mesa: remove _mesa_ffs(), implement ffs() for non-GNU platforms

Call ffs() and ffsll() everywhere.  Define our own ffs(), ffsll()
functions when the platform doesn't have them.

v2: remove #ifdef _WIN32, __IBMC__, __IBMCPP_ tests inside ffs()
implementation.  The #else clause was recursive.

Reviewed-by: Kenneth Graunke <[email protected]>
Tested-by: Alexander von Gluck <[email protected]>

2 files changed, 8 insertions, 8 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_emit.c b/src/mesa/drivers/dri/i965/brw_wm_emit.c
index 270e32142de..2647a386f4f 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_emit.c
@@ -766,7 +766,7 @@ void emit_dp2(struct brw_compile *p,
 	      const struct brw_reg *arg0,
 	      const struct brw_reg *arg1)
 {
-   int dst_chan = _mesa_ffs(mask & WRITEMASK_XYZW) - 1;
+   int dst_chan = ffs(mask & WRITEMASK_XYZW) - 1;
 
    if (!(mask & WRITEMASK_XYZW))
       return; /* Do not emit dead code */
@@ -787,7 +787,7 @@ void emit_dp3(struct brw_compile *p,
 	      const struct brw_reg *arg0,
 	      const struct brw_reg *arg1)
 {
-   int dst_chan = _mesa_ffs(mask & WRITEMASK_XYZW) - 1;
+   int dst_chan = ffs(mask & WRITEMASK_XYZW) - 1;
 
    if (!(mask & WRITEMASK_XYZW))
       return; /* Do not emit dead code */
@@ -809,7 +809,7 @@ void emit_dp4(struct brw_compile *p,
 	      const struct brw_reg *arg0,
 	      const struct brw_reg *arg1)
 {
-   int dst_chan = _mesa_ffs(mask & WRITEMASK_XYZW) - 1;
+   int dst_chan = ffs(mask & WRITEMASK_XYZW) - 1;
 
    if (!(mask & WRITEMASK_XYZW))
       return; /* Do not emit dead code */
@@ -832,7 +832,7 @@ void emit_dph(struct brw_compile *p,
 	      const struct brw_reg *arg0,
 	      const struct brw_reg *arg1)
 {
-   const int dst_chan = _mesa_ffs(mask & WRITEMASK_XYZW) - 1;
+   const int dst_chan = ffs(mask & WRITEMASK_XYZW) - 1;
 
    if (!(mask & WRITEMASK_XYZW))
       return; /* Do not emit dead code */
@@ -882,7 +882,7 @@ void emit_math1(struct brw_wm_compile *c,
 {
    struct brw_compile *p = &c->func;
    struct intel_context *intel = &p->brw->intel;
-   int dst_chan = _mesa_ffs(mask & WRITEMASK_XYZW) - 1;
+   int dst_chan = ffs(mask & WRITEMASK_XYZW) - 1;
    GLuint saturate = ((mask & SATURATE) ?
 		      BRW_MATH_SATURATE_SATURATE :
 		      BRW_MATH_SATURATE_NONE);
@@ -945,7 +945,7 @@ void emit_math2(struct brw_wm_compile *c,
 {
    struct brw_compile *p = &c->func;
    struct intel_context *intel = &p->brw->intel;
-   int dst_chan = _mesa_ffs(mask & WRITEMASK_XYZW) - 1;
+   int dst_chan = ffs(mask & WRITEMASK_XYZW) - 1;
 
    if (!(mask & WRITEMASK_XYZW))
       return; /* Do not emit dead code */
diff --git a/src/mesa/drivers/dri/i965/brw_wm_fp.c b/src/mesa/drivers/dri/i965/brw_wm_fp.c
index 1358e749558..b40c501257b 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_fp.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_fp.c
@@ -159,7 +159,7 @@ static struct prog_dst_register dst_undef( void )
 
 static struct prog_dst_register get_temp( struct brw_wm_compile *c )
 {
-   int bit = _mesa_ffs( ~c->fp_temp );
+   int bit = ffs( ~c->fp_temp );
 
    if (!bit) {
       printf("%s: out of temporaries\n", __FILE__);
@@ -260,7 +260,7 @@ static struct prog_instruction *emit_scalar_insn(struct brw_wm_compile *c,
    if (inst0->DstReg.WriteMask == 0)
       return NULL;
 
-   dst_chan = _mesa_ffs(inst0->DstReg.WriteMask) - 1;
+   dst_chan = ffs(inst0->DstReg.WriteMask) - 1;
    inst = get_fp_inst(c);
    *inst = *inst0;
    inst->DstReg.WriteMask = 1 << dst_chan;