On 4/10/23 22:04, Richard Henderson wrote:
Since TCG_TYPE_I32 values are kept sign-extended in registers,
via "w" instructions, we need not extend if the register matches.
Perhaps "we don't need to extend if ..." ?
This is already relied upon by comparisons.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
Reviewed-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com>
tcg/riscv/tcg-target.c.inc | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tcg/riscv/tcg-target.c.inc b/tcg/riscv/tcg-target.c.inc
index 7bd3b421ad..2b9aab29ec 100644
--- a/tcg/riscv/tcg-target.c.inc
+++ b/tcg/riscv/tcg-target.c.inc
@@ -604,7 +604,9 @@ static void tcg_out_ext32s(TCGContext *s, TCGReg ret,
TCGReg arg)
static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg)
{
- tcg_out_ext32s(s, ret, arg);
+ if (ret != arg) {
+ tcg_out_ext32s(s, ret, arg);
+ }
}
static void tcg_out_ldst(TCGContext *s, RISCVInsn opc, TCGReg data,
