Convert to Binary - counterparts of the already implemented Convert
to Decimal (CVD*) instructions.
Example from the Principles of Operation: 25594C becomes 63FA.
Signed-off-by: Pavel Zbitskiy <pavel.zbits...@gmail.com>
---
target/s390x/helper.h | 1 +
target/s390x/insn-data.def | 4 +++
target/s390x/int_helper.c | 50 +++++++++++++++++++++++++++++++++
target/s390x/translate.c | 10 +++++++
tests/tcg/s390x/Makefile.target | 1 +
tests/tcg/s390x/cvb.c | 18 ++++++++++++
6 files changed, 84 insertions(+)
create mode 100644 tests/tcg/s390x/cvb.c
diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index 97c60ca7bc..46baaee0ab 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -88,6 +88,7 @@ DEF_HELPER_FLAGS_4(tcxb, TCG_CALL_NO_RWG_SE, i32, env, i64,
i64, i64)
DEF_HELPER_FLAGS_2(sqeb, TCG_CALL_NO_WG, i64, env, i64)
DEF_HELPER_FLAGS_2(sqdb, TCG_CALL_NO_WG, i64, env, i64)
DEF_HELPER_FLAGS_3(sqxb, TCG_CALL_NO_WG, i64, env, i64, i64)
+DEF_HELPER_FLAGS_3(cvb, TCG_CALL_NO_WG, i64, env, i64, i32)
DEF_HELPER_FLAGS_1(cvd, TCG_CALL_NO_RWG_SE, i64, s32)
DEF_HELPER_FLAGS_4(pack, TCG_CALL_NO_WG, void, env, i32, i64, i64)
DEF_HELPER_FLAGS_4(pka, TCG_CALL_NO_WG, void, env, i64, i64, i32)
diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index 9c7b434fca..1b29a5e044 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -284,6 +284,10 @@
D(0xec73, CLFIT, RIE_a, GIE, r1_32u, i2_32u, 0, 0, ct, 0, 1)
D(0xec71, CLGIT, RIE_a, GIE, r1_o, i2_32u, 0, 0, ct, 0, 1)
+/* CONVERT TO BINARY */
+ C(0x4f00, CVB, RX_a, Z, 0, a2, new, r1_32, cvb, 0)
+ C(0xe306, CVBY, RXY_a, LD, 0, a2, new, r1_32, cvb, 0)
+ C(0xe30e, CVBG, RXY_a, Z, 0, a2, r1, 0, cvb, 0)
/* CONVERT TO DECIMAL */
C(0x4e00, CVD, RX_a, Z, r1_o, a2, 0, 0, cvd, 0)
C(0xe326, CVDY, RXY_a, LD, r1_o, a2, 0, 0, cvd, 0)
diff --git a/target/s390x/int_helper.c b/target/s390x/int_helper.c
index abf77a94e6..66c6dc8b3a 100644
--- a/target/s390x/int_helper.c
+++ b/target/s390x/int_helper.c
@@ -24,6 +24,7 @@
#include "exec/exec-all.h"
#include "qemu/host-utils.h"
#include "exec/helper-proto.h"
+#include "exec/cpu_ldst.h"
/* #define DEBUG_HELPER */
#ifdef DEBUG_HELPER
@@ -118,6 +119,55 @@ uint64_t HELPER(divu64)(CPUS390XState *env, uint64_t ah,
uint64_t al,
return ret;
}
+static void general_operand_exception(CPUS390XState *env, uintptr_t ra)
+{
+#ifndef CONFIG_USER_ONLY
+ LowCore *lowcore;
+
+ lowcore = cpu_map_lowcore(env);
+ lowcore->data_exc_code = 0;
+ cpu_unmap_lowcore(lowcore);
+#endif
+ s390_program_interrupt(env, PGM_DATA, ILEN_AUTO, ra);
+}
+
+uint64_t HELPER(cvb)(CPUS390XState *env, uint64_t src, uint32_t n)
+{
+ int i, j;
+ uintptr_t ra = GETPC();
+ int64_t dec, sign = 0, digit, val = 0, pow10 = 0;
+
+ for (i = 0; i < n; i++) {
+ dec = cpu_ldq_data_ra(env, src + (n - i - 1) * 8, ra);
+ for (j = 0; j < 16; j++, dec >>= 4) {
+ if (i == 0 && j == 0) {
+ sign = dec & 0xf;
+ if (sign < 0xa) {
+ general_operand_exception(env, ra);
+ }
+ continue;
+ }
+ digit = dec & 0xf;
+ if (digit > 0x9) {
+ general_operand_exception(env, ra);
+ }
+ if (i == 0 && j == 1) {
+ if (sign == 0xb || sign == 0xd) {
+ val = -digit;
+ pow10 = -10;
+ } else {
+ val = digit;
+ pow10 = 10;
+ }
+ } else {
+ val += digit * pow10;
+ pow10 *= 10;
+ }
+ }
+ }
+ return val;
+}
+
uint64_t HELPER(cvd)(int32_t reg)
{
/* positive 0 */
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index 6f8fbda222..48a97a37ff 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -2107,6 +2107,16 @@ static DisasJumpType op_csp(DisasContext *s, DisasOps *o)
}
#endif
+static DisasJumpType op_cvb(DisasContext *s, DisasOps *o)
+{
+ uint64_t n = ((s->fields->op == 0xE3) && (s->fields->op2 == 0x0E)) ?
+ /* CVBG */ 2 :
+ /* CVB, CVBY */ 1;
+
+ gen_helper_cvb(o->out, cpu_env, o->in2, tcg_const_i32(n));
+ return DISAS_NEXT;
+}
+
static DisasJumpType op_cvd(DisasContext *s, DisasOps *o)
{
TCGv_i64 t1 = tcg_temp_new_i64();
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index 151dc075aa..990dfb26ff 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -6,3 +6,4 @@ TESTS+=ipm
TESTS+=exrl-trt
TESTS+=exrl-trtr
TESTS+=pack
+TESTS+=cvb
diff --git a/tests/tcg/s390x/cvb.c b/tests/tcg/s390x/cvb.c
new file mode 100644
index 0000000000..3a72e132aa
--- /dev/null
+++ b/tests/tcg/s390x/cvb.c
@@ -0,0 +1,18 @@
+#include <stdint.h>
+#include <unistd.h>
+
+int main(void)
+{
+ uint64_t data = 0x000000000025594cull;
+ uint64_t result = 0;
+
+ asm volatile(
+ " cvb %[result],%[data]\n"
+ : [result] "+r" (result)
+ : [data] "m" (data));
+ if (result != 0x63fa) {
+ write(1, "bad result\n", 11);
+ return 1;
+ }
+ return 0;
+}
--
2.18.0
