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target/riscv: Remove the hret instruction
The hret instruction does not exist in the new spec versions, so remove it from QEMU. Backports commit 0736febb2d0e1bb503ca07091c16a16e78480366 from qemu
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@ -75,7 +75,6 @@ ecall 000000000000 00000 000 00000 1110011
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ebreak 000000000001 00000 000 00000 1110011
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uret 0000000 00010 00000 000 00000 1110011
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sret 0001000 00010 00000 000 00000 1110011
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hret 0010000 00010 00000 000 00000 1110011
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mret 0011000 00010 00000 000 00000 1110011
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wfi 0001000 00101 00000 000 00000 1110011
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hfence_gvma 0110001 ..... ..... 000 00000 1110011 @hfence_gvma
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@ -59,11 +59,6 @@ static bool trans_sret(DisasContext *ctx, arg_sret *a)
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#endif
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}
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static bool trans_hret(DisasContext *ctx, arg_hret *a)
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{
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return false;
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}
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static bool trans_mret(DisasContext *ctx, arg_mret *a)
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{
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#ifndef CONFIG_USER_ONLY
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