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target-mips: implement DSP (d)append sub-class with TCG

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DSP instruction from the (d)append sub-class can be implemented with
TCG. Use a different function for these instructions are they are quite
different from compare-pick sub-class.

Fix BALIGN instruction for negative value, where the value should be
zero-extended before being shift to the right.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2013-01-01 18:02:24 +01:00
parent 0a16c79cc4
commit df6126a7f2
3 changed files with 87 additions and 126 deletions
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67
target-mips/dsp_helper.c
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@ -3111,73 +3111,6 @@ PICK_INSN(pick_pw, 2, MIPSDSP_LLO, 32, 0);
#endif
#undef PICK_INSN
#define APPEND_INSN(name, ret_32) \
target_ulong helper_##name(target_ulong rt, target_ulong rs, uint32_t sa) \
{ \
target_ulong temp; \
\
if (ret_32) { \
temp = ((rt & MIPSDSP_LLO) << sa) | \
((rs & MIPSDSP_LLO) & ((0x01 << sa) - 1)); \
temp = (target_long)(int32_t)(temp & MIPSDSP_LLO); \
} else { \
temp = (rt << sa) | (rs & ((0x01 << sa) - 1)); \
} \
\
return temp; \
}
APPEND_INSN(append, 1);
#ifdef TARGET_MIPS64
APPEND_INSN(dappend, 0);
#endif
#undef APPEND_INSN
#define PREPEND_INSN(name, or_val, ret_32) \
target_ulong helper_##name(target_ulong rs, target_ulong rt, \
uint32_t sa) \
{ \
sa |= or_val; \
\
if (1) { \
return (target_long)(int32_t)(uint32_t) \
(((rs & MIPSDSP_LLO) << (32 - sa)) | \
((rt & MIPSDSP_LLO) >> sa)); \
} else { \
return (rs << (64 - sa)) | (rt >> sa); \
} \
}
PREPEND_INSN(prepend, 0, 1);
#ifdef TARGET_MIPS64
PREPEND_INSN(prependw, 0, 0);
PREPEND_INSN(prependd, 0x20, 0);
#endif
#undef PREPEND_INSN
#define BALIGN_INSN(name, filter, ret32) \
target_ulong helper_##name(target_ulong rs, target_ulong rt, uint32_t bp) \
{ \
bp = bp & 0x03; \
\
if ((bp & 1) == 0) { \
return rt; \
} else { \
if (ret32) { \
return (target_long)(int32_t)((rt << (8 * bp)) | \
(rs >> (8 * (4 - bp)))); \
} else { \
return (rt << (8 * bp)) | (rs >> (8 * (8 - bp))); \
} \
} \
}
BALIGN_INSN(balign, 0x03, 1);
#if defined(TARGET_MIPS64)
BALIGN_INSN(dbalign, 0x07, 0);
#endif
#undef BALIGN_INSN
target_ulong helper_packrl_ph(target_ulong rs, target_ulong rt)
{
uint32_t rsl, rth;