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Re: [PATCH v2] target/m68k: implement rtr instruction

From: Richard Henderson
Subject: Re: [PATCH v2] target/m68k: implement rtr instruction
Date: Sun, 7 Mar 2021 10:45:12 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 
On 3/7/21 10:22 AM, Laurent Vivier wrote:

+    ccr = gen_load(s, OS_WORD, QREG_SP, 0, IS_USER(s));
+    gen_set_sr(s, ccr, true);
+    tcg_temp_free(ccr);
+    tcg_gen_addi_i32(QREG_SP, QREG_SP, 2);
+    tmp = gen_load(s, OS_LONG, QREG_SP, 0, IS_USER(s));
+    tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
+    gen_jmp(s, tmp);
Both loads should happen (and thus exceptions recognized) before any other state writeback. 


r~
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