From eed378d001e952fe07fbb26be7514e173e54a943 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: 2023年1月31日 16:59:58 +0000
Subject: mips: Optimize ldx* generators
There is no need to use a temporary register, when the r0 destination
register can be used instead.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 lib/jit_mips-cpu.c &#124; 98 ++++++++++++++++--------------------------------------
 1 file changed, 28 insertions(+), 70 deletions(-)
(limited to 'lib/jit_mips-cpu.c')
diff --git a/lib/jit_mips-cpu.c b/lib/jit_mips-cpu.c
index 9dbafd6..fee94b5 100644
--- a/lib/jit_mips-cpu.c
+++ b/lib/jit_mips-cpu.c
@@ -1657,120 +1657,90 @@ _ldi_l(jit_state_t *_jit, jit_int32_t r0, jit_word_t i0)
 static void
 _ldxr_c(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1 ,jit_int32_t r2)
 {
- jit_int32_t		reg;
- reg = jit_get_reg(jit_class_gpr);
- addr(rn(reg), r1, r2);
- ldr_c(r0, rn(reg));
- jit_unget_reg(reg);
+ addr(r0, r1, r2);
+ ldr_c(r0, r0);
 }
 
 static void
 _ldxi_c(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
- jit_int32_t		reg;
 if (can_sign_extend_short_p(i0))
 	LB(r0, i0, r1);
 else {
-	reg = jit_get_reg(jit_class_gpr);
-	addi(rn(reg), r1, i0);
-	ldr_c(r0, rn(reg));
-	jit_unget_reg(reg);
+	addi(r0, r1, i0);
+	ldr_c(r0, r0);
 }
 }
 
 static void
 _ldxr_uc(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1 ,jit_int32_t r2)
 {
- jit_int32_t		reg;
- reg = jit_get_reg(jit_class_gpr);
- addr(rn(reg), r1, r2);
- ldr_uc(r0, rn(reg));
- jit_unget_reg(reg);
+ addr(r0, r1, r2);
+ ldr_uc(r0, r0);
 }
 
 static void
 _ldxi_uc(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
- jit_int32_t		reg;
 if (can_sign_extend_short_p(i0))
 	LBU(r0, i0, r1);
 else {
-	reg = jit_get_reg(jit_class_gpr);
-	addi(rn(reg), r1, i0);
-	ldr_uc(r0, rn(reg));
-	jit_unget_reg(reg);
+	addi(r0, r1, i0);
+	ldr_uc(r0, r0);
 }
 }
 
 static void
 _ldxr_s(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1 ,jit_int32_t r2)
 {
- jit_int32_t		reg;
- reg = jit_get_reg(jit_class_gpr);
- addr(rn(reg), r1, r2);
- ldr_s(r0, rn(reg));
- jit_unget_reg(reg);
+ addr(r0, r1, r2);
+ ldr_s(r0, r0);
 }
 
 static void
 _ldxi_s(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
- jit_int32_t		reg;
 if (can_sign_extend_short_p(i0))
 	LH(r0, i0, r1);
 else {
-	reg = jit_get_reg(jit_class_gpr);
-	addi(rn(reg), r1, i0);
-	ldr_s(r0, rn(reg));
-	jit_unget_reg(reg);
+	addi(r0, r1, i0);
+	ldr_s(r0, r0);
 }
 }
 
 static void
 _ldxr_us(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1 ,jit_int32_t r2)
 {
- jit_int32_t		reg;
- reg = jit_get_reg(jit_class_gpr);
- addr(rn(reg), r1, r2);
- ldr_us(r0, rn(reg));
- jit_unget_reg(reg);
+ addr(r0, r1, r2);
+ ldr_us(r0, r0);
 }
 
 static void
 _ldxi_us(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
- jit_int32_t		reg;
 if (can_sign_extend_short_p(i0))
 	LHU(r0, i0, r1);
 else {
-	reg = jit_get_reg(jit_class_gpr);
-	addi(rn(reg), r1, i0);
-	ldr_us(r0, rn(reg));
-	jit_unget_reg(reg);
+	addi(r0, r1, i0);
+	ldr_us(r0, r0);
 }
 }
 
 static void
 _ldxr_i(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1 ,jit_int32_t r2)
 {
- jit_int32_t		reg;
- reg = jit_get_reg(jit_class_gpr);
- addr(rn(reg), r1, r2);
- ldr_i(r0, rn(reg));
- jit_unget_reg(reg);
+ addr(r0, r1, r2);
+ ldr_i(r0, r0);
 }
 
 static void
 _ldxi_i(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
- jit_int32_t		reg;
 if (can_sign_extend_short_p(i0))
 	LW(r0, i0, r1);
 else {
-	reg = jit_get_reg(jit_class_gpr);
-	addi(rn(reg), r1, i0);
-	ldr_i(r0, rn(reg));
-	jit_unget_reg(reg);
+	addi(r0, r1, i0);
+	ldr_i(r0, r0);
 }
 }
 
@@ -1778,48 +1748,36 @@ _ldxi_i(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 static void
 _ldxr_ui(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1 ,jit_int32_t r2)
 {
- jit_int32_t		reg;
- reg = jit_get_reg(jit_class_gpr);
- addr(rn(reg), r1, r2);
- ldr_ui(r0, rn(reg));
- jit_unget_reg(reg);
+ addr(r0, r1, r2);
+ ldr_ui(r0, r0);
 }
 
 static void
 _ldxi_ui(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
- jit_int32_t		reg;
 if (can_sign_extend_short_p(i0))
 	LWU(r0, i0, r1);
 else {
-	reg = jit_get_reg(jit_class_gpr);
-	addi(rn(reg), r1, i0);
-	ldr_ui(r0, rn(reg));
-	jit_unget_reg(reg);
+	addi(r0, r1, i0);
+	ldr_ui(r0, r0);
 }
 }
 
 static void
 _ldxr_l(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1 ,jit_int32_t r2)
 {
- jit_int32_t		reg;
- reg = jit_get_reg(jit_class_gpr);
- addr(rn(reg), r1, r2);
- ldr_l(r0, rn(reg));
- jit_unget_reg(reg);
+ addr(r0, r1, r2);
+ ldr_l(r0, r0);
 }
 
 static void
 _ldxi_l(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)
 {
- jit_int32_t		reg;
 if (can_sign_extend_short_p(i0))
 	LD(r0, i0, r1);
 else {
-	reg = jit_get_reg(jit_class_gpr);
-	addi(rn(reg), r1, i0);
-	ldr_l(r0, rn(reg));
-	jit_unget_reg(reg);
+	addi(r0, r1, i0);
+	ldr_l(r0, r0);
 }
 }
 #endif
-- 
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