|
From: | Rafael Kioji |
Subject: | [Qemu-devel] Difference between tcg_gen_ld_i64 and tcg_gen_qemu_ld_i64. |
Date: | Sun, 29 Apr 2018 18:15:18 +0800 |
User-agent: | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 |
Dear all,What is the difference between these two functions? They are located in the file "tcg/tcg-op.c". Here is their header:
1. static inline void tcg_gen_ld_i64(TCGv_i64 ret, TCGv_ptr arg2, tcg_target_long offset) 2. void tcg_gen_qemu_ld_i64(TCGv_i64 val, TCGv addr, TCGArg idx, TCGMemOp memop)I don't quite understand the need for function (1). Especially because it is usually passed "cpu_env" for arg2. Like in target/arm/translate-a64.c:595:
/* Convenience accessors for reading and writing single and double * FP registers. Writing clears the upper parts of the associated * 128 bit vector register, as required by the architecture. * Note that unlike the GP register accessors, the values returned * by the read functions must be manually freed. */ static TCGv_i64 read_fp_dreg(DisasContext *s, int reg) { TCGv_i64 v = tcg_temp_new_i64(); tcg_gen_ld_i64(v, cpu_env, fp_reg_offset(s, reg, MO_64)); return v; }
Thanks!--
Att., Rafael
[Prev in Thread] | Current Thread | [Next in Thread] |