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[Qemu-devel] [PULL 02/31] target/sh4: fix FPU unorderered compare
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PULL 02/31] target/sh4: fix FPU unorderered compare |
Date: |
Tue, 18 Jul 2017 23:50:21 +0200 |
In case of unordered compare, the fcmp instructions should either
trigger and invalid exception (if enabled) or set T=0. The existing code
left it unchanged.
LP: https://bugs.launchpad.net/qemu/+bug/1701821
Reported-by: Bruno Haible <address@hidden>
Message-Id: <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
target/sh4/op_helper.c | 28 ++++++++--------------------
1 file changed, 8 insertions(+), 20 deletions(-)
diff --git a/target/sh4/op_helper.c b/target/sh4/op_helper.c
index 5e3a3ba68c..f228daf125 100644
--- a/target/sh4/op_helper.c
+++ b/target/sh4/op_helper.c
@@ -274,11 +274,8 @@ void helper_fcmp_eq_FT(CPUSH4State *env, float32 t0,
float32 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float32_compare(t0, t1, &env->fp_status);
- if (unlikely(relation == float_relation_unordered)) {
- update_fpscr(env, GETPC());
- } else {
- env->sr_t = (relation == float_relation_equal);
- }
+ update_fpscr(env, GETPC());
+ env->sr_t = (relation == float_relation_equal);
}
void helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1)
@@ -287,11 +284,8 @@ void helper_fcmp_eq_DT(CPUSH4State *env, float64 t0,
float64 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float64_compare(t0, t1, &env->fp_status);
- if (unlikely(relation == float_relation_unordered)) {
- update_fpscr(env, GETPC());
- } else {
- env->sr_t = (relation == float_relation_equal);
- }
+ update_fpscr(env, GETPC());
+ env->sr_t = (relation == float_relation_equal);
}
void helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1)
@@ -300,11 +294,8 @@ void helper_fcmp_gt_FT(CPUSH4State *env, float32 t0,
float32 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float32_compare(t0, t1, &env->fp_status);
- if (unlikely(relation == float_relation_unordered)) {
- update_fpscr(env, GETPC());
- } else {
- env->sr_t = (relation == float_relation_greater);
- }
+ update_fpscr(env, GETPC());
+ env->sr_t = (relation == float_relation_greater);
}
void helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1)
@@ -313,11 +304,8 @@ void helper_fcmp_gt_DT(CPUSH4State *env, float64 t0,
float64 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float64_compare(t0, t1, &env->fp_status);
- if (unlikely(relation == float_relation_unordered)) {
- update_fpscr(env, GETPC());
- } else {
- env->sr_t = (relation == float_relation_greater);
- }
+ update_fpscr(env, GETPC());
+ env->sr_t = (relation == float_relation_greater);
}
float64 helper_fcnvsd_FT_DT(CPUSH4State *env, float32 t0)
--
2.11.0
- [Qemu-devel] [PULL 00/31] target/sh4 queue, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 14/31] target/sh4: Hoist register bank selection, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 18/31] target/sh4: Eliminate unused XREG macro, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 09/31] target/sh4: Adjust TB_FLAG_PENDING_MOVCA, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 02/31] target/sh4: fix FPU unorderered compare,
Aurelien Jarno <=
- [Qemu-devel] [PULL 07/31] target/sh4: Introduce TB_FLAG_ENVFLAGS_MASK, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 19/31] target/sh4: Merge DREG into fpr64 routines, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 24/31] target/sh4: Unify code for CHECK_FPU_ENABLED, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 01/31] target/sh4: do not check for PR bit for fabs instruction, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 26/31] target/sh4: Introduce CHECK_FPSCR_PR_*, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 21/31] target/sh4: Simplify 64-bit fp reg-reg move, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 06/31] target/sh4: Consolidate end-of-TB tests, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 13/31] linux-user/sh4: Clean env->flags on signal boundaries, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 30/31] target/sh4: Implement fsrra, Aurelien Jarno, 2017/07/18
- [Qemu-devel] [PULL 17/31] target/sh4: Hoist fp register bank selection, Aurelien Jarno, 2017/07/18