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[PULL 26/28] linux-user/sparc: Handle floating-point exceptions
From: |
Laurent Vivier |
Subject: |
[PULL 26/28] linux-user/sparc: Handle floating-point exceptions |
Date: |
Fri, 10 Mar 2023 23:09:25 +0100 |
From: Richard Henderson <richard.henderson@linaro.org>
Raise SIGFPE for ieee exceptions.
The other types, such as FSR_FTT_UNIMPFPOP, should not appear,
because we enable normal emulation of missing insns at the
start of sparc_cpu_realizefn().
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-15-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
linux-user/sparc/cpu_loop.c | 22 ++++++++++++++++++++++
target/sparc/cpu.h | 3 +--
2 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c
index 093358a39a4a..5a8a71e976bc 100644
--- a/linux-user/sparc/cpu_loop.c
+++ b/linux-user/sparc/cpu_loop.c
@@ -297,6 +297,28 @@ void cpu_loop (CPUSPARCState *env)
restore_window(env);
break;
+ case TT_FP_EXCP:
+ {
+ int code = TARGET_FPE_FLTUNK;
+ target_ulong fsr = env->fsr;
+
+ if ((fsr & FSR_FTT_MASK) == FSR_FTT_IEEE_EXCP) {
+ if (fsr & FSR_NVC) {
+ code = TARGET_FPE_FLTINV;
+ } else if (fsr & FSR_OFC) {
+ code = TARGET_FPE_FLTOVF;
+ } else if (fsr & FSR_UFC) {
+ code = TARGET_FPE_FLTUND;
+ } else if (fsr & FSR_DZC) {
+ code = TARGET_FPE_FLTDIV;
+ } else if (fsr & FSR_NXC) {
+ code = TARGET_FPE_FLTRES;
+ }
+ }
+ force_sig_fault(TARGET_SIGFPE, code, env->pc);
+ }
+ break;
+
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
diff --git a/target/sparc/cpu.h b/target/sparc/cpu.h
index ed0069d0b196..fb98843dad53 100644
--- a/target/sparc/cpu.h
+++ b/target/sparc/cpu.h
@@ -197,8 +197,7 @@ enum {
#define FSR_FTT2 (1ULL << 16)
#define FSR_FTT1 (1ULL << 15)
#define FSR_FTT0 (1ULL << 14)
-//gcc warns about constant overflow for ~FSR_FTT_MASK
-//#define FSR_FTT_MASK (FSR_FTT2 | FSR_FTT1 | FSR_FTT0)
+#define FSR_FTT_MASK (FSR_FTT2 | FSR_FTT1 | FSR_FTT0)
#ifdef TARGET_SPARC64
#define FSR_FTT_NMASK 0xfffffffffffe3fffULL
#define FSR_FTT_CEXC_NMASK 0xfffffffffffe3fe0ULL
--
2.39.2
- [PULL 18/28] linux-user/sparc: Fix sparc64_{get, set}_context traps, (continued)
- [PULL 18/28] linux-user/sparc: Fix sparc64_{get, set}_context traps, Laurent Vivier, 2023/03/10
- [PULL 22/28] linux-user/sparc: Handle priviledged opcode trap, Laurent Vivier, 2023/03/10
- [PULL 11/28] linux-user: handle netlink flag NLA_F_NESTED, Laurent Vivier, 2023/03/10
- [PULL 23/28] linux-user/sparc: Handle privilidged action trap, Laurent Vivier, 2023/03/10
- [PULL 24/28] linux-user/sparc: Handle coprocessor disabled trap, Laurent Vivier, 2023/03/10
- [PULL 19/28] linux-user/sparc: Handle software breakpoint trap, Laurent Vivier, 2023/03/10
- [PULL 09/28] linux-user: Add strace for prlimit64() syscall, Laurent Vivier, 2023/03/10
- [PULL 16/28] linux-user/sparc: Use TT_TRAP for flush windows, Laurent Vivier, 2023/03/10
- [PULL 21/28] linux-user/sparc: Handle getcc, setcc, getpsr traps, Laurent Vivier, 2023/03/10
- [PULL 10/28] linux-user: fix sockaddr_in6 endianness, Laurent Vivier, 2023/03/10
- [PULL 26/28] linux-user/sparc: Handle floating-point exceptions,
Laurent Vivier <=
- [PULL 25/28] linux-user/sparc: Handle unimplemented flush trap, Laurent Vivier, 2023/03/10
- [PULL 27/28] linux-user/sparc: Handle tag overflow traps, Laurent Vivier, 2023/03/10
- [PULL 28/28] linux-user: fix bug about incorrect base addresss of gdt on i386 and x86_64, Laurent Vivier, 2023/03/10
- Re: [PULL 00/28] Linux user for 8.0 patches, Peter Maydell, 2023/03/12