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Special-case some paths inside tcg_out_tlb_read

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a. Use 32bit arithmetics in TARGET_LONG_BITS == 32 case
b. Optimize byte access case in TARGET_LONG_BITS == 64 case

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4955 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
malc 2008-07-27 11:09:21 +00:00
parent 301f6d903a
commit 4a40e23194
1 changed files with 30 additions and 6 deletions
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36
tcg/ppc64/tcg-target.c
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@ -523,10 +523,28 @@ static void *qemu_st_helpers[4] = {
static void tcg_out_tlb_read (TCGContext *s, int r0, int r1, int r2,
int addr_reg, int s_bits, int offset)
{
#if TARGET_LONG_BITS == 32
#ifdef TARGET_LONG_BITS
tcg_out_rld (s, RLDICL, addr_reg, addr_reg, 0, 32);
#endif
tcg_out32 (s, (RLWINM
| RA (r0)
| RS (addr_reg)
| SH (32 - (TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS))
| MB (32 - (CPU_TLB_BITS + CPU_TLB_ENTRY_BITS))
| ME (31 - CPU_TLB_ENTRY_BITS)
)
);
tcg_out32 (s, ADD | RT (r0) | RA (r0) | RB (TCG_AREG0));
tcg_out32 (s, (LWZU | RT (r1) | RA (r0) | offset));
tcg_out32 (s, (RLWINM
| RA (r2)
| RS (addr_reg)
| SH (0)
| MB ((32 - s_bits) & 31)
| ME (31 - TARGET_PAGE_BITS)
)
);
#else
tcg_out_rld (s, RLDICL, r0, addr_reg,
64 - TARGET_PAGE_BITS,
64 - CPU_TLB_BITS);
@ -537,10 +555,16 @@ static void tcg_out_tlb_read (TCGContext *s, int r0, int r1, int r2,
tcg_out32 (s, ADD | TAB (r0, r0, TCG_AREG0));
tcg_out32 (s, LD_ADDR | RT (r1) | RA (r0) | offset);
tcg_out_rld (s, RLDICL, r2, addr_reg,
64 - TARGET_PAGE_BITS,
TARGET_PAGE_BITS - s_bits);
tcg_out_rld (s, RLDICL, r2, r2, TARGET_PAGE_BITS, 0);
if (!s_bits) {
tcg_out_rld (s, RLDICR, r2, addr_reg, 0, 63 - TARGET_PAGE_BITS);
}
else {
tcg_out_rld (s, RLDICL, r2, addr_reg,
64 - TARGET_PAGE_BITS,
TARGET_PAGE_BITS - s_bits);
tcg_out_rld (s, RLDICL, r2, r2, TARGET_PAGE_BITS, 0);
}
#endif
}
static void tcg_out_qemu_ld (TCGContext *s, const TCGArg *args, int opc)