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authorbunnei <bunneidev@gmail.com>2014-12-20 22:23:54 +0100
committerbunnei <bunneidev@gmail.com>2014-12-20 22:23:54 +0100
commit993afd3bf0edc72f0143895ca1e682067ea1b6b8 (patch)
treecee699b1e6296e1a2353f8949a3cf55d3f1b1ded /src/core
parentMerge pull request #320 from lioncash/labs (diff)
parentarmemu: Fix SSAT16 (diff)
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Diffstat (limited to 'src/core')
-rw-r--r--src/core/arm/interpreter/armemu.cpp34
1 files changed, 20 insertions, 14 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp
index 06439b73c..7a319b635 100644
--- a/src/core/arm/interpreter/armemu.cpp
+++ b/src/core/arm/interpreter/armemu.cpp
@@ -6091,22 +6091,28 @@ L_stm_s_takeabort:
//ichfly
//SSAT16
{
- u8 tar = BITS(12, 15);
- u8 src = BITS(0, 3);
- u8 val = BITS(16, 19) + 1;
- s16 a1 = (state->Reg[src]);
- s16 a2 = (state->Reg[src] >> 0x10);
- s16 min = (s16)(0x8000 >> (16 - val));
- s16 max = 0x7FFF >> (16 - val);
- if (min > a1) a1 = min;
- if (max < a1) a1 = max;
- if (min > a2) a2 = min;
- if (max < a2) a2 = max;
- u32 temp2 = ((u32)(a2)) << 0x10;
- state->Reg[tar] = (a1 & 0xFFFF) | (temp2);
+ const u8 rd_idx = BITS(12, 15);
+ const u8 rn_idx = BITS(0, 3);
+ const u8 num_bits = BITS(16, 19) + 1;
+ const s16 min = -(0x8000 >> (16 - num_bits));
+ const s16 max = (0x7FFF >> (16 - num_bits));
+ s16 rn_lo = (state->Reg[rn_idx]);
+ s16 rn_hi = (state->Reg[rn_idx] >> 16);
+
+ if (rn_lo > max)
+ rn_lo = max;
+ else if (rn_lo < min)
+ rn_lo = min;
+
+ if (rn_hi > max)
+ rn_hi = max;
+ else if (rn_hi < min)
+ rn_hi = min;
+
+ state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi & 0xFFFF) << 16);
+ return 1;
}
- return 1;
default:
break;
}