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[PULL,50/68] tcg/aarch64: Expand extract with offset 0 with andi

Message ID 20250117182456.2077110-51-richard.henderson@linaro.org
State New
Headers show
Series [PULL,01/68] disas/riscv: Guard dec->cfg dereference for host disassemble | expand

Commit Message

Richard Henderson Jan. 17, 2025, 6:24 p.m. UTC 
We're about to change canonicalization of masks as extract
instead of and.  Retain the andi expansion here.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/aarch64/tcg-target.c.inc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc
index ede6f47235..66eb4b73b5 100644
--- a/tcg/aarch64/tcg-target.c.inc
+++ b/tcg/aarch64/tcg-target.c.inc
@@ -2450,7 +2450,12 @@  static void tcg_out_op(TCGContext *s, TCGOpcode opc, TCGType ext,
 
     case INDEX_op_extract_i64:
     case INDEX_op_extract_i32:
-        tcg_out_ubfm(s, ext, a0, a1, a2, a2 + args[3] - 1);
+        if (a2 == 0) {
+            uint64_t mask = MAKE_64BIT_MASK(0, args[3]);
+            tcg_out_logicali(s, I3404_ANDI, ext, a0, a1, mask);
+        } else {
+            tcg_out_ubfm(s, ext, a0, a1, a2, a2 + args[3] - 1);
+        }
         break;
 
     case INDEX_op_sextract_i64: