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tcg/s390x: Use ALGFR in constructing softmmu host address 

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

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-04-03 06:14:53 +00:00
parent f0f43534f7
commit 8b1b45971f
1 changed files with 5 additions and 3 deletions
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8
tcg/s390x/tcg-target.c.inc
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@ -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