Special case division by small constants
Do the standard reciprocal multiply trick for small division
by small constants.
Change-Id: Iad1060ccdc6ffeb7b47d45c29ba741683ad01ab9
diff --git a/src/compiler/codegen/arm/Assemble.cc b/src/compiler/codegen/arm/Assemble.cc
index 1b7dc29..1d1442a 100644
--- a/src/compiler/codegen/arm/Assemble.cc
+++ b/src/compiler/codegen/arm/Assemble.cc
@@ -964,6 +964,16 @@
kFmtUnused, -1, -1,
IS_UNARY_OP | REG_DEF_SP | REG_USE_SP | REG_DEF0
| IS_LOAD, "pop1", "!0C", 4),
+ ENCODING_MAP(kThumb2RsubRRR, 0xebd00000, /* setflags encoding */
+ kFmtBitBlt, 11, 8, kFmtBitBlt, 19, 16, kFmtBitBlt, 3, 0,
+ kFmtShift, -1, -1,
+ IS_QUAD_OP | REG_DEF0_USE12 | SETS_CCODES,
+ "rsbs", "!0C, !1C, !2C!3H", 4),
+ ENCODING_MAP(kThumb2Smull, 0xfb800000,
+ kFmtBitBlt, 15, 12, kFmtBitBlt, 11, 8, kFmtBitBlt, 19, 16,
+ kFmtBitBlt, 3, 0,
+ IS_QUAD_OP | REG_DEF0 | REG_DEF1 | REG_USE2 | REG_USE3,
+ "smull", "!0C, !1C, !2C, !3C", 4),
};