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[PATCH v2 for-10.0 30/54] target/m68k: In frem helper, initialize local
From: |
Peter Maydell |
Subject: |
[PATCH v2 for-10.0 30/54] target/m68k: In frem helper, initialize local float_status from env->fp_status |
Date: |
Mon, 2 Dec 2024 13:13:23 +0000 |
In the frem helper, we have a local float_status because we want to
execute the floatx80_div() with a custom rounding mode. Instead of
zero-initializing the local float_status and then having to set it up
with the m68k standard behaviour (including the NaN propagation rule
and copying the rounding precision from env->fp_status), initialize
it as a complete copy of env->fp_status. This will avoid our having
to add new code in this function for every new config knob we add
to fp_status.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
target/m68k/fpu_helper.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c
index a605162b71f..e3f4a188501 100644
--- a/target/m68k/fpu_helper.c
+++ b/target/m68k/fpu_helper.c
@@ -615,15 +615,13 @@ void HELPER(frem)(CPUM68KState *env, FPReg *res, FPReg
*val0, FPReg *val1)
fp_rem = floatx80_rem(val1->d, val0->d, &env->fp_status);
if (!floatx80_is_any_nan(fp_rem)) {
- float_status fp_status = { };
+ /* Use local temporary fp_status to set different rounding mode */
+ float_status fp_status = env->fp_status;
uint32_t quotient;
int sign;
/* Calculate quotient directly using round to nearest mode */
- set_float_2nan_prop_rule(float_2nan_prop_ab, &fp_status);
set_float_rounding_mode(float_round_nearest_even, &fp_status);
- set_floatx80_rounding_precision(
- get_floatx80_rounding_precision(&env->fp_status), &fp_status);
fp_quot.d = floatx80_div(val1->d, val0->d, &fp_status);
sign = extractFloatx80Sign(fp_quot.d);
--
2.34.1
- [PATCH v2 for-10.0 23/54] target/xtensa: Set Float3NaNPropRule explicitly, (continued)
- [PATCH v2 for-10.0 23/54] target/xtensa: Set Float3NaNPropRule explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 35/54] tests/fp: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 29/54] target/loongarch: Use normal float_status in fclass_s and fclass_d helpers, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 44/54] target/openrisc: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 32/54] target/sparc: Initialize local scratch float_status from env->fp_status, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 46/54] target/sh4: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 40/54] target/arm: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 25/54] target/hppa: Set Float3NaNPropRule explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 26/54] fpu: Remove use_first_nan field from float_status, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 27/54] target/m68k: Don't pass NULL float_status to floatx80_default_nan(), Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 30/54] target/m68k: In frem helper, initialize local float_status from env->fp_status,
Peter Maydell <=
- [PATCH v2 for-10.0 50/54] target/xtensa: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 45/54] target/ppc: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 37/54] target/i386: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 47/54] target/rx: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 52/54] target/riscv: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 22/54] target/mips: Set Float3NaNPropRule explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 41/54] target/loongarch: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 49/54] target/sparc: Set default NaN pattern explicitly, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 33/54] target/ppc: Use env->fp_status in helper_compute_fprf functions, Peter Maydell, 2024/12/02
- [PATCH v2 for-10.0 34/54] fpu: Allow runtime choice of default NaN value, Peter Maydell, 2024/12/02