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authorTom Musta <tommusta@gmail.com>2014-01-07 10:05:53 -0600
committerAlexander Graf <agraf@suse.de>2014-03-05 03:06:39 +0100
commit6a4fda3358ca5a21e17d553074f74d512745c4f6 (patch)
tree559d41bc2d46d7e1abfcc070cfd17a6c30811e2b
parente44259b6d4f4de69a868510a198b2696f24118a1 (diff)
target-ppc: Add ISA 2.06 divweu[o] Instructions
This patch addes the Unsigned Divide Word Extended instructions which were introduced in Power ISA 2.06B. Signed-off-by: Tom Musta <tommusta@gmail.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r--target-ppc/helper.h1
-rw-r--r--target-ppc/int_helper.c31
-rw-r--r--target-ppc/translate.c5
3 files changed, 37 insertions, 0 deletions
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index a09a6181b4..52e49f1f0e 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -34,6 +34,7 @@ DEF_HELPER_3(mulldo, i64, env, i64, i64)
DEF_HELPER_4(divdeu, i64, env, i64, i64, i32)
DEF_HELPER_4(divde, i64, env, i64, i64, i32)
#endif
+DEF_HELPER_4(divweu, tl, env, tl, tl, i32)
DEF_HELPER_FLAGS_1(cntlzw, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(popcntb, TCG_CALL_NO_RWG_SE, tl, tl)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 920dba7891..45586be27c 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -41,6 +41,37 @@ uint64_t helper_mulldo(CPUPPCState *env, uint64_t arg1, uint64_t arg2)
}
#endif
+target_ulong helper_divweu(CPUPPCState *env, target_ulong ra, target_ulong rb,
+ uint32_t oe)
+{
+ uint64_t rt = 0;
+ int overflow = 0;
+
+ uint64_t dividend = (uint64_t)ra << 32;
+ uint64_t divisor = (uint32_t)rb;
+
+ if (unlikely(divisor == 0)) {
+ overflow = 1;
+ } else {
+ rt = dividend / divisor;
+ overflow = rt > UINT32_MAX;
+ }
+
+ if (unlikely(overflow)) {
+ rt = 0; /* Undefined */
+ }
+
+ if (oe) {
+ if (unlikely(overflow)) {
+ env->so = env->ov = 1;
+ } else {
+ env->ov = 0;
+ }
+ }
+
+ return (target_ulong)rt;
+}
+
#if defined(TARGET_PPC64)
uint64_t helper_divdeu(CPUPPCState *env, uint64_t ra, uint64_t rb, uint32_t oe)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 7751b294bc..e361d49689 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -998,6 +998,9 @@ static void gen_##name(DisasContext *ctx) \
} \
}
+GEN_DIVE(divweu, divweu, 0);
+GEN_DIVE(divweuo, divweu, 1);
+
#if defined(TARGET_PPC64)
static inline void gen_op_arith_divd(DisasContext *ctx, TCGv ret, TCGv arg1,
TCGv arg2, int sign, int compute_ov)
@@ -9716,6 +9719,8 @@ GEN_INT_ARITH_DIVW(divwu, 0x0E, 0, 0),
GEN_INT_ARITH_DIVW(divwuo, 0x1E, 0, 1),
GEN_INT_ARITH_DIVW(divw, 0x0F, 1, 0),
GEN_INT_ARITH_DIVW(divwo, 0x1F, 1, 1),
+GEN_HANDLER_E(divweu, 0x1F, 0x0B, 0x0C, 0, PPC_NONE, PPC2_DIVE_ISA206),
+GEN_HANDLER_E(divweuo, 0x1F, 0x0B, 0x1C, 0, PPC_NONE, PPC2_DIVE_ISA206),
#if defined(TARGET_PPC64)
#undef GEN_INT_ARITH_DIVD