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authorPetar Jovanovic <petar.jovanovic@imgtec.com>2013-03-15 18:56:19 +0100
committerAurelien Jarno <aurelien@aurel32.net>2013-03-17 01:06:34 +0100
commit8b758d0568a986d58c254b3c209691c82e0f82a1 (patch)
tree1577cab8cc5b6624914c4df9c4ee5a2a37dbf794 /target-mips/dsp_helper.c
parentb1999e87b4d42305419329cae459e1b43f706d96 (diff)
downloadqemu-arm-8b758d0568a986d58c254b3c209691c82e0f82a1.tar.gz
target-mips: fix rndrashift_short_acc and code for EXTR_ instructions
Fix for rndrashift_short_acc to set correct value to higher 64 bits. This change also corrects conditions when bit 23 of the DSPControl register is set. The existing test files have been extended with several examples that trigger the issues. One bug/example in the test file for EXTR_RS_W has been found and reported by Klaus Peichl. Signed-off-by: Petar Jovanovic <petar.jovanovic@imgtec.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-mips/dsp_helper.c')
-rw-r--r--target-mips/dsp_helper.c23
1 files changed, 9 insertions, 14 deletions
diff --git a/target-mips/dsp_helper.c b/target-mips/dsp_helper.c
index 472be35bbf..c7df595c9b 100644
--- a/target-mips/dsp_helper.c
+++ b/target-mips/dsp_helper.c
@@ -517,13 +517,8 @@ static inline void mipsdsp_rndrashift_short_acc(int64_t *p,
acc = ((int64_t)env->active_tc.HI[ac] << 32) |
((int64_t)env->active_tc.LO[ac] & 0xFFFFFFFF);
- if (shift == 0) {
- p[0] = acc << 1;
- p[1] = (acc >> 63) & 0x01;
- } else {
- p[0] = acc >> (shift - 1);
- p[1] = 0;
- }
+ p[0] = (shift == 0) ? (acc << 1) : (acc >> (shift - 1));
+ p[1] = (acc >> 63) & 0x01;
}
/* 128 bits long. p[0] is LO, p[1] is HI */
@@ -3161,8 +3156,8 @@ target_ulong helper_extr_w(target_ulong ac, target_ulong shift,
tempDL[1] += 1;
}
- if ((!(tempDL[1] == 0 && (tempDL[0] & MIPSDSP_LHI) == 0x00)) &&
- (!(tempDL[1] == 1 && (tempDL[0] & MIPSDSP_LHI) == MIPSDSP_LHI))) {
+ if (((tempDL[1] & 0x01) != 0 || (tempDL[0] & MIPSDSP_LHI) != 0) &&
+ ((tempDL[1] & 0x01) != 1 || (tempDL[0] & MIPSDSP_LHI) != MIPSDSP_LHI)) {
set_DSPControl_overflow_flag(1, 23, env);
}
@@ -3187,8 +3182,8 @@ target_ulong helper_extr_r_w(target_ulong ac, target_ulong shift,
tempDL[1] += 1;
}
- if ((tempDL[1] != 0 || (tempDL[0] & MIPSDSP_LHI) != 0) &&
- (tempDL[1] != 1 && (tempDL[0] & MIPSDSP_LHI) != MIPSDSP_LHI)) {
+ if (((tempDL[1] & 0x01) != 0 || (tempDL[0] & MIPSDSP_LHI) != 0) &&
+ ((tempDL[1] & 0x01) != 1 || (tempDL[0] & MIPSDSP_LHI) != MIPSDSP_LHI)) {
set_DSPControl_overflow_flag(1, 23, env);
}
@@ -3214,9 +3209,9 @@ target_ulong helper_extr_rs_w(target_ulong ac, target_ulong shift,
}
tempI = tempDL[0] >> 1;
- if ((tempDL[1] != 0 || (tempDL[0] & MIPSDSP_LHI) != 0) &&
- (tempDL[1] != 1 || (tempDL[0] & MIPSDSP_LHI) != MIPSDSP_LHI)) {
- temp64 = tempDL[1];
+ if (((tempDL[1] & 0x01) != 0 || (tempDL[0] & MIPSDSP_LHI) != 0) &&
+ ((tempDL[1] & 0x01) != 1 || (tempDL[0] & MIPSDSP_LHI) != MIPSDSP_LHI)) {
+ temp64 = tempDL[1] & 0x01;
if (temp64 == 0) {
tempI = 0x7FFFFFFF;
} else {