[PATCH v2 7/9] tcg/mips: Support TCG_TARGET_SIGNED_ADDR32

[Richard Henderson <richard.henderson@linaro.org>]

All 32-bit mips operations sign-extend the output, so we are easily
able to keep TCG_TYPE_I32 values sign-extended in host registers.

Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/mips/tcg-target-sa32.h |  8 ++++++++
 tcg/mips/tcg-target.c.inc  | 10 ++--------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/tcg/mips/tcg-target-sa32.h b/tcg/mips/tcg-target-sa32.h
index cb185b1526..51255e7cba 100644
--- a/tcg/mips/tcg-target-sa32.h
+++ b/tcg/mips/tcg-target-sa32.h
@@ -1 +1,9 @@
+/*
+ * Do not set TCG_TARGET_SIGNED_ADDR32 for mips32;
+ * TCG expects this to only be set for 64-bit hosts.
+ */
+#ifdef __mips64
+#define TCG_TARGET_SIGNED_ADDR32 1
+#else
 #define TCG_TARGET_SIGNED_ADDR32 0
+#endif
diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index 993149d18a..b97c032ded 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -1168,12 +1168,6 @@ static void tcg_out_tlb_load(TCGContext *s, TCGReg base, TCGReg addrl,
                      TCG_TMP0, TCG_TMP3, cmp_off);
     }
 
-    /* Zero extend a 32-bit guest address for a 64-bit host. */
-    if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
-        tcg_out_ext32u(s, base, addrl);
-        addrl = base;
-    }
-
     /*
      * Mask the page bits, keeping the alignment bits to compare against.
      * For unaligned accesses, compare against the end of the access to
@@ -1679,7 +1673,7 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64)
                         data_regl, data_regh, addr_regl, addr_regh,
                         s->code_ptr, label_ptr);
 #else
-    if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
+    if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS && !guest_base_signed_addr32) {
         tcg_out_ext32u(s, base, addr_regl);
         addr_regl = base;
     }
@@ -1878,7 +1872,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
                         data_regl, data_regh, addr_regl, addr_regh,
                         s->code_ptr, label_ptr);
 #else
-    if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
+    if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS && !guest_base_signed_addr32) {
         tcg_out_ext32u(s, base, addr_regl);
         addr_regl = base;
     }
-- 
2.25.1