motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-07 17:53:56 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

target-s390: Convert CONVERT TO FIXED

Browse source 
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2012-08-23 15:17:35 -07:00
parent 24db8412ec
commit 68c8bd93cc
4 changed files with 124 additions and 118 deletions
Download patch file Download diff file Expand all files Collapse all files

98
target-s390x/fpu_helper.c
View file

@ -387,8 +387,9 @@ uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al,
return float_comp_to_cc(env, cmp);
}
static void set_round_mode(CPUS390XState *env, int m3)
static int swap_round_mode(CPUS390XState *env, int m3)
{
int ret = env->fpu_status.float_rounding_mode;
switch (m3) {
case 0:
/* current mode */
@ -412,86 +413,69 @@ static void set_round_mode(CPUS390XState *env, int m3)
set_float_rounding_mode(float_round_down, &env->fpu_status);
break;
}
return ret;
}
/* convert 32-bit float to 64-bit int */
uint32_t HELPER(cgebr)(CPUS390XState *env, uint32_t r1, uint32_t f2,
uint32_t m3)
uint64_t HELPER(cgeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
float32 v2 = env->fregs[f2].l.upper;
set_round_mode(env, m3);
env->regs[r1] = float32_to_int64(v2, &env->fpu_status);
return set_cc_nz_f32(v2);
int hold = swap_round_mode(env, m3);
int64_t ret = float32_to_int64(v2, &env->fpu_status);
set_float_rounding_mode(hold, &env->fpu_status);
handle_exceptions(env, GETPC());
return ret;
}
/* convert 64-bit float to 64-bit int */
uint32_t HELPER(cgdbr)(CPUS390XState *env, uint32_t r1, uint32_t f2,
uint32_t m3)
uint64_t HELPER(cgdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
float64 v2 = env->fregs[f2].d;
set_round_mode(env, m3);
env->regs[r1] = float64_to_int64(v2, &env->fpu_status);
return set_cc_nz_f64(v2);
int hold = swap_round_mode(env, m3);
int64_t ret = float64_to_int64(v2, &env->fpu_status);
set_float_rounding_mode(hold, &env->fpu_status);
handle_exceptions(env, GETPC());
return ret;
}
/* convert 128-bit float to 64-bit int */
uint32_t HELPER(cgxbr)(CPUS390XState *env, uint32_t r1, uint32_t f2,
uint32_t m3)
uint64_t HELPER(cgxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
{
CPU_QuadU v2;
v2.ll.upper = env->fregs[f2].ll;
v2.ll.lower = env->fregs[f2 + 2].ll;
set_round_mode(env, m3);
env->regs[r1] = float128_to_int64(v2.q, &env->fpu_status);
if (float128_is_any_nan(v2.q)) {
return 3;
} else if (float128_is_zero(v2.q)) {
return 0;
} else if (float128_is_neg(v2.q)) {
return 1;
} else {
return 2;
}
int hold = swap_round_mode(env, m3);
float128 v2 = make_float128(h, l);
int64_t ret = float128_to_int64(v2, &env->fpu_status);
set_float_rounding_mode(hold, &env->fpu_status);
handle_exceptions(env, GETPC());
return ret;
}
/* convert 32-bit float to 32-bit int */
uint32_t HELPER(cfebr)(CPUS390XState *env, uint32_t r1, uint32_t f2,
uint32_t m3)
uint64_t HELPER(cfeb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
float32 v2 = env->fregs[f2].l.upper;
set_round_mode(env, m3);
env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) |
float32_to_int32(v2, &env->fpu_status);
return set_cc_nz_f32(v2);
int hold = swap_round_mode(env, m3);
int32_t ret = float32_to_int32(v2, &env->fpu_status);
set_float_rounding_mode(hold, &env->fpu_status);
handle_exceptions(env, GETPC());
return ret;
}
/* convert 64-bit float to 32-bit int */
uint32_t HELPER(cfdbr)(CPUS390XState *env, uint32_t r1, uint32_t f2,
uint32_t m3)
uint64_t HELPER(cfdb)(CPUS390XState *env, uint64_t v2, uint32_t m3)
{
float64 v2 = env->fregs[f2].d;
set_round_mode(env, m3);
env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) |
float64_to_int32(v2, &env->fpu_status);
return set_cc_nz_f64(v2);
int hold = swap_round_mode(env, m3);
int32_t ret = float64_to_int32(v2, &env->fpu_status);
set_float_rounding_mode(hold, &env->fpu_status);
handle_exceptions(env, GETPC());
return ret;
}
/* convert 128-bit float to 32-bit int */
uint32_t HELPER(cfxbr)(CPUS390XState *env, uint32_t r1, uint32_t f2,
uint32_t m3)
uint64_t HELPER(cfxb)(CPUS390XState *env, uint64_t h, uint64_t l, uint32_t m3)
{
CPU_QuadU v2;
v2.ll.upper = env->fregs[f2].ll;
v2.ll.lower = env->fregs[f2 + 2].ll;
env->regs[r1] = (env->regs[r1] & 0xffffffff00000000ULL) |
float128_to_int32(v2.q, &env->fpu_status);
return set_cc_nz_f128(v2.q);
int hold = swap_round_mode(env, m3);
float128 v2 = make_float128(h, l);
int32_t ret = float128_to_int32(v2, &env->fpu_status);
set_float_rounding_mode(hold, &env->fpu_status);
handle_exceptions(env, GETPC());
return ret;
}
/* 32-bit FP multiply and add */