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authorAurelien Jarno <aurelien@aurel32.net>2017-06-01 00:01:19 +0200
committerRichard Henderson <rth@twiddle.net>2017-06-06 15:20:43 -0700
commitd33271213437ed1834b0a50540d79e877e1cd894 (patch)
tree966d687176f2537e4cbd5c5dfa9679df12fb8772 /target
parent22f04c31980c63c6f842135679b104f0d87d4613 (diff)
downloadqemu-d33271213437ed1834b0a50540d79e877e1cd894.tar.gz
target/s390x: improve MOVE LONG and MOVE LONG EXTENDED
As MVCL and MVCLE only differ by their operands, use a common do_mvcl helper. Optimize it calling fast_memmove and fast_memset. Correctly write back addresses. Check that r1 and r2/r3 registers are even. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Message-Id: <20170531220129.27724-21-aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target')
-rw-r--r--target/s390x/mem_helper.c90
-rw-r--r--target/s390x/translate.c40
2 files changed, 70 insertions, 60 deletions
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
index 2326f0bdb9..3b2ff09fec 100644
--- a/target/s390x/mem_helper.c
+++ b/target/s390x/mem_helper.c
@@ -576,49 +576,60 @@ void HELPER(stam)(CPUS390XState *env, uint32_t r1, uint64_t a2, uint32_t r3)
}
}
-/* move long */
-uint32_t HELPER(mvcl)(CPUS390XState *env, uint32_t r1, uint32_t r2)
+/* move long helper */
+static inline uint32_t do_mvcl(CPUS390XState *env,
+ uint64_t *dest, uint64_t *destlen,
+ uint64_t *src, uint64_t *srclen,
+ uint8_t pad, uintptr_t ra)
{
- uintptr_t ra = GETPC();
- uint64_t destlen = env->regs[r1 + 1] & 0xffffff;
- uint64_t dest = get_address(env, r1);
- uint64_t srclen = env->regs[r2 + 1] & 0xffffff;
- uint64_t src = get_address(env, r2);
- uint8_t pad = env->regs[r2 + 1] >> 24;
- uint8_t v;
+ uint64_t len = MIN(*srclen, *destlen);
uint32_t cc;
- if (destlen == srclen) {
+ if (*destlen == *srclen) {
cc = 0;
- } else if (destlen < srclen) {
+ } else if (*destlen < *srclen) {
cc = 1;
} else {
cc = 2;
}
- if (srclen > destlen) {
- srclen = destlen;
- }
+ /* Copy the src array */
+ fast_memmove(env, *dest, *src, len, ra);
+ *src += len;
+ *srclen -= len;
+ *dest += len;
+ *destlen -= len;
- for (; destlen && srclen; src++, dest++, destlen--, srclen--) {
- v = cpu_ldub_data_ra(env, src, ra);
- cpu_stb_data_ra(env, dest, v, ra);
- }
+ /* Pad the remaining area */
+ fast_memset(env, *dest, pad, *destlen, ra);
+ *dest += *destlen;
+ *destlen = 0;
- for (; destlen; dest++, destlen--) {
- cpu_stb_data_ra(env, dest, pad, ra);
- }
+ return cc;
+}
- env->regs[r1 + 1] = destlen;
- /* can't use srclen here, we trunc'ed it */
- env->regs[r2 + 1] -= src - env->regs[r2];
+/* move long */
+uint32_t HELPER(mvcl)(CPUS390XState *env, uint32_t r1, uint32_t r2)
+{
+ uintptr_t ra = GETPC();
+ uint64_t destlen = env->regs[r1 + 1] & 0xffffff;
+ uint64_t dest = get_address(env, r1);
+ uint64_t srclen = env->regs[r2 + 1] & 0xffffff;
+ uint64_t src = get_address(env, r2);
+ uint8_t pad = env->regs[r2 + 1] >> 24;
+ uint32_t cc;
+
+ cc = do_mvcl(env, &dest, &destlen, &src, &srclen, pad, ra);
+
+ env->regs[r1 + 1] = deposit64(env->regs[r1 + 1], 0, 24, destlen);
+ env->regs[r2 + 1] = deposit64(env->regs[r2 + 1], 0, 24, srclen);
set_address(env, r1, dest);
set_address(env, r2, src);
return cc;
}
-/* move long extended another memcopy insn with more bells and whistles */
+/* move long extended */
uint32_t HELPER(mvcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
uint32_t r3)
{
@@ -627,34 +638,13 @@ uint32_t HELPER(mvcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
uint64_t dest = get_address(env, r1);
uint64_t srclen = get_length(env, r3 + 1);
uint64_t src = get_address(env, r3);
- uint8_t pad = a2 & 0xff;
- uint8_t v;
+ uint8_t pad = a2;
uint32_t cc;
- if (destlen == srclen) {
- cc = 0;
- } else if (destlen < srclen) {
- cc = 1;
- } else {
- cc = 2;
- }
-
- if (srclen > destlen) {
- srclen = destlen;
- }
-
- for (; destlen && srclen; src++, dest++, destlen--, srclen--) {
- v = cpu_ldub_data_ra(env, src, ra);
- cpu_stb_data_ra(env, dest, v, ra);
- }
-
- for (; destlen; dest++, destlen--) {
- cpu_stb_data_ra(env, dest, pad, ra);
- }
+ cc = do_mvcl(env, &dest, &destlen, &src, &srclen, pad, ra);
- set_length(env, r1 + 1 , destlen);
- /* can't use srclen here, we trunc'ed it */
- set_length(env, r3 + 1, env->regs[r3 + 1] - src - env->regs[r3]);
+ set_length(env, r1 + 1, destlen);
+ set_length(env, r3 + 1, srclen);
set_address(env, r1, dest);
set_address(env, r3, src);
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index 2d47f1d2b4..c131f67a60 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -2979,22 +2979,42 @@ static ExitStatus op_mvcin(DisasContext *s, DisasOps *o)
static ExitStatus op_mvcl(DisasContext *s, DisasOps *o)
{
- TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
- TCGv_i32 r2 = tcg_const_i32(get_field(s->fields, r2));
- gen_helper_mvcl(cc_op, cpu_env, r1, r2);
- tcg_temp_free_i32(r1);
- tcg_temp_free_i32(r2);
+ int r1 = get_field(s->fields, r1);
+ int r2 = get_field(s->fields, r2);
+ TCGv_i32 t1, t2;
+
+ /* r1 and r2 must be even. */
+ if (r1 & 1 || r2 & 1) {
+ gen_program_exception(s, PGM_SPECIFICATION);
+ return EXIT_NORETURN;
+ }
+
+ t1 = tcg_const_i32(r1);
+ t2 = tcg_const_i32(r2);
+ gen_helper_mvcl(cc_op, cpu_env, t1, t2);
+ tcg_temp_free_i32(t1);
+ tcg_temp_free_i32(t2);
set_cc_static(s);
return NO_EXIT;
}
static ExitStatus op_mvcle(DisasContext *s, DisasOps *o)
{
- TCGv_i32 r1 = tcg_const_i32(get_field(s->fields, r1));
- TCGv_i32 r3 = tcg_const_i32(get_field(s->fields, r3));
- gen_helper_mvcle(cc_op, cpu_env, r1, o->in2, r3);
- tcg_temp_free_i32(r1);
- tcg_temp_free_i32(r3);
+ int r1 = get_field(s->fields, r1);
+ int r3 = get_field(s->fields, r3);
+ TCGv_i32 t1, t3;
+
+ /* r1 and r3 must be even. */
+ if (r1 & 1 || r3 & 1) {
+ gen_program_exception(s, PGM_SPECIFICATION);
+ return EXIT_NORETURN;
+ }
+
+ t1 = tcg_const_i32(r1);
+ t3 = tcg_const_i32(r3);
+ gen_helper_mvcle(cc_op, cpu_env, t1, o->in2, t3);
+ tcg_temp_free_i32(t1);
+ tcg_temp_free_i32(t3);
set_cc_static(s);
return NO_EXIT;
}