[PATCH v4 53/54] tcg/s390x: Use ALGFR in constructing softmmu host address

[Richard Henderson]

Rather than zero-extend the guest address into a register,
use an add instruction which zero-extends the second input.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/s390x/tcg-target.c.inc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tcg/s390x/tcg-target.c.inc b/tcg/s390x/tcg-target.c.inc
index dfcf4d9e34..dd13326670 100644
--- a/tcg/s390x/tcg-target.c.inc
+++ b/tcg/s390x/tcg-target.c.inc
@@ -149,6 +149,7 @@ typedef enum S390Opcode {
     RRE_ALGR    = 0xb90a,
     RRE_ALCR    = 0xb998,
     RRE_ALCGR   = 0xb988,
+    RRE_ALGFR   = 0xb91a,
     RRE_CGR     = 0xb920,
     RRE_CLGR    = 0xb921,
     RRE_DLGR    = 0xb987,
@@ -1853,10 +1854,11 @@ static TCGLabelQemuLdst *prepare_host_addr(TCGContext 
*s, HostAddress *h,
     tcg_out_insn(s, RXY, LG, h->index, TCG_REG_R2, TCG_REG_NONE,
                  offsetof(CPUTLBEntry, addend));
 
-    h->base = addr_reg;
     if (TARGET_LONG_BITS == 32) {
-        tcg_out_ext32u(s, TCG_REG_R3, addr_reg);
-        h->base = TCG_REG_R3;
+        tcg_out_insn(s, RRE, ALGFR, h->index, addr_reg);
+        h->base = TCG_REG_NONE;
+    } else {
+        h->base = addr_reg;
     }
     h->disp = 0;
 #else
-- 
2.34.1