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-rw-r--r--target/i386/ops_sse.h60
-rw-r--r--target/i386/tcg/fpu_helper.c60
2 files changed, 25 insertions, 95 deletions
diff --git a/target/i386/ops_sse.h b/target/i386/ops_sse.h
index d35fc15c65..0799712f6e 100644
--- a/target/i386/ops_sse.h
+++ b/target/i386/ops_sse.h
@@ -1684,20 +1684,7 @@ void glue(helper_roundps, SUFFIX)(CPUX86State *env, Reg *d, Reg *s,
prev_rounding_mode = env->sse_status.float_rounding_mode;
if (!(mode & (1 << 2))) {
- switch (mode & 3) {
- case 0:
- set_float_rounding_mode(float_round_nearest_even, &env->sse_status);
- break;
- case 1:
- set_float_rounding_mode(float_round_down, &env->sse_status);
- break;
- case 2:
- set_float_rounding_mode(float_round_up, &env->sse_status);
- break;
- case 3:
- set_float_rounding_mode(float_round_to_zero, &env->sse_status);
- break;
- }
+ set_x86_rounding_mode(mode & 3, &env->sse_status);
}
for (i = 0; i < 2 << SHIFT; i++) {
@@ -1721,20 +1708,7 @@ void glue(helper_roundpd, SUFFIX)(CPUX86State *env, Reg *d, Reg *s,
prev_rounding_mode = env->sse_status.float_rounding_mode;
if (!(mode & (1 << 2))) {
- switch (mode & 3) {
- case 0:
- set_float_rounding_mode(float_round_nearest_even, &env->sse_status);
- break;
- case 1:
- set_float_rounding_mode(float_round_down, &env->sse_status);
- break;
- case 2:
- set_float_rounding_mode(float_round_up, &env->sse_status);
- break;
- case 3:
- set_float_rounding_mode(float_round_to_zero, &env->sse_status);
- break;
- }
+ set_x86_rounding_mode(mode & 3, &env->sse_status);
}
for (i = 0; i < 1 << SHIFT; i++) {
@@ -1759,20 +1733,7 @@ void glue(helper_roundss, SUFFIX)(CPUX86State *env, Reg *d, Reg *v, Reg *s,
prev_rounding_mode = env->sse_status.float_rounding_mode;
if (!(mode & (1 << 2))) {
- switch (mode & 3) {
- case 0:
- set_float_rounding_mode(float_round_nearest_even, &env->sse_status);
- break;
- case 1:
- set_float_rounding_mode(float_round_down, &env->sse_status);
- break;
- case 2:
- set_float_rounding_mode(float_round_up, &env->sse_status);
- break;
- case 3:
- set_float_rounding_mode(float_round_to_zero, &env->sse_status);
- break;
- }
+ set_x86_rounding_mode(mode & 3, &env->sse_status);
}
d->ZMM_S(0) = float32_round_to_int(s->ZMM_S(0), &env->sse_status);
@@ -1797,20 +1758,7 @@ void glue(helper_roundsd, SUFFIX)(CPUX86State *env, Reg *d, Reg *v, Reg *s,
prev_rounding_mode = env->sse_status.float_rounding_mode;
if (!(mode & (1 << 2))) {
- switch (mode & 3) {
- case 0:
- set_float_rounding_mode(float_round_nearest_even, &env->sse_status);
- break;
- case 1:
- set_float_rounding_mode(float_round_down, &env->sse_status);
- break;
- case 2:
- set_float_rounding_mode(float_round_up, &env->sse_status);
- break;
- case 3:
- set_float_rounding_mode(float_round_to_zero, &env->sse_status);
- break;
- }
+ set_x86_rounding_mode(mode & 3, &env->sse_status);
}
d->ZMM_D(0) = float64_round_to_int(s->ZMM_D(0), &env->sse_status);
diff --git a/target/i386/tcg/fpu_helper.c b/target/i386/tcg/fpu_helper.c
index a6a90a1817..6f3741b635 100644
--- a/target/i386/tcg/fpu_helper.c
+++ b/target/i386/tcg/fpu_helper.c
@@ -32,7 +32,8 @@
#define ST(n) (env->fpregs[(env->fpstt + (n)) & 7].d)
#define ST1 ST(1)
-#define FPU_RC_MASK 0xc00
+#define FPU_RC_SHIFT 10
+#define FPU_RC_MASK (3 << FPU_RC_SHIFT)
#define FPU_RC_NEAR 0x000
#define FPU_RC_DOWN 0x400
#define FPU_RC_UP 0x800
@@ -685,28 +686,26 @@ uint32_t helper_fnstcw(CPUX86State *env)
return env->fpuc;
}
+static void set_x86_rounding_mode(unsigned mode, float_status *status)
+{
+ static FloatRoundMode x86_round_mode[4] = {
+ float_round_nearest_even,
+ float_round_down,
+ float_round_up,
+ float_round_to_zero
+ };
+ assert(mode < ARRAY_SIZE(x86_round_mode));
+ set_float_rounding_mode(x86_round_mode[mode], status);
+}
+
void update_fp_status(CPUX86State *env)
{
- FloatRoundMode rnd_mode;
+ int rnd_mode;
FloatX80RoundPrec rnd_prec;
/* set rounding mode */
- switch (env->fpuc & FPU_RC_MASK) {
- default:
- case FPU_RC_NEAR:
- rnd_mode = float_round_nearest_even;
- break;
- case FPU_RC_DOWN:
- rnd_mode = float_round_down;
- break;
- case FPU_RC_UP:
- rnd_mode = float_round_up;
- break;
- case FPU_RC_CHOP:
- rnd_mode = float_round_to_zero;
- break;
- }
- set_float_rounding_mode(rnd_mode, &env->fp_status);
+ rnd_mode = (env->fpuc & FPU_RC_MASK) >> FPU_RC_SHIFT;
+ set_x86_rounding_mode(rnd_mode, &env->fp_status);
switch ((env->fpuc >> 8) & 3) {
case 0:
@@ -3038,11 +3037,8 @@ void helper_xsetbv(CPUX86State *env, uint32_t ecx, uint64_t mask)
/* XXX: optimize by storing fptt and fptags in the static cpu state */
#define SSE_DAZ 0x0040
-#define SSE_RC_MASK 0x6000
-#define SSE_RC_NEAR 0x0000
-#define SSE_RC_DOWN 0x2000
-#define SSE_RC_UP 0x4000
-#define SSE_RC_CHOP 0x6000
+#define SSE_RC_SHIFT 13
+#define SSE_RC_MASK (3 << SSE_RC_SHIFT)
#define SSE_FZ 0x8000
void update_mxcsr_status(CPUX86State *env)
@@ -3051,22 +3047,8 @@ void update_mxcsr_status(CPUX86State *env)
int rnd_type;
/* set rounding mode */
- switch (mxcsr & SSE_RC_MASK) {
- default:
- case SSE_RC_NEAR:
- rnd_type = float_round_nearest_even;
- break;
- case SSE_RC_DOWN:
- rnd_type = float_round_down;
- break;
- case SSE_RC_UP:
- rnd_type = float_round_up;
- break;
- case SSE_RC_CHOP:
- rnd_type = float_round_to_zero;
- break;
- }
- set_float_rounding_mode(rnd_type, &env->sse_status);
+ rnd_type = (mxcsr & SSE_RC_MASK) >> SSE_RC_SHIFT;
+ set_x86_rounding_mode(rnd_type, &env->sse_status);
/* Set exception flags. */
set_float_exception_flags((mxcsr & FPUS_IE ? float_flag_invalid : 0) |
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-21 05:09:26 +0000