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tcg/sparc: Split out tcg_out_movi_imm32

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Handle 32-bit constants with a separate function, so that
tcg_out_movi_int does not need to recurse.  This slightly
rearranges the order of tests for small constants, but
produces the same output.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-02-08 10:46:40 +11:00
parent 414399b6b8
commit c71929c345
1 changed files with 21 additions and 15 deletions
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36
tcg/sparc/tcg-target.c.inc
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@ -413,15 +413,30 @@ static void tcg_out_movi_imm13(TCGContext *s, TCGReg ret, int32_t arg)
tcg_out_arithi(s, ret, TCG_REG_G0, arg, ARITH_OR); tcg_out_arithi(s, ret, TCG_REG_G0, arg, ARITH_OR);
} }
static void tcg_out_movi_imm32(TCGContext *s, TCGReg ret, int32_t arg)
{
if (check_fit_i32(arg, 13)) {
/* A 13-bit constant sign-extended to 64-bits. */
tcg_out_movi_imm13(s, ret, arg);
} else {
/* A 32-bit constant zero-extended to 64 bits. */
tcg_out_sethi(s, ret, arg);
if (arg & 0x3ff) {
tcg_out_arithi(s, ret, ret, arg & 0x3ff, ARITH_OR);
}
}
}
static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret, static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret,
tcg_target_long arg, bool in_prologue) tcg_target_long arg, bool in_prologue)
{ {
tcg_target_long hi, lo = (int32_t)arg; tcg_target_long hi, lo = (int32_t)arg;
tcg_target_long test, lsb; tcg_target_long test, lsb;
/* Make sure we test 32-bit constants for imm13 properly. */ /* A 32-bit constant, or 32-bit zero-extended to 64-bits. */
if (type == TCG_TYPE_I32) { if (type == TCG_TYPE_I32 || arg == (uint32_t)arg) {
arg = lo; tcg_out_movi_imm32(s, ret, arg);
return;
} }
/* A 13-bit constant sign-extended to 64-bits. */ /* A 13-bit constant sign-extended to 64-bits. */
@ -439,15 +454,6 @@ static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret,
} }
} }
/* A 32-bit constant, or 32-bit zero-extended to 64-bits. */
if (type == TCG_TYPE_I32 || arg == (uint32_t)arg) {
tcg_out_sethi(s, ret, arg);
if (arg & 0x3ff) {
tcg_out_arithi(s, ret, ret, arg & 0x3ff, ARITH_OR);
}
return;
}
/* A 32-bit constant sign-extended to 64-bits. */ /* A 32-bit constant sign-extended to 64-bits. */
if (arg == lo) { if (arg == lo) {
tcg_out_sethi(s, ret, ~arg); tcg_out_sethi(s, ret, ~arg);
@ -471,13 +477,13 @@ static void tcg_out_movi_int(TCGContext *s, TCGType type, TCGReg ret,
/* A 64-bit constant decomposed into 2 32-bit pieces. */ /* A 64-bit constant decomposed into 2 32-bit pieces. */
if (check_fit_i32(lo, 13)) { if (check_fit_i32(lo, 13)) {
hi = (arg - lo) >> 32; hi = (arg - lo) >> 32;
tcg_out_movi(s, TCG_TYPE_I32, ret, hi); tcg_out_movi_imm32(s, ret, hi);
tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX); tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX);
tcg_out_arithi(s, ret, ret, lo, ARITH_ADD); tcg_out_arithi(s, ret, ret, lo, ARITH_ADD);
} else { } else {
hi = arg >> 32; hi = arg >> 32;
tcg_out_movi(s, TCG_TYPE_I32, ret, hi); tcg_out_movi_imm32(s, ret, hi);
tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T2, lo); tcg_out_movi_imm32(s, TCG_REG_T2, lo);
tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX); tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX);
tcg_out_arith(s, ret, ret, TCG_REG_T2, ARITH_OR); tcg_out_arith(s, ret, ret, TCG_REG_T2, ARITH_OR);
} }