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target-mips: add MTHC0 and MFHC0 instructions

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Implement MTHC0 and MFHC0 instructions. In MIPS32 they are used to access
upper word of extended to 64-bits CP0 registers.

In MIPS64, when CP0 destination register specified is the EntryLo0 or
EntryLo1, bits 1:0 of the GPR appear at bits 31:30 of EntryLo0 or
EntryLo1. This is to compensate for RI and XI, which were shifted to bits
63:62 by MTC0 to EntryLo0 or EntryLo1. Therefore creating separate
functions for EntryLo0 and EntryLo1.

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Leon Alrae 2014-09-11 16:28:17 +01:00
parent e117f52636
commit 5204ea79ea
3 changed files with 229 additions and 0 deletions
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2
disas/mips.c
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@ -2238,6 +2238,8 @@ const struct mips_opcode mips_builtin_opcodes[] =
{"ceil.l.s", "D,S", 0x4600000a, 0xffff003f, WR_D|RD_S|FP_S|FP_D, 0, I3|I33 },
{"ceil.w.d", "D,S", 0x4620000e, 0xffff003f, WR_D|RD_S|FP_S|FP_D, 0, I2 },
{"ceil.w.s", "D,S", 0x4600000e, 0xffff003f, WR_D|RD_S|FP_S, 0, I2 },
{"mfhc0", "t,G,H", 0x40400000, 0xffe007f8, LCD|WR_t|RD_C0, 0, I33},
{"mthc0", "t,G,H", 0x40c00000, 0xffe007f8, COD|RD_t|WR_C0|WR_CC, 0, I33},
{"cfc0", "t,G", 0x40400000, 0xffe007ff, LCD|WR_t|RD_C0, 0, I1 },
{"cfc1", "t,G", 0x44400000, 0xffe007ff, LCD|WR_t|RD_C1|FP_S, 0, I1 },
{"cfc1", "t,S", 0x44400000, 0xffe007ff, LCD|WR_t|RD_C1|FP_S, 0, I1 },