target-ppc: emulate cmpb instruction
Needed for Power ISA version 2.05 compliance.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 07397b2..56814b5 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -36,6 +36,7 @@
DEF_HELPER_FLAGS_1(cntlzw, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(popcntb, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(popcntw, TCG_CALL_NO_RWG_SE, tl, tl)
+DEF_HELPER_FLAGS_2(cmpb, TCG_CALL_NO_RWG_SE, tl, tl, tl)
DEF_HELPER_3(sraw, tl, env, tl, tl)
#if defined(TARGET_PPC64)
DEF_HELPER_FLAGS_1(cntlzd, TCG_CALL_NO_RWG_SE, tl, tl)
diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 54eca9b..e50bdd2 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -53,6 +53,21 @@
}
#endif
+target_ulong helper_cmpb(target_ulong rs, target_ulong rb)
+{
+ target_ulong mask = 0xff;
+ target_ulong ra = 0;
+ int i;
+
+ for (i = 0; i < sizeof(target_ulong); i++) {
+ if ((rs & mask) == (rb & mask)) {
+ ra |= mask;
+ }
+ mask <<= 8;
+ }
+ return ra;
+}
+
/* shift right arithmetic helper */
target_ulong helper_sraw(CPUPPCState *env, target_ulong value,
target_ulong shift)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 6cc7893..4d477d2 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -739,6 +739,13 @@
tcg_temp_free_i32(t0);
}
+/* cmpb: PowerPC 2.05 specification */
+static void gen_cmpb(DisasContext *ctx)
+{
+ gen_helper_cmpb(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)],
+ cpu_gpr[rB(ctx->opcode)]);
+}
+
/*** Integer arithmetic ***/
static inline void gen_op_arith_compute_ov(DisasContext *ctx, TCGv arg0,
@@ -8463,6 +8470,7 @@
GEN_HANDLER(cmpi, 0x0B, 0xFF, 0xFF, 0x00400000, PPC_INTEGER),
GEN_HANDLER(cmpl, 0x1F, 0x00, 0x01, 0x00400000, PPC_INTEGER),
GEN_HANDLER(cmpli, 0x0A, 0xFF, 0xFF, 0x00400000, PPC_INTEGER),
+GEN_HANDLER_E(cmpb, 0x1F, 0x1C, 0x0F, 0x00000001, PPC_NONE, PPC2_ISA205),
GEN_HANDLER(isel, 0x1F, 0x0F, 0xFF, 0x00000001, PPC_ISEL),
GEN_HANDLER(addi, 0x0E, 0xFF, 0xFF, 0x00000000, PPC_INTEGER),
GEN_HANDLER(addic, 0x0C, 0xFF, 0xFF, 0x00000000, PPC_INTEGER),
