From d33271213437ed1834b0a50540d79e877e1cd894 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Thu, 1 Jun 2017 00:01:19 +0200 Subject: [PATCH] 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 Signed-off-by: Aurelien Jarno Message-Id: <20170531220129.27724-21-aurelien@aurel32.net> Signed-off-by: Richard Henderson --- target/s390x/mem_helper.c | 90 +++++++++++++++++++++-------------------------- target/s390x/translate.c | 40 +++++++++++++++------ 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; } -- 2.11.4.GIT