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0fe5d9d657
There was a bug in handling of the mxcsr register since cpu flags were not getting updated after fxrstor operations. This small tweak fixes that. [YOCTO #5248] (From OE-Core rev: 5dc43cdc08e6698afa16ba79f3506a1555bb3710) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
When we restore the mxcsr resgister with FXRSTOR, we need to update the various SSE
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flag files by calling update_sse_status() else we're using the flags from some other
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process with interesting results.
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The code isn't ordered to make this easy hence the function declaration.
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Upstream-Status: Pending
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RP 2013/9/30
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Index: qemu-1.5.0/target-i386/fpu_helper.c
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===================================================================
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--- qemu-1.5.0.orig/target-i386/fpu_helper.c 2013-09-30 18:46:39.283377648 +0000
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+++ qemu-1.5.0/target-i386/fpu_helper.c 2013-09-30 18:46:56.895377232 +0000
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@@ -1149,6 +1149,8 @@
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}
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}
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+static void update_sse_status(CPUX86State *env);
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+
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void helper_fxrstor(CPUX86State *env, target_ulong ptr, int data64)
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{
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int i, fpus, fptag, nb_xmm_regs;
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@@ -1180,6 +1182,7 @@
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if (env->cr[4] & CR4_OSFXSR_MASK) {
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/* XXX: finish it */
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env->mxcsr = cpu_ldl_data(env, ptr + 0x18);
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+ update_sse_status(env);
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/* cpu_ldl_data(env, ptr + 0x1c); */
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if (env->hflags & HF_CS64_MASK) {
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nb_xmm_regs = 16;
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