diff options
Diffstat (limited to 'libpcsxcore/gte_arm.s')
| -rw-r--r-- | libpcsxcore/gte_arm.s | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libpcsxcore/gte_arm.s b/libpcsxcore/gte_arm.s new file mode 100644 index 0000000..c8a7279 --- /dev/null +++ b/libpcsxcore/gte_arm.s @@ -0,0 +1,68 @@ +/* + * (C) GraÅžvydas "notaz" Ignotas, 2011 + * + * This work is licensed under the terms of any of these licenses + * (at your option): + * - GNU GPL, version 2 or later. + * - GNU LGPL, version 2.1 or later. + * See the COPYING file in the top-level directory. + */ + +/* .equiv HAVE_ARMV7, 1 */ + +.text +.align 2 + +.macro sgnxt16 reg +.if HAVE_ARMV7 + sxth \reg, \reg +.else + lsl \reg, \reg, #16 + asr \reg, \reg, #16 +.endif +.endm + + +.global gteNCLIP_arm @ r0=CP2 (d,c), +gteNCLIP_arm: + push {r4-r6,lr} + + add r1, r0, #4*12 + ldmia r1, {r1-r3} + mov r4, r1, asr #16 + mov r5, r2, asr #16 + mov r6, r3, asr #16 + sub r12, r4, r5 @ 3: gteSY0 - gteSY1 + sub r5, r5, r6 @ 1: gteSY1 - gteSY2 + sgnxt16 r1 + smull r1, r5, r1, r5 @ RdLo, RdHi + sub r6, r4 @ 2: gteSY2 - gteSY0 + sgnxt16 r2 + smlal r1, r5, r2, r6 + mov lr, #0 @ gteFLAG + sgnxt16 r3 + smlal r1, r5, r3, r12 + mov r6, #1<<31 + orr r6, #1<<15 + movs r2, r1, lsl #1 + adc r5, r5 + cmp r5, #0 +.if HAVE_ARMV7 + movtgt lr, #((1<<31)|(1<<16))>>16 +.else + movgt lr, #(1<<31) + orrgt lr, #(1<<16) +.endif + mvngt r1, #1<<31 @ maxint + cmn r5, #1 + movmi r1, #1<<31 @ minint + orrmi lr, r6 + str r1, [r0, #4*24] + str lr, [r0, #4*(32+31)] @ gteFLAG + + pop {r4-r6,pc} + .size gteNCLIP_arm, .-gteNCLIP_arm + + +@ vim:filetype=armasm + |