ARM: Do not use ldrt/strt by default - lightning.git - Portable just-in-time compiler library

Portable just-in-time compiler library

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author	pcpa <paulo.cesar.pereira.de.andrade@gmail.com>	2013年10月08日 12:26:52 -0300
committer	pcpa <paulo.cesar.pereira.de.andrade@gmail.com>	2013年10月08日 12:26:52 -0300
commit	2d4bac43a9b746ec93fa02832fa4cc8ae7ea0a53 (patch)
tree	3fd93fa926413d6f7aaa41b7b8e9543bb97c698c /lib/jit_arm-cpu.c
parent	72f3e65a6d6ffeeadfb9ba3d5b8980ac2b878a90 (diff)
download	lightning-2d4bac43a9b746ec93fa02832fa4cc8ae7ea0a53.tar.gz

ARM: Do not use ldrt/strt by default

* include/lightning/jit_arm.h, lib/jit_arm-cpu.c: Do not use by default load/store instructions that map to ldrt/strt. There is already the long displacement version for positive offsets, and when using a (shorter) negative offset it does not map to ldrt/strt. At least on qemu strt may cause reproducible, but unexpected SIGILL.

Diffstat (limited to 'lib/jit_arm-cpu.c')

-rw-r--r--

lib/jit_arm-cpu.c

1 files changed, 8 insertions, 8 deletions

diff --git a/lib/jit_arm-cpu.c b/lib/jit_arm-cpu.c
index c91ac6e..c0419c3 100644
--- a/lib/jit_arm-cpu.c
+++ b/lib/jit_arm-cpu.c

@@ -2953,7 +2953,7 @@ _ldxi_c(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)

{

jit_int32_t reg;

if (jit_thumb_p()) {

- if (i0 >= 0 && i0 <= 255)

+ if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_LDRSBI(r0, r1, i0);

else if (i0 < 0 && i0 >= -255)

T2_LDRSBIN(r0, r1, -i0);

@@ -3036,7 +3036,7 @@ _ldxi_uc(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)

if (jit_thumb_p()) {

if ((r0|r1) < 8 && i0 >= 0 && i0 < 0x20)

T1_LDRBI(r0, r1, i0);

- else if (i0 >= 0 && i0 <= 255)

+ else if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_LDRBI(r0, r1, i0);

else if (i0 < 0 && i0 >= -255)

T2_LDRBIN(r0, r1, -i0);

@@ -3117,7 +3117,7 @@ _ldxi_s(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)

{

jit_int32_t reg;

if (jit_thumb_p()) {

- if (i0 >= 0 && i0 <= 255)

+ if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_LDRSHI(r0, r1, i0);

else if (i0 < 0 && i0 >= -255)

T2_LDRSHIN(r0, r1, -i0);

@@ -3200,7 +3200,7 @@ _ldxi_us(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)

if (jit_thumb_p()) {

if ((r0|r1) < 8 && i0 >= 0 && !(i0 & 1) && (i0 >> 1) < 0x20)

T1_LDRHI(r0, r1, i0 >> 1);

- else if (i0 >= 0 && i0 <= 255)

+ else if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_LDRHI(r0, r1, i0);

else if (i0 < 0 && i0 >= -255)

T2_LDRHIN(r0, r1, -i0);

@@ -3286,7 +3286,7 @@ _ldxi_i(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1, jit_word_t i0)

else if (r1 == _R13_REGNO && r0 < 8 &&

i0 >= 0 && !(i0 & 3) && (i0 >> 2) <= 255)

T1_LDRISP(r0, i0 >> 2);

- else if (i0 >= 0 && i0 <= 255)

+ else if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_LDRI(r0, r1, i0);

else if (i0 < 0 && i0 > -255)

T2_LDRIN(r0, r1, -i0);

@@ -3369,7 +3369,7 @@ _stxi_c(jit_state_t *_jit, jit_word_t i0, jit_int32_t r0, jit_int32_t r1)

if (jit_thumb_p()) {

if ((r0|r1) < 8 && i0 >= 0 && i0 < 0x20)

T1_STRBI(r1, r0, i0);

- else if (i0 >= 0 && i0 <= 255)

+ else if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_STRBI(r1, r0, i0);

else if (i0 < 0 && i0 >= -255)

T2_STRBIN(r1, r0, -i0);

@@ -3441,7 +3441,7 @@ _stxi_s(jit_state_t *_jit, jit_word_t i0, jit_int32_t r0, jit_int32_t r1)

if (jit_thumb_p()) {

if ((r0|r1) < 8 && i0 >= 0 && !(i0 & 1) && (i0 >> 1) < 0x20)

T1_STRHI(r1, r0, i0 >> 1);

- else if (i0 >= 0 && i0 <= 255)

+ else if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_STRHI(r1, r0, i0);

else if (i0 < 0 && i0 >= -255)

T2_STRHIN(r1, r0, -i0);

@@ -3516,7 +3516,7 @@ _stxi_i(jit_state_t *_jit, jit_word_t i0, jit_int32_t r0, jit_int32_t r1)

else if (r0 == _R13_REGNO && r1 < 8 &&

i0 >= 0 && !(i0 & 3) && (i0 >> 2) <= 255)

T1_STRISP(r1, i0 >> 2);

- else if (i0 >= 0 && i0 <= 255)

+ else if (jit_ldrt_strt_p() && i0 >= 0 && i0 <= 255)

T2_STRI(r1, r0, i0);

else if (i0 < 0 && i0 >= -255)

T2_STRIN(r1, r0, -i0);

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