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target-mips: fix decoding of microMIPS POOL32Axf instructions 

Fix incorrect assumption that DSP and non-DSP versions of the following
instructions have the same encoding:
MULT, MULTU, MADD, MADDU, MSUB, MSUBU, MFHI, MFLO, MTHI, MTLO.
Correct the existing (non-DSP) instructions and add DSP equivalents.

Reference:
MIPS Architecture for Programmers Volume II-B: The microMIPS32
Instruction Set
MIPS Architecture for Programmers Volume IV-e: The MIPS DSP Module for
the microMIPS32 Architecture

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Leon Alrae 2013-08-06 11:59:25 +01:00 committed by Aurelien Jarno
parent 79761c6681
commit a1fc6246b3
1 changed files with 54 additions and 6 deletions
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60
target-mips/translate.c
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@ -11061,6 +11061,36 @@ static void gen_pool32axf (CPUMIPSState *env, DisasContext *ctx, int rt, int rs)
}
break;
#endif
case 0x2a:
switch (minor & 3) {
case MADD_ACC:
gen_muldiv(ctx, OPC_MADD, (ctx->opcode >> 14) & 3, rs, rt);
break;
case MADDU_ACC:
gen_muldiv(ctx, OPC_MADDU, (ctx->opcode >> 14) & 3, rs, rt);
break;
case MSUB_ACC:
gen_muldiv(ctx, OPC_MSUB, (ctx->opcode >> 14) & 3, rs, rt);
break;
case MSUBU_ACC:
gen_muldiv(ctx, OPC_MSUBU, (ctx->opcode >> 14) & 3, rs, rt);
break;
default:
goto pool32axf_invalid;
}
break;
case 0x32:
switch (minor & 3) {
case MULT_ACC:
gen_muldiv(ctx, OPC_MULT, (ctx->opcode >> 14) & 3, rs, rt);
break;
case MULTU_ACC:
gen_muldiv(ctx, OPC_MULTU, (ctx->opcode >> 14) & 3, rs, rt);
break;
default:
goto pool32axf_invalid;
}
break;
case 0x2c:
switch (minor) {
case SEB:
@ -11113,7 +11143,7 @@ static void gen_pool32axf (CPUMIPSState *env, DisasContext *ctx, int rt, int rs)
mips32_op = OPC_MSUBU;
do_mul:
check_insn(ctx, ISA_MIPS32);
gen_muldiv(ctx, mips32_op, (ctx->opcode >> 14) & 3, rs, rt);
gen_muldiv(ctx, mips32_op, 0, rs, rt);
break;
default:
goto pool32axf_invalid;
@ -11247,24 +11277,42 @@ static void gen_pool32axf (CPUMIPSState *env, DisasContext *ctx, int rt, int rs)
goto pool32axf_invalid;
}
break;
case 0x35:
case 0x01:
switch (minor & 3) {
case MFHI32:
case MFHI_ACC:
gen_HILO(ctx, OPC_MFHI, minor >> 2, rs);
break;
case MFLO32:
case MFLO_ACC:
gen_HILO(ctx, OPC_MFLO, minor >> 2, rs);
break;
case MTHI32:
case MTHI_ACC:
gen_HILO(ctx, OPC_MTHI, minor >> 2, rs);
break;
case MTLO32:
case MTLO_ACC:
gen_HILO(ctx, OPC_MTLO, minor >> 2, rs);
break;
default:
goto pool32axf_invalid;
}
break;
case 0x35:
switch (minor) {
case MFHI32:
gen_HILO(ctx, OPC_MFHI, 0, rs);
break;
case MFLO32:
gen_HILO(ctx, OPC_MFLO, 0, rs);
break;
case MTHI32:
gen_HILO(ctx, OPC_MTHI, 0, rs);
break;
case MTLO32:
gen_HILO(ctx, OPC_MTLO, 0, rs);
break;
default:
goto pool32axf_invalid;
}
break;
default:
pool32axf_invalid:
MIPS_INVAL("pool32axf");