.c
+++ b/opcodes/mips-opc.c
@@ -117,7 +117,6 @@ decode_mips_operand (const char *p)
 	case 'q': REG (0, 0, R5900_Q);
 	case 'r': REG (0, 0, R5900_R);
 	case 's': MSB (5, 11, 0, false, 31);	/* (0 .. 31) */
-	case 't': REG (5, 16, COPRO);
 	case 'u': SPECIAL (3, 16, IMM_INDEX);
 	case 'v': SPECIAL (2, 16, IMM_INDEX);
 	case 'w': SPECIAL (1, 16, IMM_INDEX);
@@ -1406,7 +1405,7 @@ const struct mips_opcode mips_builtin_opcodes[] =
 {"mfps",		"t,P",		0x4000c800, 0xffe0ffc1,	WR_1|RD_C0|LC,		0,		M1|N5|EE,	0,	0 },
 {"mftacx",		"d",		0x41020021, 0xffff07ff, WR_1|RD_a|TRAP,		0,		0,		MT32,	0 },
 {"mftacx",		"d,*",		0x41020021, 0xfff307ff, WR_1|RD_a|TRAP,		0,		0,		MT32,	0 },
-{"mftc0",		"d,+t",		0x41000000, 0xffe007ff, WR_1|RD_C0|TRAP|LC,	0,		0,		MT32,	0 },
+{"mftc0",		"d,E",		0x41000000, 0xffe007ff, WR_1|RD_C0|TRAP|LC,	0,		0,		MT32,	0 },
 {"mftc0",		"d,E,H",	0x41000000, 0xffe007f8, WR_1|RD_C0|TRAP|LC,	0,		0,		MT32,	0 },
 {"mftc1",		"d,T",		0x41000022, 0xffe007ff, WR_1|RD_2|TRAP|LC|FP_S, 0,		0,		MT32,	0 },
 {"mftc1",		"d,E",		0x41000022, 0xffe007ff, WR_1|RD_2|TRAP|LC|FP_S, 0,		0,		MT32,	0 },